EP0571571B1 - Inking-pad printing press - Google Patents

Inking-pad printing press Download PDF

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Publication number
EP0571571B1
EP0571571B1 EP92923654A EP92923654A EP0571571B1 EP 0571571 B1 EP0571571 B1 EP 0571571B1 EP 92923654 A EP92923654 A EP 92923654A EP 92923654 A EP92923654 A EP 92923654A EP 0571571 B1 EP0571571 B1 EP 0571571B1
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EP
European Patent Office
Prior art keywords
reservoir
inking
printing press
pad printing
container
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Expired - Lifetime
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EP92923654A
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German (de)
French (fr)
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EP0571571A1 (en
Inventor
Louis Bachmann
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/001—Pad printing apparatus or machines

Definitions

  • the invention relates to a pad printing machine according to the preamble of independent patent claim 1.
  • a machine of this type has become known from DE-C-1 923 374.
  • This has an ink container open at the bottom, which rests on a reciprocating gravure printing plate, also called a cliché.
  • the paint container has a wedge-shaped edge at the bottom of an edge resting on the plate. When the container is full, this color is applied when the printing plate is moved. After a color application, the stamp is transferred to a print item using a stamp. It is essential that the container is constantly pressed resiliently against the pressure plate, which is done here with a helical compression spring.
  • a similar pad printing machine is known from DE-A-37 37 937, in which the ink container is designed in the area of its end face in such a way that it can bend or twist in this area.
  • an elastic seal in the form of an O-ring is used, for example, in the paint container above the end face.
  • a pressing device is provided here, which has three points acting essentially diametrically opposite, upward-facing surfaces of the hollow body. These points are arranged on a pressure ring on which a pressure force is applied at two points on a diameter line.
  • a tampon printing machine is also known in the prior art, in which the ink container by means of a magnet is pressed against the pressure plate. With this, an oblique pressure plate is not a problem in itself. However, there are now many colors that chemically and physically unfavorably change in a magnetic field, and which therefore cannot be used in such a machine. With such a machine, the selection of suitable colors is therefore comparatively small.
  • the invention has for its object to provide a tampon printing machine of the type mentioned, which is structurally simpler and in particular does not require a separate pressure ring and which nevertheless delivers excellent printing results even with an inclined printing plate.
  • the paint container should be easy to assemble and replace and should also be easy to manufacture.
  • the object is achieved by the invention according to claim 1.
  • the subject of a subsidiary claim is an ink container particularly suitable for the tampon printing machine.
  • the pressing device is connected to the interior of the ink container.
  • the contact pressure can then be applied exactly on the center line to the end face and near the pressure plate. This point is then as far away as possible from all points on the end face and the contact pressure is thus distributed evenly over the end face.
  • a pressure ring that distributes the pressure force over several points is therefore not necessary here.
  • the outside of the paint container has no parts for fastening the pressure device and that it is therefore freely accessible from the side for mounting and replacement.
  • the contact pressure is evenly distributed over the face of the paint container if it does not have hard material such as hardened steel.
  • the container can be pivoted in all directions with respect to the pressing device, as in the case of a ball joint.
  • the ink tank can then adapt to any inclination of the printing plate. According to a further embodiment of the invention, this is achieved by a ball-and-socket bearing.
  • a particularly simple and suitable joint connection is created according to a further development of the invention in that a cover of the paint container has a recess on the top side, in which a hemisphere socket is arranged, which forms a joint with a ball pin inserted into this opening.
  • the ball pin is preferably inserted loosely from above into this preferably cylindrical recess.
  • a particularly simple pressing device has one, for example pneumatic cylinder, with the free end of the piston being articulated to the paint container. The contact pressure is then exerted by this pressure cylinder. To replace the paint container, simply hold the paint container and retract the piston. The contact pressure of the cylinder can be checked and adjusted periodically with a suitable control device.
  • a major advantage of the tampon printing machine according to the invention is further seen in the fact that it is also possible to work with non-circular, for example elliptical, angular and in particular rhombic ink containers. These containers are then preferably held at at least two spaced locations.
  • the pad printing machine shown in FIGS. 1, 3 and 4 has a housing 1 with a bottom 1a, on which a carriage guide 3 for a reciprocable carriage 2 with a carrier 4 and a pressure plate 6 is attached.
  • the pressure plate 6, also called cliché, is inserted from above into the carrier 4 and this is in turn fixed with screws 5 on the carriage 2.
  • the carriage 2 for coloring the printing plate 6 is moved from the position shown in solid lines in FIG. 3 to the dash-dotted position and then brought back to the original position. If the printing plate 6 is colored, the ink remaining on the printing plate 6 is transferred to the object to be printed with a tampon 40.
  • an ink container 7 is provided which is open at the bottom and rests below with a circumferential and comparatively sharp edge 8 under vertical pressure on the upper side 6a of the printing plate 6. Inside the container 7 is filled with ink, not shown here, which is applied when the carriage 2 is moved into the position 2 'shown in FIG. 3 and is scraped off by means of the edge 8 during the return movement.
