EP0167988B1 - Paper supply holder for printing mechanisms having distance elements arranged on the depositing surface - Google Patents

Paper supply holder for printing mechanisms having distance elements arranged on the depositing surface Download PDF

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Publication number
EP0167988B1
EP0167988B1 EP85108298A EP85108298A EP0167988B1 EP 0167988 B1 EP0167988 B1 EP 0167988B1 EP 85108298 A EP85108298 A EP 85108298A EP 85108298 A EP85108298 A EP 85108298A EP 0167988 B1 EP0167988 B1 EP 0167988B1
Authority
EP
European Patent Office
Prior art keywords
paper
paper supply
stack
supply holder
depositing surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85108298A
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German (de)
French (fr)
Other versions
EP0167988A3 (en
EP0167988A2 (en
Inventor
Wilhelm Dipl.-Ing Schröttle (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.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0167988A2 publication Critical patent/EP0167988A2/en
Publication of EP0167988A3 publication Critical patent/EP0167988A3/en
Application granted granted Critical
Publication of EP0167988B1 publication Critical patent/EP0167988B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/58—Supply holders for sheets or fan-folded webs, e.g. shelves, tables, scrolls, pile holders

Definitions

  • the invention relates to a paper supply cassette according to the preamble of patent claim 1.
  • Such paper supply cassettes are e.g. B from IBM Technical Disclosure Bulletin, Volume 23, No. 3, August 1980, pages 947, 948.
  • DE-AS 28 16 448 a device for feeding paper sheets for a writing office machine, which has a paper supply cassette, which consists of a rectangular trough-shaped housing and has a base plate and side walls. In parallel to the lateral side walls, guide walls are inserted into the cassette, which rest laterally on the paper stack. At the upper end of the guide walls, a pressure plate is pivoted near the base plate. The pressure plate rests on the back of a paper stack and is pressed into the open side of the housing by a compression spring which is inserted at the lower, freely pivotable end of the pressure plate between it and the base plate. Separating corner flaps are attached to the lower end of the two side guide walls.
  • a separating roller which is driven by a motor, is provided in the swivel range of the pressure plate for pulling off the individual sheets from the paper stack.
  • the separating roller pulls the single sheets down from the stack after overcoming the separating corner flaps.
  • This peeling takes place in that the singling roll bulges the paper down against the singling corner flaps and the paper jumps over the singling corner flaps due to its inherent elasticity.
  • Stacks of paper also have the property that the single sheets lie very close together and completely flat, so that when a tangential force is exerted from the separating roller, the single sheet slides out of the corner tabs only with difficulty due to the self-stiffening effect of the paper.
  • the object of the invention is to design a paper supply cassette for printing devices so that a safe and easy removal of the individual sheets from the paper stack to the last sheet of the paper stack is possible.
  • the pull-off element should act on the paper stack with as little pressure as possible.
  • the spacer consists of a wedge-shaped part and an adjoining spacer made of a material with increased frictional force compared to paper, the removal of the individual sheets is additionally facilitated.
  • the paper stack can be separated to the last sheet without difficulty.
  • the wedge-shaped part of the spacer element serves for easier insertion of the paper stack.
  • the rubber layer on the spacer element ensures that all sheets can be pulled off the paper stack without having to pull off several single sheets at a time with a small number of single sheets.
  • a paper supply cassette as z. B. is described in DE-AS 28 16 448, consists of a rectangular trough-shaped housing that is preferably made of plastic and has a base plate B and side walls S which abut the side of the paper stack.
  • a pressure plate AP is pivotally articulated via a joint GL and is pressed against the open housing side by a compression spring DF which is inserted at the lower freely pivotable end of the pressure plate AP between the latter and the base plate B.
  • a separating corner flap VE is attached at the end of the two lateral guide walls S.
  • This separating corner flap overlaps in the region of the open housing side, as shown in FIG. 2, the lower corners of the pressure plate AP and thus the paper stack arranged between the pressure plate AP and the separating flap.
  • wedge-shaped spacing elements D are arranged on the pressure plate AP serving as a paper tray. These spacing elements D exist of a rectangular rubber part G with a wedge-shaped part K made of plastic adjoining it upwards.
  • the spacer elements have the task of slightly bulging the paper stack P between the singling corner flaps and the singling roll A and thus forming a kind of predetermined kink. This makes it much easier to pull off the individual sheets from the paper stack P with the aid of the motorized separating roller A operated in the direction of the arrow.
  • the rubber part of the spacer elements D holds the paper stack on its back, so that only a single sheet is safely removed from the separating roller.

