EP0234589B1 - Paper-feeding device for printers - Google Patents

Paper-feeding device for printers Download PDF

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Publication number
EP0234589B1
EP0234589B1 EP87102805A EP87102805A EP0234589B1 EP 0234589 B1 EP0234589 B1 EP 0234589B1 EP 87102805 A EP87102805 A EP 87102805A EP 87102805 A EP87102805 A EP 87102805A EP 0234589 B1 EP0234589 B1 EP 0234589B1
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EP
European Patent Office
Prior art keywords
paper
roller
feed roller
paper feed
pressure roller
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Expired - Lifetime
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EP87102805A
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German (de)
French (fr)
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EP0234589A3 (en
EP0234589A2 (en
Inventor
Jeffrey Lee Gates
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Individual
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Individual
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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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/08—Sound-deadening, or shock-absorbing stands, supports, cases or pads separate from machines
    • 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
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles

Definitions

  • the invention relates to a paper transport device with rollers for feeding and removing continuous paper for printing devices.
  • Noise protection covers have also been used in this context.
  • the continuous paper is fed from a paper supply through a slot in the rear wall of the soundproofing cover to the printing device.
  • the side edges of the continuous paper are protected by special precautions on the way between the said entry slot and the printing device.
  • the paper is again guided to the rear wall of the soundproofing cover and is transported out of the soundproofing cover again through a second slot, which is located above the first.
  • the continuous paper is then collected on a table, on the floor or in a basket.
  • FR-A-90 77 83 describes a paper transport device with a first roller, from which a paper web is unwound, a second roller on which the paper web is wound, and an intermediate third roller, with the paper web located on the first two rollers is in contact.
  • the first two rollers rotate at certain speeds, which depend on the diameter of the paper being wound during the operation of the transport device.
  • the transport speed of the paper web always corresponds to the peripheral speed of the two first-mentioned rolls wound with paper. There is no direct and non-positive connection between the shafts of the first two rolls.
  • the invention has for its object to provide a paper transport device for feeding and removing continuous paper for printing devices, which ensures trouble-free, in particular paper jam-free feeding and removal of the paper to and from the printing device over an arbitrary long period of time.
  • the transport device does not require an additional motor or any other drive unit.
  • the energy for the operation of the transport device is taken from the energy with which the printing device draws in the continuous paper.
  • This paper inevitably passes through the nip between the paper feed roller and the paper pressure roller.
  • the pressure these two rollers exert on one another is sufficient to pass the continuous paper between them with practically no slippage and to drive them at the same time.
  • the force transmission means between the paper feed roller and the paper feed roller cause an inevitable rotation of the paper feed roller, which also bears against the paper pressure roller, so that the paper feed roller, the paper feed roller and the paper pressure roller rotate simultaneously.
  • the printed continuous paper running out of the printing device is passed between the paper pull-out roller and the paper pressure roller and thus inevitably transported away from the printing device.
  • the transport system consisting of the three rollers can also be easily arranged on a soundproofing device, for example in the rear wall of a soundproofing hood covering the pressure device. Since the three rollers lie close together and thereby the opening in practically completely seal the rear wall of the noise protection hood, the desired sound insulation is guaranteed in addition to the reliable paper transport.
  • the clear distance between the paper feed roller and the paper feed roller is smaller than the diameter of the paper pressure roller.
  • the paper pressure roller can easily be pressed simultaneously onto the paper feed roller and the paper extraction roller. This largely prevents slippage between the rollers and the continuous paper, and the nips are kept very small.
  • the paper pressure roller can be pressed against both the paper feed roller and the paper extraction roller by means of springs. This allows the pressure of the paper pressure roller to be adjusted to the thickness and quality of the continuous paper.
  • the spring force also helps to reduce the slippage between the continuous paper and the rollers.
  • gears or toothed belt pulleys with a toothed belt are provided as force transmission means between the paper feed roller and the paper extraction roller. This construction is very simple and inexpensive to manufacture.
  • the force transmission means are dimensioned such that the paper pull-out roller rotates at a higher peripheral speed compared to the paper feed roller.
  • a constant transport of the continuous paper is achieved and it is excluded that a paper jam occurs between the printing device and the paper extraction roller.
  • the higher peripheral speed of the paper draw-out roller causes a constant, directed away from the printing device on the continuous paper. This train is always kept small by a slip between the continuous paper on the one hand and the paper pull-out roller and the paper pressure roller on the other.
  • the paper feed roller, the paper extraction roller and the paper pressure roller each have a shaft made of steel and a roller surface made of foam.
  • a particularly preferred embodiment of the paper transport device consists in the fact that the paper feed roller, the paper extraction roller and the paper pressure roller are arranged in a wall of a soundproof housing for the printing device.
  • the soundproof housing 1 shows a section through a soundproof housing 1 in the region of its rear wall 2.
  • the soundproof housing 1 is provided with a cover 3 which can be opened and closed via a hinge 4.
  • the soundproof housing 1 and the cover 3 are lined on the inside with a sound-insulating foam 5.
  • a paper feed roller 8, a paper pressure roller 9 and a paper extraction roller 10 are rotatably supported one above the other in the rear wall 2 of the soundproof housing 1.
