EP0512200A1 - Pumping arrangement for an ink storage tank of an inking unit in franking and stamping machines - Google Patents

Pumping arrangement for an ink storage tank of an inking unit in franking and stamping machines Download PDF

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Publication number
EP0512200A1
EP0512200A1 EP92102567A EP92102567A EP0512200A1 EP 0512200 A1 EP0512200 A1 EP 0512200A1 EP 92102567 A EP92102567 A EP 92102567A EP 92102567 A EP92102567 A EP 92102567A EP 0512200 A1 EP0512200 A1 EP 0512200A1
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EP
European Patent Office
Prior art keywords
ink
inking unit
threaded spindle
pump arrangement
franking
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.)
Granted
Application number
EP92102567A
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German (de)
French (fr)
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EP0512200B1 (en
Inventor
Lothar Klietz
Ernst Prohaska
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.)
Francotyp Postalia GmbH
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Francotyp Postalia GmbH
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 Francotyp Postalia GmbH filed Critical Francotyp Postalia GmbH
Publication of EP0512200A1 publication Critical patent/EP0512200A1/en
Application granted granted Critical
Publication of EP0512200B1 publication Critical patent/EP0512200B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41K—STAMPS; STAMPING OR NUMBERING APPARATUS OR DEVICES
    • B41K3/00—Apparatus for stamping articles having integral means for supporting the articles to be stamped
    • B41K3/54—Inking devices
    • B41K3/60—Inking devices using rollers, e.g. rollers with integral ink-supply devices
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00459—Details relating to mailpieces in a franking system
    • G07B17/00508—Printing or attaching on mailpieces
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00459—Details relating to mailpieces in a franking system
    • G07B17/00508—Printing or attaching on mailpieces
    • G07B2017/00516—Details of printing apparatus
    • G07B2017/00524—Printheads
    • G07B2017/00548—Mechanical printhead

Definitions

  • the invention relates to a pump arrangement according to the preamble of patent claim 1.
  • Pump-operated inking units are known from DE - 33 16 558 C2.
  • the stamping ink is constantly fed from a storage container via flexible hoses with the interposition of a pump system.
  • Peristaltic pumps and diaphragm pumps are used as the pump system.
  • imprecise routing of the hoses can lead to a malfunction and, after the machine has been idle for a long time and the paint has dried, bursting of the hose when it is started up again can lead to serious contamination of many machine parts.
  • the invention was based on the task of creating a pump arrangement for the ink supply to the inking unit for franking and stamping machines, which works reliably even with ink thickening and ink soiling and which can be used for high-performance franking machines.
  • threaded spindle can be operated as a vacuum or as a pressure pump. This enables variable adjustments to the consistency of the color as well as to constructive bonds.
  • the invention is explained in more detail below with the aid of a drawing.
  • the drawing shows the basic pump arrangement according to the invention, an embodiment with a suction threaded spindle being shown.
  • the Pumpenanordnuung consists of two paint containers 2, 5, one of which serves as an ink reservoir. Both paint containers 2, 5 are arranged one above the other, the upper paint container 5 also partially protruding into the lower paint container 2. When used in franking or stamping machines for a smaller number of frankings and thus lower ink requirements, the upper ink container 5 can be completely integrated in the lower ink container 2. Both paint containers 2, 5 are connected to each other by a guide tube 3. A threaded spindle 1 is mounted in the guide tube 3. The threaded spindle 1 is moved by an electric motor 7 as a pump unit via a coupling 6, for example formed from bevel and spur gears.
  • the coupling 6 can be structurally arranged inside or outside of the upper paint container.
  • the ink containers 2, 5 are connected to the inking unit 9 of the franking or stamping machine via separate pipe or hose connections 4, 8.
  • the ink is transported from the lower ink container 2 by means of the spindle into the upper container 5 by generating a negative pressure.
  • the paint is passed through the pipe or hose connection 8 into the inking unit 9 through its lower inlet connection.
  • the return flow of the paint that is not required via the higher outlet connection of the inking unit 9, the paint flows back through the hose connection 4 into the lower paint container 2.
  • an overpressure can also be generated by reversing the direction of rotation, which transports the paint from the upper paint container 5 into the lower paint container 2.
  • the inking unit 9 only the feed and discharge pipe or hose connections 8, 4 are to be exchanged.
  • an ink container 5 is placed in the other ink container 2. Furthermore, the complete drive, consisting of clutch 6 and electric motor 7, can be arranged within one paint container 5 for this purpose. The arrangement of the complete drive within the paint container 5 also avoids leaks.
  • the pump arrangement is controlled as a function of the franking or value stamp impressions, less wear and less heating of the ink can be achieved.