  • ink not shown here
  • An embodiment is also conceivable here in which the carriage 2 is fixed with respect to the housing 1 and the container 7 is moved. The relative displacement between the container 7 and the slide 2 or the pressure plate 6 is therefore essential.
  • edge 8 lies evenly over the entire circumference on the upper side 6a and this even if, as shown in FIG. 2b, the upper side 6a 'is flat but not horizontal. Even an inclination that is significantly less than the inclination shown exaggerated in FIG. 2b inevitably leads to an unsatisfactory pressure if this is caused by an uneven pressure of the edge 8 over the circumference.
  • An inclination of the upper side 6a can have different causes, for example an inaccurate machining of the pressure plate 6, inaccuracies in the guide 3 or tolerance deviations on the slide 2.
  • the surface 6a can thus be inclined in all directions.
  • the ink container 7 can adapt in all directions to a possibly inclined upper side 6a of the pressure plate 6 ', this has an extension 9 which extends into the interior of the ink container 7 and which has a recess 19 which is connected to a piston 15 of a pneumatic Cylinder 12 forms a ball pin bearing.
  • the pneumatic pressure cylinder 12 is fixed to the housing 1 with a fastening part 10 and screws 11.
  • the paint container 7 is thus held by the piston 15, so that the paint container 7 is not moved horizontally when the carriage 2 is displaced.
  • the projection 9 is arranged centrally with respect to a cylindrical wall 17 and also with respect to the edge 8 and is integrally formed on a ceiling wall 18.
  • the recess 19 is cylindrical at the top and merges in the lower region of the projection 9 into a hemisphere socket 19a, against which an articulated ball 15a of the piston 15 slidably abuts.
  • the ball 15a merges via a neck 15b into a cylindrical part 15c which has an outer diameter which is slightly smaller than the inner diameter of a cylindrical region 19b of the depression 19.
  • the longitudinal axis A) of the depression 19 is thus limited in all directions with respect to the Longitudinal axis B) of the piston 15 is pivotable. Since, as mentioned above, any inclination of the upper side 6a is generally only very slight, a correspondingly slight pivotability is sufficient here.
  • the piston 15 presses on the hemisphere socket 19a from above with a force which is exerted essentially constantly by the pressure cylinder 12.
  • the cylinder 12 is connected via ports 14 to valves (not shown here) and a suitable control.
  • the use of a pressure cylinder 12 has the essential advantage that the contact pressure of the piston 15 and thus the ink container 7 can be automatically monitored and controlled.
  • the piston 15 is moved upwards by actuating the cylinder 12 into the position shown in dash-dotted lines in FIG. 1.
  • the container 7 can then be removed from the slide with the carrier 4 after the screws 5 have been removed.
  • the new ink container is then inserted into the carriage 2 with the carrier 4 and the pressure plate 6.
  • the piston 15 is then moved downward from the retracted position and its lower end is inserted into the recess 19b. After fixing the carrier 4 with the screws 5, the machine is ready again.
  • the desired contact pressure is set independently by the pneumatic control device. Tensioning or re-tensioning a spring with levers and the like is therefore not necessary here.
  • the projection 9 extends downward into the interior of the container 7, as can be seen, it is very easily possible to comparatively near the top 6a at the point at which the piston 15 acts on the container 7 to arrange. At the same time, however, this attachment point is comparatively far away from the edge 8 and, in relation to this, is as far away as possible everywhere. This prevents the edge 8 from being deformed by an asymmetrical force effect.
  • an opening 16 is provided for pressure equalization in a known manner.
  • 5 and 6 or 5a and 6a show two paint containers 20 and 30 which, in contrast to the circular container 7, are elongated.
  • the container 20 is approximately elliptical when viewed from above and the container 30 is hexagonal. A rectangular and elongated container is also conceivable. In these containers, too, an opening 23 or 33 is provided for pressure equalization.
  • the containers 20 and 30 are held with at least two pressure cylinders 12 in such a way that the pressure plate 6 is moved in the direction of the shorter diameter.
  • the elongated shape of the pressure container 20 or 30 has the advantage that the movements of the pressure plate 6 can be kept shorter compared to a circular design with the same content.
  • two approaches 24 and 34 are provided here, which are arranged at a distance from one another and as symmetrically as possible.
  • the lugs 24 are arranged approximately where the focal points of a corresponding ellipse are located.
  • the approaches 24 and 34 also have one Recess 26 or 36 open at the top into which a piston 15 is inserted.
  • the ball pans are formed here by inserts 25 and 35, respectively.
  • the container 20 or 30 can adapt to an inclined upper side 6a, the axes of the pistons 15 then being inclined to the corresponding axes of the projections 24 or 34. If the connecting line of the two lugs 24 and 34 is also inclined, the pistons automatically adapt to this inclination by correspondingly moving in or out.
  • the containers 20 and 30 have a lower edge 22 or 32, which each consists of a different material than the remaining part 21 or 31 of the container 20 or 30.
  • the edge 22 or 32 can be made of ceramic, for example.
  • the containers 20 and 30 can also be made in one piece from a suitable plastic, as is also provided for the container 7.
  • connection between the container and the piston or pistons 15 is a ball joint.
  • other known joints are also possible which permit a similar movement between the piston or pistons 15 and the paint container. It is important here, however, that a substantial proportion of the force to be exerted on the container 7 acts on the container 7 within it.
  • An embodiment is also conceivable in which the pneumatic pressure cylinder 12 is replaced by other similarly acting means, for example by a compression spring.

