EP0116187B1 - Imprimante avec rentrage de papier automatique - Google Patents

Imprimante avec rentrage de papier automatique Download PDF

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Publication number
EP0116187B1
EP0116187B1 EP83201856A EP83201856A EP0116187B1 EP 0116187 B1 EP0116187 B1 EP 0116187B1 EP 83201856 A EP83201856 A EP 83201856A EP 83201856 A EP83201856 A EP 83201856A EP 0116187 B1 EP0116187 B1 EP 0116187B1
Authority
EP
European Patent Office
Prior art keywords
drum
rotation
clamping elements
sheet
slot
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
EP83201856A
Other languages
German (de)
English (en)
Other versions
EP0116187A3 (en
EP0116187A2 (fr
Inventor
Klaus Brandenburg
Wendelin Weber
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.)
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0116187A2 publication Critical patent/EP0116187A2/fr
Publication of EP0116187A3 publication Critical patent/EP0116187A3/de
Application granted granted Critical
Publication of EP0116187B1 publication Critical patent/EP0116187B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/22—Clamps or grippers
    • B41J13/223—Clamps or grippers on rotatable drums

Definitions

  • the invention relates to a device for printing a sheet-like support, with a cylindrical drum rotatable about its longitudinal axis, on which clamping elements are arranged, which are rotatable about a clamping element axis lying parallel to the drum axis, and which, when the drum rotates in the direction of pressure rotation, the support resiliently against one Clamp the surface running in the circumferential direction of the drum to the outside or release it when the drum rotates in the opposite direction, for which purpose the clamping elements are in engagement with control elements and with guide means for guiding the sheet-like support on the drum.
  • the object of the invention is to provide a device for printing a sheet-like base, which has a much simpler structure than the known device and is therefore inexpensive to manufacture.
  • the drum for receiving the support has at least one axial slot that cuts into the circumference and has a depth that extends essentially in the circumferential direction, into which one end of the clamping elements can be inserted, and that for control purposes the clamping elements engage with their end facing away from the slot into the circumference of a disk which is rotatable on the drum axis and relative to the drum and which carries on its outside a first stop element which rotates with it and which cooperates in a resilient manner with a second stop element arranged on the housing of the device, that when the drum rotates in the direction of pressure rotation, both stopper elements slide over one another and block the rotation of the disk when the drum rotates in the opposite direction, a tension spring arranged between the disk and the drum being tensioned.
  • the drum preferably has a slot in its interior which extends over the entire length of the drum.
  • the drum is rotated counter to the normal direction of printing when printing on a sheet or a template until the slot is opposite the sheet or sheet edge brought to the drum by the transport device (basic position).
  • the clamping elements provided for holding the sheet do not protrude into the slot, so that the sheet can be pushed into the slot by means of a transport device. If the direction of rotation of the drum is subsequently reversed, that is to say it runs in the direction of pressure rotation, the clamping elements are released and engage again in the slot. They press the sheet in the slot against the opposite wall of the slot and block it in this way.
  • the drum is first rotated in the direction of printing rotation until the drum has almost, but not quite, reached its basic position. Then the drum is turned in the opposite direction to the basic position. The sheet unwinds from the drum so that it can be caught by paper pull-out rollers. Once the basic position of the drum has been reached, the clamping elements recede and the sheet can be pulled out of the slot and transported to a tray by means of the paper pull-out rollers, which are then set in rotation. A new sheet can then be inserted into the already available free slot. Then the process described begins again.
  • the stopper elements are designed or arranged so that when the drum rotates in the direction of pressure rotation, both stopper elements slide over one another.
  • the stopper element located on the disk can be designed to be axially resilient, for example.
  • both stopper elements run against each other in such a way that they and thus the entire disc are blocked.
  • a tension spring arranged between the disc and the drum is tensioned so that when the drum rotates in the direction of pressure rotation, the clamping elements are pressed back into the slot by this spring force.
  • Both the clamping elements and the disc or the stopper are very simple construction elements that are easy and inexpensive to manufacture and allow an inexpensive construction of the device mentioned.
