US3425685A - Paper feed mechanism - Google Patents

Paper feed mechanism Download PDF

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Publication number
US3425685A
US3425685A US605045A US3425685DA US3425685A US 3425685 A US3425685 A US 3425685A US 605045 A US605045 A US 605045A US 3425685D A US3425685D A US 3425685DA US 3425685 A US3425685 A US 3425685A
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United States
Prior art keywords
sheet
roller
stack
feed
paper
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
US605045A
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English (en)
Inventor
Robert H Liva
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Application granted granted Critical
Publication of US3425685A publication Critical patent/US3425685A/en
Anticipated expiration legal-status Critical
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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
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0623—Rollers or like rotary separators acting at least during a part of each separation cycle on the articles in a direction opposite to the final separating direction

Definitions

  • This invention relates to paper handling devices and, in particular, to a sheet paper feeding mechanism that is adapted to feed sheets seriatirn either from the top of a stack of paper or from the [bottom of the stack.
  • sheet separating and feeding apparatus which are capable of high speed are relatively complicated, requiring a complexity of moving linkages or suction cups that limit the orientation of a paper stack in a using machine to which the separating and feeding apparatus is applied.
  • the operation of these apparatus usually are restricted to the top plane of a paper stack and, therefore, are limited to top loading use.
  • the complexity and intricate design specification of these apparatus limits the adaptability or flexibility of these apparatus as bottom or side feeders as well as a top feeder apparatus.
  • Another object of the invention is to improve paper feeding operation by arranging feed means which are capable of variable control from Zero output to operations up to the speed of 200 sheets per minute or more.
  • the pair of feed rollers are arranged to move in unison in a reciprocatory motion toward and away from the top plane of the stack and normal thereto.
  • the feed rollers are adapted to rotate in opposite directions and preferably one is made to drive the other.
  • the lower roller of the pair drives the leading edge thereof toward the rear of the stack and with the top sheet being restrained against movement to the rear by the restraining roller, a fold or bend in the top sheet is formed between the restraining roller and the lower feed roller. This action will cause the leading edge of the top sheet to be grasped by the high frictional material of the bottom feed roller and to be carried to the nip between the feed rollers as aforesaid.
  • Another embodiment of the invention results in the separation and feeding of the bottommost sheets of a stack of sheet material.
  • the stack is supported by a forwardmost support roller and half-tray bottom plate or a plurality of rollers.
  • the restraining roller and the feed rollers perform the same action as the previously described embodiment for producing a bend in the lowermost sheet and to carry the forward edge thereof to the nip of the two feed rollers whereupon the sheet is pulled in a positive manner by the two feed rollers.
  • FIGURE 1 is a schematic view of a sheet separating and feeding mechanism in accordance with the present invention
  • FIGURE 2 is a schematic illustration showing a feed separating roller and the feed rollers in one stage of operation
  • FIGURE 3 is a schematic illustration similar to FIG- URE 2 showing the feed mechanism is still another stage of operation.
  • FIGURE 4 is a schematic illustration of another embodiment of paper separating and feed mechanism in accordance with the present invention arranged to feed the Ibottommost of a stack of sheet material.
  • FIGURES l, 2, and 3 there is shown a stack 10 of sheet material arranged for a paper handling function in a paper tray indicated by reference 11.
  • the paper tray 11 may be combined with a suitable paper level control in order to maintain the top of stack 10 at a predetermined height or, at least to within the thicknesses of a few sheets of paper.
  • a restraining roller 12 placed in contact with the topmost sheet of the stack is a restraining roller 12 supported on a shaft by any suitable means for maintaining the roller at the predetermined height such that the periphery of the roller remains continuously in contact with the topmost sheet.
  • the roller is mounted freely for rotation in one direction and may be rotated when the topmost sheet is pulled out in a forward direction and, is held against rotation in the opposite direction or that direction which a force may tend to drive the top sheet toward the rear of the stack.
  • the shaft supporting the roller 12 may be provided with a one Way clutch to permit uni-directional rotation of the roller.
  • a pair of feed rollers 14 and 15 journaled for rotation in a frame 16 which is mounted for reciprocable movement in a vertical plane or in directions normal to the plane of the topmost sheet of the stack.
  • This movement of the rollers 14 and 15 is accomplished by a solenoid 17 mechanically coupled to the frame 16.
  • the vertical reciprocable movement of the frame 16 and, consequently, the rollers 14 and 15 is very slight, a matter of a few thicknesses of paper and may be produced by the solenoid 17 in one direction and a suitable spring or by gravity in the other direction.
  • a control device 18 is connected to the solenoid 17 for controlling periodic energization thereof and therefore the vertical movements of the frame 16. It is to be realized also that other modifications such as the use of rotary cams instead of a solenoid for effecting periodic movement of the feed roller frames will readily occur to those skilled in the art and such modifications are intended to be included herewith.
  • the peripheries of the lower feed roller 14 and the upper roller 15 are made of relatively high-friction material, such as soft rubber composition and are held in driving cooperation by the frame 16.
  • a motor is mechanically coupled to the feed rollers in order to produce rotation thereof thereby producing clockwise rotation of the lower feed roller 14, which serves as a separating roller for the first stage of its operation and, counterclockwise rotation of the upper feed roller 16.
