EP0095987B1 - Silk screen printing machine - Google Patents

Silk screen printing machine Download PDF

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Publication number
EP0095987B1
EP0095987B1 EP19830401118 EP83401118A EP0095987B1 EP 0095987 B1 EP0095987 B1 EP 0095987B1 EP 19830401118 EP19830401118 EP 19830401118 EP 83401118 A EP83401118 A EP 83401118A EP 0095987 B1 EP0095987 B1 EP 0095987B1
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EP
European Patent Office
Prior art keywords
carriage
lever
squeegee
screen
printing machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19830401118
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German (de)
French (fr)
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EP0095987A1 (en
Inventor
Eric Rouly
Jean-Pierre Douville
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe dExploitation des Machines Dubuit SA
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Societe dExploitation des Machines Dubuit SA
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Publication of EP0095987A1 publication Critical patent/EP0095987A1/en
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Publication of EP0095987B1 publication Critical patent/EP0095987B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0872—Machines for printing on articles having essentially cylindrical surfaces

Definitions

  • the present invention relates generally to printing machines on the silk screen, and more particularly relates to those intended in particular, but not exclusively, for printing objects, bottles, for example, of oval cross section.
  • a silk screen printing machine generally comprises, at least one printing station, on the one hand a screen, forming a stencil, and on the other hand a squeegee mounted movable transversely to the screen to be moved away from it during its return movement, between two impressions.
  • the screen is carried by a screen carriage mounted movable back and forth on a guide, and it is the same for the squeegee.
  • a conveyor which carries from place to place specific object supports each to the support of an object to be printed, and which is passed in endless loop on the at least two return members of which at least one is a motor.
  • the advance of this conveyor can be done step by step, the printing of objects being done in turn during its stops.
  • each of the objects concerned then moves along a circular path, the radius of which, hereinafter said for convenience, radius of gyration, is equal to that of the corresponding return member of the conveyor.
  • the rotary block that usually comprise, for application to an object to be printed, the rotational drive means provided to ensure at least partial rotation on itself of such an object during of its impression, hereinafter said for convenience, support block, is wedged on a pinion meshing itself with a fixed rack bent at the corresponding radius of gyration and that jointly, the screen is the object, transverse to its path , of a compensating movement like that of such an object.
  • this radius of curvature varies.
  • a general object of the present invention is a provision making it relatively simple to overcome these difficulties, and capable in particular of being relatively easily adapted to printing objects of oval cross section with different radii of curvature, all by being equipped with a continuous advance conveyor.
  • the present invention relates to a silk screen printing machine, of the type comprising, for serving at least one printing station, a conveyor carrying at least one, and in practice, from place to place, a plurality of object-holder supports each suitable for supporting an object to be printed, and, at said printing station, a screen, which is carried by a screen-holder carriage mounted movable back and forth comes on a guide, a squeegee, which is carried by a squeegee carriage mounted movable back and forth on a guide parallel to the previous one, and a block, which, hereinafter said for convenience, support block, is likely, by pressing on the object to be printed, to control the angular orientation around a transverse axis with respect to the guides of the screen carrier carriage and the squeegee carriage, this machine being generally characterized in that said support block is locked in rotation on a lever which, by engagement means adjustable in position along its length, meshes with a control carriage mounted to move on a guide in synchronism with
  • engagement means are simply constituted by a lug, a roller for example, freely engaged in a slide that carries for this purpose the carriage concerned.
  • each of the objects to be printed can, as previously, develop by its corresponding face in contact with the silk screen during the displacement thereof with a slight rotational movement on itself.
  • the present invention is particularly suitable for the case where, at the printing station, the conveyor, which is in continuous advance, passes over a circular return member.
  • the machine according to the invention makes it possible to obtain '' a movement of linear contact between such objects and the silk screen, guaranteeing a good impression for these objects.
  • the printing machine according to the invention can not only be suitable for printing objects to be printed with an oval transverse section, whatever, within a wide range, the radius of curvature of the face. to print them, but still be suitable, with rapid and easy adaptation, for printing objects of circular cross section.
  • FIGS. 1 to 7 illustrate the application of the invention to the printing of bottles of oval cross section 10.
  • bottles made of synthetic material are bottles made of synthetic material.
  • such a bottle 10 comprises, overall, a neck 11 and a base 12.
  • the face 14 to be printed of such a bottle 10 or at least the middle portion of this face actually intended to receive an impression, will be assimilated here to a portion of cylindrical surface of radius R.
  • the printing machine according to the invention comprises, of course, a frame, the production of which is within the skill of the art, and will therefore not be described in detail here.
  • the printing machine comprises, for serving at least one printing station 17, detailed below, a conveyor 15, which carries at least one support object 16 specific to the support of a bottle 10 to be printed, and, in practice, from place to place, a plurality of such object-holder supports 16 each suitable for the support of such a bottle 10 to be printed.
  • Such a conveyor 15 has only been partially and schematically shown in the figures.
  • the conveyor 15 thus formed is in practice an endless conveyor passed in a loop on at least two return members, at least one of which is motor.
  • the conveyor 15 thus passes over a return member 20 to the printing station 17, and, preferably, as shown, it is circular.
  • toothed wheel rotatably mounted on the frame 13 and having from place to place, at its periphery, recesses suitable for the passage of the object-holder supports 16.
  • this return member 20 On either side of this return member 20, and at a lower level, two other return members 21 are provided, for application of the conveyor 15 to the return member 20 along the upper half-circumference thereof. .
  • the return members 21 are for example toothed wheels rotatably mounted on the frame 13, like the return member 20.
  • any of the return members 20, 21 is motor.
  • control means thus provided for the rotational drive of the engine return member of the conveyor 15 are adapted to ensure continuous rotation.
  • the conveyor 15 is in continuous advance.
  • each object support 16 comprises a tubular body 27, which, by lateral ears 28, is articulated, in the manner of a link, to the chains 18 constituting the conveyor 15, and which carries projecting a core 29, on which a bottle 10 to be printed can be engaged by its neck 11.
  • the core 29 which it comprises is equipped with a holding member capable of ensuring, by application against the internal wall of the neck 11 of the bottle 10 to be printed engaged on it, a firm holding of such a bottle 10.
  • the vials 10 to be printed extend transversely relative to the longitudinal displacement of the conveyor 15, that is to say parallel to the axes of the return members 20, 21 thereof.
  • the printing machine comprises, on the one hand, a silk screen 30, forming a stencil, carried by a carriage 31, referred to below as a screen-carrying carriage, which is mounted movable longitudinally back and forth on a guide 32, and, on the other hand, a squeegee 33, carried by a carriage 34, which is also mounted movable longitudinally back and forth on a guide 35, parallel to the previous one.
  • the guide 32 of the screen-carrying carriage 31 consists of two parallel bars 37, which run from one component of the frame 13 to another, parallel to the conveyor 15.
  • the screen-carrying carriage 31 includes a frame 39, for supporting the screen 30, and two blocks 40, which, slidably engaged on the bars 37 constituting the associated guide 32, carry the frame 39.
  • the mounting of the screen 30 on its carriage 31 can in fact be done so as to allow the screen 30 to be raised relative to the conveyor 15 if necessary, for example under the control of a cylinder.
  • the guide 35 of the squeegee carriage 34 consists of three parallel bars 41, which run from one component of the frame 13 to another, parallel to the conveyor 15, and therefore parallel to the bars 37 constituting the guide 32 of the screen carriage 31.
  • the squeegee 33 is mounted movable transversely with respect to the screen 30, in order to be able to be moved away from it during its return movement following printing.
  • the screen carriage 31 is controlled in synchronism with the squeegee carriage 34, from a rotary shaft 44, which, hereinafter said oscillating shaft, is coaxial with the return member 20 and which, in synchronism with the screen carriage 31 and the squeegee carriage 34 is mounted oscillating about its axis, between two bearings 45 integral with the frame 13, under the control of a rotary cam 46 locked in rotation, possibly via any suitable transmission, on the output shaft of the gear motor 25.
  • a lever 48 which, by engagement means, in practice a roller 49, meshes with a track 50 of the cam 46, established on a face thereof perpendicular to its axis of rotation.
  • the oscillating shaft 44 is in two parts 44A, 44B, which mesh with one another by a grooved assembly established between, on the one hand, the part 44A , and on the other hand, a sleeve 52 on which the part 44B is rotated; while the part 44A which is the one carrying the lever 48, is axially fixed, the part 44B is axially movable back and forth, the sleeve 52 on which it is wedged meshing for example for this purpose, according to methods which are well known in themselves and which are not visible in the figures, with a rotary cam locked in rotation on the output shaft of the gear motor 25, the corresponding track of this cam being for example established in this case on the edge of that -this.
  • the lever 48 forms one of the sides of a deformable parallelogram whose opposite side is constituted by a lever 54, and the latter, by engagement means adjustable in position along its length, meshes with the squeegee trolley 34.
  • levers 48 and 54 are connected to each other by a connecting rod 55 articulated to each of them, and the lever 54 is wedged on a shaft 56 rotatably mounted in a bearing 53 integral with the frame 13.
  • the engagement means which door adjustable in position along its length, the lever 54 are constituted by a lug 57, in practice a rotary roller and the latter is freely engaged in a slide 58 which, for this purpose, carries vertically, that is to say perpendicular to its guide 35, the squeegee carriage 34.
  • the slide 58 which the squeegee carriage 34 thus presents is simply formed by two rules which this squeegee carriage carries parallel to each other 34 .
  • the engagement means that door thus adjustable in position along its length this lever 60 are constituted by a lug 61, and in practice a rotary roller and the latter is freely engaged in a slide 62 that the screen-carrying carriage 31 has for this purpose vertically, perpendicular to its guide 32.
  • the lever 60 is removable, so that it can be removed from the oscillating shaft 44.
  • the printing machine also comprises, in a manner known per se, a block 68, which, hereinafter for convenience, as a support block, is intended to successively intervene in isolation on each of the bottles 10 to be printed, and is capable, by pressing on the base 12 of such a bottle 10 to be printed, of controlling the angular orientation thereof around a transverse axis relative to the guides 32, 35 of the screen-carrying carriages 31 and squeegee holder 34, this transverse axis being that along which extend these vials 10 to be printed when they are carried, as described above, by the object-holding supports 16 on the core 29 of which they are engaged, and therefore being, in practice, the very axis of said vials 10 to be printed in the embodiment shown.
  • a block 68 which, hereinafter for convenience, as a support block, is intended to successively intervene in isolation on each of the bottles 10 to be printed, and is capable, by pressing on the base 12 of such a bottle 10 to be printed, of controlling the angular
  • such a support block 68 is conformed to the specific configuration of the base 12 of the vials 10 to be printed, so as to be able to engage at least partially on such a base 12, its corresponding leading edge preferably being chamfered to facilitate such engagement.
  • This support 69 is itself carried by a lever 71, and the latter is set in rotation on the oscillating shaft 44, and, more precisely, on the axially movable reciprocating part 44B thereof.
  • the support 69 and the lever 71 are split: the support 69 is formed of two blocks 69A, 69B and the lever 71 of two arms 71 A, 71 B; the arm 71A, which carries the block 69A, is axially fixed, being suitably rotatably mounted on the frame 13, by the bearing 45 of the oscillating shaft 44, while the arm 71B, which carries the block 69B, is wedged in rotation, while being adjustable in position; on the part 44B of the oscillating shaft 44, and is therefore, like this one, axially movable back and forth.
  • the shaft 70 carrying the support block 68 is axially wedged on the block 69B, and it is therefore wedged in rotation and wedged axially on the axially movable part 44B of the oscillating shaft 44, while, by a spline mounting , it slides axially sliding block 69A, while being locked in rotation thereon; in practice, this shaft 70 is also in two parts 70A, 70B, connected to each other by an elastic coupling 92.
  • the arm 71 B is doubled by an arm 90, which, parallel to the oscillating shaft 44, carries a finger 91, and which, by this finger 91, is engaged with the arm 71 A.
  • the support block 68 is locked in rotation on a lever 72 which, by engagement means adjustable in position along its length, meshes with a carriage 73, hereinafter said for convenience, control carriage, movably mounted on a guide 74 in synchronism with the squeegee carriage 34.
  • this control carriage 73 comprises two bars 76, which extend parallel to those 37, 41 constituting the guides 32, 35 of the screen-carrying carriage 31 and the squeegee carriage 34, and the guide 74 corresponding consists of two brackets 77, which, established parallel to each other, at a distance from each other, are integral with the frame 13, and are slidably traversed by said bars 76.
  • the lever 72 for controlling the support block 68 is locked in rotation on the shaft 70 carrying the latter, and the engagement means that door adjustable in position this lever 72 consist of a lug 79, in practice a rotary roller, freely engaged in a slide 80 carried for this purpose vertically, that is to say perpendicular to its bars 76, by the control carriage 73 concerned.
  • the rotary roller constituting the lug 79 is carried by a pin 81, which passes through a buttonhole 82 provided for this purpose longitudinally in the lever 72, with locking in position at any point thereof. ci by a nut 125, which, disposed on a first side of this lever 72, cooperates, in maintenance, with a head 83 established on the other side thereof.
  • the corresponding slide 80 of the control carriage 73 is formed between two rails 123 mounted vertically on a support block 124 secured to the bars 76 that this control carriage 73 comprises.
  • the squeegee carriage 34 and the control carriage 73 of the support block 68 each have, in parallel with one another, a slide.
  • the slide 58 For the squeegee carriage 34, it is the slide 58, extended sufficiently downward for this purpose; for the control carriage 73 of the support block 68, it is a slide 85, which for this purpose has this control carriage 73 vertically, parallel to its slide 80.
  • cranks 88, 89 For their engagement with their respective carriages, these cranks 88, 89 carry, as previously, a lug 93, 99, preferably consisting of a rotary roller.
  • R ′ The radius of the return member 20 from the conveyor 15 to the printing station 17, or radius of gyration of the circular path followed by the vials 10 to be printed when they are scrolled at the printing station, will be denoted by R ′ below. 17.
  • the radius of curvature R of the printing face 14 of the vials 10 concerned is equal to the radius of gyration R 'increased by the half thickness e / 2 of these bottles, e being their thickness.
  • the roller 57 constituting the engagement means adjustable in position carried by the lever 54 is disposed in line with the articulation 56 of this lever 54 on the frame 13.
  • the squeegee carriage 34 is therefore immobilized, and therefore also the control carriage 73.
  • the bottle 10 concerned then comes, by a generator of its face 14 to be printed, in contact with the screen 30, FIG. 5A.
  • the face 14 to be printed generally belonging to a cylindrical surface of radius R centered on the oscillating shaft 44 around which the gyration of the bottle 10 concerned takes place, the latter then develops without sliding on contact of the screen 39, FIG. 5B, while the squeegee 33 remains stationary at the right of its generator of contact with this screen 39, in the vertical plane, which, as shown diagrammatically in broken lines by its trace in the figures, passes through the axis of the return member 20.
  • the support block 68 applied to its base 12 firmly controls the orienta angular around its axis, which, as mentioned above, extends transversely with respect to the guides of the screen-carrier carriage 32 and of the squeegee-carriage 34, said axis being in practice that of said support block 68.
  • Such an adjustment can, for example, be made using an abacus suitably established for this purpose as a function of the possible radii of curvature.
  • the roller 79 is both close to the periphery of the return member 20 and to the vertical plane V passing through the axis of the latter, so that it is therefore located away from the plane passing through the axis of the support block 68, and the axis of the return member 20, and, jointly, the roller 57 is moved accordingly, above the shaft 56, for appropriate movement of the squeegee 33.
  • the squeegee carriage 34 then being movable in the same direction as the screen carrier 31, as indicated above, the way 10 to be printed then develops still properly in contact with the screen 30, as illustrated in FIGS. 6A, 6B, the roller 79 which in practice materializes the center of curvature of the face 14 to be printed moving parallel to the screen 30, in the same direction as the latter, but with a less stroke, and in synchronism with squeegee 33.
  • the bottle 10 during printing is jointly subjected to a slight rotational movement on itself, 'around its axis, under the control of the block d 'support 68, which controls the angular orientation around said axis at all times.
  • the squeegee carriage 34 and the screen carriage 31 then move in opposite directions relative to each other.
  • the support block 68 departs from the base 12 of such a bottle 10.
  • the oscillating shaft 44 then returns the support block 68 to its initial position, while jointly the screen 30 and the squeegee 33 also return to their initial position.
  • FIG. 8 illustrates the application of the printing machine according to the invention to the printing of bottles 10 of circular cross section.
  • the support block 68 is rotatably mounted in a support 69 which is itself carried by a lever 71 directly mounted oscillating on the frame 13, this lever 71 being locked in rotation on a shaft 44 mounted oscillating around its axis on said frame 13.
  • lever 72 on which the support block 68 is rotated is eliminated, this lever 72 being advantageously made for this removable purpose, according to the methods described above for the lever 60, and it is substituted therefor, according to methods, which, not forming part of the present invention, will not be described in detail here, a pinion 95.
  • This pinion 95 then meshes with a rack 96, which is fixed, being carried by the frame 13, and which is curved, being centered on the axis of the oscillating shaft 44.
  • the lever 60 intended for controlling the screen-carrying carriage 31 is locked in rotation on an auxiliary shaft 97, which is rotatably mounted in a bearing 98 integral with the frame 13, and on which a lever 99 'is locked in rotation.
  • this lever 99 By engagement means constituted in practice by a lug 101, and more precisely by a rotary roller, this lever 99 'meshes with a slide 100 provided for this purpose vertically on an auxiliary carriage 102, mounted movably on a guide parallel to the carriage squeegee holder 34, and in synchronism therewith.
  • this auxiliary carriage 102 is mounted movably on the bars 41 forming the guide 35 of the squeegee carriage 34.
  • the lever 48 also assumed to be sufficiently extended upward for this purpose, meshes with the slide 100 of the auxiliary carriage 102, for controlling the latter.
  • the screen-carrying carriage 31 is in this case movable back and forth in the opposite direction relative to the squeegee carriage 34, while being controlled by synchronism with it.
  • the support block 68 ensures at least partial rotation of the objects 10 to be printed on themselves during their printing, this block 68 being provided with this effect of a retractable lug which engages with a corresponding notch also provided for this purpose on the base 12 of such a bottle, according to methods well known in themselves.
  • the frame 39 of the screen 30 is mounted vertically movable on the carriage 31 which carries it, against springs 105, and it carries by gravity on a roller 106 disposed at the end of a lever 107 itself. - even locked in rotation on the oscillating shaft 44.
  • the screen and the squeegee should normally be preferably adjustable in height on the carriages which carry them.
  • printing stations can be provided, with, if desired, between them, other processing stations such as drying and / or steaming station.