  • These three rollers 8, 9, 10 have approximately the have the same diameter from 30 to 35 mm and are each constructed from a metal shaft 11, 12, 13 and a foam layer 14, 15, 16 applied thereon.
  • This foam is a very dense sound-insulating foam, which is available, for example, under the trade name PE 60.
  • the length of the rollers 8, 9, 10 is, for example, approximately 420 mm each.
  • the roll circumference is exactly cylindrical, which is achieved by turning the foam rubber on a lathe.
  • the paper feed roller 8 and the paper feed roller 10 are positioned vertically one above the other at a distance. This distance is less than the diameter of the paper pressure roller 9, so that it is laterally offset in the direction of the outside of the soundproofing housing 1 between the paper feed roller 8 and the paper extraction roller 10 and bears against these two rollers 8, 10.
  • a coil spring 17 it is indicated schematically that the paper pressure roller 9 is pressed against the paper feed roller 8 and the paper extraction roller 10, with a coil spring 17 being located at each end of the paper pressure roller 9.
  • a toothed belt pulley 22 is attached to one end of the metal shaft 11 of the paper feed roller 8.
  • a toothed belt 23 connects the toothed belt pulley 22 with a further toothed belt pulley 24 at one end of the metal shaft 13 of the paper pull-out roller 10.
  • the paper feed roller 8 and the paper pull-out roller 10 are non-positively connected to one another, and at the same time the toothed belt pulleys 22, 24 and the toothed belt 23 are independent of the paper pressure roller 9.
  • the sizes of the toothed belt pulleys 22, 24 are such that the paper pull-out roller 10 rotates at a higher peripheral speed than the paper feed roller 8.
  • the system of toothed belt pulleys 22, 24 and toothed belt 23 can also be replaced only by toothed wheels, such as intermediate pinions, or equivalent power transmission means.
  • the position and the direction of movement of the continuous paper brought up to the printing device 6 by the transport device are represented by a dashed line 25 and an arrow 26.
  • the continuous paper leaving the printing roller 7 of the printing device 6 is explained in a corresponding manner by the dashed line 27 and the arrow 28.
  • FIG. 2 shows a view of one end of the paper feed roller 8 and the paper extraction roller 10 with their storage in a bearing plate 19 (partially broken open) and with the force transmission means in the form of the toothed belt pulleys 22, 24 and the toothed belt 23.
  • FIG 2 the paper pressure roller 9 omitted.
  • the paper feed roller 8 is shown with its storage in the view
  • the paper extraction roller 10 is shown with its storage in section. It can be seen that both rollers 8, 10 with their metal shafts 11, 13 are each mounted in a plastic sleeve 20.
  • a toothed belt pulley 22, 24 is fastened on the metal shaft 11 of the paper feed roller 8 and on the metal shaft 13 of the paper extraction roller 10 by means of axially fastened screws 29.
  • the toothed belt 23 runs over the toothed belt pulleys 22, 24.
  • Fig. 3 shows an insight into the soundproofing housing 1 with the cover 3 open in the direction of the rear wall 2 of the soundproofing housing 1.
  • a continuous paper 27 emerging from the printing device 6 is guided out of the soundproofing housing 1 through the nip between the paper pressure roller 9 and the paper extraction roller 10.
  • Fig. 4 shows a view of the transport device on the outside of the rear wall 2 of the soundproof housing 1.
  • the rollers 8, 9, 10 are mounted in the two bearing plates 19, which are each fastened to the rear wall 2 of the soundproof housing 1 with two screws 30.
  • Fig. 5 shows a part of the paper transport device on the outside of the soundproof housing 1, wherein the paper pressure roller 9 is pulled out of the bearing plate 19 a little to make it easier to see.
  • the bearing of the paper pressure roller 9 is held in its operating position by the (not recognizable) coil spring 17.
  • the continuous paper is passed between the paper feed roller 8 and the paper pressure roller 9, then around the pressure roller 7 of the printing device 6 and finally between the paper pressure roller 9 and the paper extraction roller 10.
  • the paper pressure roller 9 can be raised in its position between the paper feed roller 8 and the paper extraction roller 10 or removed completely from this position and then inserted again.
  • the printing roller 7 rotates in the direction of the arrow 31 in FIG. 1 and pulls the continuous paper into the printing device 6 in accordance with the dashed line 25.
  • the paper pressure roller 9 is pressed sufficiently firmly against the paper feed roller 8 by means of the coil springs 17. This largely prevents slippage between the continuous paper and these two rollers 8, 9.
  • the drawing of the paper into the printing device 6 therefore causes the paper feed roller 8 and the paper pressure roller 9 to rotate.
  • the force-locking connection between the paper feed roller 8 and the paper extraction roller 10 inevitably sets the latter in rotation.
  • This rotation is also transmitted to the paper pressure roller 9, which is also pressed onto the paper extraction roller 10 by means of the coil springs 17.
  • the continuous paper shown by the dashed line 27 and discharged from the printing device 6 is gripped in the nip between the paper pressure roller 9 and the paper extraction roller 10 and pulled away from the printing device 6. In this way, no paper jam can form in the area A of the continuous paper between the printing roller 7 and the paper extraction roller 10.
  • the tension on the continuous paper in the area A is constant, since the force transmission means between the paper feed roller 8 and the paper feed roller 10 are dimensioned such that the paper feed roller 10 rotates at a higher peripheral speed than the paper feed roller 8.
  • the drive for the paper transport device thus occurs in such a way that the continuous paper drawn in by the pressure roller 7 of the printing device 6 takes the paper feed roller 8 and the paper pressure roller 9 largely without slippage.
  • a separate motor for the paper transport device is therefore unnecessary.
  • the rollers 8, 9, 10 are arranged such that a direction of movement of the continuous paper inevitably between the paper feed roller 8 and the paper pressure roller 9 in the direction of the printing device 6 and between the paper pressure roller 9 and the paper extraction roller 10 a direction of movement of the paper away from the printing device 6 results.
  • the paper transport speed can be adjusted so that the continuous paper is pulled away from the printing device 6 at a higher speed than it is from this itself is drawn in. This ensures safe paper transport without jamming and jamming the continuous paper.