Landscapes

  • Printing Methods (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Bedding Items (AREA)
  • Paper (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Abstract

The inking-pad printing press proposed has an ink reservoir (7) which is open underneath and which is pressed by a piston/cylinder unit on to a mobile printing plate (6). The reservoir (7) is connected by an articulated joint to the piston (15) of the piston/cylinder unit (12), the articulated joint being located inside the reservoir (7), near the upper surface of the printing plate (6). If the upper surface of the printing plate (6) is inclined at an angle, the ink reservoir (7) can adjust itself in any direction to the plate inclination so that a uniform pressure is exerted by the whole of the end of the ink reservoir (7). Thus even if the upper surface of the printing plate is inclined, the printing quality is excellent.

Description

Die Erfindung betrifft eine Tampondruckmaschine nach dem Oberbegriff des unabhängigen Patentanspruchs 1.The invention relates to a pad printing machine according to the preamble of independent patent claim 1.

Eine Maschine dieser Art ist aus der DE-C-1 923 374 bekannt geworden. Diese weist einen unten offenen Farbbehälter auf, der auf einer hin- und herbeweglichen Tiefdruckplatte, auch Klischee genannt, aufliegt. Der Farbbehälter besitzt unten an einem auf der Platten anliegenden Rand eine keilförmig zugeschärfte Kante. Bei gefülltem Behälter wird bei einer Verschiebung der Druckplatte auf diese Farbe aufgetragen. Mittels eines Stempels wird nach einem Farbauftrag das Druckbild auf ein Druckgut übertragen. Wesentlich ist, dass der Behälter ständig federnd gegen die Druckplatte gepresst wird, was hier mit einer Schraubendruckfeder erfolgt.A machine of this type has become known from DE-C-1 923 374. This has an ink container open at the bottom, which rests on a reciprocating gravure printing plate, also called a cliché. The paint container has a wedge-shaped edge at the bottom of an edge resting on the plate. When the container is full, this color is applied when the printing plate is moved. After a color application, the stamp is transferred to a print item using a stamp. It is essential that the container is constantly pressed resiliently against the pressure plate, which is done here with a helical compression spring.

Ist nun bei einer solchen Maschine die Oberseite der Druckplatte bezüglich des Farbbehälters schief, beispielsweise in Folge eines Montagefehlers oder eines Fehlers des Schlittens auf welchem die Druckplatte montiert ist, so führt dies zu einem ungleichmässigen Farbauftrag und schliesslich zu einem nicht befriedigenden Druck.If the upper side of the printing plate is skewed with respect to the ink container in such a machine, for example as a result of an assembly error or an error in the slide on which the printing plate is mounted, this leads to an uneven application of color and finally an unsatisfactory print.

Durch die DE-A-37 37 937 ist eine ähnlich Tampondruckmaschine bekannt geworden, bei welcher der Farbbehälter so im Bereich seiner Stirnfläche ausgebildet ist, dass er sich in diesem Bereich verbiegen oder verwinden kann. Dazu ist beispielsweise im Farbbehälter über der Stirnfläche eine elastische Dichtung in Form eines O-Ringes eingesetzt. Weiter ist hier eine Anpressvorrichtung vorgesehen, die drei im wesentlichen einander diametral gegenüberliegende, nach oben weisende Flächen des Hohlkörpers wirkende Punkte aufweist. Diese Punkte sind an einem Anpressring angeordnet, auf dem eine Anpresskraft an zwei Punkten einer Durchmesserlinie angebracht sind. Mit diesen konstruktiv recht aufwendigen Massnahmen soll eine Entkuppelung zwischen dem unteren Bereich und dem oberen Bereich des Farbbehälters und schliesslich eine Anpassung der Stirnfläche des Farbbehälters an ein schiefes oder unebenes Klischee möglich sein. Als wichtig wird hier angesehen, dass der Farbbehälter in der Nähe der Stirnfläche gehalten ist. Damit die Anpresskraft einigermassen gleichmässig auf die Stirnfläche des Farbbehälters verteilt wird, ist hier somit ein zusätzlicher Anpressring vorgesehen.A similar pad printing machine is known from DE-A-37 37 937, in which the ink container is designed in the area of its end face in such a way that it can bend or twist in this area. For this purpose, an elastic seal in the form of an O-ring is used, for example, in the paint container above the end face. Furthermore, a pressing device is provided here, which has three points acting essentially diametrically opposite, upward-facing surfaces of the hollow body. These points are arranged on a pressure ring on which a pressure force is applied at two points on a diameter line. With these constructively complex measures, a decoupling between the lower area and the upper area of the paint container and finally an adaptation of the face of the paint container to a crooked or uneven cliché should be possible. It is considered important here that the paint container is held close to the face. An additional pressure ring is thus provided so that the pressure force is distributed to some extent evenly on the front surface of the paint container.

Im Stand der Technik ist auch eine Tampondruckmaschine bekannt, bei welcher der Farbbehälter mittels eines Magneten gegen die Druckplatte gepresst wird. Bei dieser ist eine schiefe Druckplatte an sich kein Problem. Es gibt nun aber viele Farben, die sich in einem magnetischen Feld chemisch und physikalisch ungünstig verändern, und die in einer solchen Maschine deshalb nicht verwendet werden können. Die Auswahl geeigneter Farben ist bei einer solchen Maschine deshalb vergleichsweise klein.A tampon printing machine is also known in the prior art, in which the ink container by means of a magnet is pressed against the pressure plate. With this, an oblique pressure plate is not a problem in itself. However, there are now many colors that chemically and physically unfavorably change in a magnetic field, and which therefore cannot be used in such a machine. With such a machine, the selection of suitable colors is therefore comparatively small.

Der Erfindung liegt die Aufgabe zugrunde, eine Tampondruckmaschine der genannten Art zu schaffen, die konstruktiv einfacher ist und insbesondere ohne separaten Anpressring auskommt und die dennoch auch bei schiefer Druckplatte hervorragende Druckergebnisse liefert. Der Farbbehälter soll einfach montiert und ausgewechselt werden können und soll auch sonst einfach herstellbar sein. Die Aufgabe ist durch die Erfindung gemäss Anspruch 1 gelöst. Gegenstand eines Nebenanspruches ist ein für die Tampondruck-Maschine besonders geeigneter Farbbehälter.The invention has for its object to provide a tampon printing machine of the type mentioned, which is structurally simpler and in particular does not require a separate pressure ring and which nevertheless delivers excellent printing results even with an inclined printing plate. The paint container should be easy to assemble and replace and should also be easy to manufacture. The object is achieved by the invention according to claim 1. The subject of a subsidiary claim is an ink container particularly suitable for the tampon printing machine.

