EP0376418B1 - Single sheet supply in office machines, in particular matrix printers - Google Patents

Single sheet supply in office machines, in particular matrix printers Download PDF

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Publication number
EP0376418B1
EP0376418B1 EP89250107A EP89250107A EP0376418B1 EP 0376418 B1 EP0376418 B1 EP 0376418B1 EP 89250107 A EP89250107 A EP 89250107A EP 89250107 A EP89250107 A EP 89250107A EP 0376418 B1 EP0376418 B1 EP 0376418B1
Authority
EP
European Patent Office
Prior art keywords
rollers
paper cassette
paper
frame
sheets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89250107A
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German (de)
French (fr)
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EP0376418A2 (en
EP0376418A3 (en
Inventor
Gerhard Lohrmann
Michael Dipl.-Ing. Setz (Fh)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT89250107T priority Critical patent/ATE90914T1/en
Publication of EP0376418A2 publication Critical patent/EP0376418A2/en
Publication of EP0376418A3 publication Critical patent/EP0376418A3/en
Application granted granted Critical
Publication of EP0376418B1 publication Critical patent/EP0376418B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • 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
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/103—Sheet holders, retainers, movable guides, or stationary guides for the sheet feeding section

Definitions

  • the invention relates to a device for feeding single sheets in office machines, in particular in matrix printers, with a sheet stack and fixed take-off rollers resting thereon, which are driven in rotation, wherein a single sheet can be pulled off via separate corners of a paper receiving frame and the sheet stack between lateral paper guide frames and on a spring-loaded one Swivel plate lies.
  • Such stacks of sheets consisting of a hundred or more individual sheets can either be entered directly on the office machine in paper receptacles arranged for this purpose (DE-32 47 341 / US 4,613,124) or else by means of paper cassettes which can be used in existing guides and filled outside the office machine.
  • the difference between the two types of paper input is either to fill the sheet stack directly into the paper holding frame of the office machine or to insert it outside of the office machine first into a paper cassette and then insert it into the office machine. Both methods have advantages that either have a positive effect on the purchase price of the office machine or in the operation of the office machine.
  • the object of the present invention is to make the advantages of both types of sheet stacking usable for an office machine.
  • the stated object is achieved in that the swivel plate or a pair of swivel plates are in a first spaced position closer to the take-off rollers or in a more distant, second spaced position is pivotable and can be locked or unlocked in the second spacing position and that, when the second spacing position is set, an additional paper cassette consisting of a container with a resilient insert base can be inserted against the pivoting plate.
  • these measures solve the difficulty of achieving the correct distance to the take-off rollers and to the separation corners in relation to the sheet stack, both without and with an additional paper cassette, and in addition, despite different distances, also pressing the same size of a sheet stack to ensure the take-off rollers.
  • This advantageously enables the stack of sheets to be inserted in the respectively locked positions of the respective documents (swivel plate or additional paper cassette).
  • the advantage of a locked "pad” for the sheet stack to be inserted can be achieved in that a two-armed locking lever engages on the pivot plate, which is pivotably mounted on the device frame and which can be locked or unlocked with its second lever arm on the device frame.
  • a desired parallel adjustment of the swivel plate with one-sided arrangement of the locking lever mentioned can also be achieved in that on the swivel plate underside there is a swivel shaft extending over the width of the two lateral paper guide frames, at the ends of which gears are arranged in a rotationally fixed manner, each dimensioned in accordance with the swivel radius of the locking lever engage curved Zannstangen, which are assigned to the lateral paper guide frame, each having a cylindrical pivot shaft end is guided in an arcuate longitudinal guide of the locking lever.
  • An improvement of the invention is that the additional paper cassette has a resilient insert base and separate separation corners are arranged on the cassette frame and that the resilient insert base can be locked or unlocked.
  • the company's own separation corners replace those in the device.
