EP0243601A1 - Paper feeding device for single sheets and continuous webs in printing devices - Google Patents

Paper feeding device for single sheets and continuous webs in printing devices Download PDF

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Publication number
EP0243601A1
EP0243601A1 EP19870102546 EP87102546A EP0243601A1 EP 0243601 A1 EP0243601 A1 EP 0243601A1 EP 19870102546 EP19870102546 EP 19870102546 EP 87102546 A EP87102546 A EP 87102546A EP 0243601 A1 EP0243601 A1 EP 0243601A1
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EP
European Patent Office
Prior art keywords
paper
continuous paper
single sheets
transport
continuous
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.)
Withdrawn
Application number
EP19870102546
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German (de)
French (fr)
Inventor
Hans Ing.-Grad. Taubenberger
Richard Ing.-Grad. Thurner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0243601A1 publication Critical patent/EP0243601A1/en
Withdrawn legal-status Critical Current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
    • B41J11/48—Apparatus for condensed record, tally strip, or like work using two or more papers, or sets of papers, e.g. devices for switching over from handling of copy material in sheet form to handling of copy material in continuous form and vice versa or point-of-sale printers comprising means for printing on continuous copy material, e.g. journal for tills, and on single sheets, e.g. cheques or receipts
    • 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
    • B41J11/28—Pin wheels
    • 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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • 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
    • B41J15/046—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles for the guidance of continuous copy material, e.g. for preventing skewed conveyance of the continuous copy material

Definitions

  • the invention relates to a paper transport device for printing devices according to the preamble of patent claim 1.
  • Such a paper transport device is known from JP-OS 58-142 877.
  • the continuous paper In the operation with continuous paper, the continuous paper is guided over pin wheels and pulled by the platen roller in frictional engagement.
  • An electro-optical positioning device assigned to the pin wheels emits positioning signals when the continuous paper is moved.
  • the positioning signals for a specific paper feed are compared with the control steps of the stepper motor driving the paper roll and the feed is corrected in the event of deviations.
  • JP-OS 60-21 275 a paper transport device for continuous paper and single sheets can be found, in which an electro-optical scanning device is arranged in the area of the platen roller. With the paper feed drove the paper over the scanner triggers an electromagnet, which presses the paper against the platen roller.
  • the object of the invention is to provide a paper transport device of the type mentioned at the outset which makes it possible to transport both single sheets and continuous paper reliably and in a positionally accurate manner and which enables the continuous paper to be inserted in a simple manner.
  • an electro-optical scanning device which compares the feed of the incoming paper, be it continuous paper or single sheets with that of the drive element (stepper motor) of the platen roller in front of the removable setpoint, and controls or corrects the feed as a function thereof.
  • the pin wheels are equipped with a locking mechanism that emphasizes the direction of rotation couples. This enables the continuous paper to be moved in the transport direction, but the paper is strongly inhibited by the locking mechanism in the opposite direction. However, this resistance can be overcome with more force.
  • a pivotable paper guide flap is provided, the surface of which is designed as a guide surface for the continuous paper and which has on its inner surface a guide attachment for the continuous paper, which forms a paper feed channel for the pin wheels together with the printer frame, which is designed such that the continuous paper with its edge perforations has an intended wrap angle around the pin wheels.
  • the paper transport device shown schematically in FIG. 1 for a typewriter or office machine working according to the principle of the ink printer contains a motor-driven platen roller 1 with an associated stepping motor 2, which has a recording medium made from single sheets 3 or continuous perforated paper 4 in a paper guide channel 6 formed by paper pressure rollers 5 moved along by an ink writing head 7.
  • the ink writing head 7 is arranged in a manner not shown here on a printer carriage and is moved line by line in a known manner along the recording medium during the writing operation.
  • the continuous paper and the individual sheets are driven by frictional engagement between the paper pressure rollers 5 and the motor-driven platen roller 1, the paper pressure rollers themselves also being able to be motor-driven.
  • the printing device shown is suitable for operation with single sheets 3 as well as for operation with continuous paper 4.
  • a paper guide channel 8 for continuous paper and another paper guide channel 9 for single sheets lead into the paper guide channel 6 between the platen roller and paper pressure rollers 5.
  • Upstream in the transport direction of the paper of the platen roller 1 are two pen wheels 10 which are rigidly connected to one another via a square axis 11.
  • the pin wheels engage with their pins in the side perforation of the continuous paper.
  • On one side of these pin wheels is connected to the square axis 11 which is shown in FIG. 2 posed locking direction arranged arranged with a ratchet wheel 12 into which a pawl 13 engages via a locking projection 13/1.
  • the pin wheels 10 are mounted with their square axis in the frame 14 of the printer.
  • flanks 27 of the toothing 26 of the ratchet wheel 12 and the locking projection 13/1 are so matched in terms of their pitch that a strong escapement is generated in the direction of rotation 28.
  • this inhibition resistance can be overcome from a certain force, and the pawl 13 swings out again.
  • the printer itself is covered by a paper discharge flap 15, the outer surface (surface) 16 of which serves as a guide surface for the continuous paper and which has on its inner surface guide lugs 17 which cooperate with the printer frame 14, so that a paper guide channel when folded (FIG. 1) 18 is formed for the continuous paper.
  • This paper guide channel 18 runs in such a way that the continuous paper with its edge perforations is guided over the pin wheels 10 so that a certain number of pins, e.g. three engage in the peripheral perforations.
  • These guide elements 19 can also be formed and attached to the paper discharge flaps.
  • an electro-optical scanning device 20 Arranged in the area of the platen roller 1 is an electro-optical scanning device 20 which interacts with the actual control arrangement 21 of the printer, which is implemented in a known manner, namely via a comparison device 22.
  • the paper discharge flap 15 corresponding to the ge is used to insert the continuous paper dashed representation opened.
  • a projection 23 (FIG. 2) arranged on the paper guide flap 15 releases the pawl 13, which pivots about an axis of rotation 24 under the action of a spring 25 (arrow direction) and with its latching projection 13/1 into the toothing 26 of the ratchet wheel 12 engages.
  • the pin wheels 10 can also be rotated backwards after overcoming the inhibition resistance, which enables the paper to be inserted and pretensioned precisely.
  • the inhibition resistance must be chosen so large by appropriate dimensioning of the spring 25 in connection with the flanks that even heavier paper from e.g. 90g / cm2 is held by the locking mechanism without it sliding out of the paper guide due to its own weight.
  • the optoelectronic device detects the holes in the edge perforation of the continuous paper and compares the feed measured in this way with the nominal feed in the form of electrical signals which are taken from the stepper motor 2. Depending on the comparison process, the control arrangement 21 and thus the feed and the position of the continuous paper is then corrected via the comparison device 22.
  • the paper discharge flap 15 is first opened and the locking mechanism is thus engaged. Since the locking mechanism is designed as a locking mechanism that emphasizes the direction of rotation, the paper can be pulled backwards without having to pivot the guide elements after overcoming the locking inhibition force. This is possible either by pulling the continuous paper 4, or by turning the handwheel. After the inlet channel has been released, the paper discharge flap 15 is closed again and the individual sheets 3 can be fed individually to the paper feed channel 6 of the platen roller via the paper guide channel 9 for single sheets or with the aid of an automatic feeder.

