EP0420362A2 - Device for margin-perforated webs in printers, in particular matrix printers - Google Patents

Device for margin-perforated webs in printers, in particular matrix printers Download PDF

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Publication number
EP0420362A2
EP0420362A2 EP90250217A EP90250217A EP0420362A2 EP 0420362 A2 EP0420362 A2 EP 0420362A2 EP 90250217 A EP90250217 A EP 90250217A EP 90250217 A EP90250217 A EP 90250217A EP 0420362 A2 EP0420362 A2 EP 0420362A2
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EP
European Patent Office
Prior art keywords
drive belt
projections
pins
printers
pin
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.)
Ceased
Application number
EP90250217A
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German (de)
French (fr)
Other versions
EP0420362A3 (en
Inventor
Ulrich Dipl.-Ing. Buschmann
Günter Dipl.-Ing. Gomoll
Wolfgang Dipl.-Ing. Hauslaib
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.)
Vodafone GmbH
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Mannesmann AG
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Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0420362A2 publication Critical patent/EP0420362A2/en
Publication of EP0420362A3 publication Critical patent/EP0420362A3/en
Ceased legal-status Critical Current

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    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/26—Pin feeds
    • B41J11/30—Pin traction elements other than wheels, e.g. pins on endless bands

Definitions

  • the invention relates to a device for edge-punched paper webs in printers, in particular in matrix printers, in which the feed force can be transmitted by means of pins of a drive belt engaging in the edge holes, the flexible drive belt itself being provided with teeth on its underside lying on a driven wheel, which in grasp the corresponding tooth gaps of the driven wheel and the paper web resting on the upper side of the drive belt is stretched transversely to the axial direction of a pin base which increases in diameter and / or is pressed transversely to the axial direction by means of a pivotable tractor flap.
  • Such drive belts are used in so-called tractors which, when arranged in pairs in the perforated edge areas of so-called leporello paper, enable the paper web to be fed very precisely.
  • the pins of the drive belt must be precisely engaged in the edge perforation for accuracy.
  • the edge perforation only comes into effect when the pins with their largest diameter fill the holes in the paper.
  • differences in power transmission are still possible here. It has to be taken into account that the forces in the two edge strips of the leporello paper are transferred simultaneously and of the same size in order to avoid skewing of the paper web.
  • the power transmission depends on the overall friction ratio, since the paper with the holes has to be moved onto and out of the pins during the transport movement.
  • the present invention has for its object to further improve the frictional relationships between the drive belt and the perforated paper web in each case in the sense of not only leaving the power transmission to the pins, but generally increasing the driving force.
  • the object is achieved according to the invention in that on the upper side of the drive belt at least between two adjacent pins surface sections are each provided with projections which increase the friction. These projections increase the friction between the paper and the drive belt when the pins are swung in at a time when the paper has not yet fully reached the larger diameter pin base.
  • the driving force is increased significantly by a greater inaccuracy as a replacement for the projections. So the drive belts can be roughened on the designated surfaces (when manufactured by spraying), such as. B. be provided with incisions between which the "projections" arise.
  • knobs, cone tips, hemispheres or the like can be used to achieve the desired effect.
  • An improvement of the invention is that the projections are designed as burr-shaped projections extending transversely to the direction of movement. This solution defines the friction surfaces by the friction forces that occur again at equal intervals.
  • the increase in the frictional forces can also be achieved in that protrusions extending over the full belt width are formed between two successive pins and projections located at the level of a pin and interrupted by the pin.
  • the projections have a height of approximately 0.1 to 0.2 mm above the upper side of the drive belt.
  • drive belts, pins on the top, teeth on the bottom and the projections are injection-molded in one piece from a plasticizable, bendable plastic.
  • the device for perforated paper webs 1 is used as a driven wheel 2 in matrix printers, with two such wheels 2 being arranged in the edge regions of the paper web 1.
  • the device is equally suitable as a tractor with flaps which can be swung in over the paper web 1, in which the driven wheel 2 and an idling wheel (not shown) are spanned by a flexible drive belt 3, as is shown for the wheel 2 in FIG. 1.
  • the flexible drive belt 3 lies with its underside 4 on the wheel 2 and at the same time engages with teeth 5 in corresponding tooth gaps of the driven wheel 2.
  • the drive belt 3 is constructed on the basis of an effective diameter 9.
  • the direction of movement 10 of the paper web 1 and the drive belt 3 is also taken into account here, because a pin 7 only bears against the hole edge of the individual holes 11 in the paper web 1 in the direction of movement 10.
  • the difference in diameter between pin 7 and hole 11 is countered by the fact that (FIG. 2) each pin 7 has a pin base 12 which is larger in diameter and is formed by corresponding radii 13.
  • the pins 7 are provided with a radius 14 at the tip.
  • the teeth 5 are held at an angle 15 of approximately 40 degrees and are located e.g. B. exactly under a pin 7 ( Figure 2). Between two of the pins 7 there are surface sections 16 on which projections 17 are formed.
  • projections 17 on the upper side 6 of the drive belt 3 can, as drawn, be designed as projections 17a running transversely to the direction of movement 10.
  • the projections 17 are equipped as projections 17b (FIG. 2) extending over the full belt width 18 and at the level of a pin 7, projections 17c interrupted by the pin 7.
  • such a drive belt 3 has a thickness of approximately 0.3 mm and the projections 17, 17a, 17b, 17c rise approximately 0.1 to 0.2 mm above the upper side 6 of the drive belt.
  • the accuracy of the dimensions, the shapes and the tolerances is also increased in that the drive belt 3, the pins 7 on the upper side 6, the teeth 5 on the lower side 4 and the projections 17, 17a, 17b, 17c made of a plasticizable, bendable Plastic can be produced in one piece using the injection molding process.

