EP0434232B1 - Agencement d'alimentation en papier - Google Patents

Agencement d'alimentation en papier Download PDF

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Publication number
EP0434232B1
EP0434232B1 EP19900312768 EP90312768A EP0434232B1 EP 0434232 B1 EP0434232 B1 EP 0434232B1 EP 19900312768 EP19900312768 EP 19900312768 EP 90312768 A EP90312768 A EP 90312768A EP 0434232 B1 EP0434232 B1 EP 0434232B1
Authority
EP
European Patent Office
Prior art keywords
paper
belt
pick
zone
hopper
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
EP19900312768
Other languages
German (de)
English (en)
Other versions
EP0434232A2 (fr
EP0434232A3 (en
Inventor
Larry A. Jackson
Steve O. Rasmussen
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of EP0434232A2 publication Critical patent/EP0434232A2/fr
Publication of EP0434232A3 publication Critical patent/EP0434232A3/en
Application granted granted Critical
Publication of EP0434232B1 publication Critical patent/EP0434232B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/04—Endless-belt separators
    • B65H3/047—Endless-belt separators separating from the top of a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52—Friction retainers acting on under or rear side of article being separated
    • B65H3/5207—Non-driven retainers, e.g. movable retainers being moved by the motion of the article
    • B65H3/5215—Non-driven retainers, e.g. movable retainers being moved by the motion of the article the retainers positioned under articles separated from the top of the pile
    • B65H3/5223—Retainers of the pad-type, e.g. friction pads

Definitions

  • This invention relates to a paper-feed arrangement for incorporation into the structure of a printer and the like.
  • paper used herein in the specification and claims is intended to mean and embrace any functionally similar sheet-like printing medium.
  • a general and important aim of the present invention is to provide a novel paper-feed arrangement which addresses these two issues in ways which offer some significant advances.
  • a paper-feed arrangement with a reduced overall depth for incorporation in a printer and the like comprising: paper-storage hopper structure including a discharge zone enabling picking of the top sheet of paper in a stack in the hopper, and a broad-expanse, power driven, travelling pick belt disposed adjacent said discharge zone trained around a drive roller displaced laterally downstream from said zone and an idler roller disposed over the zone operable, with paper stored in said hopper structure to pick such paper through the action of generally rectangular, broad-area facial contact with the same, characterised in that the drive roller has one diameter and said idler roller has another diameter which is a small fraction of said one diameter, said pick belt, where it is trained over said drive roller, vertically spanning an extent which straddles the plane containing such a top sheet, and where it is trained over said idler roller, spanning a vertical extent which is a small fraction of said first-mentioned extent.
  • an overall "vertical" depth, from the upper run of the belt structure to the base of the hopper, is achieved which is significantly less than that achieved in prior art arrangements where relatively high-profile pick roller structure is employed overlying the discharge end of a hopper.
  • broad-expanse, essentially rectangular, facial contact with a sheet of paper enhances picking reliability.
  • an expanse of frictioning material such as cork, which faces a run in the overlying belt structure.
  • the materials chosen for the belt structure (plural belts) and for the frictioning expanse are such that the coefficient of friction expected between the belt and paper exceeds that expected between paper and the frictioning expanse, with the latter coefficient of friction exceeding that expected between two contacting sheets of paper.
  • a consequence of this construction is that what might be thought of as a differentiated friction separation zone exists immediately downstream from the discharge end of a hopper, wherein, should more than one sheet of paper be picked initially from the hopper, a separation will occur, with the result that only the top sheet will actually travel into the downstream intended paper path.
  • FIG. 1 is included herein to provide an illustration of a typical setting wherein the arrangement proposed by the present invention has particular utility.
  • this perspective view illustrates a conventional ink-jet, computer-driven printer 8 in which, as will be explained, the components of the present invention are incorporated.
  • a paper-feed arrangement incorporated in printer 8, and constructed in accordance with the present invention. Included are a paper-storage hopper structure, or hopper, 12 (Fig. 2) including a discharge zone shown generally at 12 a . Hopper 12 and its discharge zone are, essentially, conventional in construction. Shown stored as a stack in hopper 12 is a collection of sheets of paper 14 ready to be picked and fed for printing in the printer.
  • a ramp structure 16 Located downstream from discharge zone 12 a is a ramp structure 16 on the upper surface of which is suitably attached an expanse of cork 18, which is also referred to herein as frictioning means.
  • Driving the belts during a picking/feeding operation is an elongate drive roller 28 which closely overties ramp structure 16 some distance downstream from discharge zone 12 a .
  • This drive roller is positioned in such a manner that the undersides of runs of the belts extending from the base of the drive roller directly overlie and tend to contact the top surface of cork expanse 18. This region is referred to herein as a separation zone.
  • the drive roller and idler configured and relatively sized as shown it should be apparent that the overall height of the entire structure including the drive rollers and the hopper structure can be held to a minimum. And this, of course, is considered to be an important advantage. For example, reducing the height referred to allows for the offering of a very compact printer structure wherein two paper storage hoppers for handling different sizes of paper can be employed. Alternatively, other elements may be employed with a single hopper or the printer may simply be shorter.
  • the material chosen for the belts typically natural rubber, and that, typically cork, chosen for the frictioning expanses which underlie the belts where they extend over the ramp structure, have been chosen to provide a special differentiated coefficient of friction situation which further leads to enhanced picking and feeding reliability (one sheet at a time).
  • Fig. 4 there is illustrated a situation where, with operation of the belts, three sheets of paper have initially been picked from the stack in the hopper.
  • the differentiated coefficient of friction consideration just mentioned is one wherein the expected coefficient of friction between the contacting faces of two sheets of paper is less than that expected between the face of a sheet of paper and cork expanses 18, with the latter being less than that coefficient of friction which is expected between the belts and the face of a sheet of paper.
  • the paper/paper coefficient of friction is also referred to herein as PP, that between paper and cork expanses 18 as PF, and that between the belts and paper as PB.
  • the above-described invention is applicable to any situation where paper is being picked and fed into a device such as a printer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Claims (3)