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  • Handling Of Sheets (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

The paper transport mechanism for ink printing appliances for the alternative transport of single sheets (3) and continuous webs (4) provided with edge perforations features a motor-driven platen (1) and an in-feed channel (8) for continuous webs and an in-feed channel (9) for single sheets. The transport of the single sheets as well as of the continuous webs results from frictional engagement over the platen while for the guidance of the continuous webs in the transport direction before the paper roller, pin wheels (10) connected to one another by a shaft (11) are provided as guidance elements which penetrate into the edge perforations of the continuous webs. The positional sensing of the single sheets and the continuous webs results from an electro-optical scanning device (20). A locking mechanism (26, 27) oriented in the direction of rotation is connected to the pin wheels and is released when the printer is in the closed condition. <IMAGE>

Description

Die Erfindung betrifft eine Papiertransportvorrichtung für Druckeinrichtungen gemäß dem Oberbegriff des Patent­anspruches 1.The invention relates to a paper transport device for printing devices according to the preamble of patent claim 1.

Eine derartige Papiertransportvorrichtung ist aus der JP-OS 58-142 877 bekannt. Dabei wird im Betrieb mit End­lospapier das Endlospapier über Stiftenräder geführt und im Reibschluß von der Schreibwalze gezogen. Eine den Stiftenrädern zugeordnete elektrooptische Positionierein­richtung gibt bei der Bewegung des Endlospapieres Positio­niersignale ab. Die Positioniersignale für einen bestimm­ten Papiervorschub werden mit den Ansteuerschritten des die Papierwalze antreibenden Schrittmotores verglichen und bei Abweichungen der Vorschub korrigiert.Such a paper transport device is known from JP-OS 58-142 877. In the operation with continuous paper, the continuous paper is guided over pin wheels and pulled by the platen roller in frictional engagement. An electro-optical positioning device assigned to the pin wheels emits positioning signals when the continuous paper is moved. The positioning signals for a specific paper feed are compared with the control steps of the stepper motor driving the paper roll and the feed is corrected in the event of deviations.

Einzelblätter werden von dieser Positioniereinrichtung nicht erfaßt. Damit müssen Ungenauigkeiten in Kauf genommen werden, weil die Positionierung und der Vorschub in der Betriebsart Einzelblätter allein über die Papier­walze erfolgt, ohne daß die Position des Papieres beim Einlegen erfaßt wird. Weiterhin besteht beim Einlegen des Endlospapieres die Gefahr, daß infolge des Eigengewichtes des Endlospapierstapels das Endlospapier aus der Papier­führung gleitet.Single sheets are not detected by this positioning device. This means that inaccuracies have to be accepted because the positioning and feeding in single sheet mode is carried out solely by the paper roller, without the position of the paper being detected when it is inserted. Furthermore, when loading the continuous paper, there is a risk that the continuous paper will slide out of the paper guide due to the weight of the continuous paper stack.