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  • Advancing Webs (AREA)
  • Handling Of Sheets (AREA)

Abstract

Eine Vorrichtung für randgelochte Papierbahnen (1) weist Treibriemen (3) mit in die Löcher (11) eingreifenden Stiften (7) auf, die die Papierbahnen (1) transportieren. Um die Reibungskraft zwischen der Papierbahn (1) und den Treibriemen (3) jeweils zu erhöhen, wird vorgeschlagen, daß auf der Oberseite (6) des Treibriemens (3) zumindest zwischen jeweils zwei benachbarten Stiften (7) befindliche Flächenabschnitte (16) jeweils mit die Reibung erhöhenden Vorsprüngen (17; 17a; 17b; 17c) versehen sind.A device for perforated paper webs (1) has drive belts (3) with pins (7) which engage in the holes (11) and which transport the paper webs (1). In order to increase the frictional force between the paper web (1) and the drive belt (3), it is proposed that surface sections (16) located on the upper side (6) of the drive belt (3) at least between two adjacent pins (7) the projections (17; 17a; 17b; 17c) which increase the friction are provided.

Description

Die Erfindung betrifft eine Vorrichtung für randgelochte Papierbahnen in Druckern, insbesondere in Matrixdruckern, in denen die Vorschubkraft mittels in die Randlochung eingreifenden Stiften eines Treibriemens übertragbar ist, wobei der biegefähige Treibriemen selbst an seiner auf einem angetriebenen Rad liegenden Unterseite mit Zähnen versehen ist, die in entsprechende Zahnlücken des angetriebenen Rades greifen und wobei die auf der Oberseite des Treibriemens aufliegende Papierbahn quer zur Achsrichtung eines sich im Durchmesser vergrößernden Stiftfußes gespannt und/oder quer zur Achsrichtung mittels einer schwenkbaren Traktorklappe gepreßt wird.The invention relates to a device for edge-punched paper webs in printers, in particular in matrix printers, in which the feed force can be transmitted by means of pins of a drive belt engaging in the edge holes, the flexible drive belt itself being provided with teeth on its underside lying on a driven wheel, which in grasp the corresponding tooth gaps of the driven wheel and the paper web resting on the upper side of the drive belt is stretched transversely to the axial direction of a pin base which increases in diameter and / or is pressed transversely to the axial direction by means of a pivotable tractor flap.