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Description

La présente invention concerne d'une manière générale les machines à imprimer à l'écran de soie, et vise plus particulièrement celles destinées notamment, mais non exclusivement, à l'impression d'objets, flacons, par exemple, de section transversale ovale.The present invention relates generally to printing machines on the silk screen, and more particularly relates to those intended in particular, but not exclusively, for printing objects, bottles, for example, of oval cross section.

Ainsi qu'on le sait, une machine à imprimer à l'écran de soie comporte, d'une manière générale, à au moins un poste d'impression, d'une part un écran, formant pochoir, et d'autre part une raclette montée mobile transversalement par rapport à l'écran pour en être écartée lors de son mouvement de retour, entre deux impressions.As is known, a silk screen printing machine generally comprises, at least one printing station, on the one hand a screen, forming a stencil, and on the other hand a squeegee mounted movable transversely to the screen to be moved away from it during its return movement, between two impressions.

Le plus souvent, l'écran est porté par un chariot porte-écran monté mobile en va-et-vient sur un guide, et il en est de même pour la raclette.Most often, the screen is carried by a screen carriage mounted movable back and forth on a guide, and it is the same for the squeegee.

Le plus souvent également, la desserte du porte d'impression est assurée par un convoyeur, qui porte de place en place des supports porte-objet propres chacun au support d'un objet à imprimer, et qui est passé en boucle sans fin sur au moins deux organes de renvoi dont un au moins est moteur.Most often also, the service of the printing door is ensured by a conveyor, which carries from place to place specific object supports each to the support of an object to be printed, and which is passed in endless loop on the at least two return members of which at least one is a motor.

L'avance de ce convoyeur peut se faire pas à pas, l'impression des objets se faisant à tour de rôle lors de ses arrêts.The advance of this conveyor can be done step by step, the printing of objects being done in turn during its stops.

Mais elle peut également se faire de façon continue, et il a été proposé, à cet effet, de passer ce convoyeur sur un organe de renvoi circulaire au poste d'impression, en coopération avec des moyens d'entraînement en rotation qui, propres à successivement intervenir isolément sur chacun des objets à imprimer pour en assurer une rotation au moins partielle sur lui-même au cours de son impression, sont montés mobiles en va-et-vient entre deux positions extrêmes le long du convoyeur, de manière à pouvoir accompagner celui-ci sur une partie de son trajet, en synchronisme avec lui.But it can also be done continuously, and it has been proposed, for this purpose, to pass this conveyor on a circular return member to the printing station, in cooperation with rotation drive means which, suitable for successively intervene in isolation on each of the objects to be printed to ensure at least a partial rotation thereof on itself during its printing, are mounted to move back and forth between two extreme positions along the conveyor, so as to be able to accompany this one on part of its path, in synchronism with it.

Ainsi, lors de son impression, chacun des objets concernés se déplace alors suivant un trajet circulaire, dont le rayon, dit ci-après par commodité rayon de giration, est égal à celui de l'organe de renvoi correspondant du convoyeur.Thus, when it is printed, each of the objects concerned then moves along a circular path, the radius of which, hereinafter said for convenience, radius of gyration, is equal to that of the corresponding return member of the conveyor.

Une telle disposition convient bien à l'impression d'objets de section transversale cylindrique.Such an arrangement is well suited for printing objects of cylindrical cross section.