  • the motor 19 remains continuously energized in order to produce continuous rotation of the feed rollers 14 and 15.
  • the control device 18 may be a timing circuit for producing periodic energization of the solenoid 17 in order to produce corresponding reciprocal movement of the feed rollers in a vertical direction whereby at its lower point of movement the lower roller 14 is in light pressure contact with the topmost sheet of the stack and at its uppermost point of travel the lower feed roller 14 rises a few paper thicknesses above the topmost sheet in order to be out of contact with the next top sheet when the one being acted upon has been pulled from below the roller.
  • the bend or fold produced in the topmost sheet has the effect of producing a slight spring force upon the leading edge thereof and with the leading edge pulled back from the point where the sheet was tangent to the lower roller results in the leading edge adhering to the high frictional material comprising the periphery of the roller 14.
  • the frame 16 is moved upwardly by the solenoid 17 to raise the lower roller 14 away from the stack in order to prevent this roller from coming in contact with the next sheet of the stack prematurely before the sheet S 'is able to be separated from the stack.
  • the forward edge E of the sheet S is carried upwardly by the continual rotation of the roller 14 toward the nip of the two rollers 14 and 15.
  • the leading edge is in the nip, it is diven positively by the two feed rollers with a relatively great force, more or less, a snap-action movement, in order to accomplish relatively fast movement of the sheet at this point.
  • the sheet S is shown being fed by the rollers 14 and 15 in order to present the sheet to the next stage of paper handling which, for example, may be a paper transport mechanism or the rotary drum of a duplicating or reproduction machine.
  • the shaft carrying the roller 12 includes a one-way clutch so that the pull upon the sheet S by the rollers 14 and 15 will produce rotation of the roller 12 and thereby eliminate the possibility of a retarding force being effective upon a sheet being fed.
  • the paper stack 10 is shown in a paper tray 20 comprising a bottom half shelf 21 adapted to support, more or less, the rear half of the stack area and a forward wall 22 to prevent inadvertent slippage of the papers in the stack in a forward direction.
  • a paper tray arrangement may be utilized, such as a plurality of rollers instead of the shelf 21, which will permit an open exposure of the lower portions of the paper stack.
  • a support roller 23 suitably journaled in the machine frame that utilizes the paper feeding mechanism.
  • Separation and feeding of the lowermost sheet S is effected by a restraining roller 24 mounted for rotation below the stack 10 and an upper feed roller 26 engageable with the forward end of the stack of sheets.
  • the roller 24 cooperates with the upper feed roller 26 in the same way that the feed roller 14 cooperates with the roller 12 and, is mounted for rotation in a frame 27 which also carries a lower feeding roller 28 journaled therein.
  • the top feeder roller 26 is driven in a counterclockwise direction by a motor 25 and cooperates with the roller 24 to form a fold or bend in the sheet S.
  • the forward edge of the sheet S is gripped by the highly frictional composition of the roller 26 in order to carry the forward edge of the sheet into the nip between the rollers 26 and 28.
  • the sheet S is pulled at a fast rate across the bottom of the plate 21 and feeds the sheet from the bottom of the stack.
  • the restraining roller 24 is provided with a slip clutch in order to permit overriding thereof when the sheet S is pulled by the rollers 26 and 28.
  • the frame 27 and consequentially the feeder rollers 26 and 28 are actuated generally in a direction normal to the plane of the sheets in the stack 10 by a solenoid 29 which is connected to a control device 30 for imparting timed, periodic reciprocatory motion to the frame 27.
  • FIGURE 4 The operation of the embodiment of FIGURE 4 is exactly the same as the embodiment of FIGURES 1, 2 and 3 in that the adjacent feed roller 26 and the restraining roller 24, when the former is actuated by the solenoid 29 into engagement with the lowermost sheet of the stack, cooperates with the roller 24 to produce a fold or bend in the sheet S.
  • the speed of paper feeding for either embodiment of the invention may be varied by controlling the frequency of the periodic motion of the frames 16 or 27, in fact, the rate of reciprocatory motion imparted to the frames 16 and 27 is a direct function of the rate of paper feed.
  • the adjacent feed roller which in the embodiment of FIGURES l-3 is the roller 14, and in the embodiment of FIGURE 4, the roller 26, a sheet will be fed from the stack to which the feed roller is applied.
  • Suitable control means may be utilized to control, say by manually actuating a knob, for conditioning the apparatus for paper feed operation at the rate of anywhere from 0 feed rate to 200 sheets per minute, or more.
  • Sheet handling apparatus comprising: 5 roller and cause the edge to be carried to said nip a sheet handling device adapted to support a stack of to be advanced by said feed rollers out of the stack of sheets to be fed therefrom in a fixed plane, h ts,
  • a sheet restraining mechanism having an element ena frame t t bl Supporting id f d toners
  • said control means having an actuator device responsive and arranged restram each of the sheets agaulst to discrete electrical signals operatively connected to movement in said plane parallel to the other sheets in the frame to impart reciprocatory movement 0f the the stack and in a direction toward the rearward end frame relative to Said plane, of.the Stack
  • said sheet restraining element comprises a roller rotataa pair of feed rollers arranged transversely of the stack bl 1 h t f f d with their axes parallel and being driven for advance on y m a Opp 081 e t a o Sal ee ing a sheet when in the nip therebetween, one of said roller rollers being rotatalble in a direction to produce rear- References Cited Ward movement of a sheet in said plane, when in engagement therewith UNITED STATES control means operatively connected with said pair of 734 172 7 1903 Hamilton 271 23 nollers for periodically moving

