EP0167988A2 - 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
EP0167988A2
EP0167988A2 EP85108298A EP85108298A EP0167988A2 EP 0167988 A2 EP0167988 A2 EP 0167988A2 EP 85108298 A EP85108298 A EP 85108298A EP 85108298 A EP85108298 A EP 85108298A EP 0167988 A2 EP0167988 A2 EP 0167988A2
Authority
EP
European Patent Office
Prior art keywords
paper
stack
paper supply
supply cassette
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.)
Granted
Application number
EP85108298A
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German (de)
French (fr)
Other versions
EP0167988B1 (en
EP0167988A3 (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.
  • Paper supply cassettes of the type mentioned are generally known and have been used with success.
  • 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 pivotally hinged 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 flaps 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 is possible.
  • the pull-off element should act on the paper stack with as little pressure as possible.
  • the paper stack are arranged slightly bulging spacer elements relative to the singling corner flaps, there is a slight deformation of the paper sheet in the immediate vicinity of the pull-off element, namely after the pull-off element in the pull-off direction.
  • This protrusion makes it possible to pull off the single sheet using the pull-off element, e.g. a separation role can be much easier. Self-stiffening of the individual sheets, which makes pulling off with the separating roller difficult, can no longer occur due to this forced bulging.
  • the spacer elements are wedge-shaped and at least that part of the spacer elements which is in contact with the paper stack is made of a material with increased frictional force compared to paper, e.g. Trains rubber.
  • the wedge-shaped part of the spacer elements 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 e.g. is described in DE-AS 28 16 448, consists of a rectangular trough-shaped housing that is preferably made of plastic and has a bottom plate B and side walls S, which lie laterally on 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. In the region of the open side of the housing, this separating flap overlaps the lower corners of the pressure plate AP and thus the paper stack arranged between the pressure plate AP and the separating flaps in the region of the illustration in FIG. 2.
  • wedge-shaped spacing elements D are arranged on the pressure plate AP serving as a paper tray. These spacer elements D consist 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 the Separation roll is safely pulled off only one single sheet at a time.

Landscapes

  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

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.

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.

Papiervorratskassetten der eingangs genannten Art sind allgemein bekannt und mit Erfolg zur Anwendung gelangt.Paper supply cassettes of the type mentioned are generally known and have been used with success.

So Ist 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.From DE-AS 28 16 448 a device for feeding paper sheets for a writing office machine is known, 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 pivotally hinged 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 Uberwinden 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 flaps with difficulty due to the self-stiffening effect of the paper.

Aufgabe der Erfindung ist es, eine Papiervorratskassette für Druckeinrichtungen so auszugestalten, daß ein sicheres und leichtes Abziehen der Einzelblätter vom Papierstapel 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 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.

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

Dadurch, das etwas oberhalb der Vereinzelungsecklappen zwischen den Vereinzelungsecklappen und dem Abziehelement, den Papierstapel relativ zu den Vereinzelungsecklappen leicht vorwölbende Distanzelemente angeordnet sind, ergibt sich eine geringe Verformung des Papierblattes in umittelbarer Umgebung des Abziehelementes und zwar in Abziehrichtung dem Abziehelement nachgeordnet.Due to the fact that something above the singling corner flaps between the singling corner flaps and the pulling element, the paper stack are arranged slightly bulging spacer elements relative to the singling corner flaps, there is a slight deformation of the paper sheet in the immediate vicinity of the pull-off element, namely after the pull-off element in the pull-off direction.

Durch diese Vorwölbung wird das Abziehen des Einzelblattes mit Hilfe des Abziehelementes, daß z.B. eine Vereinzelungsrolle sein kann, wesentlich erleichtert. Eine das Abziehen mit der Vereinzelungsrolle erschwerende Selbstversteifung der Einzelblätter kann durch diese zwangsweise Vorwölbung nicht mehr auftreten.This protrusion makes it possible to pull off the single sheet using the pull-off element, e.g. a separation role can be much easier. Self-stiffening of the individual sheets, which makes pulling off with the separating roller difficult, can no longer occur due to this forced bulging.

