EP0138065A1 - Dispositif d'alimentation pour feuilles de papier - Google Patents

Dispositif d'alimentation pour feuilles de papier Download PDF

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Publication number
EP0138065A1
EP0138065A1 EP84110912A EP84110912A EP0138065A1 EP 0138065 A1 EP0138065 A1 EP 0138065A1 EP 84110912 A EP84110912 A EP 84110912A EP 84110912 A EP84110912 A EP 84110912A EP 0138065 A1 EP0138065 A1 EP 0138065A1
Authority
EP
European Patent Office
Prior art keywords
paper
accordance
sheet feeder
paper sheet
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.)
Withdrawn
Application number
EP84110912A
Other languages
German (de)
English (en)
Inventor
Douglas Roger Arnoldi
Richard Arthur Sloan, Jr.
George F. Gustafson
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.)
Unisys Corp
Original Assignee
Burroughs 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 Burroughs Corp filed Critical Burroughs Corp
Publication of EP0138065A1 publication Critical patent/EP0138065A1/fr
Withdrawn legal-status Critical Current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
    • B65H3/46—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
    • B65H3/5246—Driven retainers, i.e. the motion thereof being provided by a dedicated drive
    • B65H3/5253—Driven retainers, i.e. the motion thereof being provided by a dedicated drive the retainers positioned under articles separated from the top of the pile
    • B65H3/5261—Retainers of the roller type, e.g. rollers

Definitions

  • This invention relates in general to a paper sheet feeder. More particularly, this invention relates to a paper sheet feeder which separates and transports a single sheet of paper from the top of a stack of paper to a separate device such as a printer, copier or scanner.
  • Paper sheet feeders are well known in the prior art, finding application in feeding sheets of paper, one at a time, into separate using devices such as typewriters, printers, copiers and scanners.
  • the tray containing the paper supply must be repositioned as the paper supply is depleted. Additionally, most prior art feeders require relatively expensive and complex mechanisms to move a single sheet of paper from the paper supply to the separate using device. Further, many prior art sheet feeders include constraining mechanisms at the edges of the paper supply stack, and therefore require the paper all to be of a uniform width. In addition, many prior art paper feeders are limited to handling paper stock of a uniform type or thickness.
  • a paper supply is positioned on the lower level of a two-level paper tray, each level of the tray including a flat section, an inclined section connecting the upper and lower levels.
  • a first rotatable shaft Positioned above the upper tray level is a first rotatable shaft on which are radially mounted a pair of flexible elastomer blades offset from one another by approximately 120 degrees. As the first shaft is rotated, one of the blades contacts the top of the paper supply and drags several top sheets up the inclined tray section and onto the upper tray level.
  • a second rotatable shaft positioned below the upper tray level, has a separating wheel mounted on it.
  • the separating wheel passes through a cutout section in the upper tray level so that paper passing over the upper tray level contacts the outer surface of the separating wheel.
  • the first blade is flexed to a more curved shape, increasing the pressure on the several sheets.
  • the restraining action of the separating wheel stops and reverse feeds all of the several sheets except the top one.
  • FIG. 1 shows the preferred embodiment of the paper sheet feeder 10 in a rest position.
  • the paper supply 12 is positioned on the lower section 32 of paper tray 14.
  • portions of the tray 14 shown in FIG. 1 have been broken away.
  • the upper, lower and inclined sections 34, 32 and 28, respectively, of tray 14 extend beyond the edge 36 of tray 14.
  • the upper and inclined sections 34 and 28 extend longitudinally across the rear side of separating wheel 26 so that cutout section 38 actually has a fourth side.
  • sheets of paper of various widths may be included in the paper supply 12. Because of this capability, in the preferred embodiment no side walls are provided on the tray 14.
  • a rotatable shaft 16 is positioned as shown in FIG. 2 above the paper tray 14.
  • the frame which supports the shaft with its axis parallel to the top surface of tray 14 is not shown. Additional means (not shown) are connected to one end of shaft 16 in order to selectively rotate shaft 16 in the direction shown.
  • Both the frame and means for rotating shaft 16 can constructed from conventional mechanisms which are well known in the prior art.
  • two flexible elastomer blades 18, 20 are mounted on the shaft 16. As will be explained later in more detail, these blades 18, 20 serve to transport the sheets of paper from the top of the paper supply 12 toward the end 22 of the tray 14.
  • a second rotatable shaft 24 is positioned as shown in FIG. 2 below paper tray 14.
  • the frame used to support shaft 16 also supports shaft 24, each shaft's longitudinal axis being in parallel alignment.
  • the same means used to rotate shaft 16 also rotates shaft 24 in the same direction.
  • a second drive means may be utilized to rotate shaft 24 in the indicated direction.
  • a separating wheel 26 is mounted on shaft 24 in the position shown in FIG. 1. The surface speed of separating wheel 26 is approximately the same as the feed rate of flexible blades 18 and 20. As will be discussed below in more detail, the separating wheel 26 moves in a direction counter to the paper feed direction in order to restrain excess paper from being moved from the paper supply 12 to the end 22 of tray 14.
  • the sheet feeder 10 is designed to separate and transport a single sheet of paper from the top of the stack 12 of paper to a separate device (not shown) such as a printer, copier or scanner. With the elements of the sheet feeder 10 now defined, its operation will now be described in detail.
  • FIG. 1 shows the paper feeder in a rest position. In the rest position, neither shaft 16 or 24 is being rotated and the blades 18, 20 are not in contact with the paper supply 12 or the tray 14. Thus, no restraint exists on the paper. Therefore, in the rest position, a previously fed sheet of paper can be transported away by the receiving mechanism of the separate device with essentially no drag.
  • the drive mechanism(s) are activated to rotate both shafts 16 and 24 in the direction indicated.
  • the rotation of shaft 16 moves flexible blade 18 into contact with the top of the stack 12 of paper and drags several of the top sheets of paper up the inclined section 28 of tray 14.
  • blade 18 is flexed to a more curved shape (see FIG. 2), thus increasing the pressure on the several sheets of paper.
  • each of the blades 18,20 are fabricated so that their coefficient of friction is higher than that of the paper's surface and the surface 30 of separating wheel 26.
  • the separating wheel 26 exerts a restraining force on all of the several sheets of paper except the top sheet.
  • This restraining force stops and reverse feeds all of the several sheets of paper except the top sheet due to coefficient of friction of blade 18 being higher than that of the separating wheel 26 and paper.
  • This reverse feeding action causes additional sheets which start to follow the top sheet to be fed back to the top of the inclined section 28 of tray 14 (FIG. 2).
  • FIG. 2 shows the paper feeder 10 halfway through a feed cycle.
  • the several top sheets of paper have reached the separator wheel 26 and maximum reverse feeding of all of the several sheets of paper except the top sheet is occurring.
  • the second flexible blade 20 is contacting the top sheet of the several sheets of paper.
  • the motion of the second blade 20 will maintain the movement of the top sheet of paper toward the end 22 of tray 14 as the first blade 18 passes separator wheel 26 and kicks out to a free position (as shown in dotted lines in FIG. 2).
  • the using device (not shown) which is to receive paper from the feeder 10 is positioned adjacent to the end 22 of tray 14.
  • the feeder 1C transports the leading edge of the top sheet of the paper supply past the end 22 of tray 14 within one revolution of shaft 16.
  • shaft 16 the length of blades 18, 20 and the length of the top sheet of paper may result in more than one rotation of shaft 16 being required in order to transport a sheet of paper a sufficient distance for it to be engaged with the paper receiving mechanism of the printer or other using device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP84110912A 1983-09-15 1984-09-12 Dispositif d'alimentation pour feuilles de papier Withdrawn EP0138065A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53246583A 1983-09-15 1983-09-15
US532465 1983-09-15