  1. Agencement d'alimentation en papier présentant une profondeur globale réduite prévu pour une incorporation dans une imprimante (8) et autre, comprenant :
       une structure de réserve de stockage de papier (12) incluant une zone de décharge (12a) permettant la saisie de la feuille de papier supérieure (14) dans une pile placée dans la réserve ; et
       une courroie de saisie mobile entraînée par moteur à large plage (20, 22, 24) disposée de manière à être adjacente à ladite zone de décharge (12a) entraînée autour d'un rouleau d'entraînement (28) déplacé latéralement en aval par rapport à ladite zone (12a) et par un galet fou (26) disposé sur la zone (12a) qui fonctionne, tandis que le papier (14) est stocké dans ladite structure de réserve (12), pour saisir ce papier par l'intermédiaire de l'action d'un contact facial sur une zone large généralement rectangulaire avec celui-ci, caractérisé en ce que le rouleau d'entraînement (28) présente un certain diamètre et ledit galet fou (26) présente un autre diamètre qui est une faible fraction dudit premier diamètre, ladite courroie de saisie (20, 22, 24), dans sa partie qui est entraînée sur ledit rouleau d'entraînement (28), s'étend verticalement sur une étendue qui englobe le plan contenant une telle feuille supérieure (14), et dans sa partie qui est entraînée sur ledit galet fou (26), s'étend sur une étendue verticale qui est une faible fraction de ladite première étendue mentionnée.
  2. Agencement selon la revendication 1, comprenant en outre une extension fixe de moyens de friction (18) qui fait face à une portion de ladite courroie (20, 22, 24) en aval de ladite zone de décharge (12a), conçue pour un contact facial avec une feuille de papier (14) saisie par la courroie de saisie (20, 22, 24).
  3. Agencement selon la revendication 2, lequel est conçu de telle sorte que les coefficients de friction nominaux que l'on s'attend à voir exister entre le papier et la courroie PB, entre le papier et le papier PP ainsi qu'entre le papier et le moyen de frottement PF sont différents, PF étant supérieur à PP et PB étant supérieur à PF.
EP19900312768 1989-12-18 1990-11-23 Agencement d'alimentation en papier Expired - Lifetime EP0434232B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45466189A 1989-12-18 1989-12-18
US454661 1999-12-03

Publications (3)

Publication Number Publication Date
EP0434232A2 EP0434232A2 (fr) 1991-06-26
EP0434232A3 EP0434232A3 (en) 1991-12-11
EP0434232B1 true EP0434232B1 (fr) 1995-07-26

Family

ID=23805550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900312768 Expired - Lifetime EP0434232B1 (fr) 1989-12-18 1990-11-23 Agencement d'alimentation en papier

Country Status (3)

Country Link
EP (1) EP0434232B1 (fr)
JP (1) JPH06191660A (fr)
DE (1) DE69021184T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2112279C1 (ru) * 1993-08-02 1998-05-27 Акционерное общество открытого типа НИИ точной механики Машина для счета банковских билетов

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5430664A (en) * 1992-07-14 1995-07-04 Technitrol, Inc. Document counting and batching apparatus with counterfeit detection

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE979C (de) * 1877-09-17 J. CUMMING in Edinburgh Einrichtungen an Rastrir-Apparaten und dazu gehörigen Papierblatt-Trennungs- und Zuführungs-Apparaten, welche letztere auch für andere Maschinen anwendbar sind
US1976788A (en) * 1933-03-21 1934-10-16 Kurth Herman Machine for delivering sheets from a stack
US4312503A (en) * 1980-05-27 1982-01-26 Xerox Corporation Spring-loaded friction retard separator
US4431175A (en) * 1982-03-08 1984-02-14 Mead Corporation Floating belt friction feeder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2112279C1 (ru) * 1993-08-02 1998-05-27 Акционерное общество открытого типа НИИ точной механики Машина для счета банковских билетов

Also Published As

Publication number Publication date
JPH06191660A (ja) 1994-07-12
DE69021184D1 (de) 1995-08-31
EP0434232A2 (fr) 1991-06-26
EP0434232A3 (en) 1991-12-11
DE69021184T2 (de) 1995-12-07

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