Il suffit, en effet, que le bloc rotatif que comportent de manière usuelle, pour application à un objet à imprimer, les moyens d'entraînement en rotation prévus pour assurer une rotation au moins partielle sur lui-même d'un tel objet au cours de son impression, dit ci-après par commodité bloc d'appui, soit calé sur un pignon engrenant lui-même avec une crémaillère fixe cintrée au rayon de giration correspondant et que conjointement, l'écran soit l'objet, transversalement à son trajet, d'un mouvement compensateur à l'image de celui d'un tel objet.It suffices, in fact, that the rotary block that usually comprise, for application to an object to be printed, the rotational drive means provided to ensure at least partial rotation on itself of such an object during of its impression, hereinafter said for convenience, support block, is wedged on a pinion meshing itself with a fixed rack bent at the corresponding radius of gyration and that jointly, the screen is the object, transverse to its path , of a compensating movement like that of such an object.

Elle ne convient pas, par contre, sans autres, pour les objets dont la section transversale est ovale, sauf dans le cas, ponctuel, où le rayon de courbure de la face à imprimer d'un tel objet, est rigoureusement égal au rayon de giration, augmenté de sa demi-épaisseur.It is not suitable, on the other hand, without others, for objects whose cross section is oval, except in the case, punctual, where the radius of curvature of the print side of such an object, is strictly equal to the radius of gyration, increased by its half thickness.

En effet, dans un tel cas, tout se passe comme si cette face appartenait à un cylindre centré sur l'axe de l'organe de renvoi correspondant au convoyeur, dit ci-après par commodité axe de giration, et l'objet concerné peut dès lors se développer de manière convenable par cette face au contact de l'écran, par simple roulement contre celui-ci, sans même de rotation sur lui-même, le bloc d'appui associé en assurant simplement le contrôle de l'orientation angulaire autour de son axe, et sans même de mouvement compensateur de l'écran transversalement à son trajet, la raclette restant conjointement au droit dudit axe de giration.Indeed, in such a case, everything happens as if this face belonged to a cylinder centered on the axis of the return member corresponding to the conveyor, hereinafter said for convenience axis of gyration, and the object concerned can therefore develop suitably by this face in contact with the screen, by simple rolling against it, without even rotating on itself, the associated support block by simply ensuring the control of the angular orientation around its axis, and without even a compensating movement of the screen transversely to its path, the squeegee remaining jointly at the right of said axis of gyration.

Mais il n'en est pas de même si le rayon de courbure de la face à imprimer de l'objet de section transversale ovale considéré est supérieur ou inférieur à son rayon de giration augmenté de sa demi-épaisseur.But it is not the same if the radius of curvature of the print side of the object of oval cross-section considered is greater or less than its radius of gyration increased by its half thickness.

Or, d'un objet à un autre, ce rayon de courbure varie.However, from one object to another, this radius of curvature varies.

Il faudrait donc, à chaque fois, modifier le rayon de giration d'un objet pour l'adapter à son rayon de courbure.It would therefore be necessary, each time, to modify the radius of gyration of an object to adapt it to its radius of curvature.

En pratique, dans les machines à imprimer à l'écran de soie adaptées à ce jour au traitement d'objets de section transversale ovale et équipées d'un convoyeur à avance continue pour le transport de ces objets, il faut, pour passer d'un objet de rayon de courbure déterminé à un objet de rayon de cdurbure différent, procéder au changement de divers organes spécifiquement adaptés au rayon de courbure des objets à traiter (cf. par exemple US-A-4 122 768).In practice, in silk screen printing machines adapted to date for the treatment of objects of oval cross section and equipped with a continuous advance conveyor for the transport of these objects, it is necessary, to pass from an object with a determined radius of curvature to an object with a different radius of curvature, proceed to changing various members specifically adapted to the radius of curvature of the objects to be treated (cf. for example US-A-4,122,768).

Il en résulte des réalisations relativement complexes et coûteuses, nécessitant de surcroît des temps de réglage relativement longs.This results in relatively complex and costly embodiments, requiring moreover relatively long adjustment times.

C'est pourquoi, le plus souvent, à ce jour, les machines à imprimer à l'écran de soie adaptées au traitement d'objets de section transversale ovale sont équipées de convoyeurs à avance discontinue, avec les limites qui en résultent pour leur cadence de production.This is why, most often, to date, silk screen printing machines suitable for processing objects of oval cross section are equipped with conveyors with discontinuous advance, with the resulting limits for their rate of production.

La présente invention a d'une manière générale pour objet une disposition permettant de manière relativement simple de surmonter ces difficultés, et susceptible notamment d'être adaptée relativement aisément à l'impression d'objets de section transversale ovale de rayons de courbure différents, tout en étant équipée d'une convoyeur à avance continue.A general object of the present invention is a provision making it relatively simple to overcome these difficulties, and capable in particular of being relatively easily adapted to printing objects of oval cross section with different radii of curvature, all by being equipped with a continuous advance conveyor.

De manière plus précise, la présente invention a pour objet une machine à imprimer à l'écran de soie, du genre comportant, pour la desserte d'au moins un poste d'impression, un convoyeur portant au moins un, et en pratique, de place en place, une pluralité de supports porte-objet propres chacun au support d'un objet à imprimer, et, audit poste d'impression, un écran, qui est porté par un chariot porte-écran monté mobile en va-et-vient sur un guide, une raclette, qui est portée par un chariot porte-raclette monté mobile en va-et-vient sur un guide parallèle au précédent, et un bloc, qui, dit ci-après par commodité bloc d'appui, est susceptible, par appui sur l'objet à imprimer, d'en contrôler l'orientation angulaire autour d'un axe transversale par rapport aux guides du chariot porte-écran et du chariot porte-raclette, cette machine étant d'une manière générale caractérisée en ce que ledit bloc d'appui est calé en rotation sur un levier qui, par des moyens d'engagement réglables en position suivant sa longueur, engrène avec un chariot de commande monté mobile sur un guide en synchronisme avec le chariot porte-raclette.More specifically, the present invention relates to a silk screen printing machine, of the type comprising, for serving at least one printing station, a conveyor carrying at least one, and in practice, from place to place, a plurality of object-holder supports each suitable for supporting an object to be printed, and, at said printing station, a screen, which is carried by a screen-holder carriage mounted movable back and forth comes on a guide, a squeegee, which is carried by a squeegee carriage mounted movable back and forth on a guide parallel to the previous one, and a block, which, hereinafter said for convenience, support block, is likely, by pressing on the object to be printed, to control the angular orientation around a transverse axis with respect to the guides of the screen carrier carriage and the squeegee carriage, this machine being generally characterized in that said support block is locked in rotation on a lever which, by engagement means adjustable in position along its length, meshes with a control carriage mounted to move on a guide in synchronism with the squeegee carriage.

En pratique, de tels moyens d'engagement sont simplement constitués par un ergot, un galet par exemple, librement engagé dans une glissière que porte à cet effet le chariot concerné.In practice, such engagement means are simply constituted by a lug, a roller for example, freely engaged in a slide that carries for this purpose the carriage concerned.

Quoi qu'il en soit, de tels moyens d'engagement matérialisent, suivant l'invention, le centre de courbure de la face à imprimer des objets de section transversale ovale concernés.Anyway, such engagement means materialize, according to the invention, the center of curvature of the face to print objects of oval cross section concerned.

Il suffit, dès lors, suivant le rayon de courbure de ladite face, d'ajuster en conséquence la position, sur le levier qui les porte, des moyens d'engagement permettant à ce levier d'engrener avec son chariot de commande, et de décaler latéralement de manière convenable, ces moyens d'engagement.It suffices, therefore, along the radius of curvature of said face, to adjust the position accordingly, on the lever which carries them, engagement means allowing this lever to mesh with its control carriage, and laterally shift these engagement means in a suitable manner.

En effet, cette adaptation qui est aisée et rapide à conduire, étant faite, chacun des objets à imprimer peut, comme précédemment, se développer par sa face correspondante au contact de l'écran de soie lors du déplacement de celui-ci avec un léger mouvement de rotation sur lui-même.Indeed, this adaptation which is easy and quick to drive, being made, each of the objects to be printed can, as previously, develop by its corresponding face in contact with the silk screen during the displacement thereof with a slight rotational movement on itself.

En pratique, la présente invention convient tout particuliérement au cas où, au poste d'impression, le convoyeur, qui est à avance continue, passe sur un organe de renvoi circulaire.In practice, the present invention is particularly suitable for the case where, at the printing station, the conveyor, which is in continuous advance, passes over a circular return member.

En combinant alors au mouvement de giration correspondant des objets à imprimer autour de l'axe de cet organe de renvoi le mouvement de rotation sur eux-mêmes de ces objets au cours de leur impression, la machine suivant l'invention permet l'obtention d'un mouvement de contact linéaire entre de tels objets et l'écran de soie, garant d'une bonne impression pour ces objets.By then combining with the corresponding turning movement of the objects to be printed around the axis of this deflection member the rotary movement on themselves of these objects during their printing, the machine according to the invention makes it possible to obtain '' a movement of linear contact between such objects and the silk screen, guaranteeing a good impression for these objects.

Enfin, si désiré, la machine à imprimer suivant l'invention peut, non seulement convenir à l'impression d'objets à imprimer de section trans- vérsale ovale, quel que soit, dans une large gamme, le rayon de courbure de la face à imprimer de ceux-ci, mais encore convenir, moyennant une adaptation rapide et aisée, à l'impression d'objets de section transversale circulaire.Finally, if desired, the printing machine according to the invention can not only be suitable for printing objects to be printed with an oval transverse section, whatever, within a wide range, the radius of curvature of the face. to print them, but still be suitable, with rapid and easy adaptation, for printing objects of circular cross section.

Les caractéristiques et avantages de l'invention ressortiront d'ailleurs de la description qui va suivre, à titre d'exemple, en référence aux dessins schématiques annexés sur lesquels :

  • la figure 1 est une vue en perspective illustrant pour l'essentiel de manière schématique, les divers composants mobiles d'une machine à imprimer suivant l'invention ;
  • la figure 2 est une vue partielle en coupe de cette machine, suivant la ligne II-II de la figure 1 ;
  • la figure 3 en est une autre vue en coupe partielle, suivant la ligne III-III de la figure 2 ;
  • la figure 4 en est une autre vue en coupe partielle, suivant la ligne IV-IV de la figure 3 ;
  • les figures 5A, 5B sont des diagrammes illustrant le fonctionnement de la machine à imprimer suivant l'invention pour un objet à imprimer de section transversale ovale de rayon de courbure déterminé ;
  • les figures 6A, 6B, d'une part, et 7A, 7B, d'autre part, sont, chacune respectivement, des vues analogues à celles des figures 5A, 5B, et illustrent l'adaptation de la machine à imprimer suivant l'invention à des objets à imprimer de section transversale ovale de rayons de courbure différents ;
  • la figure 8 est une vue analogue à celle de la figure 1, pour une adaptation de la machine à imprimer suivant l'invention à l'impression d'objets de section transversale circulaire.
The characteristics and advantages of the invention will become apparent from the description which follows, by way of example, with reference to the appended schematic drawings in which:
  • Figure 1 is a perspective view essentially illustrating schematically, the various movable components of a printing machine according to the invention;
  • Figure 2 is a partial sectional view of this machine, along the line II-II of Figure 1;
  • Figure 3 is another partial sectional view along line III-III of Figure 2;
  • Figure 4 is another partial sectional view along the line IV-IV of Figure 3;
  • FIGS. 5A, 5B are diagrams illustrating the operation of the printing machine according to the invention for an object to be printed with an oval cross section of determined radius of curvature;
  • FIGS. 6A, 6B, on the one hand, and 7A, 7B, on the other hand, are, each respectively, views similar to those of FIGS. 5A, 5B, and illustrate the adaptation of the printing machine according to the invention for printing objects of oval cross section with different radii of curvature;
  • Figure 8 is a view similar to that of Figure 1, for an adaptation of the printing machine according to the invention for printing objects of circular cross section.