Abstract

A pumping arrangement, consisting of two ink containers (2, 5) placed one inside the other with a guide pipe (3) connecting them, is proposed for the ink supply tank of a franking or stamping machine. Serving as pump assembly is a threaded spindle (1) which is driven by an electric motor and is mounted in the guide pipe (3). <IMAGE>

Description

Die Erfindung betrifft eine Pumpenanordnung gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a pump arrangement according to the preamble of patent claim 1.

Pumpenbetriebene Farbwerke sind bekannt aus der DE - 33 16 558 C2. Darin wird über flexible Schläuche unter Zwischenschaltung eines Pumpensystems die Stempelfarbe ständig aus einem Vorratsbehälter zugeführt. Als Pumpensystem finden Schlauchpumpen und Membranpumpen Verwendung. Bei Schlauchpumpen kann eine unpräzise Führung der Schläuche zu einem Funktionsausfall führen und nach längerem Stillstand der Maschine und Eintrocknung der Farbe ein Platzen des Schlauches bei erneuter in Betriebnahme zu folgenreichen Verschmutzungen vieler Maschinenteile führen.Pump-operated inking units are known from DE - 33 16 558 C2. The stamping ink is constantly fed from a storage container via flexible hoses with the interposition of a pump system. Peristaltic pumps and diaphragm pumps are used as the pump system. In the case of peristaltic pumps, imprecise routing of the hoses can lead to a malfunction and, after the machine has been idle for a long time and the paint has dried, bursting of the hose when it is started up again can lead to serious contamination of many machine parts.

Die Verwendung von Membranpumpen erfordert eine aufwendige Sychronisierung der Zu- und Abförderpumpe. Außerdem kann auch durch Verschmutzung oder Farbverdickung ein Ausfall der Farbgebung eintreten. Die Vermutzungsgefahr ist auch bei der Verwendung von Ventilen gegeben, wie sie die EP - 0 376 477 A2 vorschlägt. Andere Farbwerke, die ohne ein Pumpensystem arbeiten, z.B. durch Übertragen der Farbe aus einem Vorratsbehälter mittels eines in die Farbe reichenden porösen Abstreifers, entsprechend der DE - 38 16 548 C2, weisen für Hochleistungsmaschinen, die bis zu 10.000 Frankierungen pro Stunde gestatten,eine zu geringe Kapazität auf.The use of diaphragm pumps requires complex synchronization of the feed and discharge pumps. In addition, the coloring can also fail due to soiling or paint thickening. The risk of contamination is also present when using valves, as proposed by EP - 0 376 477 A2. Other inking units that work without a pump system, e.g. by transferring the ink from a storage container by means of a porous scraper reaching into the ink, in accordance with DE-38 16 548 C2, has too little capacity for high-performance machines which allow up to 10,000 frankings per hour.

Der Erfidnung lag die Aufgabe zugrunde, für Frankier- und Wertstempelmaschinen eine Pumpenanordnung für die Farbzufuhr zum Farbwerk zu schaffen, die auch bei Farbverdickungen und Farbverschmutzungen funktionssicher arbeitet und die für Hochleistungs-Frankiermaschinen einsetzbar ist.The invention was based on the task of creating a pump arrangement for the ink supply to the inking unit for franking and stamping machines, which works reliably even with ink thickening and ink soiling and which can be used for high-performance franking machines.