Landscapes

  • Handling Of Continuous Sheets Of Paper (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Description

Die Erfindung betrifft eine Papiertransportvorrichtung mit Walzen zum Zu- und Abführen von Endlospapier für Druckeinrichtungen.The invention relates to a paper transport device with rollers for feeding and removing continuous paper for printing devices.

Derartige Einrichtungen, wie Drucker für elektronische Datenverarbeitungsanlagen, werden häufig mit Endlospapier beschickt. Dementsprechend muß die zu bedruckende Papierbahn kontinuierlich der Druckeinrichtung zugeführt und nach dem Bedrucken wieder gleichmäßig abgeführt werden. Dieser Papiertransport wird relativ häufig von Störungen unterbrochen, weil sich die Papierbahn in den Führungskanälen außerhalb der Druckeinrichtung verklemmt oder staut. Die Folge ist dann oft ein schlechter oder gar unleserlicher Druck.Devices of this type, such as printers for electronic data processing systems, are often loaded with continuous paper. Accordingly, the paper web to be printed must be continuously fed to the printing device and removed again evenly after printing. This paper transport is relatively frequently interrupted by malfunctions because the paper web jams or jams in the guide channels outside the printing device. The result is often bad or even illegible printing.

Ein einwandfreier Papiertransport ist dann noch schwieriger, wenn eine solche Druckeinrichtung zur Geräuschminderung mit einer Schallschutzhaube abgedeckt oder vollkommen in ein Schallschutzgehäuse eingeschlossen ist. In diesen Fällen muß das Endlospapier zusätzlich durch die Schallschluckhaube oder das Schallschluckgehäuse hindurchgeführt werden. Jede weitere Öffnung darin bedeutet aber eine Schwächung des Schallschutzes.Correct paper transport is even more difficult if such a pressure device for noise reduction is covered with a soundproof hood or is completely enclosed in a soundproof housing. In these cases, the continuous paper must also be fed through the sound absorption hood or housing. Every further opening in it means a weakening of the sound insulation.

Um den Papiertransport zu und von Druckeinrichtungen reibungsloser zu gestalten, wurden bereits verschiedene Versuche unternommen. So ist es z.B. bekannt, das Endlospapier über Stäbe, Rohre oder Holzwalzen gleiten zu lassen, um bei der Papierbewegung die Reibung herabzusetzen. Dem gleichen Zeck dienen besondere Ständer, Führungsstäbe und Räder, um den Lauf des Papiers in der gewünschten Richtung zu halten.Various attempts have already been made to make paper transport to and from printing devices smoother. For example, it is known to let the continuous paper slide over rods, pipes or wooden rollers in order to reduce the friction during the paper movement. Special stands, guide rods and wheels serve the same purpose to keep the paper running in the desired direction.

In diesem Zusammenhang wurden auch schon Schallschutzabdeckungen eingesetzt. In diesen Fällen wird das Endlospapier von einem Papiervorrat durch einen Schlitz in der Rückwand der Schallschutzabdeckung an die Druckeinrichtung herangeführt. Innerhalb der Schallschutzabdeckung werden die Seitenkanten des Endlospapiers auf dem Wege zwischen dem genannten Eintrittsschlitz und der Druckeinrichtung durch besondere Vorkehrungen geschützt. Nach dem Durchlaufen der Druckeinrichtung wird das Papier wieder zu der Rückwand der Schallschutzabdeckung geleitet und dort durch einen zweiten Schlitz, der sich über dem ersten befindet, wieder aus der Schallschutzabdeckung heraustransportiert. Das Endlospapier wird dann auf einem Tisch, auf dem Boden oder in einem Korb gesammelt.Noise protection covers have also been used in this context. In these cases, the continuous paper is fed from a paper supply through a slot in the rear wall of the soundproofing cover to the printing device. Within the soundproofing cover, the side edges of the continuous paper are protected by special precautions on the way between the said entry slot and the printing device. After passing through the printing device, the paper is again guided to the rear wall of the soundproofing cover and is transported out of the soundproofing cover again through a second slot, which is located above the first. The continuous paper is then collected on a table, on the floor or in a basket.

Aber gerade mit solchen Schallschutzabdeckungen treten beim Zu- und Abführen von Endlospapier häufig Störungen auf. Dies wirkt sich vor allem dann unangenehm aus, wenn im Ernstfall nicht sofort eine Bedienungsperson zur Verfügung steht, die den gestörten Papierlauf umgehend korrigiert. Unbefriedigend ist außerdem, daß die Papierdurchführungsöffnungen in den bekannten Schallschutzabdeckungen den zu dämpfenden Schall ziemlich ungehindert nach außen treten lassen.But it is precisely with such noise protection covers that faults often occur when feeding and removing continuous paper. This is particularly unpleasant if, in an emergency, an operator is not immediately available to correct the faulty paper flow immediately. It is also unsatisfactory that the paper feedthrough openings in the known soundproofing covers allow the sound to be dampened to emerge rather unhindered.

Aus der JP-60-46282 ist eine drei Walzen aufweisende Papiertransportvorrichtung bekannt, die den Schallschutz einer Abdeckung für einen Drucker verbessern soll. Die mittlere Walze muß mittels Riemenscheiben und Treibriemen von der Druckwalze des Druckers angetrieben werden.From JP-60-46282 a three-roller paper transport device is known which is said to improve the soundproofing of a cover for a printer. The middle roller must be driven by the printer's pressure roller using pulleys and drive belts.

Die FR-A-90 77 83 beschreibt eine Papiertransportvorrichtung mit einer ersten Walze, von der eine Papierbahn abgewickelt wird, einer zweiten Walze, auf welche die Papierbahn aufgewickelt wird, und einer dazwischenliegenden dritten Walze, die mit der auf den beiden erstgenannten Walzen befindlichen Papierbahn in Berührung ist. Als Folge davon rotieren die beiden erstgenannten Walzen mit bestimmten Geschwindigkeiten, die sich während des Betriebs der Transportvorrichtung in Abhängigkeit vom Durchmesser des jeweils aufgewickelten Papiers abhängt. Weiterhin ergibt sich dabei, daß die Transportgeschwindigkeit der Papierbahn immer der Umfangsgeschwindigkeit der mit Papier bewickelten beiden erstgenannten Walzen entspricht. Eine direkte und kraftschlüssige Verbindung zwischen den Wellen der beiden erstgenannten Walzen besteht nicht.FR-A-90 77 83 describes a paper transport device with a first roller, from which a paper web is unwound, a second roller on which the paper web is wound, and an intermediate third roller, with the paper web located on the first two rollers is in contact. As a result, the first two rollers rotate at certain speeds, which depend on the diameter of the paper being wound during the operation of the transport device. Furthermore, it follows that the transport speed of the paper web always corresponds to the peripheral speed of the two first-mentioned rolls wound with paper. There is no direct and non-positive connection between the shafts of the first two rolls.

Der Erfindung liegt die Aufgabe zugrunde, eine Papiertransportvorrichtung zum Zu- und Abführen von Endlospapier für Druckeinrichtungen anzugeben, die über einen beliebig langen Zeitraum ein störungsfreies, insbesondere papierstaufreies Zu- und Abführen des Papiers an die bzw. von der Druckeinrichtung gewährleistet.The invention has for its object to provide a paper transport device for feeding and removing continuous paper for printing devices, which ensures trouble-free, in particular paper jam-free feeding and removal of the paper to and from the printing device over an arbitrary long period of time.

Diese Aufgabe wird erfindungsgemäß durch eine Papiertransportvorrichtung gemäß dem Patentanspruch 1 gelöst.This object is achieved according to the invention by a paper transport device according to claim 1.