Les figures 1 à 7 illustrent l'application de l'invention à l'impression de flacons de section transversale ovale 10.FIGS. 1 to 7 illustrate the application of the invention to the printing of bottles of oval cross section 10.

Il s'agit, en pratique, de flacons réalisés en matière synthétique.In practice, these are bottles made of synthetic material.

Quoi qu'il en soit, un tel flacon 10 comporte, globalement, un goulot 11 et un culot 12.Be that as it may, such a bottle 10 comprises, overall, a neck 11 and a base 12.

Par simplicité, la face 14 à imprimer d'un tel flacon 10, ou au moins la portion médiane de cette face destinée réellement à recevoir une impression, sera assimilée ici à une portion de surface cylindrique de rayon R.For simplicity, the face 14 to be printed of such a bottle 10, or at least the middle portion of this face actually intended to receive an impression, will be assimilated here to a portion of cylindrical surface of radius R.

La machine à imprimer suivant l'invention comporte, bien entendu, un bâti, dont la réalisation relève de l'homme de l'art, et ne sera donc pas décrite en détail ici.The printing machine according to the invention comprises, of course, a frame, the production of which is within the skill of the art, and will therefore not be described in detail here.

Par simplicité, ceux des éléments constitutifs de ce bâti qui ont été représentés ou schématisés sur les figures, y ont tous été repérés par la même référence générale 13.For simplicity, those of the constituent elements of this frame which have been represented or shown diagrammatically in the figures, have all been identified there by the same general reference 13.

Globalement, et de manière connue en soi, la machine à imprimer suivant l'invention comporte, pour la desserte d'au moins un poste d'impression 17, détaillé ci-après, un convoyeur 15, qui porte au moins un support porte-objet 16 propre au support d'un flacon 10 à imprimer, et, en pratique, de place en place, une pluralité de tels supports porte-objet 16 propres chacun au support d'un tel flacon 10 à imprimer.Overall, and in a manner known per se, the printing machine according to the invention comprises, for serving at least one printing station 17, detailed below, a conveyor 15, which carries at least one support object 16 specific to the support of a bottle 10 to be printed, and, in practice, from place to place, a plurality of such object-holder supports 16 each suitable for the support of such a bottle 10 to be printed.

Un tel convoyeur 15 n'a été que partiellement et schématiquement représenté sur les figures.Such a conveyor 15 has only been partially and schematically shown in the figures.

Il s'agit, par exemple, de deux chaînes 18, qui s'étendent parallèlement l'une à l'autre, et entre lesquelles sont établis, de place en place, en substitution à leurs maillons, les supports porte-objet 16.These are, for example, two chains 18, which extend parallel to one another, and between which are established, from place to place, in substitution for their links, the object-holding supports 16.

Seuls certains de ces derniers ont été représentés sur les figures.Only some of these have been shown in the figures.

Le convoyeur 15 ainsi constitué est en pratique un convoyeur sans fin passé en boucle sur au moins deux organes de renvoi, dont un au moins est moteur.The conveyor 15 thus formed is in practice an endless conveyor passed in a loop on at least two return members, at least one of which is motor.

En pratique, dans la forme de réalisation représentée, le convoyeur 15 passe ainsi sur un organe de renvoi 20 au poste d'impression 17, et, de préférence, tel que représenté, celui-ci est circulaire.In practice, in the embodiment shown felt, the conveyor 15 thus passes over a return member 20 to the printing station 17, and, preferably, as shown, it is circular.

Il s'agit, par exemple, d'une roue dentée montée rotative sur le bâti 13 et présentant de place en place, à sa périphérie, des évidements propres au passage des supports porte-objet 16.It is, for example, a toothed wheel rotatably mounted on the frame 13 and having from place to place, at its periphery, recesses suitable for the passage of the object-holder supports 16.

De part et d'autre de cet organe de renvoi 20, et à un niveau inférieur, deux autres organes de renvoi 21 sont prévus, pour application du convoyeur 15 à l'organe de renvoi 20 suivant la demi-circonférence supérieure de celui-ci.On either side of this return member 20, and at a lower level, two other return members 21 are provided, for application of the conveyor 15 to the return member 20 along the upper half-circumference thereof. .

Les organes de renvoi 21 sont par exemple des roues dentées montées rotatives sur le bâti 13, comme l'organe de renvoi 20.The return members 21 are for example toothed wheels rotatably mounted on the frame 13, like the return member 20.

Bien entendu, pour la fermeture en boucle sur lui-même du convoyeur 15, d'autres organes de renvoi sont prévus, qui n'ont pas été représentés sur les figures.Of course, for the loop closure on itself of the conveyor 15, other return members are provided, which have not been shown in the figures.

Comme mentionné ci-dessus, l'un quelconque des organes de renvoi 20, 21 est moteur.As mentioned above, any of the return members 20, 21 is motor.

Il peut s'agir, par exemple de l'organe de renvoi 20, celui-ci étant calé en rotation, éventuellement par une quelconque transmission, sur l'arbre de sortie d'un moto-réducteur 25 schématisé en traits interrompus sur la figure 1.It may be, for example the return member 20, this being locked in rotation, possibly by any transmission, on the output shaft of a geared motor 25 shown diagrammatically in broken lines in the figure 1.

Quoi qu'il en soit, les moyens de commande ainsi prévus pour l'entraînement en rotation de l'organe de renvoi moteur du convoyeur 15 sont propres à en assurer une rotation continue.Anyway, the control means thus provided for the rotational drive of the engine return member of the conveyor 15 are adapted to ensure continuous rotation.

Ainsi, le convoyeur 15 est à avance continue.Thus, the conveyor 15 is in continuous advance.

Dans la forme de réalisation schématiquement représentée, chaque support porte-objet 16 comporte un corps tubulaire 27, qui, par des oreilles latérales 28, est articulé, à la manière d'un maillon, aux chaînes 18 constituant le convoyeur 15, et qui porte en saillie un noyau 29, sur lequel un flacon 10 à imprimer peut être engagé par son col 11.In the embodiment shown diagrammatically, each object support 16 comprises a tubular body 27, which, by lateral ears 28, is articulated, in the manner of a link, to the chains 18 constituting the conveyor 15, and which carries projecting a core 29, on which a bottle 10 to be printed can be engaged by its neck 11.

Un tel support porte-objet 16 ne faisant pas partie par lui-même de la présente invention, il ne sera pas décrit plus en détail ici.Such an object holder 16 not being in itself part of the present invention, it will not be described in more detail here.

Il suffira de préciser que, de préférence, le noyau 29 qu'il comporte est équipé d'un organe de maintien propre à assurer, par application contre la paroi interne du goulot 11 du flacon 10 à imprimer engagé sur lui, un maintien ferme d'un tel flacon 10.It will suffice to specify that, preferably, the core 29 which it comprises is equipped with a holding member capable of ensuring, by application against the internal wall of the neck 11 of the bottle 10 to be printed engaged on it, a firm holding of such a bottle 10.

Quoi qu'il en soit, lorsqu'ils sont ainsi portés par des supports porte-objet 16, les flacons 10 à imprimer s'étendent transversalement par rapport au déplacement longitudinal du convoyeur 15, c'est-à-dire parallèlement aux axes des organes de renvoi 20, 21 de celui-ci.Anyway, when they are thus carried by object holders 16, the vials 10 to be printed extend transversely relative to the longitudinal displacement of the conveyor 15, that is to say parallel to the axes of the return members 20, 21 thereof.

Au poste d'impression 17, la machine à imprimer suivant l'invention comporte, d'une part, un écran de soie 30, formant pochoir, porté par un chariot 31, dit ci-après chariot porte-écran, qui est monté mobile longitudinalement en va-et-vient sur un guide 32, et, d'autre part, une raclette 33, portée par un chariot 34, qui est également monté mobile longitudinalement en va-et-vient sur un guide 35, parallèle au précédent.At the printing station 17, the printing machine according to the invention comprises, on the one hand, a silk screen 30, forming a stencil, carried by a carriage 31, referred to below as a screen-carrying carriage, which is mounted movable longitudinally back and forth on a guide 32, and, on the other hand, a squeegee 33, carried by a carriage 34, which is also mounted movable longitudinally back and forth on a guide 35, parallel to the previous one.

Dans la forme de réalisation représentée sur les figures 1 à 7, le guide 32 du chariot porte-écran 31 est constitué par deux barres parallèles 37, qui courent d'un élément constitutif du bâti 13 à un autre, parallèlement au convoyeur 15.In the embodiment shown in FIGS. 1 to 7, the guide 32 of the screen-carrying carriage 31 consists of two parallel bars 37, which run from one component of the frame 13 to another, parallel to the conveyor 15.

De manière schématique, le chariot porte-écran 31 comporte un cadre 39, pour support de l'écran 30, et deux blocs 40, qui, engagés à coulissement sur les barres 37 constituant le guide 32 associé, portent le cadre 39.Schematically, the screen-carrying carriage 31 includes a frame 39, for supporting the screen 30, and two blocks 40, which, slidably engaged on the bars 37 constituting the associated guide 32, carry the frame 39.

Bien entendu, et de manière connue en soi, le montage de l'écran 30 sur son chariot 31 peut en fait se faire de manière à permettre un relevage de l'écran 30 par rapport au convoyeur 15 en cas de nécessité, par exemple sous la commande d'un vérin.Of course, and in a manner known per se, the mounting of the screen 30 on its carriage 31 can in fact be done so as to allow the screen 30 to be raised relative to the conveyor 15 if necessary, for example under the control of a cylinder.

Dans la forme de réalisation représentée, le guide 35 du chariot porte raclette 34 est constitué de trois barres parallèles 41, qui courent d'un élément constitutif du bâti 13 à un autre, parallèlement au convoyeur 15, et donc parallèlement aux barres 37 constituant le guide 32 du chariot porte-écran 31.In the embodiment shown, the guide 35 of the squeegee carriage 34 consists of three parallel bars 41, which run from one component of the frame 13 to another, parallel to the conveyor 15, and therefore parallel to the bars 37 constituting the guide 32 of the screen carriage 31.