Es ist weiterhin aus der JP-OS 60-21 275 eine Papiertrans­portvorrichtung für Endlospapier und Einzelblätter entnehm­bar, bei der im Bereich der Schreibwalze eine elektroopti­sche Abtasteinrichtung angeordnet ist. Bei der Papierzu­ fuhr löst das Papier über die Abtasteinrichtung einen Elektromagneten aus, der über Papierandruckrollen das Papier gegen die Schreibwalze preßt.From JP-OS 60-21 275 a paper transport device for continuous paper and single sheets can be found, in which an electro-optical scanning device is arranged in the area of the platen roller. With the paper feed drove the paper over the scanner triggers an electromagnet, which presses the paper against the platen roller.

Aufgabe der Erfindung ist es, eine Papiertransportvorrich­tung der eingangs genannten Art bereitzustellen, die es ermöglicht, sowohl Einzelblätter als auch Endlospapier be­triebssicher und positionsgenau zu transportieren und die in einfacher Weise ein Einlegen des Endlospapieres ermög­licht.The object of the invention is to provide a paper transport device of the type mentioned at the outset which makes it possible to transport both single sheets and continuous paper reliably and in a positionally accurate manner and which enables the continuous paper to be inserted in a simple manner.

Diese Aufgabe wird bei einer Papiertransportvorrichtung der eingangs genannten Art gemäß dem kennzeichnenden Teil des ersten Patentanspruches gelöst.This object is achieved in a paper transport device of the type mentioned at the outset in accordance with the characterizing part of the first claim.

Vorteilhafte Ausführungsformen der Erfindung sind in den Unteransprüchen gekennzeichnet.Advantageous embodiments of the invention are characterized in the subclaims.

Dadurch daß sowohl das Endlospapier als auch die Einzel­blätter allein durch den Reibschluß der Scheibwalze trans­portiert und positioniert werden, ergibt sich ein beson­ders einfacher Aufbau der Papiertransportvorrichtung mit nur einem einzigen Antrieb. Um eine derartige Positio­nierung sicher bewerkstelligen zu können sind in Trans­portrichtung der Papierwalze vorgelagert miteinander starr verbundene Stiftenräder vorgesehen, über die das Endlospa­pier geführt ist. Die Stiftenräder greifen dabei in die Randlochungen des Endlospapieres ein und erfüllen eine Leitfunktion für das Endlospapier. Im Bereich der Schreib­walze befindet sich eine elektrooptische Abtasteinrichtung die den Vorschub des einlaufenden Papieres sei es Endlos­papier oder Einzelblätter mit den von dem Antriebselement (Schrittmotor) der Schreibwalze vor dem abnehmbaren Soll­wert vergleicht und in Abhängigkeit davon den Vorschub steuert bzw. korrigiert.The fact that both the continuous paper and the individual sheets are transported and positioned solely by the frictional engagement of the disk roller results in a particularly simple construction of the paper transport device with only a single drive. In order to be able to safely accomplish such positioning, pin wheels which are rigidly connected to one another in front of one another in the transport direction of the paper roll and over which the continuous paper is guided are provided. The pinwheels engage in the perforations on the edge of the continuous paper and fulfill a guiding function for the continuous paper. In the area of the platen roller there is an electro-optical scanning device which compares the feed of the incoming paper, be it continuous paper or single sheets with that of the drive element (stepper motor) of the platen roller in front of the removable setpoint, and controls or corrects the feed as a function thereof.

Um das Einlegen des Endlospapieres zu erleichtern sind die Stiftenräder mit einem drehrichtungsbetonten Gesperre ge­ koppelt. Damit kann das Endlospapier in Transportrichtung bewegt werden, entgegen der Transportrichtung jedoch wird das Papier durch das Gesperre stark gehemmt. Mit stärkerer Kraft kann jedoch dieser Widerstand überwunden werden.In order to facilitate the loading of the continuous paper, the pin wheels are equipped with a locking mechanism that emphasizes the direction of rotation couples. This enables the continuous paper to be moved in the transport direction, but the paper is strongly inhibited by the locking mechanism in the opposite direction. However, this resistance can be overcome with more force.

Damit wird das Papier beim Einlegen gehalten und kann nicht wieder in Folge des Eigengewichtes des Papierzuführ­stapels aus der Papierführung gleiten. Trotzdem aber ist ein genaues Einlegen des Endlospapieres und Justierung in beiden Drehrichtungen z.B. über ein an der Drehachse be­festigtes Handrad möglich.This holds the paper when it is loaded and cannot slide out of the paper guide again due to the weight of the paper feed stack. Nevertheless, an exact loading of the continuous paper and adjustment in both directions of rotation is e.g. possible via a handwheel attached to the axis of rotation.