Durch diese Ausgestaltung wird erreicht, daß das Endlospapier in stets der gleichen Richtung und genau transportiert wird, ohne sich zu verklemmen. Die Transportvorrichtung benötigt keinen zusätzlichen Motor oder ein sonstiges Antriebsaggregat. Die Energie für den Betrieb der Transportvorrichtung wird jener Energie entnommen, mit welcher die Druckeinrichtung das Endlospapier einzieht. Dieses Papier durchläuft zwangsläufig den Walzenspalt zwischen der Papiereinzugswalze und der Papieranpreßwalze. Der Druck, den diese beiden Walzen aufeinander ausüben, reicht aus, um das Endlospapier praktisch ohne Schlupf zwischen ihnen hindurchzuführen und sie gleichzeitig anzutreiben. Die Kraftübertragungsmittel zwischen der Papiereinzugswalze und der Papierauszugswalze bewirken eine zwangsläufige Rotation der Papierauszugswalze, die außerdem noch an der Papieranpreßwalze anliegt, so daß sich die Papiereinzugswalze, die Papierauszugswalze und die Papieranpreßwalze gleichzeitig drehen. Dabei wird das aus der Druckeinrichtung auslaufende, bedruckte Endlospapier zwischen der Papierauszugswalze und der Papieranpreßwalze hindurchgeführt und so zwangsläufig von der Druckeinrichtung abtransportiert. Das aus den drei Walzen bestehende Transportsystem kann auch leicht an einer Schallschutzvorrichtung, beispielsweise in der Rückwand einer die Druckeinrichtung abdeckenden Schallschutzhaube, angeordnet werden. Da die drei Walzen eng aneinander liegen und dadurch die Öffnung in der Rückwand der Schallschutzhaube praktisch vollständig verschließen, ist neben dem zuverlässigen Papiertransport auch der gewünschte Schallschutz gewährleistet.This configuration ensures that the continuous paper is always transported in exactly the same direction and without jamming. The transport device does not require an additional motor or any other drive unit. The energy for the operation of the transport device is taken from the energy with which the printing device draws in the continuous paper. This paper inevitably passes through the nip between the paper feed roller and the paper pressure roller. The pressure these two rollers exert on one another is sufficient to pass the continuous paper between them with practically no slippage and to drive them at the same time. The force transmission means between the paper feed roller and the paper feed roller cause an inevitable rotation of the paper feed roller, which also bears against the paper pressure roller, so that the paper feed roller, the paper feed roller and the paper pressure roller rotate simultaneously. In this case, the printed continuous paper running out of the printing device is passed between the paper pull-out roller and the paper pressure roller and thus inevitably transported away from the printing device. The transport system consisting of the three rollers can also be easily arranged on a soundproofing device, for example in the rear wall of a soundproofing hood covering the pressure device. Since the three rollers lie close together and thereby the opening in practically completely seal the rear wall of the noise protection hood, the desired sound insulation is guaranteed in addition to the reliable paper transport.

Gemäß einer bevorzugten Ausführungsform der Erfindung ist der lichte Abstand zwischen der Papiereinzugswalze und der Papierauszugswalze kleiner als der Durchmesser der Papieranpreßwalze bemessen. Dadurch kann die Papieranpreßwalze problemlos gleichzeitig an die Papiereinzugswalze und die Papierauszugswalze angedrückt werden. So wird ein Schlupf zwischen den Walzen und dem Endlospapier weitgehend verhindert, und die Walzenspalte werden sehr klein gehalten.According to a preferred embodiment of the invention, the clear distance between the paper feed roller and the paper feed roller is smaller than the diameter of the paper pressure roller. As a result, the paper pressure roller can easily be pressed simultaneously onto the paper feed roller and the paper extraction roller. This largely prevents slippage between the rollers and the continuous paper, and the nips are kept very small.

Es hat sich als zweckmäßig erwiesen, wenn die Papieranpreßwalze einstellbar mittels Federn gegen sowohl die Papiereinzugswalze als auch die Papierauszugswalze andrückbar ist. Dadurch kann der Anpreßdruck der Papieranpreßwalze auf die Dicke und Qualität des Endlospapiers eingestellt werden. Außerdem hilft die Federkraft mit, den Schlupf zwischen dem Endlospapier und den Walzen zu verringern.It has proven to be expedient if the paper pressure roller can be pressed against both the paper feed roller and the paper extraction roller by means of springs. This allows the pressure of the paper pressure roller to be adjusted to the thickness and quality of the continuous paper. The spring force also helps to reduce the slippage between the continuous paper and the rollers.

Bei einer vorteilhaften Ausgestaltung der Papiertransportvorrichtung sind als Kraftübertragungsmittel zwischen der Papiereinzugswalze und der Papierauszugswalze Zahnräder oder Zahnriemenscheiben mit einem Zahnriemen, vorgesehen. Diese Konstruktion ist sehr einfach und kostengünstig herstellbar.In an advantageous embodiment of the paper transport device, gears or toothed belt pulleys with a toothed belt are provided as force transmission means between the paper feed roller and the paper extraction roller. This construction is very simple and inexpensive to manufacture.

In der Praxis werden die Kraftübertragungsmittel derart bemessen, daß die Papierauszugswalze mit einer höheren Umfangsgeschwindigkeit rotiert, verglichen mit der Papiereinzugswalze. Dadurch wird ein gleichbleibender Transport des Endlospapiers erreicht und es ist ausgeschlossen, daß zwischen der Druckeinrichtung und der Papierauszugswalze ein Papierstau auftritt. Die höhere Umfangsgeschwindigkeit der Papierauszugswalze verursacht einen ständigen, von der Druckeinrichtung weggerichteten Zug auf das Endlospapier. Dieser Zug wird aber durch einen Schlupf zwischen dem Endlospapier einerseits sowie der Papierauszugswalze und der Papieranpreßwalze andererseits stets klein gehalten.In practice, the force transmission means are dimensioned such that the paper pull-out roller rotates at a higher peripheral speed compared to the paper feed roller. As a result, a constant transport of the continuous paper is achieved and it is excluded that a paper jam occurs between the printing device and the paper extraction roller. The higher peripheral speed of the paper draw-out roller causes a constant, directed away from the printing device on the continuous paper. This train is always kept small by a slip between the continuous paper on the one hand and the paper pull-out roller and the paper pressure roller on the other.

Gemäß einer bevorzugten Ausführungsform der Erfindung weisen die Papiereinzugswalze, die Papierauszugswalze und die Papieranpreßwalze jeweils eine Welle aus Stahl und eine Walzenoberfläche aus Schaumstoff auf.According to a preferred embodiment of the invention, the paper feed roller, the paper extraction roller and the paper pressure roller each have a shaft made of steel and a roller surface made of foam.