Bei der erfindungsgemässen Tampondruckmaschine ist die Anpressvorrichtung im Innern des Farbbehälters mit diesem verbunden. Bei einem Farbbehälter mit kreisrunder Stirnfläche kann dann die Anpresskraft genau auf der Mittellinie zur Stirnfläche und nahe der Druckplatte aufgebracht werden. Dieser Punkt ist dann von allen Punkten der Stirnfläche soweit möglich gleich weit entfernt und damit wird die Anpresskraft gleichmässig auf die Stirnfläche verteilt. Ein Anpressring, der die Anpresskraft auf mehrere Punkte verteilt, ist hier somit nicht erforderlich.In the tampon printing machine according to the invention, the pressing device is connected to the interior of the ink container. In the case of a paint container with a circular end face, the contact pressure can then be applied exactly on the center line to the end face and near the pressure plate. This point is then as far away as possible from all points on the end face and the contact pressure is thus distributed evenly over the end face. A pressure ring that distributes the pressure force over several points is therefore not necessary here.

Vorteilhaft ist auch, dass die Aussenseite des Farbbehälters keine Teile zur Befestigung der Anpressvorrichtung aufweist und dass dieser deshalb zum Montieren und Auswechseln seitlich frei zugänglich ist. Die Anpresskraft ist auch dann gleichmässig auf die Stirnfläche des Farbbehälters verteilt, wenn diese nicht hartes Material wie beispielsweise gehärteten Stahl aufweist. Bei der erfindungsgemässen Tampondruckmaschine ist es ebenfalls möglich, die Anpresskraft nahe der Oberseite der Druckplatte auf den Farbbehälter auszuüben.It is also advantageous that the outside of the paint container has no parts for fastening the pressure device and that it is therefore freely accessible from the side for mounting and replacement. The contact pressure is evenly distributed over the face of the paint container if it does not have hard material such as hardened steel. In the tampon printing machine according to the invention, it is also possible to exert the contact pressure on the ink container near the top of the printing plate.

Nach einer Weiterbildung der Erfindung ist vorgesehen, dass der Behälter bezüglich der Anpressvorrichtung wie bei einem Kugelgelenk in allen Richtungen verschwenkbar ist. Der Farbbehälter kann sich dann einer eventuellen Neigung der Druckplatte anpassen. Dies wird nach einer weiteren Ausgestaltung der Erfindung durch ein Kugelzapfenlager realisiert.According to a development of the invention, it is provided that the container can be pivoted in all directions with respect to the pressing device, as in the case of a ball joint. The ink tank can then adapt to any inclination of the printing plate. According to a further embodiment of the invention, this is achieved by a ball-and-socket bearing.

Eine besonders einfache und geeignete Gelenkverbindung wird nach einer Weiterbildung der Erfindung dadurch geschaffen, dass eine Abdeckung des Farbbehälters oberseitig eine Vertiefung aufweist, in welche eine Halbkugelpfanne angeordnet ist, die mit einem in diese Öffnung eingesetzten Kugelzapfen ein Gelenk bildet. Vorzugsweise ist der Kugelzapfen von oben lose in diese vorzugsweise zylindrische Ausnehmung eingesetzt. Eine besonders einfache Anpressvorrichtung weist einen beispielsweise pneumatischen Zylinder auf, wobei das freie Ende des Kolbens gelenkig mit dem Farbbehälter verbunden ist. Die Anpresskraft wird dann durch diesen Druckzylinder ausgeübt. Zum Auswechseln des Farbbehälters muss dann lediglich der Farbbehälter festgehalten und der Kolben eingefahren werden. Mit einer geeigneten Steuereinrichtung kann die Anpresskraft des Zylinders periodisch überprüft und eingestellt werden.A particularly simple and suitable joint connection is created according to a further development of the invention in that a cover of the paint container has a recess on the top side, in which a hemisphere socket is arranged, which forms a joint with a ball pin inserted into this opening. The ball pin is preferably inserted loosely from above into this preferably cylindrical recess. A particularly simple pressing device has one, for example pneumatic cylinder, with the free end of the piston being articulated to the paint container. The contact pressure is then exerted by this pressure cylinder. To replace the paint container, simply hold the paint container and retract the piston. The contact pressure of the cylinder can be checked and adjusted periodically with a suitable control device.

Ein wesentlicher Vorteil der erfindungsgemässen Tampondruck-Maschine wird weiter darin gesehen, dass auch mit unrunden, beispielsweise elliptischen, eckigen und insbesondere rhombischen Farbbehältern gearbeitet werden kann. Diese Behälter werden dann vorzugsweise an wenigstens zwei im Abstand zueinander angeordneten Stellen gehalten.A major advantage of the tampon printing machine according to the invention is further seen in the fact that it is also possible to work with non-circular, for example elliptical, angular and in particular rhombic ink containers. These containers are then preferably held at at least two spaced locations.

Weitere vorteilhafte Merkmale ergeben sich aus den abhängigen Ansprüchen, der nachfolgenden Beschreibung sowie der Zeichnung. Ausführungsbeispiele der erfindungsgemässen Tampondruckmaschine werden anhand der Zeichnung nachfolgend näher erläutert.
Es zeigen:

Fig. 1
eine Ansicht einer teilweise geschnittenen Tampondruckmaschine gemäss der Erfindung,
Fig. 2a und 2b
jeweils ein Vertikalschnitt durch einen Farbbehälter, ein Klischee und einen Klischeehalter,
Fig. 3
eine Seitenansicht der erfindungsgemässen Tampondruckmaschine,
Fig. 4
eine weitere Ansicht der teilweise geschnittenen Tampondruckmaschine,
Fig. 5a und 5b
Vertikalschnitt und Grundriss eines Farbbehälters nach einer Variante
Fig. 6a und 6b
Vertikalschnitt und Grundriss eines Farbbehälters nach einer weiteren Variante.
Further advantageous features result from the dependent claims, the following description and the drawing. Exemplary embodiments of the pad printing machine according to the invention are explained in more detail below with reference to the drawing.
Show it:
Fig. 1
2 shows a view of a partially cut pad printing machine according to the invention,
2a and 2b
a vertical section through a paint container, a plate and a plate holder,
Fig. 3
a side view of the pad printing machine according to the invention,
Fig. 4
another view of the partially cut pad printing machine,
5a and 5b
Vertical section and floor plan of a paint container according to a variant
6a and 6b
Vertical section and floor plan of a paint container according to another variant.