Bei einer vorteilhaften Ausführungsform der Erfindung ist eine abschwenkbare Papierleitklappe vorgesehen, deren Oberfläche als Führungsfläche für das Endlospapier ausge­bildet ist und die an ihrer Innenfläche einen Führungsan­satz für das Endlospapier aufweist, der zusammem mit dem Druckergestell einen Papierzuführungskanal für die Stif­tenräder bildet der derart ausgebildet ist, daß das End­lospapier mit seinen Randlochungen einen vorgesehenen Um­schlingungswinkel um die Stiftenräder aufweist. Im ein­geschwenkten Zustand der Papierableitklappe befinden sich dadurch immer mindestens drei Stiftenräder mit den Lochun­gen des Endlospapieres im Eingriff.In an advantageous embodiment of the invention, a pivotable paper guide flap is provided, the surface of which is designed as a guide surface for the continuous paper and which has on its inner surface a guide attachment for the continuous paper, which forms a paper feed channel for the pin wheels together with the printer frame, which is designed such that the continuous paper with its edge perforations has an intended wrap angle around the pin wheels. When the paper discharge flap is swiveled in, there are always at least three pinwheels in engagement with the holes in the continuous paper.

An der Papierableitklappe kann ein Ansatz ausgebildet sein, der mit der Klinke des Gesperres der Stiftenräder zusammenarbeitet, so daß sich im abgeschwenkten Zustand der Papierableitklappe das Gesperre im Eingriff befindet womit ein Einlegen des Endlospapieres erleichtert wird. Im eingeschwenkten Zustand der Papierableitklappe wird über den Ansatz durch Ausheben der Klinke das Gesperre gelöst.On the paper flap an approach can be formed, which cooperates with the pawl of the ratchet of the pin wheels, so that the ratchet is in engagement in the pivoted-off state of the paper flap, making it easier to insert the continuous paper. In the swung-in state of the paper discharge flap, the locking mechanism is released by lifting the latch.

Eine Ausführungsform der Erfindung ist in den Zeichnungen dargestellt und wird im Folgenden beispielsweise näher be­schrieben. Es zeigen

  • Fig. 1 eine schematische Schnittdarstellung der Papier­transportvorrichtung
  • Fig. 2 eine schematische Darstellung der Funktion des drehrichtungsabhängigen Gesperres.
An embodiment of the invention is shown in the drawings and is described in more detail below, for example. Show it
  • Fig. 1 is a schematic sectional view of the paper transport device
  • Fig. 2 is a schematic representation of the function of the direction-dependent locking mechanism.

Die in der Fig. 1 schematisch dargestellte Papiertrans­portvorrichtung für eine nach dem Prinzip des Tinten­druckers arbeitende Schreib- oder Büromaschine enthält eine motorisch angetriebene Schreibwalze 1 mit zugeord­netem Schrittmotor 2, die einen Aufzeichnungsträger aus Einzelblättern 3 oder randgelochtem Endlospapier 4 in einem durch Papierandruckrollen 5 gebildeten Papierfüh­rungskanal 6 entlang von einem Tintenschreibkopf 7 bewegt. Der Tintenschreibkopf 7 ist in hier nicht dargestellter Weise auf einem Druckerwagen angeordnet und wird im Schreibbetrieb in bekannter Weise zeilenweise entlang von dem Aufzeichnungsträger bewegt. Der Vortrieb des Endlos­papiers und der Einzelblätter erfolgt durch Reibschluß zwischen den Papierandruckrollen 5 und der motorisch an­getriebenen Schreibwalze 1, wobei die Papierandruckrollen selbst auch motorisch angetrieben sein können.The paper transport device shown schematically in FIG. 1 for a typewriter or office machine working according to the principle of the ink printer contains a motor-driven platen roller 1 with an associated stepping motor 2, which has a recording medium made from single sheets 3 or continuous perforated paper 4 in a paper guide channel 6 formed by paper pressure rollers 5 moved along by an ink writing head 7. The ink writing head 7 is arranged in a manner not shown here on a printer carriage and is moved line by line in a known manner along the recording medium during the writing operation. The continuous paper and the individual sheets are driven by frictional engagement between the paper pressure rollers 5 and the motor-driven platen roller 1, the paper pressure rollers themselves also being able to be motor-driven.

Die dargestellte Druckeinrichtung ist sowohl für den Be­trieb mit Einzelblättern 3, als auch für den Betrieb mit Endlospapier 4 geeignet. Zu diesem Zwecke münden in den Papierführungskanal 6 zwischen Schreibwalze und Papieran­druckrollen 5 ein von der Schreibwalze tangential weg­fluchtender Papierführungskanal 8 für Endlospapier und ein weiterer Papierführungskanal 9 für Einzelblätter.The printing device shown is suitable for operation with single sheets 3 as well as for operation with continuous paper 4. For this purpose, a paper guide channel 8 for continuous paper and another paper guide channel 9 for single sheets lead into the paper guide channel 6 between the platen roller and paper pressure rollers 5.