Publications (1)

Publication Number Publication Date
EP0138065A1 true EP0138065A1 (fr) 1985-04-24

Family

ID=24121932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84110912A Withdrawn EP0138065A1 (fr) 1983-09-15 1984-09-12 Dispositif d'alimentation pour feuilles de papier

Country Status (1)

Country Link
EP (1) EP0138065A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU582490B2 (en) * 1987-02-17 1989-03-23 Omron Tateisi Electronics Co. Notes feeding device
US5074544A (en) * 1990-10-17 1991-12-24 Pitney Bowes Inc. Document feeding apparatus
EP0757961A1 (fr) * 1994-03-03 1997-02-12 Kabushiki Kaisha Ace Denken Dispositif de separation et de transport de feuilles de papier

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381860A (en) * 1980-11-03 1983-05-03 Xerox Corporation Paddle wheel retard feeder
FR2520705A3 (fr) * 1982-01-29 1983-08-05 Olivetti & Co Spa Dispositif de distribution feuille a feuille pour un alimentateur de feuilles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381860A (en) * 1980-11-03 1983-05-03 Xerox Corporation Paddle wheel retard feeder
FR2520705A3 (fr) * 1982-01-29 1983-08-05 Olivetti & Co Spa Dispositif de distribution feuille a feuille pour un alimentateur de feuilles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU582490B2 (en) * 1987-02-17 1989-03-23 Omron Tateisi Electronics Co. Notes feeding device
US5074544A (en) * 1990-10-17 1991-12-24 Pitney Bowes Inc. Document feeding apparatus
EP0757961A1 (fr) * 1994-03-03 1997-02-12 Kabushiki Kaisha Ace Denken Dispositif de separation et de transport de feuilles de papier
EP0757961A4 (fr) * 1994-03-03 1997-12-03 Ace Denken Kk Dispositif de separation et de transport de feuilles de papier

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19851021

17Q First examination report despatched

Effective date: 19860714

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19861125

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ARNOLDI, DOUGLAS ROGER

Inventor name: GUSTAFSON, GEORGE F.

Inventor name: SLOAN, RICHARD ARTHUR, JR.