Derartige Treibriemen werden in sogenannten Traktoren eingesetzt, die bei paarweiser Anordnung in den gelochten Randbereichen von sog. Leporello-Papier einen sehr genauen Vorschub der Papierbahn ermöglichen. Für die Genauigkeit ist allerdings ein exakter Eingriff der Stifte des Treibriemens in die Randlochung erforderlich. Die Randlochung kommt jedoch erst dann voll zur Wirkung, wenn die Stifte mit ihrem größten Durchmesser die Löcher im Papier ausfüllen. Trotzdem sind auch hier noch Unterschiede der Kraftübertragung möglich. Es muß nämlich bedacht werden, daß die Kräfte in den beiden Randstreifen des Leporello-Papiers gleichzeitig und gleichgroß übertragen werden, um einen Schieflauf der Papierbahn zu vermeiden. Außerdem hängt die Kraftübertragung von den Gesamtreibungsverhältnissen ab, da das Papier mit den Löchern während der Transportbewegung auf die Stifte und wieder aus diesen heraus bewegt werden muß.Such drive belts are used in so-called tractors which, when arranged in pairs in the perforated edge areas of so-called leporello paper, enable the paper web to be fed very precisely. However, the pins of the drive belt must be precisely engaged in the edge perforation for accuracy. However, the edge perforation only comes into effect when the pins with their largest diameter fill the holes in the paper. Nevertheless, differences in power transmission are still possible here. It has to be taken into account that the forces in the two edge strips of the leporello paper are transferred simultaneously and of the same size in order to avoid skewing of the paper web. In addition, the power transmission depends on the overall friction ratio, since the paper with the holes has to be moved onto and out of the pins during the transport movement.

Es sind die eingangs bezeichneten Treibriemen bekannt (DE-OS 36 14 891; US-PS 4,130,230), die an der Oberseite Stifte in bestimmten Abständen aufweisen und an der Unterseite die erwähnten Zähne, die für den Gleichlauf der beiden auf Papierbreite beabstandeten Traktoren sorgen.The drive belts described at the outset are known (DE-OS 36 14 891; US Pat. No. 4,130,230), which have pins at certain intervals on the top and the teeth mentioned on the underside, which ensure the synchronism of the two tractors spaced apart on paper width.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die Reibungsverhältnisse zwischen dem Treibriemen und der randgelochten Papierbahn jeweils weiter zu verbessern und zwar in dem Sinn, die Kraftübertragung nicht nur den Stiften zu überlassen, sondern die Mitnahmekraft generell zu erhöhen.The present invention has for its object to further improve the frictional relationships between the drive belt and the perforated paper web in each case in the sense of not only leaving the power transmission to the pins, but generally increasing the driving force.

Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß auf der Oberseite des Treibriemens zumindest zwischen jeweils zwei benachbarten Stiften befindliche Flächenabschnitte jeweils mit die Reibung erhöhenden Vorsprüngen versehen sind. Diese Vorsprünge erhöhen die Reibung zwischen Papier und dem Treibriemen beim Einschwenken der Stifte schon zu einem Zeitpunkt, wenn das Papier noch nicht voll den Stiftfuß mit dem größeren Durchmesser erreicht hat. Die Mitnahmekraft wird hierbei schon durch eine größere Ungenauigkeit als Ersatz für die Vorsprünge entscheidend erhöht. So können die Treibriemen an den bezeichneten Flächen (bei Herstellung durch Spritzen) aufgerauht, wie z. B. mit Einschnitten versehen sein, zwischen denen die "Vorsprünge" entstehen. Außerdem können Noppen, Kegelspitzen, Halbkugeln oder dergl. angewendet werden, um die gewünschte Wirkung zu erzielen.The object is achieved according to the invention in that on the upper side of the drive belt at least between two adjacent pins surface sections are each provided with projections which increase the friction. These projections increase the friction between the paper and the drive belt when the pins are swung in at a time when the paper has not yet fully reached the larger diameter pin base. The driving force is increased significantly by a greater inaccuracy as a replacement for the projections. So the drive belts can be roughened on the designated surfaces (when manufactured by spraying), such as. B. be provided with incisions between which the "projections" arise. In addition, knobs, cone tips, hemispheres or the like can be used to achieve the desired effect.

Eine Verbesserung der Erfindung besteht darin, daß die Vorsprünge als quer zur Bewegungsrichtung verlaufende, gratförmige Vorsprünge ausgebildet sind. Diese Lösung definiert die Reibungsflächen durch in gleichen Abständen wieder auftretende Reibkräfte.An improvement of the invention is that the projections are designed as burr-shaped projections extending transversely to the direction of movement. This solution defines the friction surfaces by the friction forces that occur again at equal intervals.