  • the insertion and locking of the additional paper cassette is made even easier by the fact that lateral guides are provided on the additional paper cassette, which fix the inserted paper cassette at the same distance with which the separating corners of the paper guide frame are fixed to the circumference of the fixed take-off rollers.
  • the resilient insert base of the additional paper cassette is held in a filling position by means of a locking member and that when the additional paper cassette is inserted, the locking member can be unlocked so that the insert base rests with the sheet stack against the separating rollers and unlocks that by unlocking the locking lever, the full pressing force of the spring-loaded swivel plate or the swivel plate pair can be transferred to the take-off rollers.
  • the device shown is used to feed single sheets 1 in office machines 2, the like from matrix printers, thermal transfer printers, laser side printers and the like. consist.
  • the single sheets are introduced in the form of sheet stacks 3, and the sheet stacks 3 are in the operating position against fixed, rotationally drivable take-off rollers 4, which are in such a frictional connection with the first single sheet 1 on top of the sheet stack 3 that it separates from the next single sheet can be.
  • the take-off rollers 4 can be driven in rotation and, if desired, can also be reversed.
  • the respective single sheet 1 is driven by the take-off rollers 4 and thereby moved over separation corners 5 which are fastened to a paper holding frame 6 which is fixedly arranged on the device.
  • the paper receiving frame 6 has lateral paper guide frames 7a and 7b. If there is no other possibility, the sheet stack 3 rests on one or on two swivel plates 8 or 8a, 8b. Such Swivel plate 8 is normally only sprung and “swivelable" within the spring travel, ie otherwise rigidly arranged.
  • the swivel plate 8 or the swivel plate pair 8a, 8b can be swiveled into two spacing positions 9 or 10 and locked in the second spacing position 10. Accordingly, the travel of a spring 11 is large enough.
  • the second spacing position 10 is shown in broken lines in FIG. 2 in the locked position.
  • an additional paper cassette 12 can now be used, in which different types of paper or different format heights can be contained.
  • the additional paper cassette 12 consists of a container 13 with an insert base 14 resilient by a spring 13a. The container 13 is inserted against the swivel plate 8 (or 8a, 8b), starting from the position shown in FIG. 1.
  • a two-armed latching lever 15 now engages on the swivel plate 8 (8a, 8b), which is pivotably mounted on a device frame 2a by means of an axis 15a and which can be snapped onto the device frame 2a with its second lever arm 16 (FIG. 3).
  • the lever arm 16 forms a spring arm 17 which engages with a nose 18 in a latching recess 19.
  • a swivel shaft 21 extending over the width 20 of the two lateral paper guide frames 7a and 7b is provided in a guide housing 22.
  • gear wheels 23 are fixed in a rotationally fixed manner on the pivot shaft ends 21a.
  • the toothed wheels 23 mesh in an arcuate toothed rack 24, which are designed with a swivel radius 25 in accordance with the swivel movement of the swivel plate 8 (8a, 8b).
  • the pivot shaft ends 21a are also guided in longitudinal guides 26 which result from the movement path.
  • the first spacing position 9 of the swivel plate 8 (8a, 8b) is determined by the take-off rollers 4.
  • the additional paper cassette 12 with the resilient insert base 14 forms a cassette frame 29 with separate corners 30 relative to the paper receiving frame 6.
  • the resilient insert base 14 can be locked or unlocked.
  • lateral guides 31 are provided on the additional paper cassette 12. According to FIG. 4, these guides 31 (detail A in FIG. 1) are initially provided for maintaining a distance which the separating corners 5 of the paper guide frame 7a, 7b adhere to the circumference of the fixed take-off rollers 4. The separation corners 30 to the take-off rollers 4 should also have the same distance.
  • the additional paper cassette 12 with the resilient insert base 14 is operated when pushed in as follows:
  • the resilient insert base 14 is pivotally supported in the paper cassette 12 by means of a pivot bearing 32.
  • a rocker arm 33 locks in the prestressed position of the spring 13a (filling position).
  • the rocker arm 33 is over an axis 34 on a housing 36 for the pivot plate 8 swinging pivoted. He also carries a locking member 37 which is guided on a limited path length 35.
  • the rocker arm 33 strikes at 38 against the housing 36, so that the locking member 37 is unlocked, after which the spring 13a presses the insert base 14 with the sheet stack 3 which has been inserted in the meantime against the take-off rollers 4.
  • the force of the spring 11 is released and also presses the Swivel plate 8 (8a, 8b) with the cassette frame 29 against guide ribs 39 (Fig. 1).