Landscapes

  • Sheets, Magazines, And Separation Thereof (AREA)

Description

Die Erfindung betrifft eine Papiervorratskassette gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a paper supply cassette according to the preamble of patent claim 1.

Derartige Papiervorratskassetten sind z. B aus IBM-Technical Disclosure Bulletin, Band 23, Nr. 3, August 1980, Seiten 947, 948 bekannt.Such paper supply cassettes are e.g. B from IBM Technical Disclosure Bulletin, Volume 23, No. 3, August 1980, pages 947, 948.

Es ist weiterhin aus der DE-AS 28 16 448 eine Vorrichtung zum Zuführen von Papierblättern für eine schreibende Büromaschine bekannt, die eine Papiervorratskassette aufweist, die aus einem rechteckigen wannenförmigen Gehäuse besteht und eine Bodenplatte und Seitenwände aufweist. Parallel zu den seitlichen Seitenwänden sind Führungswände in die Kassette eingesetzt, die seitlich an dem Papierstapel anliegen. Am oberen Ende der Führungswände ist in der Nähe der Bodenplatte eine Anpreßplatte schwenkbar angelenkt. Die Anpreßplatte liegt an der Rückseite eines Papierstapels an und wird in die offene Gehäuseseite gepreßt, durch eine Druckfeder die am unteren frei schwenkbaren Ende der Anpreßplatte zwischen dieser und der Bodenplatte eingesetzt ist. Am unteren Ende der beiden seitlichen Führungswände sind jeweils Vereinzelungsecklappen angebracht.It is also known from DE-AS 28 16 448 a device for feeding paper sheets for a writing office machine, which has a paper supply cassette, which consists of a rectangular trough-shaped housing and has a base plate and side walls. In parallel to the lateral side walls, guide walls are inserted into the cassette, which rest laterally on the paper stack. At the upper end of the guide walls, a pressure plate is pivoted near the base plate. The pressure plate rests on the back of a paper stack and is pressed into the open side of the housing by a compression spring which is inserted at the lower, freely pivotable end of the pressure plate between it and the base plate. Separating corner flaps are attached to the lower end of the two side guide walls.

Zum Abziehen der Einzelblätter von dem Papierstapel ist im Schwenkbereich der Anpreßplatte eine Vereinzelungsrolle vorgesehen, die von einem Motor angetrieben wird. Die Vereinzelungsrolle zieht jeweils nach unten die Einzelblätter von dem Stapel nach Überwinden der Vereinzelungsecklappen ab.A separating roller, which is driven by a motor, is provided in the swivel range of the pressure plate for pulling off the individual sheets from the paper stack. The separating roller pulls the single sheets down from the stack after overcoming the separating corner flaps.

Dieses Abziehen geschieht dadurch, daß die Vereinzelungsrolle das Papier nach unten gegen die Vereinzelungsecklappen aufwölbt und das Papier infolge seiner Eigenelastizität über die Vereinzelungsecklappen springt.This peeling takes place in that the singling roll bulges the paper down against the singling corner flaps and the paper jumps over the singling corner flaps due to its inherent elasticity.

Es hat sich nun herausgestellt, daß bei planen Papierstapeln die Vereinzelungsrolle eine sehr hohe Reibkraft ausüben muß um das Papier abzuziehen. Eine sehr hohe Andruckkraft verbunden mit einem hohen Reibwert an der Außenfläche der Vereinzelungsrolle führt nun dazu, daß die Gefahr besteht, daß mehr als ein Blatt vom Stapel abgezogen wird.It has now been found that in the case of flat stacks of paper the separating roller must exert a very high frictional force in order to pull the paper off. A very high pressure force combined with a high coefficient of friction on the outer surface of the singling roller now leads to the risk that more than one sheet is pulled off the stack.

Papierstapel haben außerdem die Eigenschaft, daß die Einzelblätter sehr dicht und völlig plan aufeinanderliegen, so daß bei Ausübung einer Tangentialkraft ausgehend von der Vereinzelungsrolle das Einzelblatt infolge des Selbstversteifungseffektes des Papieres nur schwer aus den Ecklappen gleitet.Stacks of paper also have the property that the single sheets lie very close together and completely flat, so that when a tangential force is exerted from the separating roller, the single sheet slides out of the corner tabs only with difficulty due to the self-stiffening effect of the paper.