In Transportrichtung des Papieres der Schreibwalze 1 vor­gelagert sind zwei Stiftenräder 10 die über eine Vierkant­achse 11 starr miteinander verbunden sind. Die Stiftenrä­der greifen mit ihren Stiften in die Seitenperforation des Endlospapieres ein. An einer Seite dieser Stiftenräder ist mit der Vierkantachse 11 verbunden das in der Fig. 2 dar­ gestellte drehrichtungsbetonte Gesperre angeordnet mit einem Klinkenrad 12 in das eine Klinke 13 über einen Rast­ansatz 13/1 greift. Die Stiftenräder 10 sind mit ihrer Vierkantachse im Gestell 14 des Druckers gelagert.Upstream in the transport direction of the paper of the platen roller 1 are two pen wheels 10 which are rigidly connected to one another via a square axis 11. The pin wheels engage with their pins in the side perforation of the continuous paper. On one side of these pin wheels is connected to the square axis 11 which is shown in FIG. 2 posed locking direction arranged arranged with a ratchet wheel 12 into which a pawl 13 engages via a locking projection 13/1. The pin wheels 10 are mounted with their square axis in the frame 14 of the printer.

Die Flanken 27 der Verzahnung 26 des Klinkenrades 12 und des Rastansatzes 13/1 sind hinsichtlich ihrer Steigung so aufeinander abgestimmt, daß in Drehrichtung 28 eine starke Hemmung erzeugt wird. Dieser Hemmungswiderstand kann ab einer bestimmten Kraft jedoch überwunden werden, und die Klinke 13 schwenkt wieder aus.The flanks 27 of the toothing 26 of the ratchet wheel 12 and the locking projection 13/1 are so matched in terms of their pitch that a strong escapement is generated in the direction of rotation 28. However, this inhibition resistance can be overcome from a certain force, and the pawl 13 swings out again.

Der Drucker selbst ist abgedeckt durch eine Papierableit­klappe 15, deren Außenfläche (Oberfläche) 16 als Füh­rungsfläche für das Endlospapier dient und die an ihrer Innenfläche Führungsansätze 17 aufweist, die mit dem Druckergestell 14 zusammenwirken, so daß im eingeklappten Zustand (Fig. 1) ein Papierführungskanal 18 für das End­lospapier gebildet wird. Dieser Papierführungskanal 18 verläuft derart, daß das Endlospapier mit seinen Rand­lochungen so über die Stiftenräder 10 geführt wird, daß immer eine bestimmte Anzahl von Stifte z.B. drei in die Randlochungen eingreifen. Zur Sicherung des Endlospapieres befindet sich im Bereich der Stifte noch ein abschwenkba­res Leitelement 19 und zwar je eines für jedes Stiftenrad. Diese Leitelemente 19 können auch an den Papierableit­klappen ausgebildet und befestigt sein.The printer itself is covered by a paper discharge flap 15, the outer surface (surface) 16 of which serves as a guide surface for the continuous paper and which has on its inner surface guide lugs 17 which cooperate with the printer frame 14, so that a paper guide channel when folded (FIG. 1) 18 is formed for the continuous paper. This paper guide channel 18 runs in such a way that the continuous paper with its edge perforations is guided over the pin wheels 10 so that a certain number of pins, e.g. three engage in the peripheral perforations. To secure the continuous paper, there is a swiveling guide element 19 in the area of the pins, one for each pin wheel. These guide elements 19 can also be formed and attached to the paper discharge flaps.

Im Bereich der Schreibwalze 1 ist eine elektrooptische Abtasteinrichtung 20 angeordnet, die mit der eigentlichen in bekannter Weise ausgeführten Ansteueranordnung 21 des Druckers zusammenwirkt und zwar über eine Vergleichsein­richtung 22.Arranged in the area of the platen roller 1 is an electro-optical scanning device 20 which interacts with the actual control arrangement 21 of the printer, which is implemented in a known manner, namely via a comparison device 22.

Soll mit der dargestellten Druckvorrichtung Endlospapier beschrieben werden, so wird zum Einlegen des Endlos­papieres die Papierableitklappe 15 entsprechend der ge­ strichelten Darstellung aufgeklappt. Durch dieses Auf­klappen gibt ein an der Papierleitklappe 15 angeordneter Ansatz 23 (Fig. 2) die Klinke 13 frei, die um eine Dreh­achse 24 unter der Wirkung einer Feder 25 verschwenkt (Pfeilrichtung) und mit ihrem Rastansatz 13/1 in die Ver­zahnung 26 des Klinkenrades 12 eingreift.If continuous paper is to be written with the printing device shown, then the paper discharge flap 15 corresponding to the ge is used to insert the continuous paper dashed representation opened. By opening this, a projection 23 (FIG. 2) arranged on the paper guide flap 15 releases the pawl 13, which pivots about an axis of rotation 24 under the action of a spring 25 (arrow direction) and with its latching projection 13/1 into the toothing 26 of the ratchet wheel 12 engages.

