EP0002796B1 - Sheet or web feeding device for a printing apparatus - Google Patents

Sheet or web feeding device for a printing apparatus Download PDF

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Publication number
EP0002796B1
EP0002796B1 EP78101786A EP78101786A EP0002796B1 EP 0002796 B1 EP0002796 B1 EP 0002796B1 EP 78101786 A EP78101786 A EP 78101786A EP 78101786 A EP78101786 A EP 78101786A EP 0002796 B1 EP0002796 B1 EP 0002796B1
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EP
European Patent Office
Prior art keywords
ratchet wheel
pins
print roll
shaft
gear arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP78101786A
Other languages
German (de)
French (fr)
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EP0002796A1 (en
Inventor
Manfred Schmidt
Rainer Jürgen Kratzert
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International Business Machines Corp
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International Business Machines Corp
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Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0002796A1 publication Critical patent/EP0002796A1/en
Application granted granted Critical
Publication of EP0002796B1 publication Critical patent/EP0002796B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • 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
    • B41J11/24—Detents, brakes, or couplings for feed rollers or platens
    • 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
    • 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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/76—Line-spacing mechanisms
    • B41J19/78—Positive-feed mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/20—Advancing webs by web-penetrating means, e.g. pins

Definitions

  • the invention relates to a paper transport device for the transport of single and continuous forms in a writing device, in particular for transport in terminal printers, according to the preamble of claim 1.
  • a desktop computing device is known from German utility model 7 333 837, which contains a printing roller for transporting the paper to be printed, which serves on the one hand as a support for the printing unit and on the other hand as a friction drive.
  • this desktop computing device can be provided with a transport device having pins in the form of spiked rollers.
  • This spiked roller is by constant angular steps through one.
  • Stepper drive is drivable, which comprises a one-way stepping mechanism which is also actuated by the step-by-step lifting element which drives the platen roller.
  • This known transport device for forms in a desktop computing device either works only with the pressure roller as a friction drive or so that the spike roller is also driven by the drive for the pressure roller.
  • both parts are driven at the same time, there is always a puffing of the paper web between the two transport devices due to inaccuracies, particularly in the case of mechanical drives, so that a clean printed image cannot be achieved. So there are so-called imprecise line spacings.
  • due to the mechanical drive such an arrangement is not suitable for achieving the relatively high paper feed speeds required in terminal printers and the flexibility in the lengths of the paper feed.
  • US Pat. No. 3,880,016 describes a paper transport device according to the preamble of claim 1.
  • This paper transport device contains a feed roller, which is also used for support or feed purposes, and a transport device with pins for edge-punched forms.
  • a controllable stepper drive is provided for the application of the feed force.
  • a free-wheeling gear arrangement is provided on the shaft of the pressure roller and can be driven by a step-by-step mechanism which has a first and second clutch part which can be brought into engagement with it. If the gearwheel arrangement is engaged, then both the pressure roller and the transport device having pins are connected in terms of drive to the stepping drive.
  • the combination formed from the printing roller and pins can be moved or rotated together using a handwheel to align forms with the printing line.
  • a disadvantage of this known arrangement is that the pressure roller and the transport device having pins are always coupled to one another and are advanced either by hand or via the stepping drive. They are structurally related to one another and are therefore not intended and suitable for an independent advance of the forms by the transport device having the pins or the pressure roller or a decoupling of these two parts.
  • the object of the present invention is therefore to provide, in a paper transport device of the type according to the preamble of claim 1, the possibility that such a paper transport device can be easily adapted to various tasks, is simple in design, works safely and reliably and is simple to use is to be handled.
  • the invention advantageously makes it possible to design a simple paper transport device in such a way that it is very flexible in its use, so that both individual and continuous forms can be fed securely, these can be easily inserted and are fed in such a way that even at relatively high feed speeds an attractive and reliable print image with constant line spacing can certainly be achieved. Further advantages result from the description of the exemplary embodiment.
  • FIG. 1 contains the parts essential for the inventive function. Share the z. B. serve the storage, are not shown for better clarity, but they are clearly obvious to a specialist.
  • the shaft 3 is rotatably supported in bearings, not shown.
  • the paper web 2 can be wrapped around the printing roller 1 at an angle of more than 90 ° and is then, as in the exemplary embodiment shown in FIG. 1, an endless form with a perforated edge tion holes is guided by a transport device formed from two tractors 4 and 5, pins.
  • the tractors 4 and 5 each consist essentially of a belt 8 and 9, which is provided with teeth on the inside, and each is guided around two toothed wheels 11 and 12 or 13 and 14.
  • the belts 8 and 9 have pins 15 on the outside, which engage in the perforated edges of the paper web 2 at a corresponding distance and thus advance them when driven.
  • the tractors can also be provided with hinged covers 16, by means of which the paper web is held on the pins 15 or the belts 8 and 9.
  • a drive gear 17 is arranged, which is driven by an intermediate wheel 18 in the direction T, the transport direction of the paper web 2.
  • the intermediate gear 18 meshes with a gear 19 of a gear arrangement which is arranged freely on the shaft 3 of the printing roller 1.
  • the gear 19 running freely on the shaft 3 can be driven directly by a stepper motor 20 with a drive gear 21, or, as shown in the illustration in FIG. 1, via a further gear 22 which is in engagement with the drive gear 21 of the stepper motor 20.
  • the two gears 19 and 22 are then rigidly connected to one another via a sleeve 23.
  • the gear wheel 22 has a first coupling part 24, which is provided with slots 25, into which lugs 27 attached there can engage in order to connect the two coupling parts to one another in a rotationally fixed manner.
  • the second clutch part 26 is attached to a toothed ratchet wheel 28 on the side of the first clutch part 24 of the gear wheel 22.
  • the ratchet wheel 28 is rotatably connected to a handwheel 30 via a sleeve 29.
  • the ratchet wheel 28 together with the sleeve 29 and the handwheel 30 are arranged on the shaft 3 of the roller 1 so as to be displaceable in the axial direction. For this displacement in the axial direction, an elongated hole 31 is provided in the sleeve 29 on both sides.