Diese Aufgabe ist durch die Erfindung gelöst, wie sie im Kennzeichnungsteil des ersten Patentanspruches dargestellt ist.This object is achieved by the invention as shown in the characterizing part of the first claim.

Durch die elektrisch angestriebene Gewindespindel wird eine Verdickung in kürzester Zeit aufgelöst. Zudem wird durch diese Art des Pumpens eine relativ große Umwälzung des Farbvorrates erzielt, die für Hochleistungs-Frankiermaschinen erfoderlich ist.A thickening is quickly resolved by the electrically driven threaded spindle. In addition, this type of pumping achieves a relatively large circulation of the ink supply, which is necessary for high-performance franking machines.

Ein weiterer Vorteil ist, daß die Gewindespindel als Unterdruck- oder als Überdruckpumpe betrieben werden kann. Dadurch sind variable Angleichungen an die Konsistenz der Farbe wie auch an konstruktive Bindgungen ermöglicht.Another advantage is that the threaded spindle can be operated as a vacuum or as a pressure pump. This enables variable adjustments to the consistency of the color as well as to constructive bonds.

Andere vorteilhafte Maßnahmen zeigen die weiteren Unteransprüche.The other subclaims show other advantageous measures.

Anhand einer Zeichnung wird die Erfindung nachfolgend näher erläutert. Die Zeichnung zeigt die prinzipielle Pumpenanordnung nach der Erfindung, wobei eine Ausführung mit saugender Gewindespindel dargestellt ist.The invention is explained in more detail below with the aid of a drawing. The drawing shows the basic pump arrangement according to the invention, an embodiment with a suction threaded spindle being shown.

Die Pumpenanordnuung besteht aus zwei Farbbehältern 2, 5, von denen jeweils einer als Farbvorratsbehälter dient. Beide Farbbehälter 2, 5 sind übereinander angeordnet, wobei der obere Farbbehälter 5 auch teilweise in den unteren Farbbehälter 2 ragt. Bei Verwendung in Frankier- oder Wertstempelmaschinen für eine geringere Anzahl von Frankierungen und damit geringerem Farbbedarf kann der obere Farbbehälter 5 ganz im unteren Farbbehälter 2 integriert sein. Beide Farbbehälter 2, 5 sind durch ein Führungsrohr 3 miteinander verbunden. In dem Führungsrohr 3 ist eine Gewindespindel 1 gelagert. Die Gewindespindel 1 wird über eine Kupplung 6, z.B. aus Kegel- und Stirnrädern gebildet, von einem Elektromotor 7 als Pumpenaggregat bewegt.The Pumpenanordnuung consists of two paint containers 2, 5, one of which serves as an ink reservoir. Both paint containers 2, 5 are arranged one above the other, the upper paint container 5 also partially protruding into the lower paint container 2. When used in franking or stamping machines for a smaller number of frankings and thus lower ink requirements, the upper ink container 5 can be completely integrated in the lower ink container 2. Both paint containers 2, 5 are connected to each other by a guide tube 3. A threaded spindle 1 is mounted in the guide tube 3. The threaded spindle 1 is moved by an electric motor 7 as a pump unit via a coupling 6, for example formed from bevel and spur gears.

Die Kupplung 6 kann innerhalb oder außerhalb des oberen Farbbehälters konstruktiv angeordnet sein.The coupling 6 can be structurally arranged inside or outside of the upper paint container.