La raclette 33 elle-même, qui s'étend transversalement par rapport au guide 35 de son chariot 34, est portée par un bras 43 solidaire de ce dernier.The squeegee 33 itself, which extends transversely relative to the guide 35 of its carriage 34, is carried by an arm 43 integral with the latter.

Bien entendu, et de manière connue en soi, la raclette 33 est montée mobile transversalement par rapport à l'écran 30, pour pouvoir en être écartée lors de son mouvement de retour consécutif à une impression.Of course, and in a manner known per se, the squeegee 33 is mounted movable transversely with respect to the screen 30, in order to be able to be moved away from it during its return movement following printing.

En outre, comme précédemment, son montage sur le chariot 34 qui la porte peut faire intervenir des moyens propres à en permettre un relevage en cas de nécessité, sous la commande par exemple d'un vérin.In addition, as before, its mounting on the carriage 34 which carries it can involve means suitable for allowing it to be lifted if necessary, under the control for example of a jack.

De manière connue en soi, le chariot porte-écran 31 est commandé en synchronisme avec le chariot porte-raclette 34, à partir d'un arbre rotatif 44, qui, dit ci-après arbre oscillant, est coaxial de l'organe de renvoi 20 et qui, en synchronisme avec le chariot porte-écran 31 et le chariot porte-raclette 34 est monté oscillant autour de son axe, entre deux paliers 45 solidaires du bâti 13, sous la commande d'une came rotative 46 calée en rotation, éventuellement par l'intermédiaire d'une quelconque transmission appropriée, sur l'arbre de sortie du moto-réducteur 25.In a manner known per se, the screen carriage 31 is controlled in synchronism with the squeegee carriage 34, from a rotary shaft 44, which, hereinafter said oscillating shaft, is coaxial with the return member 20 and which, in synchronism with the screen carriage 31 and the squeegee carriage 34 is mounted oscillating about its axis, between two bearings 45 integral with the frame 13, under the control of a rotary cam 46 locked in rotation, possibly via any suitable transmission, on the output shaft of the gear motor 25.

A cet effet, dans la forme de réalisation représentée, sur l'arbre oscillant 44 est calé un levier 48, qui, par des moyens d'engagement, en pratique un galet 49, engrène avec une piste 50 de la came 46, établie sur une face de celle-ci perpendiculaire à son axe de rotation.For this purpose, in the embodiment shown, on the oscillating shaft 44 is wedged a lever 48, which, by engagement means, in practice a roller 49, meshes with a track 50 of the cam 46, established on a face thereof perpendicular to its axis of rotation.

En pratique, et pour des raisons qui apparaîtront ci-après l'arbre oscillant 44 est en deux parties 44A, 44B, qui engrènent l'une avec l'autre par un montage à cannelures établi entre, d'une part, la partie 44A, et d'autre part, un manchon 52 sur lequel est calé en rotation la partie 44B ; alors que la partie 44A qui est celle portant le levier 48, est axialement fixe, la partie 44B est axialement mobile en va-et-vient, le manchon 52 sur lequel elle est calée engrenant par exemple à cet effet, suivant des modalités qui sont bien connues en elles-mêmes et qui ne sont pas visibles sur les figures, avec une came rotative calée en rotation sur l'arbre de sortie du moto-réducteur 25, la piste correspondante de cette came étant par exemple établie dans ce cas sur la tranche de celle-ci.In practice, and for reasons which will appear hereinafter the oscillating shaft 44 is in two parts 44A, 44B, which mesh with one another by a grooved assembly established between, on the one hand, the part 44A , and on the other hand, a sleeve 52 on which the part 44B is rotated; while the part 44A which is the one carrying the lever 48, is axially fixed, the part 44B is axially movable back and forth, the sleeve 52 on which it is wedged meshing for example for this purpose, according to methods which are well known in themselves and which are not visible in the figures, with a rotary cam locked in rotation on the output shaft of the gear motor 25, the corresponding track of this cam being for example established in this case on the edge of that -this.

Dans la forme de réalisation représentée, le levier 48 forme l'un des côtés d'un parallélogramme déformable dont le côté opposé est constitué par un levier 54, et ce dernier, par des moyens d'engagement réglables en position suivant sa longueur, engrène avec le chariot porte-raclette 34.In the embodiment shown, the lever 48 forms one of the sides of a deformable parallelogram whose opposite side is constituted by a lever 54, and the latter, by engagement means adjustable in position along its length, meshes with the squeegee trolley 34.

En pratique, les leviers 48 et 54 sont reliés l'un à l'autre par une bielle 55 articulée à chacun d'eux, et le levier 54 est calé sur un arbre 56 monté rotatif dans un palier 53 solidaire du bâti 13.In practice, the levers 48 and 54 are connected to each other by a connecting rod 55 articulated to each of them, and the lever 54 is wedged on a shaft 56 rotatably mounted in a bearing 53 integral with the frame 13.

Suivant des modalités qui seront décrites plus en détail ci-après pour d'autres moyens d'engagement, les moyens d'engagement que porte réglables en position suivant sa longueur le levier 54 sont constitués par un ergot 57, en pratique un galet rotatif et celui-ci est librement engagé dans une glissière 58 que porte, à cet effet, verticalement, c'est-à-dire perpendiculairement à son guide 35, le chariot porte-raclette 34.According to methods which will be described in more detail below for other engagement means, the engagement means which door adjustable in position along its length, the lever 54 are constituted by a lug 57, in practice a rotary roller and the latter is freely engaged in a slide 58 which, for this purpose, carries vertically, that is to say perpendicular to its guide 35, the squeegee carriage 34.

Suivant des modalités également décrites plus en détail ci-après pour une autre glissière, la glissière 58 que présente ainsi le chariot porte-raclette 34 est simplement formée par deux règles que porte parallèlement l'une à l'autre ce chariot porte-raclette 34.According to methods also described in more detail below for another slide, the slide 58 which the squeegee carriage 34 thus presents is simply formed by two rules which this squeegee carriage carries parallel to each other 34 .

Dans la forme de réalisation représentée sur les figures 1 à 7, sur l'arbre oscillant 44 se trouve par ailleurs calé un levier 60, qui, par des moyens d'engagement réglables en position suivant sa longueur, engrène directement avec le chariot porte-écran 31.In the embodiment shown in Figures 1 to 7, on the oscillating shaft 44 is also wedged a lever 60, which, by means of engagement adjustable in position along its length, meshes directly with the carriage screen 31.

Suivant des modalités de même type que celles mentionnées ci-dessus, les moyens d'engagement que porte ainsi réglables en position suivant sa longueur ce levier 60 sont constitués par un ergot 61, et en pratique un galet rotatif et celui-ci est librement engagé dans une glissière 62 que présente à cet effet verticalement le chariot porte-écran 31, perpendiculairement à son guide 32.According to methods of the same type as those mentioned above, the engagement means that door thus adjustable in position along its length this lever 60 are constituted by a lug 61, and in practice a rotary roller and the latter is freely engaged in a slide 62 that the screen-carrying carriage 31 has for this purpose vertically, perpendicular to its guide 32.

De préférence, et pour des raisons qui apparaîtront ci-après, le levier 60 est démontable, de manière à pouvoir être retiré de l'arbre oscillant 44.Preferably, and for reasons which will appear below, the lever 60 is removable, so that it can be removed from the oscillating shaft 44.

Par exemple, il est engagé sur cet arbre oscillant 44, et, plus précisément, sur la partie axialement fixe 44A de celui-ci, par une fourchette 64 qu'une mâchoire amovible 65 vient refermer sur ledit arbre 44, ladite mâchoire 65 étant par exemple rapportée à cet effet par des vis 66 sur ladite fourchette 64, et étant de préférence établie au droit d'un méplat dudit arbre 44.For example, it is engaged on this oscillating shaft 44, and, more precisely, on the axially fixed part 44A thereof, by a fork 64 which a removable jaw 65 comes to close on said shaft 44, said jaw 65 being by example reported for this purpose by screws 66 on said fork 64, and preferably being established in line with a flat portion of said shaft 44.

Quoi qu'il en soit, et ainsi qu'on le notera, il résulte de ce qui précède que, dans la forme de réalisation représentée sur les figures 1 à 7, le chariot porte-écran 31 et le chariot porte-raclette 34 sont l'un et l'autre, sous la commande de l'arbre oscillant 44, mobiles dans le même sens sur leurs guides respectifs 32, 35, lorsque, comme représenté sur la figure 1, le galet constituant l'ergot 57 se trouve au-dessus de l'arbre 56.Anyway, and as will be noted, it follows from the above that, in the embodiment shown in Figures 1 to 7, the screen carriage 31 and the squeegee carriage 34 are both under the control of the oscillating shaft 44, movable in the same direction on their respective guides 32, 35, when, as shown in Figure 1, the roller constituting the lug 57 is located above tree 56.

Au poste d'impression 17, la machine à imprimer suivant l'invention comporte encore, de manière connue en soi, un bloc 68, qui, ci-après par commodité bloc d'appui, est destiné à successivement intervenir isolément sur chacun des flacons 10 à imprimer, et est susceptible, par appui sur le culot 12 d'un tel flacon 10 à imprimer, d'en contrôler l'orientation angulaire autour d'un axe transversal par rapport aux guides 32, 35 des chariots porte-écran 31 et porte-raclette 34, cet axe transversal étant celui suivant lequel s'étendent ces flacons 10 à imprimer lorsqu'ils sont portés, comme décrit ci-dessus, par les supports porte-objet 16 sur le noyau 29 desquels ils sont engagés, et étant donc, en pratique, l'axe même desdits flacons 10 à imprimer dans la forme de réalisation représentée.At the printing station 17, the printing machine according to the invention also comprises, in a manner known per se, a block 68, which, hereinafter for convenience, as a support block, is intended to successively intervene in isolation on each of the bottles 10 to be printed, and is capable, by pressing on the base 12 of such a bottle 10 to be printed, of controlling the angular orientation thereof around a transverse axis relative to the guides 32, 35 of the screen-carrying carriages 31 and squeegee holder 34, this transverse axis being that along which extend these vials 10 to be printed when they are carried, as described above, by the object-holding supports 16 on the core 29 of which they are engaged, and therefore being, in practice, the very axis of said vials 10 to be printed in the embodiment shown.

En pratique, un tel bloc d'appui 68 est conformé à la configuration propre du culot 12 des flacons 10 à imprimer, de manière à pouvoir s'engager au moins partiellement sur un tel culot 12, son bord d'attaque correspondant étant de préférence chanfreiné pour en faciliter un tel engagement.In practice, such a support block 68 is conformed to the specific configuration of the base 12 of the vials 10 to be printed, so as to be able to engage at least partially on such a base 12, its corresponding leading edge preferably being chamfered to facilitate such engagement.

Un tel bloc d'appui 68 étant bien connu par lui-même, et ne faisant pas, en soi, partie de la présente invention, il ne sera pas décrit plus en détail ici.Such a support block 68 being well known in itself, and not being, per se, part of the present invention, it will not be described in more detail here.

Il suffira d'indiquer qu'il est porté par un support 69, tout en étant monté rotatif par rapport à celui-ci.It will suffice to indicate that it is carried by a support 69, while being rotatably mounted with respect thereto.