  • a pin 32 is arranged, past which the sleeve 29 together with the handwheel 30 and the ratchet wheel 28 can be moved in the axial direction on the shaft 3 of the pressure roller 1, limited by the length of the elongated hole 31.
  • the ratchet wheel 28 In the position shown in FIG. 1, in which the ratchet wheel 28 together with the handwheel 30 is located on the right at the extreme end of the shaft 3, the ratchet wheel 28 is locked in rotation by a catch 33.
  • the two coupling parts 24 and 26 are not in engagement with each other.
  • Fig. 2 shows a side view of a sectional view along the plane 2-2 of Fig. 1. It can be clearly seen how the paper web 2 is guided at a wrap angle of more than 90 ° around the pressure roller 1 and of the transport device having pins, such as For example, the tractor 5 can be advanced in the direction of arrow T.
  • the printing roller 1 serves as a support for a printing device 34, which can be designed, for example, as a wire pen printer.
  • the paper lies well in the printing position in the printing device 34 on the printing roller 1, so that a clean print image is ensured from the paper guide.
  • paper brakes 35 formed from leaf springs are provided which, in an arc, bear against the printing roller 1 and thus press the paper web 2 against the printing roller 1.
  • paper pressure rollers 36 are provided, which can be placed on arms 37 in the direction of arrow 38 by an actuating device (not shown in more detail) on the printing roller 1 or can be held raised by the latter. For example, when the paper is fed through the tractors 4 and 5, it is convenient to keep the paper pinch rollers 36 in the lifted condition shown in FIG. Otherwise the braking effect would be too great.
  • the transport device comprising pins formed from the two tractors 4 and 5 and the gears 17 and 18 is expediently designed as an associated assembly and can be inserted and locked in a simple manner in the frame (not shown in the figures).
  • the drive coupling when such a pin having a transport device is attached to the intended roller drive then takes place via the gear arrangement, which in the exemplary embodiment consists of the gears 19 and 22, connected via a fixed sleeve 23.
  • a single gearwheel can also be provided for this, if the transmission ratios and the space conditions permit or necessitate this.
  • the paper transport device designed according to the invention serves various purposes. Let us first consider the case where an endless form web with perforations in the edge is to be inserted into the transport device shown in the figures. For this purpose, the handwheel 30 with the ratchet wheel 28 is shifted to the left by the operator into a position in which this is released by the detent 33, but not so far that the two coupling parts 24 and 26 are in engagement with one another.
  • the handwheel 30 Due to the non-rotatable connection via the slot 31 and the pin 32, the handwheel 30 is connected to the shaft 3 in a rotationally fixed manner. As a result, the pressure roller 1 is rotated when the handwheel 30 is rotated, without the need for the non-coupled gear connection 21, 23, 22 and the intermediate wheel 18 and the drive gear 17, the two tractors 4 and 5 are rotated. This is because the gear connection, consisting of the two gear wheels 19 and 22, is arranged freely on the shaft 3. Thus, in this intermediate position of the ratchet wheel 28, there is the possibility of enabling the pressure roller 1 via the handwheel 30 to thread the paper web, which is fed from behind, without the transport device having the pins being rotated at the same time.
  • the paper pressure rollers 36 are expediently lifted off the printing roller 1 in this operation. This makes it easy to insert and insert paper by hand. If you have fed enough paper over the pressure roller 1 serving as a friction drive, the edge-perforated paper web 2 can be inserted into the pins 15 in the correct position with the lid 16 open.
  • the handwheel 30 with the ratchet wheel 28 is moved so far in the axial direction to the left (see FIG. 1) that the lugs 27 of the second coupling part 26 engage in the slots 25 of the first coupling part 24 and thus a connection between the gear 22 and via the connection consisting of slot 31 and pin 32 are connected in a rotationally fixed manner to the shaft 3 and thus to the pressure roller 1.
  • both the pressure roller 1 and the tractors 4 and 5 can still be rotated together by hand using the handwheel 30.
  • the pressure roller 1 as a paper brake if the paper web 2 provided with perforations at the edge is advanced by the two tractors 4 and 5 alone.
  • the handwheel 30 is brought with the locking wheel 28 into the position shown in FIG. 1, in which the shaft 3 and thus the pressure roller 1 are locked and stand still due to the engagement of the detent 33 in a tooth gap of the locking wheel 28.
  • the stepper motor 20 can drive the two tractors 4 and 5 via its drive gear 21 and the gear arrangement 19, 22 that freewheels on the shaft 3, the idler gear 18 and the drive gear 17 via the square drive shaft 6.
  • the stepper motor 20 is driven via its drive gear 21 in such a way that the gear 22 1, or in the intermediate position, transmits the driving force via the elongated hole 31 and the pin 32 to the shaft 3 of the pressure roller 1 via the coupled coupling parts 24 and 26, when the handwheel 30 is in the position on the left in FIG. 1, or in the intermediate position.
  • the paper pressure rollers 36 are expediently in contact with the printing roller 1. It thus serves as a pure friction drive on the one hand and on the other hand as a support for the printing device 34.
  • the transport device shown in the figures has two tractors 4 and 5. Instead of these tractors, a so-called spiked roller transport device can also be used, which contains rolls of relatively large diameters with perforations on the edges for guiding perforated paper webs. Furthermore, the gear arrangement consisting of the two gear wheels 19 and 22 can be replaced by a single gear wheel running freely on the shaft 3, which meshes with the drive pinion 21 of the stepping motor 20 and is driven thereby.
  • the stepping motor 20 is used in a known manner to gradually feed the paper web in the desired manner during printing.
  • the paper transport device designed according to the invention can be used in various ways in devices which write data or recordings, as was described above.
  • a particularly suitable field of application are the so-called terminal printers, which, due to the flexibility of the transport device according to the invention, can be used for various purposes, such as for example the continuous form feed with perforated webs or the single sheet feeding and feeding with the printing roller solely as a friction drive.
  • the paper transport device designed according to the invention is very flexible in its possible uses, comfortable and easy to use for the operator and structurally simple and functional.

Landscapes

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

Description

Die Erfindung betrifft eine Papiertransportvorrichtung für den Transport von Einzel- als auch Endlosformularen in einem schreibenden Gerät, insbesondere für den Transport in Terminaldrukkern, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a paper transport device for the transport of single and continuous forms in a writing device, in particular for transport in terminal printers, according to the preamble of claim 1.