Die in den Fig. 1, 3 und 4 gezeigte Tampondruckmaschine weist ein Gehäuse 1 mit einem Boden 1a auf, auf dem eine Schlittenführung 3 für einen hin- und herbewegbaren Schlitten 2 mit einem Träger 4 und einer Druckplatte 6 angebracht ist. Die Druckplatte 6, auch Klischee genannt, ist von oben in den Träger 4 eingesetzt und dieser ist wiederum mit Schrauben 5 auf dem Schlitten 2 fixiert. Mit einem hier nicht gezeigten Antrieb wird der Schlitten 2 zum Einfärben der Druckplatte 6 von der in Fig. 3 mit ausgezogenen Linien gezeigten Position in die strich-punktierte Position gefahren und dann wieder in die ursprüngliche Position gebracht. Ist die Druckplatte 6 eingefärbt, so wird mit einem Tampon 40 die auf der Druckplatte 6 zurückgebliebene Farbe auf den zu bedruckenden Gegenstand übertragen.The pad printing machine shown in FIGS. 1, 3 and 4 has a housing 1 with a bottom 1a, on which a carriage guide 3 for a reciprocable carriage 2 with a carrier 4 and a pressure plate 6 is attached. The pressure plate 6, also called cliché, is inserted from above into the carrier 4 and this is in turn fixed with screws 5 on the carriage 2. With a drive, not shown here, the carriage 2 for coloring the printing plate 6 is moved from the position shown in solid lines in FIG. 3 to the dash-dotted position and then brought back to the original position. If the printing plate 6 is colored, the ink remaining on the printing plate 6 is transferred to the object to be printed with a tampon 40.

Zum Einfärben der Druckplatte 6 ist ein Farbbehälter 7 vorgesehen, der unten offen ist und unten mit einer umlaufenden und vergleichsweise scharfen Kante 8 unter vertikalem Druck auf der Oberseite 6a der Druckplatte 6 aufliegt. Im Innern des Behälters 7 ist hier nicht gezeigte Farbe eingefüllt, die bei der Bewegung des Schlittens 2 in die in Fig. 3 gezeigte Position 2' aufgetragen und bei der Rückbewegung mittels der Kante 8 abgerakelt wird. Denkbar ist hier auch eine Ausführung, bei welcher der Schlitten 2 bezüglich des Gehäuses 1 feststeht und der Behälter 7 bewegt wird. Wesentlich ist somit die relative Verschiebung zwischen dem Behälter 7 und dem Schlitten 2 bzw. der Druckplatte 6.For inking the printing plate 6, an ink container 7 is provided which is open at the bottom and rests below with a circumferential and comparatively sharp edge 8 under vertical pressure on the upper side 6a of the printing plate 6. Inside the container 7 is filled with ink, not shown here, which is applied when the carriage 2 is moved into the position 2 'shown in FIG. 3 and is scraped off by means of the edge 8 during the return movement. An embodiment is also conceivable here in which the carriage 2 is fixed with respect to the housing 1 and the container 7 is moved. The relative displacement between the container 7 and the slide 2 or the pressure plate 6 is therefore essential.

Wesentlich ist auch, dass die Kante 8 über den ganzen Umfang gleichmässig auf der Oberseite 6a aufliegt und dies auch dann, wenn, wie in Fig. 2b gezeigt, die Oberseite 6a' zwar eben aber nicht horizontal ist. Auch eine Neigung die wesentlich geringer ist als die in Fig. 2b übertrieben gezeigte Neigung, führt unweigerlich zu einem unbefriedigenden Druck, wenn diese einen ungleichmässigen Andruck der Kante 8 über den Umfang gesehen zur Ursache hat. Eine Neigung der Oberseite 6a kann unterschiedliche Ursachen haben, beispielsweise eine ungenaue Bearbeitung der Druckplatte 6, Ungenauigkeiten der Führung 3 oder auch Toleranzabweichungen am Schlitten 2. Die Oberfläche 6a kann somit in allen Richtungen geneigt sein. Damit sich der Farbbehälter 7 in allen Richtungen an eine eventuell geneigte Oberseite 6a der Druckplatte 6' anpassen kann, weist dieser einen Ansatz 9 auf, der sich ins Innere des Farbbehälters 7 erstreckt und der eine Vertiefung 19 aufweist, die mit einem Kolben 15 eines pneumatischen Zylinders 12 ein Kugelzapfenlager bildet. Der pneumatische Druckzylinder 12 ist mit einem Befestigungteil 10 und Schrauben 11 fest am Gehäuse 1 fixiert.It is also essential that the edge 8 lies evenly over the entire circumference on the upper side 6a and this even if, as shown in FIG. 2b, the upper side 6a 'is flat but not horizontal. Even an inclination that is significantly less than the inclination shown exaggerated in FIG. 2b inevitably leads to an unsatisfactory pressure if this is caused by an uneven pressure of the edge 8 over the circumference. An inclination of the upper side 6a can have different causes, for example an inaccurate machining of the pressure plate 6, inaccuracies in the guide 3 or tolerance deviations on the slide 2. The surface 6a can thus be inclined in all directions. So that the ink container 7 can adapt in all directions to a possibly inclined upper side 6a of the pressure plate 6 ', this has an extension 9 which extends into the interior of the ink container 7 and which has a recess 19 which is connected to a piston 15 of a pneumatic Cylinder 12 forms a ball pin bearing. The pneumatic pressure cylinder 12 is fixed to the housing 1 with a fastening part 10 and screws 11.