A cet effet, il est en pratique porté par un arbre 70 monté rotatif dans ledit support 69, tel qu'il est visible en détail à la figure 2.To this end, it is in practice carried by a shaft 70 rotatably mounted in said support 69, as shown in detail in FIG. 2.

Ce support 69 est lui-même porté par un levier 71, et celui-ci est calé en rotation sur l'arbre oscillant 44, et, plus précisément, sur la partie axialement mobile en va-et-vient 44B de celui-ci.This support 69 is itself carried by a lever 71, and the latter is set in rotation on the oscillating shaft 44, and, more precisely, on the axially movable reciprocating part 44B thereof.

En pratique, dans la forme de réalisation plus particulièrement représentée sur la figure 2, le support 69 et le levier 71 sont dédoublés : le support 69 est formé de deux blocs 69A, 69B et le levier 71 de deux bras 71 A, 71 B ; le bras 71A, qui porte le bloc 69A, est axialement fixe, en étant monté convenablement rotatif sur le bâti 13, par le palier 45 de l'arbre oscillant 44, tandis que le bras 71B, qui porte le bloc 69B, est calé en rotation, tout en étant réglable en position; sur la partie 44B de l'arbre oscillant 44, et est donc, comme celle-ci , axialement mobile en va-et-vient. L'arbre 70 portant le bloc d'appui 68 est calé axialement sur le bloc 69B, et il est donc calé en rotation et calé axialement sur la partie axialement mobile 44B de l'arbre oscillant 44, tandis que, par un montage à cannelures, il traverse axialement à coulissement le bloc 69A, tout en étant calé en rotation sur celui-ci ; en pratique cet arbre 70 est lui aussi en deux parties 70A, 70B, reliées l'une à l'autre par un accouplement élastique 92. Enfin, pour l'entraînement du bras 71A, le bras 71 B est doublé par un bras 90, qui, parallèlement à l'arbre oscillant 44, porte un doigt 91, et qui, par ce doigt 91, est en prise avec le bras 71 A.In practice, in the embodiment more particularly shown in FIG. 2, the support 69 and the lever 71 are split: the support 69 is formed of two blocks 69A, 69B and the lever 71 of two arms 71 A, 71 B; the arm 71A, which carries the block 69A, is axially fixed, being suitably rotatably mounted on the frame 13, by the bearing 45 of the oscillating shaft 44, while the arm 71B, which carries the block 69B, is wedged in rotation, while being adjustable in position; on the part 44B of the oscillating shaft 44, and is therefore, like this one, axially movable back and forth. The shaft 70 carrying the support block 68 is axially wedged on the block 69B, and it is therefore wedged in rotation and wedged axially on the axially movable part 44B of the oscillating shaft 44, while, by a spline mounting , it slides axially sliding block 69A, while being locked in rotation thereon; in practice, this shaft 70 is also in two parts 70A, 70B, connected to each other by an elastic coupling 92. Finally, for driving the arm 71A, the arm 71 B is doubled by an arm 90, which, parallel to the oscillating shaft 44, carries a finger 91, and which, by this finger 91, is engaged with the arm 71 A.

En pratique, au poste d'impression 17, sont en outre prévues, sur le bâti 13, des glissières fixes, entre lesquelles, en arrivant au poste d'impression 17, les flacons 10 à imprimer s'engagent par leur culot 12, lesdites glissières fixes étant établies de manière à ce qu'il en résulte un contrôle de l'orientation angulaire de ces flacons 10 autour de leur axe de nature à permettre un engagement convenable du bloc rotatif 68 sur leur dit culot 12, compte tenu de la tolérance d'engagement que présente par lui-même à cet égard celui-ci, comme mentionné ci-dessus.In practice, at the printing station 17, there are also provided, on the frame 13, fixed slides, between which, arriving at the printing station 17, the vials 10 to be printed engage by their base 12, said fixed slides being established so that this results in a control of the angular orientation of these bottles 10 around their axis so as to allow proper engagement of the rotary block 68 on their said base 12, taking into account the tolerance of commitment that he himself presents in this respect, as mentioned above.

Ces glissières fixes ne sont pas visibles sur les figures.These fixed slides are not visible in the figures.

Suivant l'invention, le bloc d'appui 68 est calé en rotation sur un levier 72 qui, par des moyens d'engagement réglables en position suivant sa longueur, engrène avec un chariot 73, dit ci-après par commodité chariot de commande, monté mobile sur un guide 74 en synchronisme avec le chariot porte-raclette 34.According to the invention, the support block 68 is locked in rotation on a lever 72 which, by engagement means adjustable in position along its length, meshes with a carriage 73, hereinafter said for convenience, control carriage, movably mounted on a guide 74 in synchronism with the squeegee carriage 34.

Dans la forme de réalisation représentée, ce chariot de commande 73 comporte deux barres 76, qui s'étendent parallèlement à celles 37, 41 constituant les guides 32, 35 du chariot porte-écran 31 et du chariot porte-raclette 34, et le guide 74 correspondant est constitué par deux consoles 77, qui, établies parallèlement l'une à l'autre, à distance l'une de l'autre, sont solidaires du bâti 13, et sont traversées à coulissement par lesdites barres 76.In the embodiment shown, this control carriage 73 comprises two bars 76, which extend parallel to those 37, 41 constituting the guides 32, 35 of the screen-carrying carriage 31 and the squeegee carriage 34, and the guide 74 corresponding consists of two brackets 77, which, established parallel to each other, at a distance from each other, are integral with the frame 13, and are slidably traversed by said bars 76.

Le levier 72 destiné à la commande du bloc d'appui 68 est calé en rotation sur l'arbre 70 portant celui-ci, et les moyens d'engagement que porte réglables en position ce levier 72 sont constitués par un ergot 79, en pratique un galet rotatif, librement engagé dans une glisière 80 portée à cet effet verticalement, c'est-à-dire perpendiculairement à ses barres 76, par le chariot de commande 73 concerné.The lever 72 for controlling the support block 68 is locked in rotation on the shaft 70 carrying the latter, and the engagement means that door adjustable in position this lever 72 consist of a lug 79, in practice a rotary roller, freely engaged in a slide 80 carried for this purpose vertically, that is to say perpendicular to its bars 76, by the control carriage 73 concerned.

En pratique, pour son réglage en position, lé galet rotatif constituant l'ergot 79 est porté par un axe 81, qui traverse une boutonnière 82 prévue à cet effet longitudinalement dans le levier 72, avec blocage en position en un point quelconque de celle-ci par un écrou 125, qui, disposé d'un premier côté de ce levier 72, coopère, en maintien, avec une tête 83 établie de l'autre côté de celui-ci.In practice, for its adjustment in position, the rotary roller constituting the lug 79 is carried by a pin 81, which passes through a buttonhole 82 provided for this purpose longitudinally in the lever 72, with locking in position at any point thereof. ci by a nut 125, which, disposed on a first side of this lever 72, cooperates, in maintenance, with a head 83 established on the other side thereof.

Conjointement, la glissière 80 correspondante du chariot de commande 73 est constituée entre deux rails 123 rapportés verticalement sur un bloc de support 124 solidaire des barres 76 que comporte ce chariot de commande 73.At the same time, the corresponding slide 80 of the control carriage 73 is formed between two rails 123 mounted vertically on a support block 124 secured to the bars 76 that this control carriage 73 comprises.

Ces dispositions, décrites ici en référence au levier 72, s'appliquent aussi bien à tous les leviers de la machine suivant l'invention munis de moyens d'engagement réglables suivant leur longueur, et il en est de même pour les glissières associées.These provisions, described here with reference to lever 72, apply equally to all the levers of the machine according to the invention provided with engagement means adjustable according to their length, and it is the same for the associated slides.

Le chariot porte-raclette 34 et le chariot de commande 73 du bloc d'appui 68 présentent chacun, parallèlement l'un à l'autre, une glissière.The squeegee carriage 34 and the control carriage 73 of the support block 68 each have, in parallel with one another, a slide.

Pour le chariot porte-raclette 34, il s'agit de la glissière 58, suffisamment prolongée vers le bas à cet effet ; pour le chariot de commande 73 du bloc d'appui 68, il s'agit d'une glissière 85, que présente à cet effet verticalement ce chariot de commande 73, parallèlement à sa glissière 80.For the squeegee carriage 34, it is the slide 58, extended sufficiently downward for this purpose; for the control carriage 73 of the support block 68, it is a slide 85, which for this purpose has this control carriage 73 vertically, parallel to its slide 80.

Conjointement, sur un arbre 86 monté rotatif dans des paliers 87 solidaires du bâti 13, sont calées en rotation, parallèlement l'une à l'autre, deux manivelles 88, 89 de même longueur, l'une la manivelle 88, qui engrène avec la glissière 58 du chariot porte-raclette 34, l'autre, la manivelle 89, qui engrène avec la glissière 85 du chariot de commande 73 du bloc d'appui 68.Jointly, on a shaft 86 rotatably mounted in bearings 87 integral with the frame 13, are rotated, parallel to each other, two cranks 88, 89 of the same length, one the crank 88, which meshes with the slide 58 of the squeegee carriage 34, the other, the crank 89, which meshes with the slide 85 of the control carriage 73 of the support block 68.

Pour leur engrènement avec leurs chariots respectifs, ces manivelles 88, 89 portent, comme précédemment un ergot 93, 99, constitué de préférence d'un galet rotatif.For their engagement with their respective carriages, these cranks 88, 89 carry, as previously, a lug 93, 99, preferably consisting of a rotary roller.

On désignera ci-après par R' le rayon de l'organe de renvoi 20 du convoyeur 15 au poste d'impression 17, ou rayon de giration du trajet circulaire suivi par les flacons 10 à imprimer lors de leur défilement au poste d'impression 17.The radius of the return member 20 from the conveyor 15 to the printing station 17, or radius of gyration of the circular path followed by the vials 10 to be printed when they are scrolled at the printing station, will be denoted by R ′ below. 17.

On supposera tout d'abord que, tel qu'illustré par les figures 5A, 5B, le rayon de courbure R de la face à imprimer 14 des flacons 10 concernés est égal au rayon de giration R' augmenté de la demi-épaisseur e/2 de ces flacons, e étant leur épaisseur.Assume first of all that, as illustrated by FIGS. 5A, 5B, the radius of curvature R of the printing face 14 of the vials 10 concerned is equal to the radius of gyration R 'increased by the half thickness e / 2 of these bottles, e being their thickness.

Il est fait en sorte, dans ce cas, que le galet 79 porté par le levier 72 sur lequel est calé le bloc d'appui 68 se situe au droit de l'arbre oscillant 44, dans le prolongement de celui-ci.In this case, it is ensured that the roller 79 carried by the lever 72 on which the support block 68 is wedged is located in line with the oscillating shaft 44, in the extension thereof.