Aus dem deutschen Gebrauchsmuster 7 333 837 ist ein Tischrechengerät bekannt, das zum Transport des zu bedruckenden Papiers eine Druckwalze enthält, die zum einen als Auflage für das Druckwerk dient und zum anderen als Friktionstrieb. Um Papierbahnen mit Randlochungen transportieren zu können, ist dieses Tischrechengerät mit einer Stifte aufweisenden Transportvorrichtung in Gestalt von Stachelwalzen versehbar. Diese Stachelwalze ist um gleichbleibende Winkelschritte durch einen . Schrittantrieb antreibbar, der ein Einrichtungs-Schrittschaltwerk umfaßt, das von dem die Schreibwalze antreibenden schrittweise arbeitenden Hubglied mitbetätigt wird. Diese bekannte Transportvorrichtung für Formulare in einem Tischrechengerät arbeitet entweder nur allein mit der Druckwalze als Friktionstrieb oder so, daß gleichzeitig durch den Antrieb für die Druckwalze auch die Stachelwalze angetrieben wird. Werden jedoch beide Teile gleichzeitig angetrieben, so ist durch vor allem bei mechanischen Antrieben vorhandene Ungenauigkeiten immer ein Aufbauschen der Papierbahn zwischen den beiden Transportvorrichtungen vorhanden, so daß kein sauberes Druckbild erzielbar ist. Es gibt also sogenannte ungenaue Zeilenabstände. Darüber hinaus ist aufgrund des mechanischen Antriebes eine solche Anordnung nicht geeignet, die auch in Terminaldruckern notwendigen, relativ hohen Papiervorschubgeschwindigkeiten und die Flexibilität in den Längen des Papiervorschubes zu erzielen.A desktop computing device is known from German utility model 7 333 837, which contains a printing roller for transporting the paper to be printed, which serves on the one hand as a support for the printing unit and on the other hand as a friction drive. In order to be able to transport paper webs with perforations at the edge, this desktop computing device can be provided with a transport device having pins in the form of spiked rollers. This spiked roller is by constant angular steps through one. Stepper drive is drivable, which comprises a one-way stepping mechanism which is also actuated by the step-by-step lifting element which drives the platen roller. This known transport device for forms in a desktop computing device either works only with the pressure roller as a friction drive or so that the spike roller is also driven by the drive for the pressure roller. However, if both parts are driven at the same time, there is always a puffing of the paper web between the two transport devices due to inaccuracies, particularly in the case of mechanical drives, so that a clean printed image cannot be achieved. So there are so-called imprecise line spacings. In addition, due to the mechanical drive, such an arrangement is not suitable for achieving the relatively high paper feed speeds required in terminal printers and the flexibility in the lengths of the paper feed.

In der US-PS 3 880 016 ist eine Papiertransportvorrichtung gemäß dem Oberbegriff des Anspruchs 1 beschrieben. Diese Papiertransportvorrichtung enthält eine Vorschubwalze, die auch Auflage- bzw. Vorschubzwecken dient, und eine Stifte aufweisende Transportvorrichtung für randgelochte Formulare. Für die Aufbringung der Vorschubkraft ist ein steuerbarer Schrittantrieb vorgesehen. Auf der Welle der Druckwalze ist eine freilaufende Zahnradanordnung vorgesehen, die von einem Schrittschaltwerk antreibbar ist, welches einen ersten und mit diesem in Eingriff bringbaren zweiten Kupplungsteil aufweist. Ist die Zahnradanordnung eingekuppelt, dann sind sowohl die Druckwalze als auch die Stifte aufweisende Transportvorrichtung antriebsmäßig mit dem Schrittantrieb verbunden. In ausgekuppeltem Zustand kann über ein Handrad zur Ausrichtung von Formularen mit der Druckzeile die aus Druckwalze und Stifte aufweisende Transportvorrichtung gebildete Kombination zusammen verschoben bzw. verdreht werden. Nachteilig bei dieser bekannten Anordnung ist es, daß die Druckwalze und die Stifte aufweisende Transportvorrichtung immer miteinander gekuppelt sind, und entweder von Hand oder über den Schrittantrieb vorgeschoben werden. Sie hängen konstruktiv miteinander zusammen und sind daher für einen unabhängigen Vorschub der Formulare durch die Stifte aufweisende Transportvorrichtung bzw. die Druckwalze oder eine Entkupplung dieser beiden Teile nicht vorgesehen und geeignet.US Pat. No. 3,880,016 describes a paper transport device according to the preamble of claim 1. This paper transport device contains a feed roller, which is also used for support or feed purposes, and a transport device with pins for edge-punched forms. A controllable stepper drive is provided for the application of the feed force. A free-wheeling gear arrangement is provided on the shaft of the pressure roller and can be driven by a step-by-step mechanism which has a first and second clutch part which can be brought into engagement with it. If the gearwheel arrangement is engaged, then both the pressure roller and the transport device having pins are connected in terms of drive to the stepping drive. In the uncoupled state, the combination formed from the printing roller and pins can be moved or rotated together using a handwheel to align forms with the printing line. A disadvantage of this known arrangement is that the pressure roller and the transport device having pins are always coupled to one another and are advanced either by hand or via the stepping drive. They are structurally related to one another and are therefore not intended and suitable for an independent advance of the forms by the transport device having the pins or the pressure roller or a decoupling of these two parts.

Aufgabe vorliegender Erfindung ist es daher, bei einer Papiertransportvorrichtung der Art gemäß dem Oberbegriff des Anspruchs 1 die Möglichkeit zu schaffen, daß eine solche Papiertransportvorrichtung an verschiedene Aufgaben leicht anpaßbar ist, einfach in ihrem Aufbau gestaltet ist, sicher und zuverlässig arbeitet sowie für die Bedienung einfach zu handhaben ist.The object of the present invention is therefore to provide, in a paper transport device of the type according to the preamble of claim 1, the possibility that such a paper transport device can be easily adapted to various tasks, is simple in design, works safely and reliably and is simple to use is to be handled.

Diese Aufgabe wird erfindungsgemäß durch Anwendung der im kennzeichnenden Teil des Anspruchs 1 niedergelegten Merkmale prinzipiell und grundsätzlich gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen dieser prinzipiellen Lösung sind in den Unteransprüchen niedergelegt.This object is achieved in principle and in principle by applying the features set out in the characterizing part of claim 1. Advantageous refinements and developments of this basic solution are laid down in the subclaims.