Eine besonders bevorzugte Ausgestaltung der Papiertransportvorrichtung besteht darin, daß die Papiereinzugswalze, die Papierauszugswalze und die Papieranpreßwalze in einer Wand eines Schallschutzgehäuses für die Druckeinrichtung angeordnet sind.A particularly preferred embodiment of the paper transport device consists in the fact that the paper feed roller, the paper extraction roller and the paper pressure roller are arranged in a wall of a soundproof housing for the printing device.

Nachfolgend ist die Erfindung anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels erläutert.The invention is explained below using an exemplary embodiment shown schematically in the drawing.

Es zeigen:

Fig. 1
eine Teilansicht eines senkrechten Schnitts durch die Papiertransportvorrichtung, welche in der Rückwand eines Schallschutzgehäuses für eine Druckeinrichtung angeordnet ist;
Fig. 2
eine Teilansicht der Vorrichtung gemäß Fig. 1 im Bereich einer Lagerung der Papiereinzugswalze und der Papierauszugswalze, wobei letztere im Schnitt dargestellt und die Papieranpreßwalze weggelassen worden ist;
Fig. 3
eine perspektivische Ansicht des Inneren eines geöffneten Schallschutzgehäuses, in dem sich eine Druckeinrichtung befindet, aus der ein Endlospapier mittels der Papiertransportvorrichtung abgeführt wird;
Fig. 4
eine perspektivische Ansicht der Papiertransportvorrichtung in der Rückwand eines Schallschutzgehäuses; und
Fig. 5
eine perspektivische Teilansicht der Papiertransportvorrichtung an der Außenseite eines Schallschutzgehäuses im Bereich einer Lagerplatte der Walzen, mit aus der Lagerplatte herausgenommener Papieranpreßwalze.
Show it:
Fig. 1
a partial view of a vertical section through the paper transport device, which in the rear wall a soundproof housing for a printing device is arranged;
Fig. 2
a partial view of the device of Figure 1 in the area of storage of the paper feed roller and the paper extraction roller, the latter being shown in section and the paper pressure roller has been omitted.
Fig. 3
a perspective view of the inside of an open soundproof housing, in which there is a printing device from which an endless paper is removed by means of the paper transport device;
Fig. 4
a perspective view of the paper transport device in the rear wall of a soundproof housing; and
Fig. 5
a partial perspective view of the paper transport device on the outside of a soundproof housing in the region of a bearing plate of the rollers, with the paper pressure roller removed from the bearing plate.

In Fig. 1 ist ein Schnitt durch ein Schallschutzgehäuse 1 im Bereich von dessen Rückwand 2 dargestellt. Das Schallschutzgehäuse 1 ist mit einem Deckel 3 versehen, der über ein Scharnier 4 geöffnet und geschlossen werden kann. Das Schallschutzgehäuse 1 und der Deckel 3 sind an ihrer Innenseite mit einem schallisolierenden Schaumstoff 5 ausgekleidet.1 shows a section through a soundproof housing 1 in the region of its rear wall 2. The soundproof housing 1 is provided with a cover 3 which can be opened and closed via a hinge 4. The soundproof housing 1 and the cover 3 are lined on the inside with a sound-insulating foam 5.

In dem Schallschutzgehäuse 1 ist eine Druckeinrichtung 6, z.B ein Drucker einer elektronischen Datenverarbeitungseinrichtung, mit einer Druckwalze 7 angeordnet.A pressure device 6, for example a printer of an electronic data processing device, with a pressure roller 7 is arranged in the soundproofing housing 1.

Etwa in der Höhe der Druckwalze 7 sind in der Rückwand 2 des Schallschutzgehäuses 1 eine Papiereinzugswalze 8, eine Papieranpreßwalze 9 und eine Papierauszugswalze 10 übereinander drehbar gelagert. Diese drei Walzen 8, 9, 10 weisen etwa den gleichen Durchmesser von 30 bis 35 mm auf und sind jeweils aus einer Metallwelle 11, 12, 13 sowie einer darauf aufgebrachten Schaumstoffschicht 14, 15, 16 aufgebaut. Dieser Schaumstoff ist ein sehr dichter schallisolierender Schaumstoff, der beispielsweise unter der Handelsbezeichnung PE 60 erhältlich ist. Die Länge der Walzen 8, 9, 10 beträgt beispielsweise etwa jeweils 420 mm. Der Walzenumfang ist jeweils genau zylindrisch, was durch Abdrehen des Schaumgummis auf einer Drehbank erreicht wird.Approximately at the level of the pressure roller 7, a paper feed roller 8, a paper pressure roller 9 and a paper extraction roller 10 are rotatably supported one above the other in the rear wall 2 of the soundproof housing 1. These three rollers 8, 9, 10 have approximately the have the same diameter from 30 to 35 mm and are each constructed from a metal shaft 11, 12, 13 and a foam layer 14, 15, 16 applied thereon. This foam is a very dense sound-insulating foam, which is available, for example, under the trade name PE 60. The length of the rollers 8, 9, 10 is, for example, approximately 420 mm each. The roll circumference is exactly cylindrical, which is achieved by turning the foam rubber on a lathe.

Die Papiereinzugswalze 8 und die Papierauszugswalze 10 sind im Abstand senkrecht übereinander positioniert. Dieser Abstand ist geringer als der Durchmesser der Papieranpreßwalze 9, so daß diese in Richtung auf die Außenseite des Schallschutzgehäuses 1 seitlich versetzt zwischen der Papiereinzugswalze 8 und der Papierauszugswalze 10 angeordnet ist und an diesen beiden Walzen 8, 10 anliegt. Mittels einer Schraubenfeder 17 ist schematisch angedeutet, daß die Papieranpreßwalze 9 gegen die Papiereinzugswalze 8 und die Papierauszugswalze 10 gedrückt wird, wobei sich an jedem Ende der Papieranpreßwalze 9 jeweils eine Schraubenfeder 17 befindet.The paper feed roller 8 and the paper feed roller 10 are positioned vertically one above the other at a distance. This distance is less than the diameter of the paper pressure roller 9, so that it is laterally offset in the direction of the outside of the soundproofing housing 1 between the paper feed roller 8 and the paper extraction roller 10 and bears against these two rollers 8, 10. By means of a coil spring 17 it is indicated schematically that the paper pressure roller 9 is pressed against the paper feed roller 8 and the paper extraction roller 10, with a coil spring 17 being located at each end of the paper pressure roller 9.