Landscapes

  • Sheets, Magazines, And Separation Thereof (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Ticket-Dispensing Machines (AREA)
  • Handling Of Cut Paper (AREA)

Abstract

In a device for single-sheet (1) supply in office machines (2), the single sheets (1) form a stack (3) of sheets, on which stationary, rotary-driven draw-off rollers (4) rest, in which case one single sheet (1) can be drawn off via separating corners (5) of a paper pick-up frame (6) and the stack (3) of sheets lies on a sprung swivel plate between lateral paper guide frames (7a, 7b). The optional use of the fixed paper pick-up frame (6) or an additional paper cassette (12) is proposed, the separating corners (5, 30), present on paper pick-up frames (6) and the additional paper cassette (12), assuming the same spacing in relation to the circumference of draw-off rollers (4). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung für die Zuführung von Einzelblättern in Büromaschinen, insbesondere in Matrixdruckern, mit einem Blattstapel und auf diesem aufliegenden feststehenden Abzugsrollen, die drehangetrieben sind, wobei ein Einzelblatt über Separierecken eines Papieraufnahmerahmens abziehbar ist und der Blattstapel zwischen seitlichen Papierführungsrahmen und auf einer gefederten Schwenkplatte liegt.The invention relates to a device for feeding single sheets in office machines, in particular in matrix printers, with a sheet stack and fixed take-off rollers resting thereon, which are driven in rotation, wherein a single sheet can be pulled off via separate corners of a paper receiving frame and the sheet stack between lateral paper guide frames and on a spring-loaded one Swivel plate lies.

Solche aus hundert und mehr Einzelblättern bestehende Blattstapel können entweder unmittelbar an der Büromaschine in dafür fest angeordnete Papieraufnahmerahmen eingegeben werden (DE-32 47 341/ US 4,613,124) oder aber mittels in vorhandenen Führungen einsetzbare, außerhalb der Büromaschine gefüllte Papierkassetten. Der Unterschied zwischen beiden Arten von Papiereingaben besteht darin, entweder den Blattstapel direkt in den Papieraufnahmerahmen der Büromaschine einzufüllen oder ihn außerhalb der Büromaschine zuerst in eine Papierkassette und diese anschließend in die Büromaschine einzusetzen. Beide Methoden besitzen Vorteile, die sich entweder beim Anschaffungspreis der Büromaschine oder bei der Bedienung der Büromaschine positiv auswirken.Such stacks of sheets consisting of a hundred or more individual sheets can either be entered directly on the office machine in paper receptacles arranged for this purpose (DE-32 47 341 / US 4,613,124) or else by means of paper cassettes which can be used in existing guides and filled outside the office machine. The difference between the two types of paper input is either to fill the sheet stack directly into the paper holding frame of the office machine or to insert it outside of the office machine first into a paper cassette and then insert it into the office machine. Both methods have advantages that either have a positive effect on the purchase price of the office machine or in the operation of the office machine.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die Vorteile beider Blattstapel-Beschickungsarten für eine Büromaschine nutzbar zu machen.The object of the present invention is to make the advantages of both types of sheet stacking usable for an office machine.

Die gestellte Aufgabe wird aufgrund der eingangs bezeichneten Vorrichtung erfindungsgemäß dadurch gelöst , dar die Schwenkplatte bzw. ein Schwenkplattenpaar in eine den Abzugsrollen näherliegende erste Abstandsposition oder in eine entferntere, zweite Abstandsposition schwenkbar und in der zweiten Abstandsposition verriegelbar bzw. entriegelbar ist und daß bei eingestellter zweiter Abstandsposition eine zusätzliche Papierkassette, bestehend aus einem Behälter mit einem federnden Einsatzboden gegen die Schwenkplatte anliegend einführbar ist. Diese Maßnahmen lösen bei Anwendung einer zusätzlichen Papierkassette in einer Büromaschine die Schwierigkeit, sowohl ohne als auch mit zusätzlicher Papierkassette den richtigen Abstand zu den Abzugsrollen und zu den Separierecken, bezogen auf den Blattstapel, zu erzielen und außerdem trotz unterschiedlicher Abstände auch eine gleichgroße Anpressung eines Blattstapels an die Abzugsrollen zu gewährleisten. Hierbei wird vorteilhafterweise das Einlegen des Blattstapels in jeweils verriegelten Positionen der jeweiligen Unterlagen (Schwenkplatte oder zusätzliche Papierkassette) ermöglicht.According to the invention, the stated object is achieved in that the swivel plate or a pair of swivel plates are in a first spaced position closer to the take-off rollers or in a more distant, second spaced position is pivotable and can be locked or unlocked in the second spacing position and that, when the second spacing position is set, an additional paper cassette consisting of a container with a resilient insert base can be inserted against the pivoting plate. When using an additional paper cassette in an office machine, these measures solve the difficulty of achieving the correct distance to the take-off rollers and to the separation corners in relation to the sheet stack, both without and with an additional paper cassette, and in addition, despite different distances, also pressing the same size of a sheet stack to ensure the take-off rollers. This advantageously enables the stack of sheets to be inserted in the respectively locked positions of the respective documents (swivel plate or additional paper cassette).