Damit ist es möglich, das Endlospapier zunächst mit den Stiftenrädern in Eingriff zu bringen und dann soweit in den Papierführungskanal der Schreibwalze 1 zu bewegen, bis es zwischen den Papierandruckrollen 5 und der Schreibwalze vorgespannt ist. Der weitere Einzug kann dann mit Hilfe eines an der Schreibwalze 1 angebrachten Handrades (hier nicht dargestellt) bewerkstelligt werden oder vollauto­matisch durch Betätigen des Schrittmotores 2 der die Schreibwalze 1 antreibt.This makes it possible to first bring the continuous paper into engagement with the pin wheels and then to move it into the paper guide channel of the platen roller 1 until it is pretensioned between the paper pressure rollers 5 and the platen roller. The further feeding can then be accomplished with the aid of a handwheel (not shown here) attached to the platen roller 1 or fully automatically by actuating the stepping motor 2 which drives the platen roller 1.

Die Stiftenräder 10 können nach Überwinden des Hemmungs­widerstandes auch Rückwärts gedreht werden, womit ein ge­naues Einlegen und Vorspannungen des Papieres möglich ist. Der Hemmungswiderstand muß durch entsprechende Di­mensionierung der Feder 25 in Verbindung mit den Flanken jedoch so groß gewählt werden, daß auch schwereres Papier von z.B. 90g/cm² durch das Gesperre gehalten wird, ohne daß es in Folge seines Eigengewichtes aus der Papier­führung gleitet.The pin wheels 10 can also be rotated backwards after overcoming the inhibition resistance, which enables the paper to be inserted and pretensioned precisely. The inhibition resistance must be chosen so large by appropriate dimensioning of the spring 25 in connection with the flanks that even heavier paper from e.g. 90g / cm² is held by the locking mechanism without it sliding out of the paper guide due to its own weight.

Nach Schließen der Papierableitklappe 15 hebt der Ansatz 23 die Klinke 13 aus und das Gesperre wird gelöst.After closing the paper discharge flap 15, the extension 23 lifts the pawl 13 and the locking mechanism is released.

Im eigentlichen Druckbetrieb faßt die optoelektronische Einrichtung die Löcher der Randperforation des Endlos­papieres und vergleicht den so abgemessenen Vorschub mit dem Sollvorschub in Form von elektrischen Signalen der von dem Schrittmotor 2 abgenommen wird. Abhängig von dem Ver­gleichsvorgang wird dann über die Vergleichseinrichtung 22 die Ansteueranordnung 21 und damit der Vorschub und die Position des Endlospapieres korrigiert.In the actual printing operation, the optoelectronic device detects the holes in the edge perforation of the continuous paper and compares the feed measured in this way with the nominal feed in the form of electrical signals which are taken from the stepper motor 2. Depending on the comparison process, the control arrangement 21 and thus the feed and the position of the continuous paper is then corrected via the comparison device 22.

Beim Übergang vom Schreibbetrieb mit Endlospapier auf Schreibbetrieb mit Einzelblättern wird zunächst die Pa­pierableitklappe 15 geöffnet und damit das Gesperre einge­rastet. Da das Gesperre als drehrichtungsbetontes Gesperre ausgebildet ist kann ohne Verschwenken der Leitelemente nach Überwindung der Gesperrehemmungskraft das Papier nach hinten gezogen werden. Dies ist entweder durch Ziehen an dem Endlospapier 4 möglich, oder durch Drehen am Handrad. Nach Freigabe des Einlaufkanales wird die Papierableit­klappe 15 erneut geschlossen und die Einzelblätter 3 können über den Papierführungskanal 9 für Einzelblätter einzeln oder mit Hilfe eines automatischen Feeders dem Pa­pierzuführungskanal 6 der Schreibwalze zugeführt werden.During the transition from writing operation with continuous paper to writing operation with single sheets, the paper discharge flap 15 is first opened and the locking mechanism is thus engaged. Since the locking mechanism is designed as a locking mechanism that emphasizes the direction of rotation, the paper can be pulled backwards without having to pivot the guide elements after overcoming the locking inhibition force. This is possible either by pulling the continuous paper 4, or by turning the handwheel. After the inlet channel has been released, the paper discharge flap 15 is closed again and the individual sheets 3 can be fed individually to the paper feed channel 6 of the platen roller via the paper guide channel 9 for single sheets or with the aid of an automatic feeder.