  • the clamping elements and the disks are preferably arranged on both end faces of the drum. This allows a very simple assembly of the disks or the clamping elements on the drum.
  • a clamping rail which takes the place of individual clamping elements and which extends over the entire length of the slot. This ensures that a sheet to be printed is held in the slot uniformly and over the entire clamped length.
  • baffles which at least partially surround the drum like a cylinder jacket are provided as guide means.
  • the clamped sheet then runs between this casing and the drum.
  • slot-shaped openings in the wrapper which, for. B. extend over the entire length of the drum.
  • a sheet 3 to be printed On the surface of the drum 1 is a sheet 3 to be printed, for. B. a form of paper, arranged, the extent in the direction of the longitudinal axis 2 almost corresponds to the drum extent and in the drum circumferential direction almost the circumference of the drum 1.
  • a print head 4 with z. B. only one printing needle 5 is provided, which is arranged on a carriage 6, which can be guided with the aid of a guide rod 7 running parallel to the longitudinal axis 2 and displaced with a rotatable spindle 8 running parallel to it.
  • the drum 1 rotates in the printing rotation direction 9.
  • a certain pressure range 10 e.g. determines the size of a text field, swept over by the print head 4.
  • the drum 1 has a slot 11, which extends over its entire length and lies inside and parallel to the longitudinal axis 2 and which runs perpendicular to the longitudinal axis 2 at least approximately in the drum circumferential direction.
  • the sheet 3 is inserted with its upper edge.
  • the slot runs into the interior of the drum 1 at such an inclination that the sheet 3 is prevented from buckling in the upper region.
  • the sheet 3 is held in the slot 11 with the aid of clamping elements 12 which are arranged on both end faces of the drum 1 and are rotatable about a clamping element axis 13 which is fixedly connected to the drum 1 and runs parallel to the longitudinal axis 2.
  • the clamping element ends 12a engage in the position shown in Fig. 1 in the slot 11 and thus hold the sheet 3 in it.
  • the clamping elements 12 are pressed by means of the force of a tension spring 14 against the leaf 3, which is clamped between two bolts 15 and 16.
  • the spring force is transmitted to the clamping elements 12 with the aid of a disk 17 which is arranged on the longitudinal axis 2 and rotatable relative to the drum 1 and which, with its end facing away from the slot 11, engages in the periphery of the disk 17 or in a corresponding radial groove 17a, which is slightly larger than the relevant clamping element end.
  • the bolt 16 is fixed on the disc 17 and the bolt 15 through an opening 18 in the disc 17 through to the drum 1 so that the force of the spring 14 acts on the clamping elements 12 via the disc 17.
  • first stop element 19 On the disc 17 there is also a first stop element 19 which rotates with the disc 17 and is arranged resiliently in the direction of the axis 2. It is bevelled on its end face and engages with a corresponding second stopper element (20 in FIG. 2), which is fixedly arranged on the housing of the device.
  • This second stop element 20 is chamfered on its end facing the drum 1 like the first stop element 19, but is rotated by 180 ° relative to the latter. Therefore, if the drum 1 is moved in the direction of pressure rotation 9, nothing changes in the clamping state of the sheet 3.
  • the second stop element 20 arranged on the housing in the region of the first stop element 19 is only swept by the first stop element 19 and does not hinder the drum movement.
  • the second stop element 20 Each time the second stop element 20 is swept by the first stop element 19, the latter only springs back axially into its starting position.
  • the clamping elements 12 thus hold the sheet 3 in the slot 11, so that it is carried along by the drum 1 in the direction of the arrow 9 during the drum movement.
  • the second stop element 20 can be resilient and the first fixed.
  • the clamping elements 12 can on their side lying on the sheet 3 additionally with a tip, z. B. made of metal, so that the sheet 3 is held even better.
  • the tip can e.g. B. that of a pin that penetrates the clamping element 12.
  • the additional rotation of the drum 1 is thus sufficient to press the clamping elements 12 carried by it with its end facing away from the slot 11 against the disk 17, so that, due to the leverage effect, the, for example, angularly configured clamping elements 12 around the clamping element axis 13 from the slot 11 can be unscrewed.
  • the sheet 3 is thus no longer held by it and can now be pulled out of the slot 11 or from the drum 1. This position of the drum 1 will be called in the following basic position.
  • the clamping elements 12 thus serve to stop the drum 1 when the disc 17 is already stationary. This task can also be performed by the bolt 15 and the opening 18. This prevents the clamping elements 12 from striking too hard against the edge of the groove 17a when the disk 17 is already blocked and only then causing the drum 1 to be blocked.