An einem Rahmen 18 sind (nur in den Fig. 2, 3, 4 und 5 dargestellte) rechtwinklige Lagerplatten 19 befestigt, in denen die Papiereinzugswalze 8, die Papieranpreßwalze 9 und die Papierauszugswalze 10 mittels Kunststoffhülsen 20 (vgl. Fig. 2) drehbar gelagert sind. Die Enden der Papiereinzugswalze 8 und der Papierauszugswalze 10 sind in den Lagerplatten zwar drehbar, aber fest montiert, während die Enden der Papieranpreßwalze 9 in jeweils eine Ausnehmung 21 der Lagerplatten 19 eingelegt und dort mittels der Schraubenfedern 17 in der Betriebsstellung gehalten werden. Dadurch kann die Papieranpreßwalze 9, beispielsweise zum Einlegen des Endlospapiers, leicht aus der Transportvorrichtung teilweise oder ganz entnommen werden.On a frame 18 (only shown in FIGS. 2, 3, 4 and 5) rectangular mounting plates 19 are fastened, in which the paper feed roller 8, the paper pressure roller 9 and the paper extraction roller 10 are rotatably supported by means of plastic sleeves 20 (see FIG. 2) are. The ends of the paper feed roller 8 and the paper extraction roller 10 can be rotated in the bearing plates, but are firmly mounted, while the ends of the paper pressure roller 9 are each inserted into a recess 21 in the bearing plates 19 and held there in the operating position by means of the coil springs 17. As a result, the paper pressure roller 9 can be easily or partially removed from the transport device, for example for inserting the continuous paper.

An einem Ende der Metallwelle 11 der Papiereinzugswalze 8 ist eine Zahnriemenscheibe 22 befestigt. Ein Zahnriemen 23 verbindet die Zahnriemenscheibe 22 mit einer weiteren Zahnriemenscheibe 24 an einem Ende der Metallwelle 13 der Papierauszugswalze 10. Damit sind die Papiereinzugswalze 8 und die Papierauszugswalze 10 kraftschlüssig miteinander verbunden, und gleichzeitig sind die Zahnriemenscheiben 22, 24 und der Zahnriemen 23 von der Papieranpreßwalze 9 unabhängig. Die Größen der Zahnriemenscheiben 22, 24 sind so bemessen, daß sich die Papierauszugswalze 10 mit höherer Umfangsgeschwindigkeit dreht als die Papiereinzugswalze 8. Das System aus Zahnriemenscheiben 22, 24 und Zahnriemen 23 kann auch nur durch Zahnräder, wie Zwischenritzel, oder äquivalente Kraftübertragungsmittel ersetzt sein.A toothed belt pulley 22 is attached to one end of the metal shaft 11 of the paper feed roller 8. A toothed belt 23 connects the toothed belt pulley 22 with a further toothed belt pulley 24 at one end of the metal shaft 13 of the paper pull-out roller 10. Thus, the paper feed roller 8 and the paper pull-out roller 10 are non-positively connected to one another, and at the same time the toothed belt pulleys 22, 24 and the toothed belt 23 are independent of the paper pressure roller 9. The sizes of the toothed belt pulleys 22, 24 are such that the paper pull-out roller 10 rotates at a higher peripheral speed than the paper feed roller 8. The system of toothed belt pulleys 22, 24 and toothed belt 23 can also be replaced only by toothed wheels, such as intermediate pinions, or equivalent power transmission means.

Mittels einer gestrichelten Linie 25 und einem Pfeil 26 sind die Lage und die Bewegungsrichtung des durch die Transportvorrichtung an die Druckeinrichtung 6 herangeführten Endlospapiers dargestellt. Das die Druckwalze 7 der Druckeinrichtung 6 wieder verlassende Endlospapier wird in entsprechender Weise durch die gestrichelte Linie 27 und den Pfeil 28 erläutert.The position and the direction of movement of the continuous paper brought up to the printing device 6 by the transport device are represented by a dashed line 25 and an arrow 26. The continuous paper leaving the printing roller 7 of the printing device 6 is explained in a corresponding manner by the dashed line 27 and the arrow 28.

Fig. 2 zeigt eine Ansicht der einen Enden der Papiereinzugswalze 8 und der Papierauszugswalze 10 mit ihrer Lagerung in einer Lagerplatte 19 (teilweise aufgebrochen) und mit den Kraftübertragungsmitteln in Form der Zahnriemenscheiben 22, 24 und des Zahnriemens 23. Zur besseren Übersichtlichkeit ist in der Fig. 2 die Papieranpreßwalze 9 weggelassen. Die Papiereinzugswalze 8 ist mit ihrer Lagerung in der Ansicht, die Papierauszugswalze 10 ist mit ihrer Lagerung im Schnitt dargestellt. Es ist erkennbar, daß beide Walzen 8, 10 mit ihren Metallwellen 11, 13 in jeweils einer Kunststoffhülse 20 gelagert sind. Mittels axial befestigter Schrauben 29 ist auf der Metallwelle 11 der Papiereinzugswalze 8 und auf der Metallwelle 13 der Papierauszugswalze 10 jeweils eine Zahnriemenscheibe 22, 24 befestigt. Über die Zahnriemenscheiben 22, 24 läuft der Zahnriemen 23.FIG. 2 shows a view of one end of the paper feed roller 8 and the paper extraction roller 10 with their storage in a bearing plate 19 (partially broken open) and with the force transmission means in the form of the toothed belt pulleys 22, 24 and the toothed belt 23. For better clarity, FIG 2 the paper pressure roller 9 omitted. The paper feed roller 8 is shown with its storage in the view, the paper extraction roller 10 is shown with its storage in section. It can be seen that both rollers 8, 10 with their metal shafts 11, 13 are each mounted in a plastic sleeve 20. A toothed belt pulley 22, 24 is fastened on the metal shaft 11 of the paper feed roller 8 and on the metal shaft 13 of the paper extraction roller 10 by means of axially fastened screws 29. The toothed belt 23 runs over the toothed belt pulleys 22, 24.