Der Farbbehälter 7 wird somit durch den Kolben 15 festgehalten, sodass bei einer Verschiebung des Schlittens 2 der Farbbehälter 7 horizontal nicht bewegt wird. Der Ansatz 9 ist bezüglich einer zylindrischen Wandung 17 und auch bezüglich der Kante 8 mittig angeordnet und an einer Deckenwandung 18 angeformt. Die Vertiefung 19 ist oben zylindrisch und geht im unteren Bereich des Ansatzes 9 in eine Halbkugelpfanne 19a über, an welcher eine Gelenkkugel 15a des Kolbens 15 gleitbar anliegt. Die Kugel 15a geht über einen Hals 15b in einen zylindrischen Teil 15c über, der einen Aussendurchmesser aufweist, welcher etwas kleiner ist als der Innendurchmesser eines zylindrischen Bereiches 19b der Vertiefung 19. Die Längsachse A) der Vertiefung 19 ist somit in allen Richtungen begrenzt bezüglich der Längsachse B) des Kolbens 15 verschwenkbar. Da wie oben erwähnt eine eventuelle Neigung der Oberseite 6a in der Regel nur sehr geringfügig ist, genügt hier eine entsprechend geringfügige Schwenkbarkeit.The paint container 7 is thus held by the piston 15, so that the paint container 7 is not moved horizontally when the carriage 2 is displaced. The projection 9 is arranged centrally with respect to a cylindrical wall 17 and also with respect to the edge 8 and is integrally formed on a ceiling wall 18. The recess 19 is cylindrical at the top and merges in the lower region of the projection 9 into a hemisphere socket 19a, against which an articulated ball 15a of the piston 15 slidably abuts. The ball 15a merges via a neck 15b into a cylindrical part 15c which has an outer diameter which is slightly smaller than the inner diameter of a cylindrical region 19b of the depression 19. The longitudinal axis A) of the depression 19 is thus limited in all directions with respect to the Longitudinal axis B) of the piston 15 is pivotable. Since, as mentioned above, any inclination of the upper side 6a is generally only very slight, a correspondingly slight pivotability is sufficient here.

Der Kolben 15 drückt von oben auf die Halbkugelpfanne 19a mit einer Kraft, die im wesentlichen konstant durch den Druckzylinder 12 ausgeübt wird. Dazu ist der Zylinder 12 über Anschlüsse 14 mit hier nicht gezeigten Ventilen und einer geeigneten Steuerung verbunden. Die Verwendung eines Druckzylinder 12 hat hier den wesentlichen Vorteil, dass die Anpresskraft des Kolbens 15 und damit des Farbbehälters 7 automatisch überwacht und gesteuert werden kann.The piston 15 presses on the hemisphere socket 19a from above with a force which is exerted essentially constantly by the pressure cylinder 12. For this purpose, the cylinder 12 is connected via ports 14 to valves (not shown here) and a suitable control. The use of a pressure cylinder 12 has the essential advantage that the contact pressure of the piston 15 and thus the ink container 7 can be automatically monitored and controlled.

Wesentlich ist nun, dass der Anpressdruck zur Schonung des Behälters 7 und der Druckplatte 6 vergleichsweise klein gehalten werden kann. Dies wird durch die gleichmässige Auflage der Kante 8 über den gesamten Umfang erreicht. Diese gleichmässige Auflage ist wiederum eine Folge der allseitigen Verschwenkbarkeit des Farbbehälters 7.It is now essential that the contact pressure to protect the container 7 and the pressure plate 6 can be kept comparatively small. This is achieved by uniformly supporting the edge 8 over the entire circumference. This uniform support is in turn a consequence of the pivoting of the paint container 7 on all sides.

Um den Farbbehälter 7 zu wechseln, wird dieser von Hand auf der Druckplatte 6 festgehalten und der Kolben 15 durch eine Betätigung des Zylinder 12 nach oben in die Fig. 1 strich-punktiert gezeigte Lage gefahren. Der Behälter 7 kann dann mit dem Träger 4, nach dem Abnehmen der Schrauben 5, aus dem Schlitten herausgenommen werden. Der neue Farbbehälter wird dann mit dem Träger 4 und der Druckplatte 6 in den Schlitten 2 eingeführt. Anschliessend wird der Kolben 15 dann aus der zurückgezogenen Position nach unten bewegt und sein unteres Ende in die Vertiefung 19b eingeführt. Nach dem Fixieren des Trägers 4 mit den Schrauben 5 ist die Maschine wieder bereit. Durch die pneumatische Steuereinrichtung wird der gewünschte Anpressdruck selbstständig eingestellt. Ein Spannen oder Nachspannen einer Feder mit Hebeln und dergleichen ist hier somit nicht erforderlich.In order to change the ink container 7, it is held by hand on the pressure plate 6 and the piston 15 is moved upwards by actuating the cylinder 12 into the position shown in dash-dotted lines in FIG. 1. The container 7 can then be removed from the slide with the carrier 4 after the screws 5 have been removed. The new ink container is then inserted into the carriage 2 with the carrier 4 and the pressure plate 6. The piston 15 is then moved downward from the retracted position and its lower end is inserted into the recess 19b. After fixing the carrier 4 with the screws 5, the machine is ready again. The desired contact pressure is set independently by the pneumatic control device. Tensioning or re-tensioning a spring with levers and the like is therefore not necessary here.