In der US-A-38 57 558 wird eine Papiervorratskassette beschrieben, bei der am Boden der Kassette, in der Umgebung einer Vereinzelungswalze, ein den Papierstapel verwölbendes Distanzelement angeordnet ist. Zur Entnahme eines Einzelblattes wird zunächst mit Hilfe der Vereinzelungswalze ein Einzelblatt unter federnden, einen Rand des Papierstapels übergreifenden Ecklappen hervorgezogen. Nach Umkehr der Bewegungsrichtung der Vereinzelungswalze wird dann das Einzelblatt über die Ecklappen hinweggeschoben.In US-A-38 57 558 a paper supply cassette is described in which a spacer element which bulges the paper stack is arranged on the bottom of the cassette, in the vicinity of a separating roller. To remove a single sheet, first use the separating roller to pull out a single sheet under resilient corner tabs that overlap an edge of the paper stack. After reversing the direction of movement of the separating roller, the single sheet is then pushed over the corner tabs.

Aufgabe der Erfindung ist es, eine Papiervorratskassette für Druckeinrichtungen so auszugestalten, daß ein sicheres und leichtes Abziehen der Einzelblätter vom Papierstapel bis zum letzten Blatt des Papierstapels möglich ist. Das Abziehelement soll dabei mit möglichst geringer Andruckkraft auf den Papierstapel einwirken.The object of the invention is to design a paper supply cassette for printing devices so that a safe and easy removal of the individual sheets from the paper stack to the last sheet of the paper stack is possible. The pull-off element should act on the paper stack with as little pressure as possible.

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

Eine vorteilhafte Ausführungsform der Erfindung ist im Unteranspruch gekennzeichnet.An advantageous embodiment of the invention is characterized in the subclaim.

Dadurch, daß das Distanzelement aus einem keilförmigen Teil und einem sich daran anschließenden Distanzteil aus einem Material mit erhöhter Reibungskraft gegenüber Papier besteht, wird das Abziehen der Einzelblätter zusätzlich erleichtert. Der Papierstapel kann ohne Schwierigkeiten bis zum letzten Blatt vereinzelt werden. Der keilförmige Teil des Distanzelementes dient dabei zum leichteren Einführen des Papierstapels.The fact that the spacer consists of a wedge-shaped part and an adjoining spacer made of a material with increased frictional force compared to paper, the removal of the individual sheets is additionally facilitated. The paper stack can be separated to the last sheet without difficulty. The wedge-shaped part of the spacer element serves for easier insertion of the paper stack.

Die Gummischicht auf dem Distanzelement sorgt dafür, daß sämtliche Blätter von dem Papierstapel abgezogen werden können, ohne daß bei einer geringen Anzahl von Einzelblättern mehrere Einzelblätter auf einmal abgezogen werden.The rubber layer on the spacer element ensures that all sheets can be pulled off the paper stack without having to pull off several single sheets at a time with a small number of single sheets.

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

  • Fig. 1 eine schematische Schnittdarstellung der Papiervorratskassette und
  • Fig. 2 eine Ansicht der Papiervorratskassette von vorn.
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 supply cassette and
  • Fig. 2 is a view of the paper supply cassette from the front.

Eine Papiervorratskassette wie sie z. B. in der DE-AS 28 16 448 beschrieben wird, besteht aus einem rechteckigen wannenförmigen Gehäuse, daß vorzugsweise aus Kunststoff hergestellt ist und eine Bodenplatte B und Seitenwände S aufweist, die seitlich an dem Papierstapel anliegen. Am oberen Ende der Bodenplatte B ist eine Anpreßplatte AP schwenkbar über ein Gelenk GL angelenkt und wird durch eine Druckfeder DF die am unteren frei schwenkbaren Ende der Anpreßplatte AP zwischen dieser und der Bodenplatte B eingesetzt ist, gegen die offene Gehäuseseite gepreßt.A paper supply cassette as z. B. is described in DE-AS 28 16 448, consists of a rectangular trough-shaped housing that is preferably made of plastic and has a base plate B and side walls S which abut the side of the paper stack. At the upper end of the base plate B, a pressure plate AP is pivotally articulated via a joint GL and is pressed against the open housing side by a compression spring DF which is inserted at the lower freely pivotable end of the pressure plate AP between the latter and the base plate B.