Conjointement, dans ce cas, le galet 57 constituant les moyens d'engagement réglables en position portés par le levier 54 est disposé au droit de l'articulation 56 de ce levier 54 sur le bâti 13.Jointly, in this case, the roller 57 constituting the engagement means adjustable in position carried by the lever 54 is disposed in line with the articulation 56 of this lever 54 on the frame 13.

Le chariot porte-raclette 34 est dès lors immo- bilé, et donc aussi le chariot de commande 73.The squeegee carriage 34 is therefore immobilized, and therefore also the control carriage 73.

Lorsque, porté par le convoyeur 15, un flacon 10 à imprimer arrive au droit du poste d'impression 17, le bloc d'appui 68, sous la commande de la partie axialement mobile 44B de l'arbre oscillant 44, vient s'appliquer contre le culot 12 de ce flacon 10, celui-ci ayant été prépositionné en conséquence par les glissières fixes associées, suivant les modalités décrites précédemment.When, carried by the conveyor 15, a bottle 10 to be printed arrives at the right of the printing station 17, the support block 68, under the control of the axially movable part 44B of the oscillating shaft 44, is applied against the base 12 of this bottle 10, the latter having been prepositioned accordingly by the associated fixed slides, according to the methods described above.

Entraîné suivant le rayon de giration R' par le convoyeur 15, le flacon 10 concerné vient ensuite, par une génératrice de sa face 14 à imprimer, au contact de l'écran 30, figure 5A.Driven along the radius of gyration R 'by the conveyor 15, the bottle 10 concerned then comes, by a generator of its face 14 to be printed, in contact with the screen 30, FIG. 5A.

Il résulte de ce qui précède que, la face 14 à imprimer appartenant globalement à une surface cylindrique de rayon R centrée sur l'arbre oscillant 44 autour duquel se fait la giration du flacon 10 concerné, celui-ci se développe alors sans glissement au contact de l'écran 39, figure 5B, tandis que la raclette 33 reste immobile au droit de sa génératrice de contact avec cet écran 39, dans le plan vertical, qui, tel que schématisé en traits interrompus par sa trace sur les figures, passe par l'axe de l'organe de renvoi 20.It follows from the above that, the face 14 to be printed generally belonging to a cylindrical surface of radius R centered on the oscillating shaft 44 around which the gyration of the bottle 10 concerned takes place, the latter then develops without sliding on contact of the screen 39, FIG. 5B, while the squeegee 33 remains stationary at the right of its generator of contact with this screen 39, in the vertical plane, which, as shown diagrammatically in broken lines by its trace in the figures, passes through the axis of the return member 20.

Tout au long de la giration de l'objet 10 en cours d'impression autour de l'axe de l'arbre oscillant 44, le bloc d'appui 68 appliqué à son culot 12 en contrôle de manière ferme l'orientation angulaire autour de son axe, qui, comme mentionné ci-dessus, s'étend tranversalement par rapport aux guides du chariot porte-écran 32 et du chariot porte-raclette 34, ledit axe étant en pratique celui dudit bloc d'appui 68.Throughout the gyration of the object 10 being printed around the axis of the oscillating shaft 44, the support block 68 applied to its base 12 firmly controls the orienta angular around its axis, which, as mentioned above, extends transversely with respect to the guides of the screen-carrier carriage 32 and of the squeegee-carriage 34, said axis being in practice that of said support block 68.

On supposera maintenant, en référence aux figures 6A, 6B, que le rayon de courbure R de la face à imprimer 14 des flacons 10 concernés est inférieur au rayon de giration R' de ces flacons augmenté de leur demi-épaisseur e/2.It will now be assumed, with reference to FIGS. 6A, 6B, that the radius of curvature R of the printing face 14 of the vials 10 concerned is less than the radius of gyration R 'of these vials increased by their half thickness e / 2.

Il suffit, dans ce cas, suivant l'invention, d'ajuster en conséquence, d'une part, sur le levier 72, la position du galet 79 porté par celui-ci, et d'autre part, sur le levier 54, la position du galet 57 porté également par celui-ci.It is sufficient, in this case, according to the invention, to adjust accordingly, on the one hand, on the lever 72, the position of the roller 79 carried by it, and on the other hand, on the lever 54, the position of the roller 57 also carried by the latter.

Un tel réglage peut par exemple se faire à l'aide d'un abaque convenablement établi à cet effet en fonction des rayons de courbure possibles.Such an adjustment can, for example, be made using an abacus suitably established for this purpose as a function of the possible radii of curvature.

En pratique, dans le cas considéré d'un rayon de courbure inférieur au rayon de giration augmenté de la demi-épaisseur des flacons concernés, le galet 79 est à la fois rapproché de la périphérie de l'organe de renvoi 20 et du plan vertical V passant par l'axe de celui-ci, en sorte qu'il se situe dès lors à l'écart du plan passant par l'axe du bloc d'appui 68, et l'axe de l'organe de renvoi 20, et, conjointement, le galet 57 est déplacé en conséquence, au-dessus de l'arbre 56, pour un mouvement approprié de la raclette 33.In practice, in the case under consideration of a radius of curvature less than the radius of gyration increased by the half-thickness of the bottles concerned, the roller 79 is both close to the periphery of the return member 20 and to the vertical plane V passing through the axis of the latter, so that it is therefore located away from the plane passing through the axis of the support block 68, and the axis of the return member 20, and, jointly, the roller 57 is moved accordingly, above the shaft 56, for appropriate movement of the squeegee 33.

Suivant l'invention, le chariot porte-raclette 34 étant alors mobile dans le même sens que le chariot porte-écran 31, comme indiqué ci-dessus, le facon 10 à imprimer se développe alors encore convenablement au contact de l'écran 30, tel qu'illustré par les figures 6A, 6B, le galet 79 qui en matérialise en pratique le centre de courbure de la face 14 à imprimer se déplaçant parallèlement à l'écran 30, dans le même sens que celui-ci, mais avec une course moindre, et en synchronisme avec la raclette 33.According to the invention, the squeegee carriage 34 then being movable in the same direction as the screen carrier 31, as indicated above, the way 10 to be printed then develops still properly in contact with the screen 30, as illustrated in FIGS. 6A, 6B, the roller 79 which in practice materializes the center of curvature of the face 14 to be printed moving parallel to the screen 30, in the same direction as the latter, but with a less stroke, and in synchronism with squeegee 33.

Au cours de son développement au contact de l'écran 30, le flacon 10 en cours d'impression est conjointement l'objet d'un léger mouvement de rotation sur lui-même, 'autour de son axe, sous la commande du bloc d'appui 68, qui en contrôle à tout instant l'orientation angulaire autour dudit axe.During its development in contact with the screen 30, the bottle 10 during printing is jointly subjected to a slight rotational movement on itself, 'around its axis, under the control of the block d 'support 68, which controls the angular orientation around said axis at all times.

Lorsque, tel qu'illustré par les figures 7A, 7B, le rayon de courbure R de la face à imprimer 14 des flacons 10 concernés est supérieur au rayon de giration R' augmenté de leur demi-épaisseur, des réglages semblables aux précédents sont effectués, mais le galet 79 est alors écarté de la périphérie de l'organe de renvoi 20, tout en étant, comme précédemment, rapproché du plan vertical V passant par l'axe de celui-ci, tandis que le galet 57 est placé en dessous de l'arbre 56.When, as illustrated in FIGS. 7A, 7B, the radius of curvature R of the printing face 14 of the vials 10 concerned is greater than the radius of gyration R ′ increased by their half thickness, adjustments similar to the previous ones are made , but the roller 79 is then spaced from the periphery of the deflection member 20, while being, as before, close to the vertical plane V passing through the axis thereof, while the roller 57 is placed below from tree 56.

Le chariot porte-raclette 34 et le chariot porte-écran 31 se déplacent alors en sens opposés l'un par rapport à l'autre.The squeegee carriage 34 and the screen carriage 31 then move in opposite directions relative to each other.

On appréciera que ces réglages sont relativement aisés et faciles à exécuter.It will be appreciated that these adjustments are relatively easy and easy to perform.

Ils permettent d'appliquer la machine à imprimer suivant l'invention à l'impression de flacons 10, et d'une manière générale de quelconques autres objets, de section transversale ovale.They make it possible to apply the printing machine according to the invention to the printing of vials 10, and in general of any other objects, of oval cross section.

A la fin de l'impression d'un tel objet, et sous la commande de la partie axialement mobile 44B de l'arbre oscillant 44, le bloc d'appui 68 s'écarte du culot 12 d'un tel flacon 10.At the end of the printing of such an object, and under the control of the axially movable part 44B of the oscillating shaft 44, the support block 68 departs from the base 12 of such a bottle 10.

L'arbre oscillant 44 ramène alors le bloc d'appui 68 à sa position initiale, cependant que, conjointement, l'écran 30 et la raclette 33 reviennent également à leur position initiale.The oscillating shaft 44 then returns the support block 68 to its initial position, while jointly the screen 30 and the squeegee 33 also return to their initial position.

Un nouveau cycle peut commencer.A new cycle can begin.

La figure 8 illustre l'application de la machine à imprimer suivant l'invention à l'impression de flacons 10 de section transversale circulaire.FIG. 8 illustrates the application of the printing machine according to the invention to the printing of bottles 10 of circular cross section.

Ainsi qu'on le notera, suivant l'invention, le bloc d'appui 68 est monté rotatif dans un support 69 qui est lui-même porté par un levier 71 directement monté oscillant sur le bâti 13, ce levier 71 étant calé en rotation sur un arbre 44 monté oscillant autour de son axe sur ledit bâti 13.As will be noted, according to the invention, the support block 68 is rotatably mounted in a support 69 which is itself carried by a lever 71 directly mounted oscillating on the frame 13, this lever 71 being locked in rotation on a shaft 44 mounted oscillating around its axis on said frame 13.

Il en résulte, du point de vue de la structure, que le porte-à-faux de l'ensemble est minimal, ledit ensemble pouvant de ce fait présenter une bonne rigidité garante de la précision du travail effectué, et, du point de vue du fonctionnement, que, suivant une caractéristique de l'invention, au cours de la course du chariot porte-écran 31, la raclette 33, l'axe du bloc d'appui 68 et celui de l'arbre 44 sur lequel est calé le support 69 de ce dernier viennent en pratique à être dans un même plan vertical.As a result, from the point of view of the structure, that the overhang of the assembly is minimal, said assembly possibly therefore having good rigidity guaranteeing the precision of the work carried out, and, from the point of view of operation, that, according to a characteristic of the invention, during the travel of the screen-carrying carriage 31, the squeegee 33, the axis of the support block 68 and that of the shaft 44 on which the support 69 of the latter come in practice to be in the same vertical plane.

Dans ce cas, le levier 72 sur lequel est calé en rotation le bloc d'appui 68 est éliminé, ce levier 72 étant avantageusement fait à cet effet démontable, suivant les modalités décrites précédemment pour le levier 60, et il y est substitué, suivant des modalités, qui, ne faisant pas partie de la présente invention, ne seront pas décrites en détail ici, un pignon 95.In this case, the lever 72 on which the support block 68 is rotated is eliminated, this lever 72 being advantageously made for this removable purpose, according to the methods described above for the lever 60, and it is substituted therefor, according to methods, which, not forming part of the present invention, will not be described in detail here, a pinion 95.