Fig. 3 zeigt einen Einblick in das Schallschutzgehäuse 1 mit geöffnetem Deckel 3 in Richtung auf die Rückwand 2 des Schallschutzgehäuses 1. Ein aus der Druckeinrichtung 6 austretendes Endlospapier 27 wird durch den Walzenspalt zwischen der Papieranpreßwalze 9 und der Papierauszugswalze 10 aus dem Schallschutzgehäuse 1 hinausgeführt.Fig. 3 shows an insight into the soundproofing housing 1 with the cover 3 open in the direction of the rear wall 2 of the soundproofing housing 1. A continuous paper 27 emerging from the printing device 6 is guided out of the soundproofing housing 1 through the nip between the paper pressure roller 9 and the paper extraction roller 10.

Fig. 4 stellt eine Ansicht der Transportvorrichtung an der Außenseite der Rückwand 2 des Schallschutzgehäuses 1 dar. Die Walzen 8, 9, 10 sind in den beiden Lagerplatten 19 gelagert, welche jeweils mit zwei Schrauben 30 an der Rückwand 2 des Schallschutzgehäuses 1 befestigt sind.Fig. 4 shows a view of the transport device on the outside of the rear wall 2 of the soundproof housing 1. The rollers 8, 9, 10 are mounted in the two bearing plates 19, which are each fastened to the rear wall 2 of the soundproof housing 1 with two screws 30.

Fig. 5 zeigt einen Teil der Papiertransportvorrichtung an der Außenseite des Schallschutzgehäuses 1, wobei die Papieranpreßwalze 9 zur besseren Erkennbarkeit der Ausnehmung 21 in der Lagerplatte 19 aus dieser ein Stück herausgezogen ist. In der zur Innenseite des Schallschutzgehäuses 1 hin abgerundeten Ausnehmung 21 wird das Lager der Papieranpreßwalze 9 in deren Betriebsstellung durch die (nicht erkennbare) Schraubenfeder 17 gehalten.Fig. 5 shows a part of the paper transport device on the outside of the soundproof housing 1, wherein the paper pressure roller 9 is pulled out of the bearing plate 19 a little to make it easier to see. In the recess 21, which is rounded toward the inside of the soundproofing housing 1, the bearing of the paper pressure roller 9 is held in its operating position by the (not recognizable) coil spring 17.

Für den Betrieb der Papiertransportvorrichtung wird das Endlospapier zwischen der Papiereinzugswalze 8 und der Papieranpreßwalze 9 hindurch, anschließend um die Druckwalze 7 der Druckeinrichtung 6 herum und schließlich zwischen der Papieranpreßwalze 9 und der Papierauszugswalze 10 wieder herausgeführt. Zur Erleichterung des Einfädelns des Papiers kann die Papieranpreßwalze 9 in ihrer Lage zwischen der Papiereinzugswalze 8 und der Papierauszugswalze 10 angehoben oder aus dieser Position vollkommen entfernt und dann wieder eingesetzt werden. Bei Inbetriebnahme der Druckeinrichtung 6 dreht sich die Druckwalze 7 in der Richtung des Pfeils 31 in Fig. 1 und zieht das Endlospapier entsprechend der gestrichelten Linie 25 in die Druckeinrichtung 6. Mittels der Schraubenfedern 17 wird die Papieranpreßwalze 9 ausreichend fest gegen die Papiereinzugswalze 8 gedrückt. Dadurch wird ein Schlupf zwischen dem Endlospapier und diesen beiden Walzen 8, 9 weitgehend verhindert.For the operation of the paper transport device, the continuous paper is passed between the paper feed roller 8 and the paper pressure roller 9, then around the pressure roller 7 of the printing device 6 and finally between the paper pressure roller 9 and the paper extraction roller 10. In order to facilitate the threading of the paper, the paper pressure roller 9 can be raised in its position between the paper feed roller 8 and the paper extraction roller 10 or removed completely from this position and then inserted again. When the printing device 6 is started up, the printing roller 7 rotates in the direction of the arrow 31 in FIG. 1 and pulls the continuous paper into the printing device 6 in accordance with the dashed line 25. The paper pressure roller 9 is pressed sufficiently firmly against the paper feed roller 8 by means of the coil springs 17. This largely prevents slippage between the continuous paper and these two rollers 8, 9.

Das Einziehen des Papiers in die Druckeinrichtung 6 bewirkt daher eine Rotation der Papiereinzugswalze 8 und der Papieranpreßwalze 9. Durch die kraftschlüssige Verbindung zwischen der Papiereinzugswalze 8 und der Papierauszugswalze 10 wird die letztere zwangsläufig in Drehung versetzt. Diese Drehung wird auch auf die Papieranpreßwalze 9 übertragen, die mittels der Schraubenfedern 17 auch an die Papierauszugswalze 10 angedrückt wird. Das durch die gestrichelte Linie 27 dargestellte, aus der Druckeinrichtung 6 abgeführte Endlospapier wird in dem Walzenspalt zwischen der Papieranpreßwalze 9 und der Papierauszugswalze 10 erfaßt und von der Druckeinrichtung 6 weggezogen. Auf diese Weise kann sich in dem Bereich A des Endlospapiers zwischen der Druckwalze 7 und der Papierauszugswalze 10 kein Papierstau ausbilden. Der Zug auf das Endlospapier in dem Bereich A ist ständig gegeben, da die Kraftübertragungsmittel zwischen der Papiereinzugswalze 8 und der Papierauszugswalze 10 derart bemessen sind, daß die Papierauszugswalze 10 mit einer höheren Umfangsgeschwindigkeit rotiert als die Papiereinzugswalze 8.The drawing of the paper into the printing device 6 therefore causes the paper feed roller 8 and the paper pressure roller 9 to rotate. The force-locking connection between the paper feed roller 8 and the paper extraction roller 10 inevitably sets the latter in rotation. This rotation is also transmitted to the paper pressure roller 9, which is also pressed onto the paper extraction roller 10 by means of the coil springs 17. The continuous paper shown by the dashed line 27 and discharged from the printing device 6 is gripped in the nip between the paper pressure roller 9 and the paper extraction roller 10 and pulled away from the printing device 6. In this way, no paper jam can form in the area A of the continuous paper between the printing roller 7 and the paper extraction roller 10. The tension on the continuous paper in the area A is constant, since the force transmission means between the paper feed roller 8 and the paper feed roller 10 are dimensioned such that the paper feed roller 10 rotates at a higher peripheral speed than the paper feed roller 8.