Die Farbbehälter 2, 5 sind über getrennte Rohr- oder Schlauchverbindungen 4, 8 mit dem Farbwerk 9 der Frankier- oder Wertstempelmaschine verbunden. Im gezeigten Beispiel mit einer saugenden Gewindespindel 1 wird aus dem unteren Farbbehälter 2 die Farbe mittels der Spindel in den oberen Behälter 5 durch Erzeugen eines Unterdruckes transportiert. Von dort wird die Farbe über die Rohr- oder Schlauchverbindung 8 in das Farbwerk 9 durch deren tiefer liegenden Zuflußstutzen geleitet. Der Rückfluß der nicht benötigten Farbe über den höher gelegenen Abflußstutzen des Farbwerkes 9 fließt die Farbe durch die Schlauchverbindung 4 zurück in den unteren Farbbehälter 2.The ink containers 2, 5 are connected to the inking unit 9 of the franking or stamping machine via separate pipe or hose connections 4, 8. In the example shown with a suction threaded spindle 1, the ink is transported from the lower ink container 2 by means of the spindle into the upper container 5 by generating a negative pressure. From there, the paint is passed through the pipe or hose connection 8 into the inking unit 9 through its lower inlet connection. The return flow of the paint that is not required via the higher outlet connection of the inking unit 9, the paint flows back through the hose connection 4 into the lower paint container 2.

Dieser ständige Umlauf in Verbindung mit der Gewindespindel 1 als Pumpenmittel verhindert ein Verdicken der Farbe. Bei einem nach längerer Standzeit wieder anlaufendem Farbwerk erhält die Farbe durch die Gewindespindel 1 in kürzester Zeit wieder ihre ursprüngliche Konsistenz.This constant circulation in connection with the threaded spindle 1 as a pump means prevents the paint from thickening. When the inking unit starts up again after a long period of inactivity, the color is restored to its original consistency in the shortest possible time by the threaded spindle 1.

Durch entsprechende Abdeckungen der Farbbehälter 2, 5 sowie des Farbwerkes 9 ist eine Verschmutzung der Farbe nur in geringem Umfang möglich, die zudem in Folge der Durchmischung bzw. Umwälzung der Farbe durch die Gewindespindel praktisch behoben wird.Corresponding covers for the ink tanks 2, 5 and the inking unit 9 allow the ink to be contaminated only to a small extent, which is also practically eliminated as a result of the mixing or circulation of the ink through the threaded spindle.

Anstelle der in der Zeichnung dargestellten saugenden Gewindespindel 1 ist auch durch Umkehr der Drehrichtung ein Überdruck erzeugbar, der die Farbe vom oberen Farbbehälter 5 in den unteren Farbbehälter 2 transportiert. An dem Farbwerk 9 sind lediglich die zu- und abführenden Rohr- oder Schlauchverbindungen 8, 4 zu vertauschen.Instead of the sucking threaded spindle 1 shown in the drawing, an overpressure can also be generated by reversing the direction of rotation, which transports the paint from the upper paint container 5 into the lower paint container 2. At the inking unit 9, only the feed and discharge pipe or hose connections 8, 4 are to be exchanged.

Zum Erzielen einer kompakten Bauform ist einerseits, wie bereits beschrieben, ein Farbbehälter 5 in den anderen Farbbehälter 2 gesetzt. Weiterhin kann zu diesem Zweck derkomplette Antrieb, bestehend aus Kupplung 6 und Elektromotor 7 innerhalb des einen Farbbehälters 5 angeordnet werden. Die Anordnung des kompletten Antriebs innerhalb des Farbbehälters 5 vermeidet außerdem Undichtigkeiten.To achieve a compact design, on the one hand, as already described, an ink container 5 is placed in the other ink container 2. Furthermore, the complete drive, consisting of clutch 6 and electric motor 7, can be arranged within one paint container 5 for this purpose. The arrangement of the complete drive within the paint container 5 also avoids leaks.

Bei einer flexiblen Ausbildung der Gewindespindel 1 ist diese in ein ebenfalls flexibles Führungsrohr 3 einsetzbar, wodurch eine weitere optimale Raumnutzung gegeben ist.In the case of a flexible design of the threaded spindle 1, it can be inserted into a likewise flexible guide tube 3, whereby a further optimal use of space is given.

Wird die Pumpenanordnung in Abhängigkeit der Frankier- oder Wertstempelabdrucke gesteuert, ist ein geringerer Verschleiß und eine geringere Erwärmung der Farbe erzielbar.If the pump arrangement is controlled as a function of the franking or value stamp impressions, less wear and less heating of the ink can be achieved.