Die Erhöhung der Reibungskräfte kann noch dadurch erzielt werden, daß zwischen jeweils zwei in Bewegungsrichtung aufeinanderfolgenden Stiften auf voller Riemenbreite verlaufende Vorsprünge und auf Höhe eines Stiftes befindliche, durch den Stift unterbrochene Vorsprünge gebildet sind.The increase in the frictional forces can also be achieved in that protrusions extending over the full belt width are formed between two successive pins and projections located at the level of a pin and interrupted by the pin.

Die Verhältnisse liegen hierbei so, daß bei einer Dicke des Treibriemens von ca. 0,3 mm die Vorsprünge ca. 0,1 bis 0,2 mm Höhe über der Treibriemen-Oberseite aufweisen.The conditions here are such that with a thickness of the drive belt of approximately 0.3 mm, the projections have a height of approximately 0.1 to 0.2 mm above the upper side of the drive belt.

Vorteilhaft ist außerdem, daß Treibriemen, Stifte an der Oberseite, Zähne an der Unterseite und die Vorsprünge aus einem plastifizierbaren, biegefähigen Kunststoff einstückig gespritzt sind.It is also advantageous that drive belts, pins on the top, teeth on the bottom and the projections are injection-molded in one piece from a plasticizable, bendable plastic.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen:

  • Fig. 1 eine Seitenansicht des Treibriemens, der auf einem angetriebenen Rad liegt, im natürlichen Maßstab,
  • Fig. 2 eine Einzelheit Z wie in Figur 1 bezeichnet, etwa im Maßstab 10 : 1 und
  • Fig. 3 einen Querschnitt durch den Treibriemen gemäß Figur 2.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it:
  • 1 is a side view of the drive belt, which lies on a driven wheel, on a natural scale,
  • Fig. 2 shows a detail Z as in Figure 1, approximately on a scale of 10: 1
  • 3 shows a cross section through the drive belt according to FIG. 2.

Die Vorrichtung für randgelochte Papierbahnen 1 wird als angetriebenes Rad 2 in Matrixdruckern eingesetzt, wobei jeweils zwei solcher Räder 2 in den Randbereichen der Papierbahn 1 angeordnet sind. Die Vorrichtung ist gleichermaßen auch als Traktor mit über die Papierbahn 1 einschwenkbaren Klappen geeignet, bei dem das angetriebene Rad 2 und ein (nicht gezeigtes) leerlaufendes Rad von einem biegefähigen Treibriemen 3 umspannt wird, wie dies für das Rad 2 in Figur 1 gezeigt ist.The device for perforated paper webs 1 is used as a driven wheel 2 in matrix printers, with two such wheels 2 being arranged in the edge regions of the paper web 1. The device is equally suitable as a tractor with flaps which can be swung in over the paper web 1, in which the driven wheel 2 and an idling wheel (not shown) are spanned by a flexible drive belt 3, as is shown for the wheel 2 in FIG. 1.

Der biegefähige Treibriemen 3 liegt mit seiner Unterseite 4 auf dem Rad 2 und greift gleichzeitig mit Zähnen 5 in entsprechende Zahnlücken des angetriebenen Rades 2 ein. Auf der Oberseite 6 des Treibriemens 3 befinden sich Stifte 7, die in dem Lochabstand 8 der Papierbahn 1 aufeinanderfolgen, wobei die Stifte 7 entsprechend dem Lochabstand 8 in gestreckter Länge angeordnet sind. Der Treibriemen 3 ist diesbezüglich aufgrund eines Wirkdurchmessers 9 konstruiert. Hierbei wird auch die Bewegungsrichtung 10 der Papierbahn 1 und des Treibriemens 3 berücksichtigt, weil sich ein Stift 7 nur in Bewegungsrichtung 10 gegen den Lochrand der einzelnen Löcher 11 in der Papierbahn 1 anlegt. Dem Durchmesserunterschied zwischen Stift 7 und Loch 11 wird dadurch begegnet, daß (Figur 2) jeder Stift 7 einen im Durchmesser größeren Stiftfuß 12 aufweist, der durch entsprechende Radien 13 gebildet wird. Die Stifte 7 sind an der Spitze mit einem Radius 14 versehen.The flexible drive belt 3 lies with its underside 4 on the wheel 2 and at the same time engages with teeth 5 in corresponding tooth gaps of the driven wheel 2. On the upper side 6 of the drive belt 3 there are pins 7 which follow one another in the hole spacing 8 of the paper web 1, the pins 7 being arranged in an elongated length corresponding to the hole spacing 8. In this regard, the drive belt 3 is constructed on the basis of an effective diameter 9. The direction of movement 10 of the paper web 1 and the drive belt 3 is also taken into account here, because a pin 7 only bears against the hole edge of the individual holes 11 in the paper web 1 in the direction of movement 10. The difference in diameter between pin 7 and hole 11 is countered by the fact that (FIG. 2) each pin 7 has a pin base 12 which is larger in diameter and is formed by corresponding radii 13. The pins 7 are provided with a radius 14 at the tip.