Ce pignon 95 engrène alors avec une crémaillère 96, qui est fixe, en étant portée par le bâti 13, et qui est cintrée, en étant centrée sur l'axe de l'arbre oscillant 44.This pinion 95 then meshes with a rack 96, which is fixed, being carried by the frame 13, and which is curved, being centered on the axis of the oscillating shaft 44.

Conjointement, le levier 60 destiné à la commande du chariot porte-écran 31 est calé en rotation sur un arbre auxiliaire 97, qui est monté rotatif dans un palier 98 solidaire du bâti 13, et sur lequel est calé en rotation un levier 99'.At the same time, the lever 60 intended for controlling the screen-carrying carriage 31 is locked in rotation on an auxiliary shaft 97, which is rotatably mounted in a bearing 98 integral with the frame 13, and on which a lever 99 'is locked in rotation.

Par des moyens d'engagement constitués en pratique par un ergot 101, et plus précisément par un galet rotatif, ce levier 99' engrène avec une glissière 100 prévue à cet effet verticalement sur un chariot auxiliaire 102, monté mobile sur un guide parallèlement au chariot porte-raclette 34, et en synchronisme avec celui-ci.By engagement means constituted in practice by a lug 101, and more precisely by a rotary roller, this lever 99 'meshes with a slide 100 provided for this purpose vertically on an auxiliary carriage 102, mounted movably on a guide parallel to the carriage squeegee holder 34, and in synchronism therewith.

En pratique, ce chariot auxiliaire 102 est monté mobile sur les barres 41 formant le guide 35 du chariot porte-raclette 34.In practice, this auxiliary carriage 102 is mounted movably on the bars 41 forming the guide 35 of the squeegee carriage 34.

Par son galet 61, le levier 60 engrène, comme précédemment, avec la glissière 62 du chariot porte-écran 31, cette glissière 62 ayant été supposée prolongée suffisamment à cet effet vers le haut.By its roller 61, the lever 60 meshes, as before, with the slide 62 of the screen carrier carriage 31, this slide 62 having been assumed to be extended sufficiently upward for this purpose.

En outre, par un galet 103, le levier 48, également supposé suffisamment prolongé vers le haut à cet effet, engrène avec la glissière 100 du chariot auxiliaire 102, pour la commande de celui-ci.In addition, by a roller 103, the lever 48, also assumed to be sufficiently extended upward for this purpose, meshes with the slide 100 of the auxiliary carriage 102, for controlling the latter.

Il résulte de ce qui précède que, à l'inverse des dispositions précédentes, le chariot porte-écran 31 est dans ce cas mobile en va-et-vient en sens inverse par rapport au chariot porte-raclette 34, tout en étant commandé en synchronisme avec celui-ci.It follows from the above that, unlike the previous arrangements, the screen-carrying carriage 31 is in this case movable back and forth in the opposite direction relative to the squeegee carriage 34, while being controlled by synchronism with it.

Il résulte également de ce qui précède que, au poste d'impression 17, le bloc d'appui 68 assure une rotation au moins partielle sur eux-mêmes des objets 10 à imprimer au cours de leur impression, ce bloc 68 étant muni à cet effet d'un ergot escamotable qui vient en prise avec une encoche correspondante prévue également à cet effet sur le culot 12 d'un tel flacon, suivant des modalités bien connues en elles-mêmes.It also follows from the above that, at the printing station 17, the support block 68 ensures at least partial rotation of the objects 10 to be printed on themselves during their printing, this block 68 being provided with this effect of a retractable lug which engages with a corresponding notch also provided for this purpose on the base 12 of such a bottle, according to methods well known in themselves.

Conjointement, il est prévu, pour l'écran 30, une compensation du débattement transversal dont sont l'objet au poste d'impression 17 les flacons 10 à imprimer du fait de leur trajet circulaire.At the same time, for the screen 30, provision is made for compensation for the transverse movement of which the bottles 10 to be printed are subject to the printing station 17 due to their circular path.

A cet effet, le cadre 39 de l'écran 30 est monté mobile verticalement sur le chariot 31 qui le porte, à l'encontre de ressorts 105, et il porte par gravité sur un galet 106 disposé en bout d'un levier 107 lui-même calé en rotation sur l'arbre oscillant 44.To this end, the frame 39 of the screen 30 is mounted vertically movable on the carriage 31 which carries it, against springs 105, and it carries by gravity on a roller 106 disposed at the end of a lever 107 itself. - even locked in rotation on the oscillating shaft 44.

Ces dispositions ne faisant pas en propre l'objet de la présente invention, elles ne seront pas décrites plus en détail ici.These provisions not being the subject of the present invention, they will not be described in more detail here.

Bien entendu la présente invention ne se limite pas aux formes de réalisation décrites et représentées, mais englobe toute variante d'exécution.Of course the present invention is not limited to the embodiments described and shown, but encompasses any variant.

En particulier, pour adaptation à des flacons ou autres objets à épaisseurs ou diamètres différentes, l'écran et la raclette doivent normalement être de préférence montés réglables en hauteur sur les chariots qui les portent.In particular, for adaptation to bottles or other objects of different thicknesses or diameters, the screen and the squeegee should normally be preferably adjustable in height on the carriages which carry them.

En outre, le long du convoyeur mis en oeuvre, plusieurs postes d'impression peuvent être prévus, avec, si désiré, entre eux, d'autres postes de traitement tels que poste de séchage et/ou d'étuvage.In addition, along the conveyor used, several printing stations can be provided, with, if desired, between them, other processing stations such as drying and / or steaming station.

Mais, ainsi qu'on le notera, les supports porte-objet décrivent toujours le même trajet, quels que soient le type et/ou les caractéristiques des objets qu'ils portent.But, as will be noted, the object holders always describe the same path, whatever the type and / or the characteristics of the objects they carry.

Claims (9)

1. A screen-printing machine of the type which, to serve at least one printing station (17), comprises a conveyor (15) carrying at least one article-holder support (16) for supporting an article (10) to be printed, and, at said printing station (17), a screen (30) which is carried by a screen-holder carriage (31) mounted to reciprocate on a guide (32), a squeegee (33) which is carried by a squeegee-holder carriage (34) mounted to reciprocate on a guide (35) parallel to the former guide, and a block (68), for convenience hereinafter designated abutment block, which by abutting against the article (10) to be printed is able to control its angular orientation about a transverse axis relative to the guides (32, 35) of the screen-holder carriage (31) and of the squeegee-holder carriage (34), characterised in that said abutment block (68) is mounted for rotation on a lever (72) which, by engagement means (79) which are adjustable in position to vary the length of the lever, engages with an operating carriage (73) movably mounted on a guide (77) in synchronism with the squeegee-holder carriage (34).
2. A printing machine according to Claim 1, characterised in that the squeegee-holder carriage (34) and the operating carriage (73) of the abutment block (68) each have, parallel to one another, a slideway (58, 85) and two cranks (88, 89) of equal length are fixed for rotation, parallel to one another, on a rotatably mounted shaft (86), one of the cranks engaging with the slideway (58) of the squeegee-holder carriage (34) and the other engaging with the operating carriage (73) of the abutment block (68).
3. A printing machine according to either of Claims 1 and 2, in which the screen-holder carriage (31) is operated .in synchronism with the squeegee-holder carriage (34) by a rotating shaft (44) mounted to oscillate under the control of a cam (46), characterised in that on the oscillating shaft (44) there is mounted a lever (60) which, by engagement means (61) adjustable in position to vary the length of the lever, engages directly with said screen-holder carriage (31).
4. A printing machine according to Claim 3, in which for the oscillation control of the oscillating shaft (44) a lever (48) is fixed for rotation thereon, which lever by engagement means (49) engages with the associated cam (46), characterised in that said lever (48) forms one of the sides of a deformable parallelogram, the opposite side of which is formed by a lever (54), and this latter, by engagement means (57) which are adjustable in position to vary the length of the lever, engages with the squeegee-holder carriage (34).
5. A printing machine according to Claim 3, characterised in that the lever (60) which engages with the screen-holer carriage (31) is demountable in such a way that it can be fixed for rotation, not on the oscillating shaft (44), but on an auxiliary shaft (97) on which is fixed for rotation a lever (99) which engages with an auxiliary carriage (102) mounted to move parallel to the squeegee-holder carriage (34) and in synchronism therewith and, additionally, the lever (72) fixed for rotation on the abutment block (68) is likewise demountable so that it can be replaced by a pinion (95) meshing with a fixed rack (96) which, being curved, is centred on the oscillating shaft (44).
6. A printing machine according to any of Claims 1 to 5, characterised in that the engagement means carried by a lever comprise a pin freely engaged in a slideway carried for this purpose by the respective carriage.
7. A printing machine according to any of Claims 1 to 6, in which at the printing station (17) the conveyor (15), which is continuously advancing, passes over a circular guide member (20), characterised in that the abutment block (68) is carried by a support (69) fixed for rotation on a shaft (44) which is coaxial to said guide member (20) and which is mounted to oscillate in synchronism with the squeege-holder carriage (34) and the screen-holder carriage (31).
8. A printing machine according to any of Claims 1 to 7, characterised in that the abutment block (68) is rotatably mounted in a support (69), said support (69) itself being carried by a lever (71) fixed for rotation on a shaft (44) mounted to oscillate about its axis on the frame (13) of the assembly.
9. A printing machine according to Claim 7, characterised in that during the travel of the screen-holder carriage (31) the squeegee (33), the axis of the abutment block (68) and that of the shaft (44) on which is fixed the support (69) of this latter come to be in the same vertical plane.
EP19830401118 1982-06-02 1983-06-02 Silk screen printing machine Expired EP0095987B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8209550 1982-06-02
FR8209550A FR2527986A1 (en) 1982-06-02 1982-06-02 PRINTING MACHINE WITH SILK SCREEN

Publications (2)

Publication Number Publication Date
EP0095987A1 EP0095987A1 (en) 1983-12-07
EP0095987B1 true EP0095987B1 (en) 1985-09-18

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EP19830401118 Expired EP0095987B1 (en) 1982-06-02 1983-06-02 Silk screen printing machine

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EP (1) EP0095987B1 (en)
DE (1) DE3360836D1 (en)
FR (1) FR2527986A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3637638A1 (en) * 1986-11-05 1988-05-11 Kammann Maschf Werner DEVICE FOR DECORATING OBJECTS
DE3740457A1 (en) * 1987-11-28 1989-06-08 Balsfulland Gmbh Maschf Geb Screen printing machine
EP0535259A1 (en) * 1991-09-27 1993-04-07 Trong Chia Chiang A micro-curvature adjustable device for curve screen printing presses and ironing presses

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122768A (en) * 1977-04-19 1978-10-31 Dubuit Of America, Inc. Screen printing press attachment for printing objects of revolution

Also Published As

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FR2527986B1 (en) 1985-03-22
FR2527986A1 (en) 1983-12-09
DE3360836D1 (en) 1985-10-24
EP0095987A1 (en) 1983-12-07

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