Claims (6)

Pumpenanordnung für einen Farbvorratstank eines Farbwerkes in Frankier- und Wertstempelmaschinen, das aus einem Gehäuse mit Farbwalzen besteht, welches mit dem Farbvorratstank über Zulauf- und Rücklaufstutzen verbunden ist, dadurch gekennzeichnet, daß der Farbvorratstank aus zwei Farbbehältern (2, 5) besteht, die durch ein Führungsrohr (3) miteinander verbunden sind, daß in dem Führungsrohr (3) eine Gewindespindel (1) gelagert ist, die als Pumpenaggregat über eine Kupplung (6) von einem Elektromotor (7) angetrieben wird, und daß die Farbvorratsbehälter (2, 5) über Rohr- oder Schlauchverbindungen (4, 8) mit dem Farbwerk (9) verbunden sind.Pump arrangement for an ink supply tank of an inking unit in franking and stamping machines, which consists of a housing with inking rollers, which is connected to the ink supply tank via inlet and return ports, characterized in that the ink supply tank consists of two ink containers (2, 5), which by a guide tube (3) are connected to each other, that a threaded spindle (1) is mounted in the guide tube (3) and is driven by an electric motor (7) as a pump unit via a coupling (6), and that the ink reservoir (2, 5 ) are connected to the inking unit (9) via pipe or hose connections (4, 8). Pumpenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Gewindespindel (1) durch Erzeugen eines Unterdruckes Farbe aus dem ersten Farbbehälter (2) in den zweiten Farbbehälter (5) saugt und dem Farbwerk (9) zuführt.Pump arrangement according to claim 1, characterized in that the threaded spindle (1) sucks ink from the first ink container (2) into the second ink container (5) by generating a negative pressure and feeds it to the inking unit (9). Pumpenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Gewindespindel (1) durch Erzeugen eines Überdruckes Farbe aus dem zweiten Farbbehäler (5) in den ersten Farbbehälter (2) drückt und dem Farbwerk (9) zuführt.Pump arrangement according to claim 1, characterized in that the threaded spindle (1) presses ink from the second ink container (5) into the first ink container (2) by generating an overpressure and feeds it to the inking unit (9). Pumpenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Farbbehälter (2, 5) ineinander gesetzt sind.Pump arrangement according to claim 1, characterized in that the paint containers (2, 5) are set one inside the other. Pumpenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß der komplette Antrieb (6, 7) innerhalb des zweiten Farbbehälters (5) angeordnet ist.Pump arrangement according to claim 1, characterized in that the complete drive (6, 7) is arranged within the second paint container (5). Pumpenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß das Führungsrohr (3) und die Gewindespindel (1) flexibel gestaltet sind.Pump arrangement according to claim 1, characterized in that the guide tube (3) and the threaded spindle (1) are flexible.
EP92102567A 1991-05-04 1992-02-15 Pumping arrangement for an ink storage tank of an inking unit in franking and stamping machines Expired - Lifetime EP0512200B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4114963A DE4114963C2 (en) 1991-05-04 1991-05-04 Pump arrangement for an ink supply tank of an inking unit in franking and stamping machines
DE4114963 1991-05-04

Publications (2)

Publication Number Publication Date
EP0512200A1 true EP0512200A1 (en) 1992-11-11
EP0512200B1 EP0512200B1 (en) 1996-09-18

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EP92102567A Expired - Lifetime EP0512200B1 (en) 1991-05-04 1992-02-15 Pumping arrangement for an ink storage tank of an inking unit in franking and stamping machines