Um eine genaue Teilung zu erzielen, sind die Zähne 5 unter einem Winkel 15 von ca. 40 Grad gehalten und befinden sich z. B. genau unter einem Stift 7 (Figur 2). Zwischen jeweils zwei der Stifte 7 entstehen Flächenabschnitte 16, auf denen Vorsprünge 17 gebildet sind.In order to achieve an exact division, the teeth 5 are held at an angle 15 of approximately 40 degrees and are located e.g. B. exactly under a pin 7 (Figure 2). Between two of the pins 7 there are surface sections 16 on which projections 17 are formed.

Diese Vorsprünge 17 auf der Oberseite 6 des Treibriemens 3 können wie gezeichnet als quer zur Bewegungsrichtung 10 verlaufende Vorsprünge 17a ausgebildet sein.These projections 17 on the upper side 6 of the drive belt 3 can, as drawn, be designed as projections 17a running transversely to the direction of movement 10.

Zwischen jeweils zwei in Bewegungsrichtung 10 aufeinanderfolgenden Stiften 7 sind die Vorsprünge 17 als auf voller Riemenbreite 18 verlaufende Vorsprünge 17b (Figur 2) und auf Höhe eines Stiftes 7 befindliche, durch den Stift 7 unterbrochene Vorsprünge 17c ausgestattet.Between two successive pins 7 in the direction of movement 10, the projections 17 are equipped as projections 17b (FIG. 2) extending over the full belt width 18 and at the level of a pin 7, projections 17c interrupted by the pin 7.

In der Praxis weist ein solcher Treibriemen 3 eine Dicke von ca. 0,3 mm auf und die Vorsprünge 17,17a,17b,17c erheben sich ca. 0,1 bis 0,2 mm über der Treibriemen-Oberseite 6.In practice, such a drive belt 3 has a thickness of approximately 0.3 mm and the projections 17, 17a, 17b, 17c rise approximately 0.1 to 0.2 mm above the upper side 6 of the drive belt.

Die Genauigkeit der Abmessungen, der Formen und der Toleranzen wird außerdem dadurch gesteigert, daß der Treibriemen 3, die Stifte 7 an der Oberseite 6, die Zähne 5 an der Unterseite 4 und die Vorsprünge 17,17a,17b,17c aus einem plastifizierbaren, biegefähigen Kunststoff einstückig im Spritzgießverfahren hergestellt werden.The accuracy of the dimensions, the shapes and the tolerances is also increased in that the drive belt 3, the pins 7 on the upper side 6, the teeth 5 on the lower side 4 and the projections 17, 17a, 17b, 17c made of a plasticizable, bendable Plastic can be produced in one piece using the injection molding process.

Claims (5)