Eine besonders gute Wirkung tritt auf, wenn man die Distanzelemente keilförmig ausbildet und mindestens den an den Papierstapel anliegenden Teil der Distanzelemente aus einem Material mit erhöhter Reibungskraft gegenüber Papier z.B. Gummi ausbildet. Der keilförmige Teil der Distanzelemente dient dabei zum leichteren Einführen des Papierstapels.A particularly good effect occurs if the spacer elements are wedge-shaped and at least that part of the spacer elements which is in contact with the paper stack is made of a material with increased frictional force compared to paper, e.g. Trains rubber. The wedge-shaped part of the spacer elements 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 Gehäuseeite gepreßt.A paper supply cassette as e.g. is described in DE-AS 28 16 448, consists of a rectangular trough-shaped housing that is preferably made of plastic and has a bottom plate B and side walls S, which lie laterally on 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 Vereinzelungseeklappen 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. In the region of the open side of the housing, this separating flap overlaps the lower corners of the pressure plate AP and thus the paper stack arranged between the pressure plate AP and the separating flaps in the region of the illustration in FIG. 2. 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 spacer elements D consist 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 the Separation roll is safely pulled off only one single sheet at a time.

Claims (3)

1. Papiervorratskassette für Druckeinrichtungen mit einer Ablagefläche zur Aufnahme eines Stapels von Einzelblättern, der federnd zwischen der Ablagefläche und die unteren Ecken überdeckende Vereinzelungslappen angeordnet Ist und bei der die Einzelblätter mit Hilfe eines Abziehelementes einzeln nach unten von dem Stapel nach Überwinden Vereinzelungsecklappen abgezogen werden,
da durch gekennzeichne t , daß etwa zwischen den Vereinzelungsecklappen (VE) und dem Abziehelement (A) mindestens ein den Papierstapel (P) relativ zu den Vereinzelungecklappen (VE) leicht vorwölbendes Distanzelement (D) angeordnet ist.1. paper supply cassette for printing devices with a storage area for receiving a stack of single sheets, which is arranged resiliently between the storage area and the lower corners covering separation tabs and in which the single sheets are pulled off individually from the stack after overcoming isolation corner tabs with the aid of a pulling element,
since by marked t that between the separating corner flaps (VE) and the pulling element (A) at least one the paper stack (P) relative to the separating corner flaps (VE) slightly bulging spacer element (D) is arranged. 2. Papiervorratskassette nach Anspruch 1,
dadurch gekennzeichnet, daß die Distanzelemente (D) keilförmig ausgebildet sind.2. paper supply cassette according to claim 1,
characterized in that the spacer elements (D) are wedge-shaped. 3. Papiervorratskassette nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, daß mindestens der an dem Papierstapel (P) anliegende Teil der Distanzelemente (D) aus einem Material mit erhöhter Reibungskraft gegenüber Papier z. B. Gummi besteht.3. paper supply cassette according to one of claims 1 or 2,
characterized in that at least the part of the spacer elements (D) lying against the paper stack (P) made of a material with increased frictional force compared to paper, e.g. B. 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 true EP0167988A2 (en) 1986-01-15
EP0167988A3 EP0167988A3 (en) 1986-07-16
EP0167988B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0315487A2 (en) * 1987-11-06 1989-05-10 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

Citations (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
GB2104489A (en) * 1978-12-13 1983-03-09 Mita Industrial Co Ltd Electrostatic copying apparatus
EP0112276A2 (en) * 1982-12-17 1984-06-27 MANNESMANN Aktiengesellschaft Device for feeding single sheets from a pile of sheets

Patent Citations (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
GB2104489A (en) * 1978-12-13 1983-03-09 Mita Industrial Co Ltd Electrostatic copying apparatus
EP0112276A2 (en) * 1982-12-17 1984-06-27 MANNESMANN Aktiengesellschaft Device for feeding single sheets from a pile of sheets

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, Band 23, Nr. 3, August 1980, Seiten 947, 948, New York, US; R.W. GUNNELL "Pre-buckle forming back-up plate for supply cassette" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0315487A2 (en) * 1987-11-06 1989-05-10 Victor Company Of Japan, Limited Cartridge for a printer system
EP0315487A3 (en) * 1987-11-06 1990-05-30 Victor Company Of Japan, Limited Cartridge for a printer system
US5005998A (en) * 1987-11-06 1991-04-09 Victor Company Of Japan, Ltd. Cartridge for a printer system
US5015109A (en) * 1989-11-24 1991-05-14 Eastman Kodak Company Sheet feed construction for compact printers

Also Published As

Publication number Publication date
EP0167988B1 (en) 1989-03-15
DE3568732D1 (en) 1989-04-20
EP0167988A3 (en) 1986-07-16

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