  • the bolt 15 also serves to axially secure the washer 17, since it is provided with a head which projects beyond the slot width of the opening 18.
  • FIG. 2 shows a partial axial section of the cylindrical drum according to FIG. 1. The section runs both through the clamping elements and through the stopper elements.
  • the clamping element 12 ' is angled in the direction of the cylinder axis 2 for better clamping of the sheet-shaped base 3. It is firmly connected to the drum body 1 by means of a screw 13a, about which it can move freely. On the other hand, it engages with its end facing away from the slot 11 into the already mentioned groove 17a of the control disk 17.
  • the first stopper element 19, which is spring-mounted in the direction of the cylinder axis 2, is firmly connected to this control disk 17.
  • a compression spring 19a is provided, which is supported on the one hand by a rear recess 19b in the control disk 17 and on the other hand by the drum body 1.
  • the second stop element 20 is firmly connected to a housing part 20a of the printer. Both stop elements 19 and 20 have bevels which face each other and are inclined such that the stop elements 19, 20 slide over one another when the drum 1 rotates in the direction of pressure rotation, e.g. the stopper element 19 is pressed axially inwards. When the drum 1 rotates counter to the direction of pressure rotation, these stopper elements run against each other and block the further movement of the control disk 17.
  • Fig. 3 shows a perspective view of another drum of a printer according to the invention.
  • This drum 1 has at its two ends a control disk 17, only one of which is shown.
  • a clamping rail 12b with a U-shaped profile is arranged, into which the clamping elements 12" engage.
  • the clamping rail 12b is shown in more detail in FIG. 4. It is arranged in its entire length inside the drum 1 and has resilient tabs 12c which, when the drum 1 rotates in the direction of printing rotation, press a sheet-shaped support to be printed against the wall of the slot 11 located inside the drum 1.
  • the resilient tabs 12c can be evenly distributed over the length of the clamping rail 12b.
  • the clamping elements 12 ′′ are provided, for example, with expanding mandrels 12d, which can be inserted into a suitably designed bore on the end face of the drum for fastening them to the drum 1.
  • this bore can be made in an additional plate firmly attached to the end face of the drum.
  • the drum 1 in the basic position can be easily loaded with sheet-like material. 5, which practically shows a side view of the device according to the invention.
  • the drum 1 shown there is in the basic position, i. H. the slot 11 is positioned such that a sheet 3 guided from a magazine M by means of a sheet feed roller 22 (transport device) and via a guide plate 23 can be inserted directly into the slot 11.
  • the clamping elements 12 are, as already mentioned, pivoted out of the slot 11.
  • the sheet 3 can thus be pushed directly into the slot 11 in the drum position shown in FIG. 2, which is also done with the help of the sheet feed roller 22. If the drum 1 is then rotated in the direction of pressure rotation 9, the clamping elements 12, as already described under FIG. 1, engage in the slot 11 and hold the sheet 3 firmly, so that it is wound around the drum 1.
  • guide plates 1 a, 1 a ' can be provided (guide plates) which extend around the drum 1 in the shape of a cylinder jacket. Only in the area of the sheet feeder and in the printing area are slit-shaped openings provided, the length of which corresponds to the drum length.
  • the sheet 3 can also be used in other ways, e.g. by rollers distributed over the circumference of the drum.
  • the sheet width z. B. corresponds to the circumferential length of the drum 1
  • the drum 1 is rotated after the end of printing in the direction of rotation 9 to almost the basic position.
  • the end of the sheet that is to say the end edge opposite the clamped sheet edge
  • the first stop element 19 is not yet blocked by the second stop element 20, so that the drum 1 can then be rotated in the opposite direction to the pressure rotation direction 9 into the basic position (blocking of the first stop element 19 by the second stop element 20). In this position, the clamping elements 12 then release the sheet 3.
  • the sheet 3 By rotating the drum 1 in the direction opposite to the direction 9, the sheet 3, the end edge of which lay between the guide plates 1a, 1a ', is simultaneously unwound from the drum 1 and moved in the direction of the arrow 24. It is guided by a further guide plate 25 between two sheet pull-out rollers 26, 26a.
  • these sheet pull-out rollers transport the sheet 3 into a storage compartment 27 which protrudes from the printer housing 28 for easier sheet removal.
  • Both the movements of the drum 1 and the print head 4 and the movements of the sheet feed or sheet extraction rollers can be carried out with the aid of a motor 29.
  • the sequence of movements can be controlled via suitable mechanical and / or electrical switching devices.
  • the invention relates to all printers with a rotating drum 1 and is not limited to the needle head printer described in the exemplary embodiment.