1. Vorrichtung für randgelochte Papierbahnen in Druckern, insbesondere in Matrixdruckern, in denen die Vorschubkraft mittels in die Randlochung eingreifenden Stiften eines Treibriemens übertragbar ist, wobei der biegefähige Treibriemen selbst an seiner auf einem angetriebenen Rad liegenden Unterseite mit Zähnen versehen ist, die in entsprechende Zahnlücken des angetriebenen Rades greifen und wobei die auf der Oberseite des Treibriemens aufliegende Papierbahn quer zur Achsrichtung eines sich im Durchmesser vergrößernden Stiftfußes gespannt und/oder quer zur Achsrichtung mittels einer schwenkbaren Traktorklappe gepreßt wird,
dadurch gekennzeichnet,
daß auf der Oberseite (6) des Treibriemens (3) zumindest zwischen jeweils zwei benachbarten Stiften (7) befindliche Flächenabschnitte (16) jeweils mit die Reibung erhöhenden Vorsprüngen (17) versehen sind.1. Device for edge-punched paper webs in printers, in particular in matrix printers, in which the feed force can be transmitted by means of pins of a drive belt engaging in the edge holes, the flexible drive belt itself being provided with teeth on its underside lying on a driven wheel, which fit into corresponding tooth gaps grip the driven wheel and the paper web resting on the top of the drive belt is stretched transversely to the axial direction of a pin base which increases in diameter and / or is pressed transversely to the axial direction by means of a pivotable tractor flap,
characterized,
that on the upper side (6) of the drive belt (3) at least between two adjacent pins (7) located surface sections (16) are each provided with the friction-increasing projections (17). 2. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Vorsprünge (17) als quer zur Bewegungsrichtung (10) verlaufende, gratförmige Vorsprünge (17a) ausgebildet sind.2. Device according to claim 1,
characterized,
that the projections (17) are designed as burr-shaped projections (17a) running transversely to the direction of movement (10). 3. Vorrichtung nach den Ansprüchen 1 oder 2,
dadurch gekennzeichnet,
daß zwischen jeweils zwei in Bewegungsrichtung (10) aufeinanderfolgenden Stiften (7) auf voller Riemenbreite (18) verlaufende Vorsprünge (17b) und auf Höhe eines Stiftes (7) befindliche, durch den Stift (7) unterbrochene Vorsprünge (17c) gebildet sind.3. Device according to claims 1 or 2,
characterized,
that between two successive pins (7) running in the direction of movement (10) along the full belt width (18) are projections (17b) and are located at the level of a pin (7) and are interrupted by the pin (7) (17c). 4. Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß bei einer Dicke des Treibriemens (3) von ca. 0,3 mm die Vorsprünge (17) ca. 0,1 bis 0,2 mm Höhe über der Treibriemen-­Oberseite (6) aufweisen.4. The device according to one or more of claims 1 to 3,
characterized,
that with a thickness of the drive belt (3) of approximately 0.3 mm, the projections (17) have a height of approximately 0.1 to 0.2 mm above the upper side of the drive belt (6). 5. Vorrichtung nach den Ansprüchen 1 bis 4,
dadurch gekennzeichnet,
daß Treibriemen (3), Stifte (7) an der Oberseite (6), Zähne (5) an der Unterseite (4) und die Vorsprünge (17; 17b; 17c) aus einem plastifizierbaren, biegefähigen Kunststoff einstückig gespritzt sind.5. Device according to claims 1 to 4,
characterized,
that drive belt (3), pins (7) on the top (6), teeth (5) on the bottom (4) and the projections (17; 17b; 17c) are injection-molded in one piece from a plasticizable, bendable plastic.
EP19900250217 1989-09-29 1990-08-30 Device for margin-perforated webs in printers, in particular matrix printers Ceased EP0420362A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3933030A DE3933030A1 (en) 1989-09-29 1989-09-29 DEVICE FOR EDGE-HOLED PAPER SHEETS IN PRINTERS, ESPECIALLY IN MATRIX PRINTERS
DE3933030 1989-09-29

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Publication Number Publication Date
EP0420362A2 true EP0420362A2 (en) 1991-04-03
EP0420362A3 EP0420362A3 (en) 1991-07-31

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EP19900250217 Ceased EP0420362A3 (en) 1989-09-29 1990-08-30 Device for margin-perforated webs in printers, in particular matrix printers

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US (1) US5080272A (en)
EP (1) EP0420362A3 (en)
DE (1) DE3933030A1 (en)

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JPS61267621A (en) * 1985-05-21 1986-11-27 Konishiroku Photo Ind Co Ltd Both-sided copying apparatus
JPS62284761A (en) * 1986-06-03 1987-12-10 Seiko Epson Corp Printer

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN. vol. 27, no. 7b, Dezember 1984, NEW YORK US Seiten 4212 - 4213; REX: "forms feed tractor belt" *
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PATENT ABSTRACTS OF JAPAN vol. 12, no. 169 (M-699)(3016) 20 Mai 1988, & JP-A-62 284761 (OKAWA) 10 Dezember 1987, *

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EP0420362A3 (en) 1991-07-31
DE3933030C2 (en) 1992-04-30
US5080272A (en) 1992-01-14
DE3933030A1 (en) 1991-04-11

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