Claims (5)

1. Papiertransportvorrichtung für Druckeinrichtungen zum alternativen Transport von Einzelblättern (3) und mit Randlochungen versehenem Endlospapier (4), insbesondere für Schreib- oder Büromaschinen mit einer motorisch an­getriebenen Schreibwalze (1), einer elektrooptischen Ab­tasteinrichtung (20) und einem Einlaufkanal (8) für End­lospapier und einem Einlaufkanal (9) für Einzelblätter wobei der Transport sowohl der Einzelblätter (3) als auch des Endlospapieres (4) durch Reibschluß über die Schreib­walze (1) erfolgt und zur Führung des Endlospapieres (4) in Transportrichtung vor der Schreibwalze (1) in die Randlochungen des Endlospapieres (4) eingreifende, miteinander über eine Achse (11) verbundene Stiftenräder (10) vorgesehen sind,
dadurch gekennzeichnet, daß die elektrooptische Abtasteinrichtung (20) im Bereich der Schreibwalze (1) angeordnet ist und einerseits das Vor­handensein von Papier im Bereich der Schreibwalze (1) abtastet, andererseits beim Papiervorschub durch Vergleich des tatsächlichen Vorschubs mit einem Sollwert den Vor­schub korrigiert und daß den Stiftenrädern (10) ein drehrichtungsabhängiges oder drehrichtungsbetontes Ge­sperre zugeordnet ist.1. Paper transport device for printing devices for the alternative transport of single sheets (3) and continuous paper (4) provided with edge perforations, in particular for typewriters or office machines with a motor-driven platen roller (1), an electro-optical scanning device (20) and an inlet channel (8) for Continuous paper and an inlet channel (9) for single sheets, the transport of both the single sheets (3) and the continuous paper (4) by frictional engagement over the platen (1) and for guiding the continuous paper (4) in the transport direction in front of the platen (1) pin wheels (10) engaging in the edge perforations of the continuous paper (4) and connected to one another via an axis (11) are provided,
characterized in that the electro-optical scanning device (20) is arranged in the area of the platen roller (1) and on the one hand scans for the presence of paper in the area of the platen roller (1), on the other hand corrects the feed during paper feed by comparing the actual feed with a target value and in that the pin wheels (10) are assigned a direction-dependent or direction-sensitive locking mechanism. 2. Vorrichtung nach Anspruch 1, dadurch ge­kennzeichnet, daß das drehrichtungsbetonte Gesperre ein mit den Stifenrädern (10) drehfest verbun­denes Klinkenrad (12) aufweist in das als Rastelement eine Klinke (13) über einen Rastansatz (13/1) federnd ein­greift, wobei die Flanken (27) des Rastansatzes (13/1) und/oder der Verzahnung (26) des Klinkenrades (12) der­art ausgebildet sind, daß im eingerasteten Zustand sich ein in eine Drehrichtung (28) stark hemmendes, bei Überschreiten der Hemmkraft jedoch überwindbares Ge­sperre ergibt.2. Apparatus according to claim 1, characterized in that the rotational direction emphasized locking mechanism with the pin wheels (10) rotatably connected ratchet wheel (12) in which a pawl (13) engages resiliently as a latching element via a latching projection (13/1), the Flanks (27) of the locking projection (13/1) and / or the toothing (26) of the ratchet wheel (12) are designed in such a way that in the locked state there is a locking which is strongly inhibiting in one direction of rotation (28), but which can be overcome if the inhibiting force is exceeded results. 3. Vorrichtung nach einem der Ansprüche 1 oder 2, da­durch gekennzeichnet, daß eine ab­schwenkbare Papierleitklappe (15) vorgesehen ist, deren Oberfläche bedarfsweise als Führungsfläche für das End­lospapier (4) ausgebildet ist und die an ihrer Innen­fläche Führungsansätze (17) für das Endlospapier (4) auf­weist, die zusammem mit dem Druckergestell (14) einen Papierzuführungskanal (18) bilden, so daß das Endlospapier (4) mit seinen Randlochungen mit einem vorgegebenen Um­schlingungswinkel um die Stiftenräder (10) geführt wird.3. Device according to one of claims 1 or 2, characterized in that a pivotable paper guide flap (15) is provided, the surface of which, if necessary, is designed as a guide surface for the continuous paper (4) and on its inner surface guide lugs (17) for the continuous paper ( 4), which together with the printer frame (14) form a paper feed channel (18), so that the continuous paper (4) with its edge perforations is guided with a predetermined wrap angle around the pin wheels (10). 4. Vorrichtung nach einem der Ansprüche 1 bis 3, da­durch gekennzeichnet, daß die Papier­ableitklappe (15) mit dem drehrichtungsbetonten Gesperre derart gekoppelt ist, daß im eingeschwenkten Zustand der Papierableitklappe (15) sich das drehrichtungsbetonte Ge­sperre außer Funktion befindet.4. Device according to one of claims 1 to 3, characterized in that the paper discharge flap (15) is coupled to the directional locking mechanism in such a way that the directional locking mechanism is inoperative in the pivoted-in state of the paper discharge flap (15). 5. Vorrichtung nach Anspruch 4, dadurch ge­kennzeichnet, daß die Papierableitklappe (15) einen Ansatz (23) aufweist der im eingeschwenkten Zustand der Papierableitklappe (15) mit der Klinke des Klinkenra­des derart zusammenwirkt, daß diese außer Funktion gesetzt wird.5. The device according to claim 4, characterized in that the paper discharge flap (15) has a projection (23) which in the pivoted-in state of the paper discharge flap (15) interacts with the pawl of the ratchet wheel in such a way that it is deactivated.
EP19870102546 1986-02-25 1987-02-23 Paper feeding device for single sheets and continuous webs in printing devices Withdrawn EP0243601A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863606060 DE3606060C1 (en) 1986-02-25 1986-02-25 Paper transport device for single sheets and continuous paper in printing devices
DE3606060 1986-02-25