Durch die Erfindung wird es in vorteilhafter Weise ermöglicht, eine einfache Papiertransportvorrichtung so auszugestalten, daß sie in ihrer Anwendung sehr flexibel ist, um sowohl Einzel- als auch Endlosformulare sicher vorzuschieben, diese einfach einzulegen sind und so vorgeschoben werden, daß auch bei relativ hohen Vorschubgeschwindigkeiten mit Sicherheit ein ansprechendes und zuverlässiges Druckbild bei gleichbleibendem Zeilenabstand erzielbar ist. Weitere Vorteile ergeben sich aufgrund der Beschreibung des Ausführungsbeispieles.The invention advantageously makes it possible to design a simple paper transport device in such a way that it is very flexible in its use, so that both individual and continuous forms can be fed securely, these can be easily inserted and are fed in such a way that even at relatively high feed speeds an attractive and reliable print image with constant line spacing can certainly be achieved. Further advantages result from the description of the exemplary embodiment.

Aufbau und Wirkungsweise der erfindungsgemäß gestalteten Papiertransportvorrichtung ist nachfolgend anhand des in den Figuren dargestellten Ausführungsbeispieles näher erläutert.The structure and mode of operation of the paper transport device designed according to the invention is explained in more detail below with reference to the exemplary embodiment shown in the figures.

Die Figuren zeigen im einzelnen:

  • Fig. 1 perspektivisch die wesentlichen Teile der erfindungsgemäß gestalteten Papiertransportvorrichtung und
  • Fig. 2 ein Schnitt entlang der Ebene 2-2 gemäß Fig.1.
The figures show in detail:
  • Fig. 1 in perspective the essential parts of the paper transport device designed according to the invention and
  • 2 shows a section along the plane 2-2 according to FIG. 1.

Die in Fig. 1 perspektivisch gezeigte Darstellung enthält die für Erfindungsfunktion wesentlichen Teile. Teile die z. B. der Lagerung dienen, sind der besseren Übersichtlichkeit wegen nicht dargestellt, sie sind für einen Fachmann jedoch klar auf der Hand liegend. Eine Druckwalze 1, die sowohl als Auflage in der Druckposition für eine Papierbahn 2 als auch Vorschubzwecken dient, ist auf einer Welle 3 fest angeordnet. Die Welle 3 ist in nicht dargestellten Lagern drehbar gelagert. Die Papierbahn 2 kann um einen Winkel von mehr als 90° um die Druckwalze 1 herumgeschlungen sein und ist dann, wenn es sich, wie in dem dargestellten Ausführungsbeispiel der Fig. 1, um ein Endlosformular mit Randperforationslöchern handelt, von einer aus zwei Traktoren 4 und 5 gebildeten, Stifte aufweisenden Transportvorrichtung geführt. Diese Traktoren sind auf zwei Wellen 6 und 7 geführt, wovon die Vierkantwelle 6 als Antriebswelle dient, und seitlich verschiebbar auf diesen Wellen angeordnet, um sie an verschieden breite Papierbahnen 2 anpassen zu können. Die Traktoren 4 und 5 bestehen jeweils im wesentlichen aus einem auf der Innenseite mit Zähnen versehenen Riemen 8 bzw. 9, der je um zwei Zahnräder 11 und 12 bzw. 13 und 14 geführt ist. Die Riemen 8 und 9 weisen auf der Außenseite Stifte 15 auf, die entsprechend beabstandet in die Randperforationslöcher der Papierbahn 2 eingreifen und sie somit bei Antrieb vorschieben. Die Traktoren können noch mit abklappbaren Deckeln 16 versehen sein, durch welche die Papierbahn auf den Stiften 15 bzw. den Riemen 8 und 9 gehalten wird. Auf der antreibenden Vierkantwelle 6 der beiden Traktoren 4 und 5 ist ein Antriebszahnrad 17 angeordnet, das von einem Zwischenrad 18 in Richtung T, der Transportrichtung der Papierbahn 2, angetrieben wird. Das Zwischenrad 18 kämmt mit einem Zahnrad 19 einer Zahnradanordnung, die freilaufend auf der Welle 3 der Druckwalze 1 angeordnet ist. Das auf der Welle 3 freilaufende Zahnrad 19 kann direkt von einem Schrittschaltmotor 20 mit einem Antriebszahnrad 21 angetrieben werden, oder wie in der Darstellung der Fig. 1 gezeigt, über ein weiteres Zahnrad 22, das mit dem Antriebszahnrad 21 des Schrittschaltmotors 20 in Eingriff steht. Dabei sind-dann die beiden Zahnräder 19 und 22 über eine Hülse 23 starr miteinander verbunden. Das Zahnrad 22 weist einen ersten Kupplungsteil 24 auf, der mit Schlitzen 25 versehen ist, in die von einem zweiten Kupplungsteil 26 dort angebrachte Nasen 27 eingreifen können, um beide Kupplungsteile drehfest miteinander zu verbinden.The representation shown in perspective in FIG. 1 contains the parts essential for the inventive function. Share the z. B. serve the storage, are not shown for better clarity, but they are clearly obvious to a specialist. A printing roller 1, which serves both as a support in the printing position for a paper web 2 and for feeding purposes, is fixedly arranged on a shaft 3. The shaft 3 is rotatably supported in bearings, not shown. The paper web 2 can be wrapped around the printing roller 1 at an angle of more than 90 ° and is then, as in the exemplary embodiment shown in FIG. 1, an endless form with a perforated edge tion holes is guided by a transport device formed from two tractors 4 and 5, pins. These tractors are guided on two shafts 6 and 7, of which the square shaft 6 serves as the drive shaft, and are arranged laterally displaceably on these shafts in order to be able to adapt them to paper webs 2 of different widths. The tractors 4 and 5 each consist essentially of a belt 8 and 9, which is provided with teeth on the inside, and each is guided around two toothed wheels 11 and 12 or 13 and 14. The belts 8 and 9 have pins 15 on the outside, which engage in the perforated edges of the paper web 2 at a corresponding distance and thus advance them when driven. The tractors can also be provided with hinged covers 16, by means of which the paper web is held on the pins 15 or the belts 8 and 9. On the driving square shaft 6 of the two tractors 4 and 5, a drive gear 17 is arranged, which is driven by an intermediate wheel 18 in the direction T, the transport direction of the paper web 2. The intermediate gear 18 meshes with a gear 19 of a gear arrangement which is arranged freely on the shaft 3 of the printing roller 1. The gear 19 running freely on the shaft 3 can be driven directly by a stepper motor 20 with a drive gear 21, or, as shown in the illustration in FIG. 1, via a further gear 22 which is in engagement with the drive gear 21 of the stepper motor 20. The two gears 19 and 22 are then rigidly connected to one another via a sleeve 23. The gear wheel 22 has a first coupling part 24, which is provided with slots 25, into which lugs 27 attached there can engage in order to connect the two coupling parts to one another in a rotationally fixed manner.