Der Vorteil einer verriegelten "Unterlage" für den einzulegenden Blattstapel kann dahingehend erreicht werden, daß an der Schwenkplatte ein zweiarmiger Rasthebel angreift, der am Vorrichtungsrahmen schwenkbar gelagert ist und der mit seinem zweiten Hebelarm am Vorrichtungsrahmen einrastbar bzw. entriegelbar ist.The advantage of a locked "pad" for the sheet stack to be inserted can be achieved in that a two-armed locking lever engages on the pivot plate, which is pivotably mounted on the device frame and which can be locked or unlocked with its second lever arm on the device frame.

Eine anzustrebende Parallelverstellung der Schwenkplatte bei einseitiger Anordnung des erwähnten Rasthebels kann ferner dadurch erzielt werden, daß an der Schwenkplattenunterseite eine über die Breite der zwei seitlichen Papierführungsrahmen verlaufende Schwenkwelle anliegt, an deren Enden Zahnräder drehfest angeordnet sind, die jeweils in entsprechend dem Schwenkradius des Rasthebels bemessene bogenförmig verlaufende Zannstangen eingreifen, die den seitlichen Papierführungsrahmen zugeordnet sind, wobei jeweils ein zylindrisches Schwenkwellenende in einer bogenförmigen Längsführung des Rasthebels geführt ist.A desired parallel adjustment of the swivel plate with one-sided arrangement of the locking lever mentioned can also be achieved in that on the swivel plate underside there is a swivel shaft extending over the width of the two lateral paper guide frames, at the ends of which gears are arranged in a rotationally fixed manner, each dimensioned in accordance with the swivel radius of the locking lever engage curved Zannstangen, which are assigned to the lateral paper guide frame, each having a cylindrical pivot shaft end is guided in an arcuate longitudinal guide of the locking lever.

Eine Verbesserung der Erfindung besteht darin, daß die zusätzliche Papierkassette einen federnden Einsatzboden aufweist und am Kassettenrahmen eigene Separierecken angeordnet sind und daß der federnde Einsatzboden arretierbar bzw. entriegelbar ist. Die eigenen Separierecken ersetzen die im Gerät vorhandenen.An improvement of the invention is that the additional paper cassette has a resilient insert base and separate separation corners are arranged on the cassette frame and that the resilient insert base can be locked or unlocked. The company's own separation corners replace those in the device.

Das Einführen und Arretieren der zusätzlichen Papierkassette wird noch dadurch erleichtert, indem an der zusätzlichen Papierkassette seitliche Führungen vorgesehen sind, die die eingesetzte Papierkassette mit demselben Abstand festlegen, mit dem die Separierecken des Papierführungsrahmens zu dem Umfang der feststehenden Abzugsrollen festgelegt sind.The insertion and locking of the additional paper cassette is made even easier by the fact that lateral guides are provided on the additional paper cassette, which fix the inserted paper cassette at the same distance with which the separating corners of the paper guide frame are fixed to the circumference of the fixed take-off rollers.