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Pile Receivers (AREA)
US605045A 1966-12-27 1966-12-27 Paper feed mechanism Expired - Lifetime US3425685A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60504566A 1966-12-27 1966-12-27

Publications (1)

Publication Number Publication Date
US3425685A true US3425685A (en) 1969-02-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
US605045A Expired - Lifetime US3425685A (en) 1966-12-27 1966-12-27 Paper feed mechanism

Country Status (6)

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US (1) US3425685A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE708498A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1611419A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1552327A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1165279A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6717549A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4922148B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1969-10-14 1974-06-06
US3989237A (en) * 1975-05-05 1976-11-02 International Business Machines Corporation Variable force sheet feeding mechanism
DE3336662C1 (de) * 1983-10-08 1985-02-28 Beck & Co Packautomaten, 7440 Nürtingen Vorrichtung zum Vereinzeln von textilen Stofflagen
US4677778A (en) * 1983-01-07 1987-07-07 Canon Kabushiki Kaisha Sheet manipulating apparatus
US4981235A (en) * 1988-03-28 1991-01-01 Targa Industries, Inc. Unitary coupon dispenser
US4991831A (en) * 1989-08-14 1991-02-12 Green Ronald J Paper sheet feeding apparatus
US5143365A (en) * 1989-08-14 1992-09-01 Green Ronald J Paper sheet feeding apparatus
US5303910A (en) * 1992-09-10 1994-04-19 Tice Engineering & Sales, Incorporated Pick-up means for use with limp sheet material
US5377969A (en) * 1991-09-24 1995-01-03 Steinhilber; Friedhelm Method and device for separating sheet-type recording media
US5622361A (en) * 1995-04-27 1997-04-22 Ark, Inc. Method of and apparatus for separating and feeding workpieces of limp material from a stack thereof
US5630581A (en) * 1996-01-05 1997-05-20 Rodesch Associates, Inc. Apparatus for dispensing lightweight sheet-style articles from a stacked supply of articles
DE19648360A1 (de) * 1996-11-22 1998-06-04 Rovema Gmbh Vorrichtung und Verfahren zum Erkennen einer Lagenstärke oder einer Anzahl von Lagen von Verpackungszuschnitten
EP1053962A3 (en) * 1999-05-11 2001-09-19 Mars Incorporated Flexible media dispenser
US20080063457A1 (en) * 2006-09-11 2008-03-13 Seiko Epson Corporation Sheet Bundle Printer and Method of Controlling Sheet Bundle Printer
US9345368B2 (en) 2014-05-19 2016-05-24 Sca Hygiene Products Ab Paper product dispenser and related methods
US20180253053A1 (en) * 2017-03-02 2018-09-06 Kabushiki Kaisha Toshiba Paper feed apparatus and image forming apparatus
US10980377B1 (en) 2019-12-18 2021-04-20 Essity Hygiene And Health Aktiebolag Apparatus and methods for paper dispensing
US11116365B2 (en) 2019-12-18 2021-09-14 Essity Hygiene And Health Aktiebolag Horizontally oriented paper product dispenser and related methods