Der zweite Kupplungsteil 26 ist an einem gezahnten Rastrad 28 auf der Seite des ersten Kupplungsteils 24 des Zahnrads 22 angebracht. Das Rastrad 28 ist über eine Hülse 29 mit einem Handrad 30 drehfest verbunden. Das Rastrad 28 zusammen mit der Hülse 29 und dem Handrad 30 sind auf der Welle 3 der Walze 1 in axialer Richtung verschiebbar angeordnet. Zu dieser Verschiebung in axialer Richtung ist in der Hülse 29 beidseitig ein Langloch 31 vorgesehen. Auf der Welle 3 ist ein Stift 32 angeordnet, an dem vorbei die Hülse 29 zusammen mit dem Handrad 30 und dem Rastrad 28 in axialer Richtung auf der Welle 3 der Druckwalze 1 begrenzt durch die Länge des Langlochs 31, verschoben werden kann. In der Fig. 1 dargestellten Position, bei der das Rastrad 28 zusammen mit dem Handrad 30 sich rechts am äußersten Ende der Welle 3 befindet, ist das Rastrad 28 drehfest durch eine Raste 33 verrastet. Dabei sind die beiden Kupplungsteile 24 und 26 nicht miteinander im Eingriff.The second clutch part 26 is attached to a toothed ratchet wheel 28 on the side of the first clutch part 24 of the gear wheel 22. The ratchet wheel 28 is rotatably connected to a handwheel 30 via a sleeve 29. The ratchet wheel 28 together with the sleeve 29 and the handwheel 30 are arranged on the shaft 3 of the roller 1 so as to be displaceable in the axial direction. For this displacement in the axial direction, an elongated hole 31 is provided in the sleeve 29 on both sides. On the shaft 3, a pin 32 is arranged, past which the sleeve 29 together with the handwheel 30 and the ratchet wheel 28 can be moved in the axial direction on the shaft 3 of the pressure roller 1, limited by the length of the elongated hole 31. In the position shown in FIG. 1, in which the ratchet wheel 28 together with the handwheel 30 is located on the right at the extreme end of the shaft 3, the ratchet wheel 28 is locked in rotation by a catch 33. The two coupling parts 24 and 26 are not in engagement with each other.

Fig. 2 zeigt in Seitenansicht ein Schnittbild entlang der Ebene 2-2 aus Fig. 1. Dabei ist gut ersichtlich, wie die Papierbahn 2 in einem Umschlingungswinkel von mehr als 90° um die Druckwalze 1 herumgeführt ist und von der Stifte aufweisenden Transportvorrichtung, wie beispielsweise dem Traktor 5, in Richtung des Pfeiles T vorgeschoben werden kann. Die Druckwalze 1 dient als Auflage für eine Druckvorrichtung 34, die beispielsweise als Drahtstiftdrucker ausgebildet sein kann. Das Papier liegt dabei in der Druckposition bei der Druckvorrichtung 34 gut auf der Druckwalze 1 auf, so daß ein sauberes Druckbild von der Papierführung her gewährleistet ist.Fig. 2 shows a side view of a sectional view along the plane 2-2 of Fig. 1. It can be clearly seen how the paper web 2 is guided at a wrap angle of more than 90 ° around the pressure roller 1 and of the transport device having pins, such as For example, the tractor 5 can be advanced in the direction of arrow T. The printing roller 1 serves as a support for a printing device 34, which can be designed, for example, as a wire pen printer. The paper lies well in the printing position in the printing device 34 on the printing roller 1, so that a clean print image is ensured from the paper guide.

Um die Papierführung noch zu verbessern, sind aus Blattfedern gebildete Papierbremsen 35 vorgesehen, die in einem Bogen geführt an der Druckwalze 1 anliegen und somit die Paierbahn 2 an die Druckwalze 1 andrücken. Des weiteren sind Papierandrückrollen 36 vorgesehen, die auf Armen 37 in Richtung des Pfeiles 38 durch eine nicht näher dargestellte Betätigungsvorrichtung an die Druckwalze 1 angelegt werden oder von dieser abgehoben gehalten werden können. Wenn beispielsweise das Papier durch die Traktoren 4 und 5 vorgeschoben wird, ist es zweckmäßig, die Papierandrückrollen 36 in dem in Fig. 2 dargestellten Zustand des Abgehobenseins zu halten. Sonst würde ggf. die Bremswirkung zu groß werden.In order to further improve the paper guidance, paper brakes 35 formed from leaf springs are provided which, in an arc, bear against the printing roller 1 and thus press the paper web 2 against the printing roller 1. In addition, paper pressure rollers 36 are provided, which can be placed on arms 37 in the direction of arrow 38 by an actuating device (not shown in more detail) on the printing roller 1 or can be held raised by the latter. For example, when the paper is fed through the tractors 4 and 5, it is convenient to keep the paper pinch rollers 36 in the lifted condition shown in FIG. Otherwise the braking effect would be too great.