Sämtliche Funktionsvoraussetzungen werden außerdem nach weiteren Merkmalen dadurch erfüllt, daß der federnde Einsatzboden der zusätzlichen Papierkassette mittels eines Verriegelungsgliedes in einer Füllstellung gehalten ist und daß beim Einschieben der zusätzlichen Papierkassette das Verriegelungsglied entriegelbar ist, so daß der Einsatzboden mit dem Blattstapel gegen die Separierrollen entriegelt anliegt und daß durch Entriegeln des Rasthebels die volle Andrückkraft der gefederten Schwenkplatte bzw. des Schwenkplattenpaares auf die Abzugsrollen übertragbar ist.All functional requirements are also met according to further features in that the resilient insert base of the additional paper cassette is held in a filling position by means of a locking member and that when the additional paper cassette is inserted, the locking member can be unlocked so that the insert base rests with the sheet stack against the separating rollers and unlocks that by unlocking the locking lever, the full pressing force of the spring-loaded swivel plate or the swivel plate pair can be transferred to the take-off rollers.

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

Fig. 1
eine perspektivische Ansicht einer Vorrichtung für die Zuführung von Einzelblättern mit einer einführbereiten zusätzlichen Papierkassette,
Fig. 2
einen senkrechten Teilschnitt durch den Bereich der Schwenkplatte,
Fig. 3
eine Seitenansicht des Bereichs um den Rasthebel,
Fig. 4
einen senkrechten Teilschnitt in einer zur Schnittebene nach Fig. 2 parallelen Ebene im Bereich der seitlichen Führung der zusätzlichen Papierkassette gemäß Einzelheit A in Fig. 1 und
Fig. 5
eine Draufsicht auf einen Randbereich des Gegenstandes nach Fig. 4.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it
Fig. 1
1 shows a perspective view of a device for feeding single sheets with an additional paper cassette ready for insertion,
Fig. 2
a vertical partial section through the area of the swivel plate,
Fig. 3
a side view of the area around the locking lever,
Fig. 4
a vertical partial section in a plane parallel to the sectional plane of FIG. 2 in the region of the lateral guidance of the additional paper cassette according to detail A in Fig. 1 and
Fig. 5
4 shows a plan view of an edge region of the object according to FIG. 4.

Die Dargestellte Vorrichtung dient der Zuführung von Einzelblättern 1 in Büromaschinen 2, die aus Matrixdruckern, Thermotransferdruckern, Laser-Seitendruckern u.dgl. bestehen. Die Einzelblätter werden in Form von Blattstapeln 3 eingebracht, und die Blattstapel 3 liegen in Betriebslage gegen feststehende, drehantreibbare Abzugsrollen 4 an, die in einer solchen reibschlüssigen Verbindung mit dem jeweils oben auf dem Blattstapel 3 ersten Einzelblatt 1 stehen, daß dieses vom nächstfolgenden Einzelblatt separiert werden kann. Hierzu sind die Abzugsrollen 4 drehantreibbar und falls erwünscht auch reversierbar. Das jeweilige Einzelblatt 1 wird durch die Abzugrollen 4 angetrieben und dabei über Separierecken 5 bewegt, die an einem Papieraufnahmerahmen 6 befestigt sind, der fest an der Vorrichtung angeordnet ist. Der Papieraufnahmerahmen 6 besitzt seitliche Papierführungsrahmen 7a und 7b. Der Blattstapel 3 liegt, falls keine andere Moglichkeit besteht, auf einer oder auf zwei Schwenkplatten 8 bzw. 8a, 8b auf. Eine solche Schwenkplatte 8 ist normalerweise nur gefedert und innerhalb des Federwegs "schwenkbar", d.h. ansonsten starr angeordnet.The device shown is used to feed single sheets 1 in office machines 2, the like from matrix printers, thermal transfer printers, laser side printers and the like. consist. The single sheets are introduced in the form of sheet stacks 3, and the sheet stacks 3 are in the operating position against fixed, rotationally drivable take-off rollers 4, which are in such a frictional connection with the first single sheet 1 on top of the sheet stack 3 that it separates from the next single sheet can be. For this purpose, the take-off rollers 4 can be driven in rotation and, if desired, can also be reversed. The respective single sheet 1 is driven by the take-off rollers 4 and thereby moved over separation corners 5 which are fastened to a paper holding frame 6 which is fixedly arranged on the device. The paper receiving frame 6 has lateral paper guide frames 7a and 7b. If there is no other possibility, the sheet stack 3 rests on one or on two swivel plates 8 or 8a, 8b. Such Swivel plate 8 is normally only sprung and "swivelable" within the spring travel, ie otherwise rigidly arranged.