Publications (1)

Publication Number Publication Date
EP0243601A1 true EP0243601A1 (en) 1987-11-04

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ID=6294904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870102546 Withdrawn EP0243601A1 (en) 1986-02-25 1987-02-23 Paper feeding device for single sheets and continuous webs in printing devices

Country Status (5)

Country Link
EP (1) EP0243601A1 (en)
JP (1) JPS62199476A (en)
CN (1) CN87100972A (en)
AU (1) AU6918687A (en)
DE (1) DE3606060C1 (en)

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WO1991013764A1 (en) * 1990-03-16 1991-09-19 Mannesmann Ag System for transporting record carriers in web form in printers
FR2753131A1 (en) * 1996-09-06 1998-03-13 Gerber Systems Corp DEVICE FOR WORKING ON SHEETS OF SHEET MATERIAL AND SHEET MATERIAL TO BE USED WITH THIS DEVICE

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
JPH0825539B2 (en) * 1988-08-24 1996-03-13 ローレルバンクマシン株式会社 Coin wrapping paper supply device for coin wrapping machine
DE4039389A1 (en) * 1990-12-10 1992-06-11 Siemens Ag Printer for cut sheet and continuous sheet feed - has paper feed over friction feed print roller with two position lever preventing simultaneous feed of both paper formats
DE29702659U1 (en) * 1997-02-15 1997-12-18 PSi Printer Systems international GmbH, 57080 Siegen Device for transporting continuous paper and cut sheets in printers

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DE2427301A1 (en) * 1973-06-08 1975-01-16 Sperry Rand Corp CONTROL DEVICE FOR POSITIONING A MOVABLE LINK IN A HIGH SPEED PRINTER
EP0038415A1 (en) * 1980-04-15 1981-10-28 Siemens Nixdorf Informationssysteme Aktiengesellschaft Device for a gradual conveyance of recording conveyers to an electro-mechanic writing system
DE3419271A1 (en) * 1983-05-24 1984-11-29 Canon K.K., Tokio/Tokyo WRITING OR PRINTING DEVICE
GB2142879A (en) * 1983-04-12 1985-01-30 Epson Corp Paper guide adapted for use in apparatus for producing a record

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JPS58142877A (en) * 1982-02-19 1983-08-25 Seiko Epson Corp Paper feeder and feed quantity correcting method for printer
JPS6021275A (en) * 1983-07-15 1985-02-02 Matsushita Electric Ind Co Ltd Printing apparatus

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
DE2427301A1 (en) * 1973-06-08 1975-01-16 Sperry Rand Corp CONTROL DEVICE FOR POSITIONING A MOVABLE LINK IN A HIGH SPEED PRINTER
EP0038415A1 (en) * 1980-04-15 1981-10-28 Siemens Nixdorf Informationssysteme Aktiengesellschaft Device for a gradual conveyance of recording conveyers to an electro-mechanic writing system
GB2142879A (en) * 1983-04-12 1985-01-30 Epson Corp Paper guide adapted for use in apparatus for producing a record
DE3419271A1 (en) * 1983-05-24 1984-11-29 Canon K.K., Tokio/Tokyo WRITING OR PRINTING DEVICE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013764A1 (en) * 1990-03-16 1991-09-19 Mannesmann Ag System for transporting record carriers in web form in printers
US5370291A (en) * 1990-03-16 1994-12-06 Mannesmann Aktiengesellschaft System for transporting web-shaped recording substrates in printing devices
FR2753131A1 (en) * 1996-09-06 1998-03-13 Gerber Systems Corp DEVICE FOR WORKING ON SHEETS OF SHEET MATERIAL AND SHEET MATERIAL TO BE USED WITH THIS DEVICE
GB2317162A (en) * 1996-09-06 1998-03-18 Gerber Systems Corp Sheet feeding

Also Published As

Publication number Publication date
DE3606060C1 (en) 1987-04-30
AU6918687A (en) 1987-09-17
JPS62199476A (en) 1987-09-03
CN87100972A (en) 1987-10-21

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