Die aus den beiden Traktoren 4 und 5 sowie den Zahnrädern 17 und 18 gebildete Stifte aufweisende Transportvorrichtung ist zweckmäßigerweise als eine zusammengehörende Baugruppe ausgebildet und auf einfache Weise in den in den Figuren nicht dargestellten Rahmen einsteck- und arretierbar. Die antriebsmäßige Kopplung bei Aufstecken einer solchen Stifte aufweisenden Transportvorrichtung auf den vorgesehenen Walzenantrieb erfolgt dann über die Zahnradanordnung, die im Ausführungsbeispiel aus den Zahnrädern 19 und 22, verbunden über eine feste Hülse 23, besteht. Wie bereits erwähnt, kann auch ein einziges Zahnrad, wenn dies die Übersetzungsverhältnisse und die Platzverhältnisse zulassen oder erforderlich machen, dafür vorgesehen sein.The transport device comprising pins formed from the two tractors 4 and 5 and the gears 17 and 18 is expediently designed as an associated assembly and can be inserted and locked in a simple manner in the frame (not shown in the figures). The drive coupling when such a pin having a transport device is attached to the intended roller drive then takes place via the gear arrangement, which in the exemplary embodiment consists of the gears 19 and 22, connected via a fixed sleeve 23. As already mentioned, a single gearwheel can also be provided for this, if the transmission ratios and the space conditions permit or necessitate this.

Die erfindungsgemäß gestaltete Papiertransportvorrichtung dient verschiedenen Zwecken. Es sei zunächst der Fall betrachtet, daß eine Endlosformularbahn mit Randlochungen in die in den Figuren gezeigte Transportvorrichtung eingelegt werden soll. Dazu wird das Handrad 30 mit dem Rastrad 28 von der Bedienungsperson nach links in eine Position verschoben, in welcher das von der Raste 33 freigegeben ist, jedoch noch nicht so weit, daß die beiden Kupplungsteile 24 und 26 miteinander im Eingriff stehen.The paper transport device designed according to the invention serves various purposes. Let us first consider the case where an endless form web with perforations in the edge is to be inserted into the transport device shown in the figures. For this purpose, the handwheel 30 with the ratchet wheel 28 is shifted to the left by the operator into a position in which this is released by the detent 33, but not so far that the two coupling parts 24 and 26 are in engagement with one another.

Durch die drehfeste Verbindunq über das Langloch 31 und den Stift 32 ist das Handrad 30 drehfest mit der Welle 3 verbunden. Dadurch wird die Druckwalze 1 bei Verdrehung des Handrades 30 verdreht, ohne daß dabei über die nicht eingekoppelte Zahnradverbindung 21, 23, 22 sowie das Zwischenrad 18 und das Antriebszahnrad 17 die beiden Traktoren 4 und 5 aedreht werden. Dies deswegen, weil die Zahnradverbindung, bestehend aus den beiden Zahnrädern 19 und 22, freilaufend auf der Welle 3 angeordnet ist. Somit ist in dieser Zwischenposition des Rastrades 28 die Möglichkeit gegeben, die Druckwalze 1 über das Handrad 30 zum Einfädeln der Papierbahn, die von hinten zugeführt wird, zu ermöglichen, ohne daß die Stifte aufweisende Transportvorrichtung gleichzeitig mitgedreht wird. Die Papierandrückrollen 36 sind zweckmäßigerweise bei diesem Arbeitsgang von der Druckwalze 1 abgehoben. Somit läßt sich das Papiereinführen und Papiereinlegen leicht von Hand vornehmen. Hat man genügend Papier über die als Friktionsantrieb dienende Druckwalze 1 vorgeschoben, kann bei aufgeklappten Deckeln 16 die randperforierte Papierbahn 2 in die Stifte 15 lagegerecht eingelegt werden.Due to the non-rotatable connection via the slot 31 and the pin 32, the handwheel 30 is connected to the shaft 3 in a rotationally fixed manner. As a result, the pressure roller 1 is rotated when the handwheel 30 is rotated, without the need for the non-coupled gear connection 21, 23, 22 and the intermediate wheel 18 and the drive gear 17, the two tractors 4 and 5 are rotated. This is because the gear connection, consisting of the two gear wheels 19 and 22, is arranged freely on the shaft 3. Thus, in this intermediate position of the ratchet wheel 28, there is the possibility of enabling the pressure roller 1 via the handwheel 30 to thread the paper web, which is fed from behind, without the transport device having the pins being rotated at the same time. The paper pressure rollers 36 are expediently lifted off the printing roller 1 in this operation. This makes it easy to insert and insert paper by hand. If you have fed enough paper over the pressure roller 1 serving as a friction drive, the edge-perforated paper web 2 can be inserted into the pins 15 in the correct position with the lid 16 open.

Um nunmehr nach erfolgter Einlegung der Papierbahn 2, den Antrieb über die Stifte tragende Transportvorrichtung vornehmen zu können, wird das Handrad 30 mit dem Rastrad 28 so weit weiter in axialer Richtung nach links (vgl. Fig. 1) verschoben, daß die Nasen 27 des zweiten Kupplungsteils 26 in die Schlitze 25 des ersten Kupplungsteils 24 eingreifen und somit eine Verbindung zwischen dem Zahnrad 22 und über die aus Langloch 31 und Stift 32 bestehende Verbindung drehfest mit der Welle 3 und damit der Druckwalze 1 verbunden sind. Somit können nun sowohl die Druckwalze 1 als auch die Traktoren 4 und 5 weiterhin von Hand über das Handrad 30 gemeinsam verdreht werden. Andererseits ist es bei dieser Stellung des Handrades 30 möglich, daß über den Schrittmotor 20 und dessen Antriebszahnrad 21 sowie das Zahnrad 22, die Hülse 23 und das Zahnrad 19 die Traktoren 4 und 5 einerseits, sowie andererseits über die Verbindung Langloch 31 und Stift 32, die Druckwalze 1 gemeinsam vom Motor 20 angetrieben werden. Somit drehen sich in dieser Stellung also Druckwalze 1 und Stifte aufweisende Transportvorrichtung 4 und 5 gemeinsam.In order now to be able to carry out the drive via the pins carrying transport device after inserting the paper web 2, the handwheel 30 with the ratchet wheel 28 is moved so far in the axial direction to the left (see FIG. 1) that the lugs 27 of the second coupling part 26 engage in the slots 25 of the first coupling part 24 and thus a connection between the gear 22 and via the connection consisting of slot 31 and pin 32 are connected in a rotationally fixed manner to the shaft 3 and thus to the pressure roller 1. Thus, both the pressure roller 1 and the tractors 4 and 5 can still be rotated together by hand using the handwheel 30. On the other hand, with this position of the handwheel 30, it is possible for the tractors 4 and 5, on the one hand, and, on the other hand, for the connection of the elongated hole 31 and pin 32, via the stepper motor 20 and its drive gear 21 and the gear 22, the sleeve 23 and the gear 19. the pressure roller 1 are driven together by the motor 20. Thus, in this position, the pressure roller 1 and the pins 4 and 5 transport device rotate together.