Im vorliegenden Fall (Fig. 1 und 2) kann die Schwenkplatte 8 bzw. das Schwenkplattenpaar 8a, 8b in zwei Abstandspositionen 9 bzw. 10 verschwenkt und in der zweiten Abstandsposition 10 verriegelt werden. Entsprechend ist der Federweg einer Feder 11 groß genug. Die zweite Abstandsposition 10 ist in Fig. 2 in der verriegelten Stellung gestrichelt gezeichnet. In dieser zweiten Abstandspositon 10 kann nunmehr eine zusätzliche Papierkassette 12 eingesetzt werden, in der unterschiedliche Papiersorten oder unterschiedliche Format-Höhen enthalten sein können. Die zusätzliche Papierkassette 12 besteht aus einem Behälter 13 mit einem durch eine Feder 13a federnden Einsatzboden 14. Der Behälter 13 wird gegen die Schwenkplatte 8 (bzw. 8a, 8b) anliegend von der in Fig. 1 dargestellten Position ausgehend eingeführt.In the present case (FIGS. 1 and 2), the swivel plate 8 or the swivel plate pair 8a, 8b can be swiveled into two spacing positions 9 or 10 and locked in the second spacing position 10. Accordingly, the travel of a spring 11 is large enough. The second spacing position 10 is shown in broken lines in FIG. 2 in the locked position. In this second spacing position 10, an additional paper cassette 12 can now be used, in which different types of paper or different format heights can be contained. The additional paper cassette 12 consists of a container 13 with an insert base 14 resilient by a spring 13a. The container 13 is inserted against the swivel plate 8 (or 8a, 8b), starting from the position shown in FIG. 1.

An der Schwenkplatte 8 (8a, 8b) greift nunmehr ein zweiarmiger Rasthebel 15 an, der an einem Vorrichtungsrahmen 2a mittels einer Achse 15a schwenkbar gelagert ist und der mit seinem zweiten Hebelarm 16 (Fig. 3) am Vorrichtungsrahmen 2a einrastbar ist. Der Hebelarm 16 bildet hierzu einen Federarm 17, der mit einer Nase 18 in eine Rastvertiefung 19 eingreift.A two-armed latching lever 15 now engages on the swivel plate 8 (8a, 8b), which is pivotably mounted on a device frame 2a by means of an axis 15a and which can be snapped onto the device frame 2a with its second lever arm 16 (FIG. 3). For this purpose, the lever arm 16 forms a spring arm 17 which engages with a nose 18 in a latching recess 19.

Weiterhin ist an der Schwenkplattenunterseite 8c eine über die Breite 20 der zwei seitlichen Papierführungsrahmen 7a und 7b verlaufende Schwenkwelle 21 in einem Führungsgehäuse 22 verlaufend vorgesehen. An den Enden der Schwenkwelle 21 sind jeweils Zahnräder 23 drehfest auf den Schwenkwellenenden 21a befestigt. Die Zahnräder 23 kämmen in einer bogenförmigen Zahnstange 24, die entsprechend der Schwenkbewegung der Schwenkplatte 8 (8a, 8b) mit einem Schwenkradius 25 ausgeführt sind.Furthermore, on the underside of the swivel plate 8c, a swivel shaft 21 extending over the width 20 of the two lateral paper guide frames 7a and 7b is provided in a guide housing 22. At the ends of the pivot shaft 21, gear wheels 23 are fixed in a rotationally fixed manner on the pivot shaft ends 21a. The toothed wheels 23 mesh in an arcuate toothed rack 24, which are designed with a swivel radius 25 in accordance with the swivel movement of the swivel plate 8 (8a, 8b).

Die Schwenkwellenenden 21a sind außerdem in sich aus der Bewegungsbahn ergebenden Längsführungen 26 geführt. In der vorderen Stellung 27 des Rasthebels 15 ist die zweite Abstandsposition 10 und in der hinteren Stellung 28 (Fig. 3) ist die erste Abstandsposition 9 der Schwenkplatte 8 (8a, 8b) von den Abzugsrollen 4 bestimmt.The pivot shaft ends 21a are also guided in longitudinal guides 26 which result from the movement path. In the front position 27 of the locking lever 15, the second spacing position 10 and in the rear position 28 (FIG. 3) the first spacing position 9 of the swivel plate 8 (8a, 8b) is determined by the take-off rollers 4.