Landscapes

  • Handling Of Cut Paper (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Claims (7)

1. Machine pour imprimer un support en forme de feuille (3), comportant un tambour cylindrique (1) pouvant tourner autour de son axe longitudinal, sur lequel sont montés des organes de pinçage (12,12', 12") qui peuvent pivoter autour d'un axe (13) parallèle à l'axe de tambour (2) et qui, lors de la rotation du tambour (1) dans le sens d'impression (9), pincent la feuille (3) élastiquement vers l'extérieur contre une surface s'étendant dans le sens périphérique du tambour ou respectivement, lors de la rotation du tambour dans le sens opposé, la libèrent, les organes de pinçage (12,12', 12") étant à cet effet en prise avec des éléments de commande (17), et des moyens de guidage (1a, 1a') pour guider le support en forme de feuille (3) sur le tambour (1), caractérisée en ce que le tambour (1) possède, pour recevoir la feuille (3), au moins une fente axiale s'ouvrant dans sa périphérie avec une profondeur qui s'étend essentiellement dans le sens périphérique et dans laquelle est introduite une extrémité des organes de pinçage (12, 12', 12"), et que pour commander les organes de pinçage, ceux-ci sont engagés, par leur extrémité opposée à la fente, dans la périphérie d'un disque (17) pouvant tourner sur l'axe de tambour (2) et par rapport à ce dernier, qui porte, sur sa face externe, un premier élément d'arrêt (19) tournant avec lui, qui coopère élastiquement avec un second élément d'arrêt (20) monté sur l'enveloppe de la machine, d'une manière telle que, lorsque le tambour (1) tourne dans le sens de l'impression (9), les deux éléments d'arrêt glissent l'un sur l'autre et lorsque le tambour tourne dans le sens opposé, ils bloquent la rotation du disque (17), ce qui a pour effet de bander un ressort de traction (14) disposé entre le disque et le tambour.
2. Machine suivant la revendication 1, caractérisé en ce que le tambour (1) comporte une fente (11) qui s'enfonce dans sa partie interne et qui s'étend sur la totalité de sa longueur.
3. Machine suivant la revendication 1 ou 2, caractérisé en ce que les organes de pinçage (12, 12', 12") et les disques (17) sont montés aux deux faces d'about du tambour (1).
4. Machine suivant les revendications 2 et 3, caractérisée en ce qu'en lieu et place d'organes de pinçage individuels (12, 12', 12") est prévu un rail de pinçage (12b) qui s'étend sur toute la longueur de la fente (11).
5. Machine suivant l'une quelconque des revendications 1 à 4, caractérisée en ce que les organes de pinçage (12,12', 12") ou le rail de pinçage (12b) sont pourvus, au niveau de leur côté tourné vers la feuille (3), de pointes ou de languettes élastiques (12c) pour améliorer le maintien de la feuille.
6. Machine suivant l'une quelconque des revendications 1 à 5, caractérisée en ce que le premier élément d'arrêt (19) est axialement élastique.
7. Machine suivant l'une quelconque des revendications 1 à 6, caractérisée en ce qu'à titre de moyens de guidage sont prévues des tôles de guidage (1a, 1a') enveloppant au moins partiellement le tambour (1) à la manière d'une chemise cylindrique.
EP83201856A 1983-01-08 1983-12-29 Imprimante avec rentrage de papier automatique Expired EP0116187B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3300458 1983-01-08
DE19833300458 DE3300458A1 (de) 1983-01-08 1983-01-08 Drucker mit automatischem papiereinzug