Da der Ansatz 9 sich wie ersichtlich nach unten in das Innere des Behälters 7 erstreckt, ist es sehr einfach möglich, die Stelle, an welcher der Kolben 15 auf den Behälter 7 wirkt, vergleichsweise nahe der Oberseite 6a anzuordnen. Gleichzeitig ist aber diese Ansatzstelle vergleichsweise weit von der Kante 8 entfernt und bezüglich dieser möglichst überall gleich weit entfernt. Damit wird vermieden, dass die Kante 8 durch eine unsymmetrische Kraftwirkung deformiert wird.Since the projection 9 extends downward into the interior of the container 7, as can be seen, it is very easily possible to comparatively near the top 6a at the point at which the piston 15 acts on the container 7 to arrange. At the same time, however, this attachment point is comparatively far away from the edge 8 and, in relation to this, is as far away as possible everywhere. This prevents the edge 8 from being deformed by an asymmetrical force effect.

In der Wandung 18 des Farbbehälters 7 ist in bekannter Weise eine Öffnung 16 für den Druckausgleich vorgesehen.In the wall 18 of the paint container 7, an opening 16 is provided for pressure equalization in a known manner.

Die Fig. 5 und 6 bzw 5a und 6a zeigen zwei Farbbehälter 20 und 30, die im Gegensatz zum kreisrunden Behälter 7 länglich ausgebildet sind. Der Behälter 20 ist von oben gesehen etwa elliptisch und der Behälter 30 sechseckig. Denkbar ist auch ein rechteckiger und länglicher Behälter. Auch bei diesen Behältern ist eine Öffnung 23 bzw. 33 für den Druckausgleich vorgesehen. Die Behälter 20 und 30 sind mit wenigstens zwei Druckzylindern 12 gehalten und zwar so, dass die Druckplatte 6 in Richtung des kürzeren Durchmessers bewegt wird. Die längliche Form des Druckbehälters 20 bzw. 30 hat den Vorteil, dass gegenüber einer kreisrunden Ausführung mit gleichem Inhalt die Bewegungen der Druckplatte 6 kürzer gehalten werden können. Damit ein Ausgleich an eine eventuell schiefe Oberseite 6a einer Druckplatte gewährleistet und dennoch der Anpressdruck möglichst gleichmässig über den ganzen Bereich der Kante 8 verteilt ist, sind hier jeweils zwei Ansätze 24 und 34 vorgesehen, die im Abstand zueinander und möglichst symmetrisch angeordnet sind. Bei der Ausführung nach Fig. 5 sind die Ansätze 24 etwa dort angeordnet, wo sich etwa die Brennpunkte einer entsprechenden Ellipse befinden. Die Ansätze 24 und 34 besitzen ebenfalls eine oben offene Vertiefung 26 bzw. 36 in die jeweils ein Kolben 15 eingesetzt ist. Die Kugelpfannen werden hier durch Einsätze 25 bzw. 35 gebildet. Auch bei diesen Ausführungen ist gewährleistet, dass sich der Behälter 20 bzw. 30 an eine geneigte Oberseite 6a anpassen kann, wobei dann die Achsen der Kolben 15 schräg zu den entsprechenden Achsen der Ansätze 24 bzw. 34 verlaufen. Ist auch die Verbindungslinie der beiden Ansätze 24 bzw. 34 geneigt, so passen sich die Kolben durch entsprechendes Ein- oder Ausfahren selbsttätig an diese Neigung an.5 and 6 or 5a and 6a show two paint containers 20 and 30 which, in contrast to the circular container 7, are elongated. The container 20 is approximately elliptical when viewed from above and the container 30 is hexagonal. A rectangular and elongated container is also conceivable. In these containers, too, an opening 23 or 33 is provided for pressure equalization. The containers 20 and 30 are held with at least two pressure cylinders 12 in such a way that the pressure plate 6 is moved in the direction of the shorter diameter. The elongated shape of the pressure container 20 or 30 has the advantage that the movements of the pressure plate 6 can be kept shorter compared to a circular design with the same content. So that a compensation on a possibly inclined upper side 6a of a pressure plate is guaranteed and the contact pressure is nevertheless distributed as evenly as possible over the entire area of the edge 8, two approaches 24 and 34 are provided here, which are arranged at a distance from one another and as symmetrically as possible. In the embodiment according to FIG. 5, the lugs 24 are arranged approximately where the focal points of a corresponding ellipse are located. The approaches 24 and 34 also have one Recess 26 or 36 open at the top into which a piston 15 is inserted. The ball pans are formed here by inserts 25 and 35, respectively. In these versions, too, it is ensured that the container 20 or 30 can adapt to an inclined upper side 6a, the axes of the pistons 15 then being inclined to the corresponding axes of the projections 24 or 34. If the connecting line of the two lugs 24 and 34 is also inclined, the pistons automatically adapt to this inclination by correspondingly moving in or out.

Die Behälter 20 und 30 weisen einen unteren Rand 22 bzw. 32 auf, der jeweils aus einem anderen Werkstoff besteht als der übrige Teil 21 bzw. 31 des Behälters 20 bzw. 30. Der Rand 22 bzw. 32 kann beispielsweise aus Keramik hergestellt sein. Die Behälter 20 und 30 können jedoch auch einstückig aus einem geeigneten Kunststoff hergestellt sein, wie dies auch für den Behälter 7 vorgesehen ist.The containers 20 and 30 have a lower edge 22 or 32, which each consists of a different material than the remaining part 21 or 31 of the container 20 or 30. The edge 22 or 32 can be made of ceramic, for example. However, the containers 20 and 30 can also be made in one piece from a suitable plastic, as is also provided for the container 7.