Am Ende der beiden seitlichen Führungswände S ist jeweils ein Vereinzelungsecklappen VE angebracht. Dieser Vereinzelungsecklappen übergreift im Bereich der offenen Gehäuseseite entsprechend der Darstellung der Fig. 2 die unteren Ecken der Anpreßplatte AP und damit den zwischen der Anpreßplatte AP und den Vereinzelungslappen angeordneten Papierstapel. Etwas oberhalb der Vereinzelungsecklappen VE zwischen einer als Abziehelement dienenden Vereinzelungsrollen A und den Vereinzelungsecklappen "'VE sind auf der als Papierablage dienenden Anpreßplatte AP keilförmige Distanzelemente D angeordnet. Diese Distanzelemente D bestehen aus einem rechteckigen Gummiteil G mit daran nach oben anschließenden keilförmigen Teil K aus Kunststoff.At the end of the two lateral guide walls S, a separating corner flap VE is attached. This separating corner flap overlaps in the region of the open housing side, as shown in FIG. 2, the lower corners of the pressure plate AP and thus the paper stack arranged between the pressure plate AP and the separating flap. A little above the singling corner flaps VE between a singling roller A serving as a pulling element and the singling corner flaps "'VE, wedge-shaped spacing elements D are arranged on the pressure plate AP serving as a paper tray. These spacing elements D exist of a rectangular rubber part G with a wedge-shaped part K made of plastic adjoining it upwards.

Die Distanzelemente haben dabei die Aufgabe, den Papierstapel P zwischen den Vereinzelungsecklappen und der Vereinzelungsrolle A leicht vorzuwölben und damit eine Art Sollknickstelle zu bilden. Damit wird das Abziehen der Einzelblätter von den Papierstapel P mit Hilfe der in Pfeilrichtung betriebenen motorisch angetriebenen Vereinzelungsrolle A wesentlich erleichtert. Der aus Gummi bestehende Teil der Distanzelemente D hält dabei den Papierstapel an seiner Rückseite fest, so daß über die Vereinzelungsrolle sicher jeweils nur ein Einzelblatt abgezogen wird.The spacer elements have the task of slightly bulging the paper stack P between the singling corner flaps and the singling roll A and thus forming a kind of predetermined kink. This makes it much easier to pull off the individual sheets from the paper stack P with the aid of the motorized separating roller A operated in the direction of the arrow. The rubber part of the spacer elements D holds the paper stack on its back, so that only a single sheet is safely removed from the separating roller.

Claims (2)

1. Paper supply holder for printing mechanisms having a depositing surface (AP) for receiving a stack of single sheets which is arranged resiliently between the depositing surface and the separation corner tabs (VE) covering the lower corners, and in which the single sheets are drawn off singly from the stack with the aid of a drawing-off element (A) after overcoming the separation corner tabs (VE), a distance element (D) which slightly protrudes from the paper stack (P) relative to the separation corner tabs (VE) being arranged between the separation corner tabs (VE) and the drawing-off element (A), characterized in that the distance element consists of a cuneiform part (K) and of an adjoining distance part (G) made of a material with a greater frictional force than paper.
2. Paper supply holder according to Claim 1, characterized in that the cuneiform part (K) is made of plastic and the distance part (G) is made of rubber.
EP85108298A 1984-07-09 1985-07-04 Paper supply holder for printing mechanisms having distance elements arranged on the depositing surface Expired EP0167988B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3425234 1984-07-09
DE3425234 1984-07-09

Publications (3)

Publication Number Publication Date
EP0167988A2 EP0167988A2 (en) 1986-01-15
EP0167988A3 EP0167988A3 (en) 1986-07-16
EP0167988B1 true EP0167988B1 (en) 1989-03-15

Family

ID=6240185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108298A Expired EP0167988B1 (en) 1984-07-09 1985-07-04 Paper supply holder for printing mechanisms having distance elements arranged on the depositing surface

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EP (1) EP0167988B1 (en)
DE (1) DE3568732D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0315487B1 (en) * 1987-11-06 1993-05-12 Victor Company Of Japan, Limited Cartridge for a printer system
US5015109A (en) * 1989-11-24 1991-05-14 Eastman Kodak Company Sheet feed construction for compact printers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857558A (en) * 1973-06-21 1974-12-31 Xerox Corp Paper cassette design with irregular bottom
US4325626A (en) * 1978-12-13 1982-04-20 Mita Industrial Co., Ltd. Electrostatic copying apparatus
DE3247341A1 (en) * 1982-12-17 1984-06-20 Mannesmann AG, 4000 Düsseldorf DEVICE FOR INPUTING SINGLE SHEETS FROM A STACK OF SHEETS

Also Published As

Publication number Publication date
EP0167988A3 (en) 1986-07-16
EP0167988A2 (en) 1986-01-15
DE3568732D1 (en) 1989-04-20

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