Der Antrieb für die Papiertransportvorrichtung geschieht also derart, daß das von der Druckwalze 7 der Druckeinrichtung 6 eingezogene Endlospapier die Papiereinzugswalze 8 und die Papieranpreßwalze 9 weitgehend schlupffrei mitnimmt. Ein eigener Motor für die Papiertransportvorrichtung ist damit überflüssig. Die Walzen 8, 9, 10 sind derart angeordnet, daß sich zwangsläufig zwischen der Papiereinzugswalze 8 und der Papieranpreßwalze 9 eine Bewegungsrichtung des Endlospapiers in Richtung auf die Druckeinrichtung 6 sowie zwischen der Papieranpreßwalze 9 und der Papierauszugswalze 10 eine Bewegungsrichtung des Papiers von der Druckeinrichtung 6 weg ergibt. Mit Hilfe der Kraftübertragungsmittel zwischen der Papiereinzugswalze 8 und der Papierauszugswalze 10 läßt sich die Papiertransportgeschwindigkeit so einstellen, daß das Endlospapier mit einer höheren Geschwindigkeit von der Druckeinrichtung 6 weggezogen als es von dieser selbst eingezogen wird. Ein sicherer Papiertransport ohne Verklemmen und Stauen des Endlospapiers ist damit gewährleistet.The drive for the paper transport device thus occurs in such a way that the continuous paper drawn in by the pressure roller 7 of the printing device 6 takes the paper feed roller 8 and the paper pressure roller 9 largely without slippage. A separate motor for the paper transport device is therefore unnecessary. The rollers 8, 9, 10 are arranged such that a direction of movement of the continuous paper inevitably between the paper feed roller 8 and the paper pressure roller 9 in the direction of the printing device 6 and between the paper pressure roller 9 and the paper extraction roller 10 a direction of movement of the paper away from the printing device 6 results. With the help of the power transmission means between the paper feed roller 8 and the paper feed roller 10, the paper transport speed can be adjusted so that the continuous paper is pulled away from the printing device 6 at a higher speed than it is from this itself is drawn in. This ensures safe paper transport without jamming and jamming the continuous paper.

Claims (5)

  1. Paper transporting device having rollers for the supply and removal of endless paper for printing installations, in which a paper feed roller (8), a paper extraction roller (10) and a paper pressure roller (9) are rotatably mounted in an axis-parallel arrangement, the paper feed roller (8) and the paper extraction roller (10) are distanced from each other and both interact simultaneously with the paper pressure roller (9), and the paper extraction roller (10) can be driven by power transmission means from the paper feed roller (8), characterised in that power transmission means (22, 23, 24) are provided, which are independent from the paper pressure roller (9) and non-positively connect one end of the shaft (11) of the paper feed roller (8) to one end of the shaft (13) of the paper extraction roller (10) and are dimensioned such that the paper extraction roller (10) rotates at a higher peripheral velocity than the paper feed roller (8).
  2. Paper transporting device according to Claim 1, characterised in that the clear distance between the paper feed roller (8) and the paper extraction roller (10) is of smaller dimensions than the diameter of the paper pressure roller (9).
  3. Paper transporting device according to Claim 1 or 2, characterised in that the paper pressure roller (9) can be adjustably forced by means of springs (17) against both the paper feed roller (8) and the paper extraction roller (10).
  4. Paper transporting device according to one of Claims 1 to 3, characterised in that cogwheels or toothed belt pulleys (22, 24) with a toothed belt (23) are provided as power transmission means between the paper feed roller (8) and the paper extraction roller (10).
  5. Paper transporting device according to one of Claims 1 to 4, characterised in that the paper feed roller (8), the paper extraction roller (10) and the paper pressure roller (9) exhibit in each case a steel shaft (11, 13, 12) and a foam roller surface (14, 15, 16).
EP87102805A 1986-02-28 1987-02-27 Paper-feeding device for printers Expired - Lifetime EP0234589B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863606670 DE3606670A1 (en) 1986-02-28 1986-02-28 PAPER TRANSPORT DEVICE FOR PRINTING DEVICES
DE3606670 1986-02-28

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EP0234589A2 EP0234589A2 (en) 1987-09-02
EP0234589A3 EP0234589A3 (en) 1989-03-01
EP0234589B1 true EP0234589B1 (en) 1992-06-10

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EP87102805A Expired - Lifetime EP0234589B1 (en) 1986-02-28 1987-02-27 Paper-feeding device for printers

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DE (1) DE3606670A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO874100L (en) * 1987-09-30 1989-03-31 Jacobsen Loyd DEVICE FOR AUTOMATIC OUTPUT OF PAPER THROUGH A PRINTER COVER.
DE3919830C2 (en) * 1988-06-22 2003-10-23 Monarch Marking Systems Inc Hand labelers and labeling methods
DE19749603C2 (en) * 1997-11-10 1999-11-25 Oce Printing Systems Gmbh Device for the tractorless transport of a tape-shaped recording medium in an electrographic printer or copier
DE102008025994B4 (en) * 2008-05-29 2011-06-09 Windmöller & Hölscher Kg press

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1095063A (en) * 1912-05-13 1914-04-28 Vicente Font Y Amador Type-writer.
DE469383C (en) * 1926-02-27 1928-12-14 Otto Post Winding and tensioning device for paper webs on typewriters and calculating machines
FR907783A (en) * 1944-05-09 1946-03-21 Roll-spool
JPS46282Y1 (en) * 1967-06-12 1971-01-07
IT1014154B (en) * 1974-05-10 1977-04-20 Olivetti & Co Spa DEVICE FOR MOVING A PRINT HEAD BY MEANS OF AN ELECTRIC MOTOR WITH CURRENT ACCOUNTS NUA
US4197024A (en) * 1977-11-30 1980-04-08 Teletype Corporation Acoustical damping for printer
DE2818316C3 (en) * 1978-04-26 1983-05-11 Zeno 8254 Isen Mittermaier Device for winding recording tapes of calculating machines or the like.
JPS57141786A (en) * 1981-02-27 1982-09-02 Nippon Abionikusu Kk Card feeding mechanism for card information reader
JPS6038189A (en) * 1983-08-11 1985-02-27 Hitachi Ltd Noise preventing structure of printer

Also Published As

Publication number Publication date
DE3606670A1 (en) 1987-09-17
EP0234589A3 (en) 1989-03-01
US4836701A (en) 1989-06-06
EP0234589A2 (en) 1987-09-02
DE3606670C2 (en) 1987-12-17

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