Bei manchen Anwendungen kann es zweckmäßig sein, die Druckwalze 1 als Papierbremse zu verwenden, wenn die mit Randlochungen versehene Papierbahn 2 allein von den beiden Traktoren 4 und 5 vorgeschoben wird. Dazu wird das Handrad 30 mit dem Rastrad 28 in die in Fig. 1 dargestellte Position verbracht, bei der durch das Eingreifen der Raste 33 in eine Zahnlücke des Rastrades 28 die Welle 3 und damit die Druckwalze 1 verrastet sind und stillstehen. Der Schrittmotor 20 kann jedoch über sein Antriebszahnrad 21 und die auf der Welle 3 freilaufende Zahnradanordnung 19, 22, das Zwischenrad 18 und das Antriebszahnrad 17 über die Vierkantantriebswelle 6 die beiden Traktoren 4 und 5 antreiben.In some applications, it may be useful to use the pressure roller 1 as a paper brake if the paper web 2 provided with perforations at the edge is advanced by the two tractors 4 and 5 alone. For this purpose, the handwheel 30 is brought with the locking wheel 28 into the position shown in FIG. 1, in which the shaft 3 and thus the pressure roller 1 are locked and stand still due to the engagement of the detent 33 in a tooth gap of the locking wheel 28. However, the stepper motor 20 can drive the two tractors 4 and 5 via its drive gear 21 and the gear arrangement 19, 22 that freewheels on the shaft 3, the idler gear 18 and the drive gear 17 via the square drive shaft 6.

Sind die beiden Traktoren 4 und 5 in einem bestimmten Gerät nicht vorhanden, beispielsweise dann, wenn mittels der Druckwalze 1 Einzelblattformulare mit oder ohne Randlochung bedruckt und vorgeschoben werden sollen, dann erfolgt der Antrieb vom Schrittmotor 20 über dessen Antriebszahnrad 21 derart, daß das Zahnrad 22 über die eingekuppelten Kupplungsteile 24 und 26, bei Position des Handrads 30 in der in Fig. 1 am weitesten links befindlichen Stellung, oder in der Zwischenstellung die Antriebskraft über das Langloch 31 und den Stift 32 auf die Welle 3 der Druckwalze 1 überträgt. In diesem Falle liegen zweckmäßigerweise die Papierandrückrollen 36 an der Druckwalze 1 an. Sie dient damit als reiner Friktionsantrieb einerseits und andererseits als Auflage für die Druckvorrichtung 34.If the two tractors 4 and 5 are not present in a particular device, for example if single sheet forms with or without marginal perforation are to be printed and fed by means of the printing roller 1, then the stepper motor 20 is driven via its drive gear 21 in such a way that the gear 22 1, or in the intermediate position, transmits the driving force via the elongated hole 31 and the pin 32 to the shaft 3 of the pressure roller 1 via the coupled coupling parts 24 and 26, when the handwheel 30 is in the position on the left in FIG. 1, or in the intermediate position. In this case, the paper pressure rollers 36 are expediently in contact with the printing roller 1. It thus serves as a pure friction drive on the one hand and on the other hand as a support for the printing device 34.

Die in den Figuren dargestellte Stifte aufweisende Transportvorrichtung besteht aus zwei Traktoren 4 und 5. Anstelle dieser Traktoren kann auch eine sogenannte Stachelwalzen-Transportvorrichtung benutzt werden, die zur Führung von randgelochten Papierbahnen an den Rändern zwei Stacheln aufweisende Walzen relativ großen Durchmessers enthält. Des weiteren kann die aus den beiden Zahnrädern 19 und 22 bestehende Zahnradanordnung durch ein einziges, auf der Welle 3 freilaufendes Zahnrad ersetzt werden, das mit dem Antriebsritzel 21 des Schrittschaltmotors 20 kämmt und von diesem angetrieben wird. Der Schrittschaltmotor 20 wird auf bekannte Weise dazu benutzt, um dem Vorschub der Papierbahn beim Drucken in der gewünschten Weise schrittweise vorzunehmen.The transport device shown in the figures has two tractors 4 and 5. Instead of these tractors, a so-called spiked roller transport device can also be used, which contains rolls of relatively large diameters with perforations on the edges for guiding perforated paper webs. Furthermore, the gear arrangement consisting of the two gear wheels 19 and 22 can be replaced by a single gear wheel running freely on the shaft 3, which meshes with the drive pinion 21 of the stepping motor 20 and is driven thereby. The stepping motor 20 is used in a known manner to gradually feed the paper web in the desired manner during printing.

Die erfindungsgemäß gestaltete Papiertransportvorrichtung ist in Daten- bzw. Aufzeichnungen schreibenden Geräten verschieden einsetzbar, wie dies vorstehend beschrieben wurde. Ein besonders geeignetes Einsatzfeld sind die sogenannten Terminaldrucker, die aufgrund der Flexibilität der erfindungsgemäßen Transportvorrichtung an verschiedene Zwecke, wie beispielsweise dem Endlosformularvorschub mit randgelochten Bahnen oder die Einzelblattzuführung und Vorschiebung mit der Druckwalze allein als Friktionstrieb, angewendet werden kann. Somit ist die erfindungsgemäß gestaltete Papiertransportvorrichtung sehr flexibel in ihren Einsatzmöglichkeiten, für die Bedienungsperson komfortabel und einfach zu bedienen und vom Aufbau her einfach und zweckmäßig gestaltet.The paper transport device designed according to the invention can be used in various ways in devices which write data or recordings, as was described above. A particularly suitable field of application are the so-called terminal printers, which, due to the flexibility of the transport device according to the invention, can be used for various purposes, such as for example the continuous form feed with perforated webs or the single sheet feeding and feeding with the printing roller solely as a friction drive. Thus, the paper transport device designed according to the invention is very flexible in its possible uses, comfortable and easy to use for the operator and structurally simple and functional.