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US (1) US5193460A (en)
EP (1) EP0512200B1 (en)
CA (1) CA2067912C (en)
DE (2) DE4114963C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103253016A (en) * 2013-03-25 2013-08-21 中电长城(长沙)信息技术有限公司 Handy stamp-pad ink feeder of stamping machine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19706376C1 (en) * 1997-02-19 1998-03-12 Francotyp Postalia Gmbh Safety device for franking machine
DE10119678C1 (en) * 2001-04-20 2002-10-02 Tampoprint Gmbh Rotary printing machine has an engraved printing roller with vertical rotation axis, also having tampon rollers and a color applying system for coloring the printing roller
US20070086971A1 (en) * 2005-10-19 2007-04-19 Patrick Diet Acidic Cleaning Compositions
CN116873479A (en) * 2018-08-03 2023-10-13 浙江铜加工研究院有限公司 Character rolling device of circumscribed full-automatic character rolling machine

Citations (7)

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Publication number Priority date Publication date Assignee Title
US1997612A (en) * 1929-11-09 1935-04-16 Oxford Varnish Corp Vertical graining machine
GB565686A (en) * 1942-05-21 1944-11-22 Goss Printing Press Co Ltd Inking mechanism for rotary printing presses
GB626707A (en) * 1946-06-21 1949-07-20 Hoe & Co R Improvements in inking mechanism for printing machines
GB1509111A (en) * 1975-01-23 1978-04-26 Pitney Bowes Inc Apparatus for supplying fluent material
GB1532171A (en) * 1976-01-16 1978-11-15 Dodwell & Co Ltd Ink feeding apparatus for an offset printing press
US4164185A (en) * 1973-09-13 1979-08-14 Monarch Marking Systems, Inc. Inking mechanism
US4175489A (en) * 1978-05-31 1979-11-27 S. A. Martin Inking and washing circuit for a flexographic printing machine

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Publication number Priority date Publication date Assignee Title
US2573336A (en) * 1947-09-03 1951-10-30 Ibm Inking mechanism
US3540412A (en) * 1967-08-21 1970-11-17 Varian Associates Electrographic apparatus having an inking slot bearing against a web pulling roller
CH653158A5 (en) * 1981-09-21 1985-12-13 Hasler Ag Colour work for postage meter.
DE3316558A1 (en) * 1983-05-06 1984-11-08 Francotyp - Postalia GmbH, 1000 Berlin INKING MACHINE FOR STAMPING AND VALUE STAMPING MACHINES
JP2660720B2 (en) * 1988-05-20 1997-10-08 兵神装備株式会社 Vertical single shaft eccentric screw pump for powder transfer
CA2002618A1 (en) * 1988-12-28 1990-06-28 Danilo P. Buan Ink pump

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1997612A (en) * 1929-11-09 1935-04-16 Oxford Varnish Corp Vertical graining machine
GB565686A (en) * 1942-05-21 1944-11-22 Goss Printing Press Co Ltd Inking mechanism for rotary printing presses
GB626707A (en) * 1946-06-21 1949-07-20 Hoe & Co R Improvements in inking mechanism for printing machines
US4164185A (en) * 1973-09-13 1979-08-14 Monarch Marking Systems, Inc. Inking mechanism
GB1509111A (en) * 1975-01-23 1978-04-26 Pitney Bowes Inc Apparatus for supplying fluent material
GB1532171A (en) * 1976-01-16 1978-11-15 Dodwell & Co Ltd Ink feeding apparatus for an offset printing press
US4175489A (en) * 1978-05-31 1979-11-27 S. A. Martin Inking and washing circuit for a flexographic printing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103253016A (en) * 2013-03-25 2013-08-21 中电长城(长沙)信息技术有限公司 Handy stamp-pad ink feeder of stamping machine
CN103253016B (en) * 2013-03-25 2016-06-22 中电长城(长沙)信息技术有限公司 The convenient of seal-affixing machine adds stamp-pad ink device

Also Published As

Publication number Publication date
CA2067912C (en) 1997-12-30
DE59207152D1 (en) 1996-10-24
DE4114963C2 (en) 1995-04-20
EP0512200B1 (en) 1996-09-18
DE4114963A1 (en) 1992-11-05
CA2067912A1 (en) 1992-11-05
US5193460A (en) 1993-03-16

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