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2319557A2 (fr) * 1975-07-31 1977-02-25 Transac Dev Transact Automat Procede et dispositif de distribution, une a une, de feuilles empilees en liasses
DE2539200A1 (de) * 1975-09-03 1977-03-17 Geimuplast Mundt Kg Peter Verfahren zum zufuehren von gegenstaenden sowie vorrichtung zum durchfuehren eines solchen verfahrens
EP0047542B1 (en) * 1980-09-08 1984-11-28 Agfa-Gevaert N.V. Dispenser for dispensing photographic sheets from a stack
DE3520890A1 (de) * 1985-06-11 1986-12-11 Alois Zettler Elektrotechnische Fabrik GmbH, 8000 München Vorrichtung zum abziehen von blaettern von einem blattstapel
DE10101563A1 (de) 2001-01-15 2002-08-01 Wincor Nixdorf Gmbh & Co Kg Vorrichtung zur Abgabe oder Entgegennahme von Einzelblättern
CN114537804B (zh) * 2022-03-28 2025-02-18 国药集团同济堂（贵州）制药有限公司 一种小册子分页装置和方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US734172A (en) * 1903-07-21 Stenciling or printing machine
US3325164A (en) * 1965-05-26 1967-06-13 Frederick Post Co Hold-down structure for sheet-feeding apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US734172A (en) * 1903-07-21 Stenciling or printing machine
US3325164A (en) * 1965-05-26 1967-06-13 Frederick Post Co Hold-down structure for sheet-feeding apparatus

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4922148B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1969-10-14 1974-06-06
US3989237A (en) * 1975-05-05 1976-11-02 International Business Machines Corporation Variable force sheet feeding mechanism
US4677778A (en) * 1983-01-07 1987-07-07 Canon Kabushiki Kaisha Sheet manipulating apparatus
DE3336662C1 (de) * 1983-10-08 1985-02-28 Beck & Co Packautomaten, 7440 Nürtingen Vorrichtung zum Vereinzeln von textilen Stofflagen
US4981235A (en) * 1988-03-28 1991-01-01 Targa Industries, Inc. Unitary coupon dispenser
US4991831A (en) * 1989-08-14 1991-02-12 Green Ronald J Paper sheet feeding apparatus
US5143365A (en) * 1989-08-14 1992-09-01 Green Ronald J Paper sheet feeding apparatus
US5377969A (en) * 1991-09-24 1995-01-03 Steinhilber; Friedhelm Method and device for separating sheet-type recording media
US5303910A (en) * 1992-09-10 1994-04-19 Tice Engineering & Sales, Incorporated Pick-up means for use with limp sheet material
US5622361A (en) * 1995-04-27 1997-04-22 Ark, Inc. Method of and apparatus for separating and feeding workpieces of limp material from a stack thereof
US5630581A (en) * 1996-01-05 1997-05-20 Rodesch Associates, Inc. Apparatus for dispensing lightweight sheet-style articles from a stacked supply of articles
DE19648360A1 (de) * 1996-11-22 1998-06-04 Rovema Gmbh Vorrichtung und Verfahren zum Erkennen einer Lagenstärke oder einer Anzahl von Lagen von Verpackungszuschnitten
EP1053962A3 (en) * 1999-05-11 2001-09-19 Mars Incorporated Flexible media dispenser
GB2349872B (en) * 1999-05-11 2004-01-14 Mars Inc Flexible media dispenser
US6715750B1 (en) 1999-05-11 2004-04-06 Mars Incorporated Flexible media dispenser
US20080063457A1 (en) * 2006-09-11 2008-03-13 Seiko Epson Corporation Sheet Bundle Printer and Method of Controlling Sheet Bundle Printer
US7909523B2 (en) * 2006-09-11 2011-03-22 Seiko Epson Corporation Sheet bundle printer and method of controlling sheet bundle printer
US9345368B2 (en) 2014-05-19 2016-05-24 Sca Hygiene Products Ab Paper product dispenser and related methods
US20180253053A1 (en) * 2017-03-02 2018-09-06 Kabushiki Kaisha Toshiba Paper feed apparatus and image forming apparatus
US10421629B2 (en) * 2017-03-02 2019-09-24 Kabushiki Kaisha Toshiba Paper feed apparatus and image forming apparatus
US10899565B2 (en) 2017-03-02 2021-01-26 Kabushiki Kaisha Toshiba Paper feed apparatus and image forming apparatus
US10980377B1 (en) 2019-12-18 2021-04-20 Essity Hygiene And Health Aktiebolag Apparatus and methods for paper dispensing
US11116365B2 (en) 2019-12-18 2021-09-14 Essity Hygiene And Health Aktiebolag Horizontally oriented paper product dispenser and related methods
US12042099B2 (en) 2019-12-18 2024-07-23 Essity Hygiene And Health Aktiebolag Horizontally oriented paper product dispenser and related methods
US12144470B2 (en) 2019-12-18 2024-11-19 Essity Hygiene And Health Aktiebolag Apparatus and methods for paper dispensing

Also Published As

Publication number Publication date
NL6717549A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1968-06-28
GB1165279A (en) 1969-09-24
BE708498A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1968-06-24
FR1552327A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1969-01-03
DE1611419A1 (de) 1972-02-10

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