Claims (10)

1. Sheet or web feeding device for a printing apparatus, in particular a terminal printer, with a print roll (1) used for advance and support purposes, with feeding means for marginally perforated forms, which, viewed in the direction of feed, is arranged behind the print roll (1) and is provided with pins (15), a controllable step drive for providing the advance force, a free-running gear arrangement on the shaft (3) of the print roll (1), which can be driven by a step drive, and wherein the feeding means provided with the pins (15) can be made to drivingly engage the gear arrangement, characterized in that
a) a toothed ratchet wheel (28) is arranged non-rotatable and axially shiftable on the shaft (3) of the print roll (1),
b) the ratchet wheel (28) is provided with a second coupling part (26, 27) which can be made to engage a first coupling part (24, 25),
c) when the ratchet wheel (28) is decoupled and non-rotatably latched by a detent (33), the feeding means (4, 5) provided with the pins (15) is solely connected to the step drive (20, 21) through the free-running gear arrangement (19, 23, 22), while the print roll (1) is inoperative,
d) when the gear arrangement (19, 23, 22) and ratchet wheel (28) are coupled, while the ratchet wheel (28) is unlatched and thus rotatable, both the print roll (1), through the shaft (3), and the feeding means (4, 5) provided with the pins (15) are drivingly connected to the step drive (20, 21).
2. A device according to claim 1, characterized in that, with the ratchet wheel (28) and gear arrangement (19, 23, 22) in an intermediate position between coupled and decoupled, the ratchet wheel (28) is unlatched from the detent (33), only the feeding means (4, 5) provided with the pins is connected to the step drive (20, 21).
3. A device according to claim 1 or 2, characterized in that the free-running gear arrangement (19, 23, 22) consists of one or two axially spaced toothed wheels (19, 22) rigidly connected by a connecting sleeve (23).
4. A device according to any one of claims 1 to 3, characterized in that a handwheel (30) is connected to the ratchet wheel (28) by a sleeve (29).
5. A device according to any one of the preceding claims, characterized in that the non-rotatable and axially shiftable connection between the ratchet wheel (28) and shaft (3) of the print roll (1) is effected by a pin (32) fixed to the shaft (3) and disposed in an axial slot (31) provided in a sleeve (29) rigidly secured to the ratchet wheel (28).
6. A device according to any one of the preceding claims, characterized in that the feeding means (4, 5) provided with the pins (15) is detachably connected to the device and is designed as a detachable or attachable unit.
7. A device according to any one of the preceding claims, characterized in that an electric stepper motor (20) is provided as the controllable step drive.
8. A device according to any one of the preceding claims, characterized in that the first coupling part (24) is provided with slots (25) and the second coupling part (26) with lugs (27) which can be introduced into the slots (25).
9. A device according to any one of the preceding claims, characterized in that the feeding means (4, 5) provided with the pins (15) is connected to the gear arrangement (19, 23, 22) through two toothed wheels (17,18).
10. A device according to any one of the preceding claims, characterized in that arcuate paper brake springs (35) resting against the print roll (1) and/or paper support rolls (36) which can be applied to the print roll (1) are provided.
EP78101786A 1977-12-27 1978-12-20 Sheet or web feeding device for a printing apparatus Expired EP0002796B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2758148 1977-12-27
DE2758148A DE2758148C2 (en) 1977-12-27 1977-12-27 Paper transport device for the transport of single or continuous forms in a writing device

Publications (2)

Publication Number Publication Date
EP0002796A1 EP0002796A1 (en) 1979-07-11
EP0002796B1 true EP0002796B1 (en) 1981-09-02

Family

ID=6027374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78101786A Expired EP0002796B1 (en) 1977-12-27 1978-12-20 Sheet or web feeding device for a printing apparatus

Country Status (5)

Country Link
EP (1) EP0002796B1 (en)
JP (1) JPS5492815A (en)
CA (1) CA1085426A (en)
DE (2) DE2758148C2 (en)
IT (1) IT1202808B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH022604Y2 (en) * 1981-01-21 1990-01-22
JPS5833486A (en) * 1981-04-09 1983-02-26 セントロニクス・デ−タ・コンピユ−タ−・コ−ポレ−シヨン Paper feeding system for printer
JPS5829446U (en) * 1981-08-20 1983-02-25 セイコーエプソン株式会社 printer paper feeder
DE3214549C2 (en) * 1982-04-20 1985-01-17 Siemens AG, 1000 Berlin und 8000 München Transport device for folding paper with punched edges and for roll paper
DE3230190C2 (en) * 1982-08-13 1984-12-06 Siemens AG, 1000 Berlin und 8000 München Paper feeding device for printer equipment
DE3232875A1 (en) * 1982-09-02 1984-03-08 Mannesmann AG, 4000 Düsseldorf Paper transporting device for printers, in particular dot matrix printers
GB2139149B (en) * 1983-03-04 1986-06-25 Canon Kk Sheet advancing device
SE446839B (en) * 1984-03-01 1986-10-13 Philips Norden Ab DEVICE FOR SUPPLY OF QUITTO AND / OR JOURNAL TAPE
DE3621512A1 (en) * 1986-06-25 1988-01-07 Siemens Ag METHOD FOR PRODUCING A PAPER TRANSPORT ROLLER AND THE USE THEREOF IN A PRINTING DEVICE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1561310A1 (en) * 1967-03-10 1970-04-02 Sis S A Device on typewriters
US3753483A (en) * 1970-03-20 1973-08-21 Memorex Corp Typewriter dual feed apparatus
GB1369518A (en) * 1972-03-14 1974-10-09 Int Computers Ltd Web feeding apparatus
US3880016A (en) * 1974-03-07 1975-04-29 Qume Corp Variable displacement apparatus for platen and tractor feed
IT1022388B (en) * 1974-09-27 1978-03-20 Honeywell Inf Systems PAPER TRANSPORT MECHANISM FOR MULTIPLE COPY PRINTERS

Also Published As

Publication number Publication date
JPS5492815A (en) 1979-07-23
EP0002796A1 (en) 1979-07-11
DE2861046D1 (en) 1981-11-26
CA1085426A (en) 1980-09-09
DE2758148C2 (en) 1980-01-10
DE2758148B1 (en) 1979-05-10
IT7830727A0 (en) 1978-12-12
IT1202808B (en) 1989-02-09

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