Die zusätzliche Papierkassette 12 mit dem federnden Einsatzboden 14 bildet einen Kassettenrahmen 29 mit gegenüber dem Papieraufnahmerahmen 6 eigenen Separierecken 30. Der federnde Einsatzboden 14 ist arretierbar bzw. entriegelbar.The additional paper cassette 12 with the resilient insert base 14 forms a cassette frame 29 with separate corners 30 relative to the paper receiving frame 6. The resilient insert base 14 can be locked or unlocked.

Hierzu sind an der zusätzlichen Papierkassette 12 seitliche Führungen 31 vorgesehen. Diese Führungen 31 (Einzelheit A in Fig. 1) sind gemäß Fig. 4 zunächst für die Einhaltung eines Abstandes vorgesehen, die die Separierecken 5 des Papierführungsrahmens 7a, 7b zu dem Umfang der feststehenaen Abzugsrollen 4 einhalten. Denselben Abstand sollen aber auch die Separierecken 30 zu den Abzugsrollen 4 einnehmen.For this purpose, lateral guides 31 are provided on the additional paper cassette 12. According to FIG. 4, these guides 31 (detail A in FIG. 1) are initially provided for maintaining a distance which the separating corners 5 of the paper guide frame 7a, 7b adhere to the circumference of the fixed take-off rollers 4. The separation corners 30 to the take-off rollers 4 should also have the same distance.

Die zusätzliche Papierkassette 12 mit dem federnden Einsatzboden 14 wird beim Einschieben wie folgt bedient: Der federnde Einsatzboden 14 ist mittels eines Schwenklagers 32 in der Papierkassette 12 schwenkgelagert In der vorgespannten Stellung der Feder 13a (Füllstellung) verriegelt ein Schwinghebel 33. Der Schwinghebel 33 ist um eine Achse 34 an einem Gehäuse 36 für die Schwenkplatte 8 schwingend drehgelagert. Außerdem trägt er ein Verriegelungsglied 37, das auf einer begrenzten Weglänge 35 geführt ist. Beim Einschieben der zusätzlichen Papierkassette 12 schlägt der Schwinghebel 33 bei 38 gegen das Gehäuse 36, so daß das Verriegelungsglied 37 entriegelt wird, wonach die Feder 13a den Einsatzboden 14 mit dem zwischenzeitlich eingesetzten Blattstapel 3 gegen die Abzugsrollen 4 drückt. Durch Entriegeln des Rasthebels 15 wird die Kraft der Feder 11 frei und drückt zusätzlich noch die Schwenkplatte 8 (8a, 8b) mit dem Kassettenrahmen 29 gegen Führungsrippen 39 (Fig. 1).The additional paper cassette 12 with the resilient insert base 14 is operated when pushed in as follows: The resilient insert base 14 is pivotally supported in the paper cassette 12 by means of a pivot bearing 32. A rocker arm 33 locks in the prestressed position of the spring 13a (filling position). The rocker arm 33 is over an axis 34 on a housing 36 for the pivot plate 8 swinging pivoted. He also carries a locking member 37 which is guided on a limited path length 35. When inserting the additional paper cassette 12, the rocker arm 33 strikes at 38 against the housing 36, so that the locking member 37 is unlocked, after which the spring 13a presses the insert base 14 with the sheet stack 3 which has been inserted in the meantime against the take-off rollers 4. By unlocking the locking lever 15, the force of the spring 11 is released and also presses the Swivel plate 8 (8a, 8b) with the cassette frame 29 against guide ribs 39 (Fig. 1).