Publications (3)

Publication Number Publication Date
EP0116187A2 EP0116187A2 (fr) 1984-08-22
EP0116187A3 EP0116187A3 (en) 1985-05-29
EP0116187B1 true EP0116187B1 (fr) 1988-03-09

Family

ID=6187904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83201856A Expired EP0116187B1 (fr) 1983-01-08 1983-12-29 Imprimante avec rentrage de papier automatique

Country Status (5)

Country Link
US (1) US4543004A (fr)
EP (1) EP0116187B1 (fr)
JP (1) JPH071915B2 (fr)
CA (1) CA1218952A (fr)
DE (2) DE3300458A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6151393A (ja) * 1984-08-22 1986-03-13 Hitachi Ltd 熱転写記録装置
JPH0425344Y2 (fr) * 1984-10-27 1992-06-17
US4627754A (en) * 1985-08-13 1986-12-09 Sanders Associates, Inc. Drum clamping mechanism for a printer
US4594597A (en) * 1985-08-13 1986-06-10 Sanders Associates, Inc. Thermal printer
US4751519A (en) * 1985-09-25 1988-06-14 Sharp Kabushiki Kaisha Reciprocating recording paper in recording apparatus
JPS63176165A (ja) * 1987-01-16 1988-07-20 Nippon I C S Kk 単票用紙の表裏両面印字用プリンタ装置
US4723133A (en) * 1987-02-12 1988-02-02 Eastman Kodak Company Card ejecting apparatus
US4824096A (en) * 1987-07-17 1989-04-25 Polaroid Corporation Sheet clamp counterbalancing system for high speed sheet handling drums
JPH01278381A (ja) * 1988-05-02 1989-11-08 Mitsubishi Electric Corp プリンタの記録紙クランプ装置
KR920002844B1 (ko) * 1989-06-22 1992-04-06 삼성전자주식회사 비디오 프린터의 용지홀더
US5009509A (en) * 1989-12-26 1991-04-23 Eastman Kodak Company Clamping apparatus for thermal transfer printer
JP2741934B2 (ja) * 1990-01-10 1998-04-22 株式会社日立製作所 感熱転写記録装置のプラテンロック機構
EP0518674B1 (fr) * 1991-06-12 2002-09-18 Xerox Corporation Ensemble avec imprimante à jet d'encre et procédé correspondant
KR0160613B1 (ko) * 1992-08-06 1999-01-15 강진구 화상형성장치

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR865719A (fr) * 1941-06-10
US1508951A (en) * 1923-06-01 1924-09-16 Alexander F Baker Tympan clamp
US2056922A (en) * 1934-10-20 1936-10-06 Willard Mfg Corp Gripper mechanism for printing presses
US2288290A (en) * 1940-03-09 1942-06-30 Ditto Inc Sheet clamping means for duplicating machines
US2865289A (en) * 1956-10-03 1958-12-23 Dick Co Ab Gripper construction for duplicators
US3221652A (en) * 1963-12-19 1965-12-07 Mestre Luis Impression cylinder combination for a press
US3474889A (en) * 1967-04-27 1969-10-28 Friden Inc Card clamp for typewriter platens
JPS5214567A (en) * 1975-07-25 1977-02-03 Nippon Steel Corp Method of manufacture of electriccweld high tension steel pipe
JPS5367718U (fr) * 1976-11-09 1978-06-07
DE2713333C3 (de) * 1977-03-25 1981-12-10 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur Führung des Papiers beim Papiertransport in Druckgeräten, insbesondere bei Fernschreibmaschinen

Also Published As

Publication number Publication date
US4543004A (en) 1985-09-24
CA1218952A (fr) 1987-03-10
DE3375891D1 (en) 1988-04-14
JPS59140771A (ja) 1984-08-13
DE3300458A1 (de) 1984-07-12
EP0116187A3 (en) 1985-05-29
JPH071915B2 (ja) 1995-01-11
EP0116187A2 (fr) 1984-08-22

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