Bei den oben erläuterten Ausführungsbeispielen ist die Verbindung zwischen dem Behälter und dem bzw. den Kolben 15 ein Kugelgelenk. Es sind jedoch auch andere bekannte Gelenke möglich, die eine ähnliche Bewegung zwischen dem bzw. den Kolben 15 und dem Farbbehälter zulassen. Wichtig ist hier jedoch, dass ein wesentlicher Anteil der auf den Behälter 7 auszuübenden Kraft innerhalb des Behälters 7 an diesen angreift. Denkbar ist auch eine Ausführung, bei welcher der pneumatische Druckzylinder 12 durch andere ähnlich wirkende Mittel, beispielsweise durch eine Druckfeder, ersetzt ist.In the exemplary embodiments explained above, the connection between the container and the piston or pistons 15 is a ball joint. However, other known joints are also possible which permit a similar movement between the piston or pistons 15 and the paint container. It is important here, however, that a substantial proportion of the force to be exerted on the container 7 acts on the container 7 within it. An embodiment is also conceivable in which the pneumatic pressure cylinder 12 is replaced by other similarly acting means, for example by a compression spring.

Claims (9)

  1. Inking-pad printing press, having an ink reservoir (7, 20, 30) for inking a printing plate (6) which can be moved to and fro relative to the ink reservoir and having a pressure device (12) for pressing the ink reservoir (7, 20, 30) against the printing plate (6), the ink reservoir (7, 20, 30) being connected in an articulated manner to the pressure device (12), characterized in that the pressure device (12) is connected to the reservoir (7, 20, 30) within the said reservoir.
  2. Inking-pad printing press according to Claim 1, characterized in that the pressure device (12) is connected to the reservoir (7, 20, 30) by a ball-and-socket joint (15a, 16a).
  3. Inking-pad printing press according to Claim 1 or 2, characterized in that in a top wall of the reservoir (7, 20, 30) there is disposed at least one depression (19, 26, 36), which extends downward into the inside of the reservoir and into which an articulated part (15a) of the pressure device engages (12).
  4. Inking-pad printing press according to one of Claims 1 to 3, characterized in that the reservoir (7) is circular in horizontal section and the pressure device (12) is connected centrically to the reservoir (7).
  5. Inking-pad printing press according to one of Claims 1 to 4, characterized in that the pressure device (12) is a pressure cylinder, the piston (15) of the cylinder being detachably connected at its front end to the reservoir (7, 20, 30).
  6. Inking-pad printing press according to Claim 5, characterized in that the pressure cylinder (12) is fixedly connected to a housing (1) of the inking-pad printing press.
  7. Inking-pad printing press according to one of Claims 1 to 6, characterized in that the ink reservoir (20, 30) is of elongated configuration and in that it is connected to the pressure device at at least two mutually spaced locations (25, 35).
  8. Inking-pad printing press according to Claim 7, characterized in that the end face (8) of the reservoir (20) is of roughly elliptical or rectangular configuration and in that within the reservoir (20) there are provided two articulated connections (25) disposed roughly above the focal points.
  9. Reservoir for an inking-pad printing press, characterized by the corresponding features of Claims 1 to 8.
EP92923654A 1991-12-09 1992-12-08 Inking-pad printing press Expired - Lifetime EP0571571B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH03611/91A CH688442A5 (en) 1991-12-09 1991-12-09 Tampon printing machine.
CH3611/91 1991-12-09
PCT/CH1992/000237 WO1993011943A1 (en) 1991-12-09 1992-12-08 Inking-pad printing press

Publications (2)

Publication Number Publication Date
EP0571571A1 EP0571571A1 (en) 1993-12-01
EP0571571B1 true EP0571571B1 (en) 1996-04-03

Family

ID=4259712

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92923654A Expired - Lifetime EP0571571B1 (en) 1991-12-09 1992-12-08 Inking-pad printing press

Country Status (7)

Country Link
EP (1) EP0571571B1 (en)
JP (1) JP3219766B2 (en)
AT (1) ATE136257T1 (en)
AU (1) AU2940192A (en)
CH (1) CH688442A5 (en)
DE (1) DE59205914D1 (en)
WO (1) WO1993011943A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1247647A1 (en) 2001-04-04 2002-10-09 Teca-Print AG Ink cup for inking the printing plate in a pad printing machine

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH688545A5 (en) * 1994-11-18 1997-11-14 Teca Print Ag Method and device for pad printing.
JP2001500072A (en) * 1996-04-03 2001-01-09 テカ・プリント アーゲー Tampon printing machine and printing method using tampon printing machine
DE29615096U1 (en) * 1996-08-30 1996-11-28 Tampoprint GmbH, 70825 Korntal-Münchingen Pad printing machine
US5875716A (en) * 1996-12-05 1999-03-02 Markem Corporation Rotating ink cup
HK1009722A2 (en) * 1998-03-27 1999-05-28 Wang Man Ho An ink cup attachment mechanism
ES2312742T3 (en) * 2002-03-07 2009-03-01 Teca-Print Ag TAMPOGRAPHY PRINTER MACHINE.
JP2012143962A (en) * 2011-01-12 2012-08-02 Mishima Kk Pad printing device
CN110962446B (en) * 2019-12-11 2024-06-04 深圳市诸脉科技有限公司 Pressure-adjustable oil cup fixing mechanism
CN112810306B (en) * 2021-01-05 2022-07-15 武延龙 But weaving stamp device of automatically regulated stamp position

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3737937A1 (en) * 1987-11-07 1989-05-18 Tampoprint Gmbh TAMPON PRINTING MACHINE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1247647A1 (en) 2001-04-04 2002-10-09 Teca-Print AG Ink cup for inking the printing plate in a pad printing machine

Also Published As

Publication number Publication date
WO1993011943A1 (en) 1993-06-24
DE59205914D1 (en) 1996-05-09
EP0571571A1 (en) 1993-12-01
AU2940192A (en) 1993-07-19
JP3219766B2 (en) 2001-10-15
CH688442A5 (en) 1997-09-30
JPH06508574A (en) 1994-09-29
ATE136257T1 (en) 1996-04-15

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