Claims (6)

  1. An apparatus for feeding single sheets (1) in office machines (2), in particular in matrix printers, comprising a stack of sheets (3) and fixed take-off rollers (4) lying thereon which are driven in rotation, with one single sheet (1) being able to be taken off via separating corners (5) of a paper-holding frame (6) and the stack of sheets (3) lying between lateral paper guidance frames (7a, 7b) and on a sprung pivoting plate (8),
    characterised in that the pivoting plate (8) or a pair (8a, 8b) of pivoting plates can be pivoted into a first spaced position (9) closer to the take-off rollers (4) or into a more distant, second spaced position (10), and can be locked in or unlocked from the second spaced position (10) and that when the second spaced position (10) is set an additional paper cassette (12), consisting of a container (13) with a resilient insert base (14) can be introduced, lying against the pivoting plate (8; 8a, 8b).
  2. An apparatus according to Claim 1, characterised in that a two-armed catch lever (15) engages on the pivoting plate (8), which lever is mounted to pivot on the apparatus frame (2a) and which can snap onto or be unlocked from the apparatus frame (2a) with its second lever arm (16).
  3. An apparatus according to Claims 1 and 2, characterised in that a pivoting shaft (21) which extends across the width (20) of the two lateral paper guidance frames (7a, 7b) lies against the underside (8c) of the pivoting plate, on the ends of which shaft cog wheels (23) are arranged so as to be resistant to rotation, each of which cog wheels engages in toothed racks (24) which run in an arcuate shape dimensioned so as to correspond to the pivot radius (25) of the catch lever (15), which racks are associated with the lateral paper guidance frames (7a, 7b), with one cylindrical end (21a) of the pivot shaft being guided in an arcuate longitudinal guide (26) of the catch lever (15) in each case.
  4. An apparatus according to one or more of Claims 1 to 3, characterised in that the additional paper cassette (12) has a resilient insert base (14) and individual separating corners (30) are located on the cassette frame (29), and that the resilient insert base (14) can be locked or unlocked.
  5. An apparatus according to one or more of Claims 1 to 4, characterised in that lateral guides (31) are provided on the additional paper cassette (12), which guides fix the inserted paper cassette (12) at the same distance at which the separating corners (5) of the paper guidance frame (7a, 7b) are fixed to the periphery of the fixed take-off rollers (4).
  6. An apparatus according to one or more of Claims 1 to 5, characterised in that the resilient insert base (14) of the additional paper cassette (12) is held in a filling position by means of a locking member (37) and that when the additional paper cassette (12) is inserted the locking member (37) can be unlocked, so that the insert base (14) with the stack of sheets (3) lies unlocked against the separating rollers (4) and that the full pressure of the sprung pivoting plate (8) or of the pair of pivoting plates (8a, 8b) can be transferred to the take-off rollers (4) by unlocking the catch lever (15).
EP89250107A 1988-12-27 1989-12-05 Single sheet supply in office machines, in particular matrix printers Expired - Lifetime EP0376418B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89250107T ATE90914T1 (en) 1988-12-27 1989-12-05 DEVICE FOR FEEDING SINGLE SHEETS IN OFFICE MACHINES, ESPECIALLY IN MATRIX PRINTERS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3844325A DE3844325A1 (en) 1988-12-27 1988-12-27 DEVICE FOR THE INPUT OF SINGLE SHEETS IN OFFICE MACHINES, ESPECIALLY IN MATRIX PRINTERS
DE3844325 1988-12-27

Publications (3)

Publication Number Publication Date
EP0376418A2 EP0376418A2 (en) 1990-07-04
EP0376418A3 EP0376418A3 (en) 1991-02-06
EP0376418B1 true EP0376418B1 (en) 1993-06-23

Family

ID=6370527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89250107A Expired - Lifetime EP0376418B1 (en) 1988-12-27 1989-12-05 Single sheet supply in office machines, in particular matrix printers

Country Status (5)

Country Link
US (1) US5054759A (en)
EP (1) EP0376418B1 (en)
JP (1) JPH02249824A (en)
AT (1) ATE90914T1 (en)
DE (2) DE3844325A1 (en)

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US7909524B2 (en) * 2005-06-30 2011-03-22 Lexmark International, Inc. Folding edge guide assembly for an imaging apparatus
US9283784B2 (en) * 2012-04-02 2016-03-15 Toshiba Tec Kabushiki Kaisha Printer

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Also Published As

Publication number Publication date
ATE90914T1 (en) 1993-07-15
DE3844325A1 (en) 1990-06-28
US5054759A (en) 1991-10-08
EP0376418A2 (en) 1990-07-04
EP0376418A3 (en) 1991-02-06
DE58904795D1 (en) 1993-07-29
JPH02249824A (en) 1990-10-05

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