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US20060202405A1 - Sheet separating device for an image input/output apparatus - Google Patents

Sheet separating device for an image input/output apparatus Download PDF

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Publication number
US20060202405A1
US20060202405A1 US11/370,398 US37039806A US2006202405A1 US 20060202405 A1 US20060202405 A1 US 20060202405A1 US 37039806 A US37039806 A US 37039806A US 2006202405 A1 US2006202405 A1 US 2006202405A1
Authority
US
United States
Prior art keywords
sheet
pad
layer
separating device
pad layer
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.)
Abandoned
Application number
US11/370,398
Other languages
English (en)
Inventor
Devon Shyu
Pubber Tsai
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.)
Avision Inc
Original Assignee
Avision Inc
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 Avision Inc filed Critical Avision Inc
Assigned to AVISION INC. reassignment AVISION INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TSAI, PUBBER, SHYU, DEVON
Publication of US20060202405A1 publication Critical patent/US20060202405A1/en
Abandoned 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
    • B65H3/5207—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/172—Composite material

Definitions

  • This invention relates to a sheet separating device, particularly to one applied to an auto document feeder installed with an image input/output apparatus employed in a scanner, a copier, a multi-functional product or a printer, for feeding papers placed in a paper tray into the image input/output apparatus for images capturing or performing.
  • the sheet separating device has a function of single-sheet feeding and multiple sequent stages of sheet separating action.
  • One method of scanning by an image-scanning device is to place the document to be scanned on a scanning window and then to scan the document by means of an optical module for capturing an image of the document.
  • Another method of scanning is to place the document in a paper tray then move the document and the optical module relatively by means of the auto document feeder with the optical module being in a stationary state for getting an image of the document.
  • the auto document feeder has a sheet-separating device that can feed sheets one by one into the auto document feeder.
  • the sheet-separating device includes a roller assembly consisting of plural rollers, and paper path formed by the rollers.
  • a printer As for a printer, it also uses a sheet-separating device for feeding a sheet into the auto document feeder then print the image on the sheet.
  • the sheet-separating device mentioned above includes an ADF roller 12 , a pad 14 and an elasticity element 16 .
  • the elasticity provide for elastic force to the pad 14 so that the pad 14 can to bias against the surface of the ADF roller 12 .
  • a plurality of sheet 18 placed in a paper tray (not shown), and one end of the sheet 18 is located between the ADF roller 12 and the pad 14 . Then the sheet 18 is moved one by one by the ADF roller 12 .
  • the problem of multiple feed can be improved by adjusting the sheet-separating angle, in addition to multiple stages of sheet separating action.
  • the current technique is to use plural stages of sheet separating action so that the sheet-separating device may enhance the probability of picking up and feeding only a single sheet at one time.
  • the different friction of the ADF roller, documents and the friction pad is used to separate the documents.
  • the ADF roller and document is larger than the one of the documents or the document and pad, the ADF feed the document to be scanned.
  • the first purpose of the invention is to offer a sheet-separating device making sheet separating action for plural stages at one time, at least two stages, so the probability of single sheet feeding may be enhanced greatly, not affecting scanning function and the speed of sheet feeding.
  • the second purpose of the invention is to offer a sheet-separating device having a simple and compact structure, very convenient for assemblage and manufacture.
  • the sheet-separating device includes an ADF roller, a multi-layer pad and an elasticity element.
  • the ADF roller is located at the sheet-feed end of a sheet feeder.
  • the multi-layer pad is assembled on the housing of the sheet feeder and opposite to the ADF roller, which includes a first pad layer and a second pad layer.
  • the elastic force of the elasticity element pushes the multi-pad forward to the ADF roller, so as to occur pressed-over between the second pad layer and the ADF roller.
  • the ADF roller cooperates with the second pad layer to separate documents again. Therefore only single document is fed into the paper path of the automatic feeder device, wherein the paper path is formed by a plurality of rollers.
  • FIG. 1 is a perspective view of a conventional sheet-separating device
  • FIG. 2 is a cross-sectional view of the conventional sheet-separating device under an operating condition
  • FIG. 3 is a perspective view of a first embodiment of a sheet-separating device in the present invention.
  • FIG. 4 is a cross-sectional view of the first embodiment of a sheet-separating device under an operating condition in the present invention
  • FIG. 5 is a cross-sectional view of the first embodiment of a sheet-separating device under a stage of practically used condition in the present invention
  • FIG. 6 is a cross-sectional view of the first embodiment of a sheet separating device under another stage of practically used condition in the present invention.
  • FIG. 7 is a cross-sectional view of a second embodiment of a sheet-separating device under a stage of practically used condition.
  • a first preferred embodiment of a sheet separating device is applied to an auto document feeder, which includes the sheet separating device and a roller unit consisting of plural rollers.
  • the roller unit faces to an end of the sheet separating device where a sheet comes out, forming a paper path for the sheet feeding out of the sheet-separating device to be moved thereon.
  • the auto document feeder can be installed in an image input/output apparatus of a scanner, a printer, a copier or a multi-function product.
  • a sheet-separating device 30 in the present invention includes a ADF roller 40 , a multi-layer pad 50 , a mylar 60 and a spring 70 , located at a sheet exit end of a paper tray arranged in an image input/output device.
  • the ADF roller 40 has an axial rotary shaft 42 for rotating the ADF roller 40 .
  • the multi-layer pad 50 is located near the surface of the ADF roller 40 , elastically pushed by the spring 70 to the ADF roller 40 . Further, the multi-layer pad 50 is pushed to form an angle called as a sheet separating angle ⁇ against the surface where the spring 70 stands on.
  • the mylar 60 is attached on the upper surface of the multi-layer pad 50 , facing to the ADF pad 40 .
  • the multi-layer pad 50 is composed of a first pad layer 52 and a second pad layer 54 superposed on the first pad layer 52 , as shown in FIG. 4 .
  • the first and the second pad layer 52 and 54 may be made of the same material or different materials.
  • the ADF roller 40 may contact the second pad layer 54 in a pressed-over way after the sheet-separating device is assembled together, with the first pad layer 52 kept in normal contact with the surface of the ADF roller 40 .
  • the second pad layer 54 of the multi-layer pad 50 may be made to have a first saw-tooth member 56 and a second saw-tooth member 58 formed at its front end for increasing friction against paper sheets so as to enhance sheet-separating effect.
  • the first saw-tooth member 56 , the second saw-tooth member 58 and the first pad layer 52 all contact with the ADF roller 40 , and it should be noticed that the second saw-tooth member 58 of the second pad layer 54 is in contact with the ADF roller 40 in a pressed-over way
  • the first pad layer 52 and the second pad layer 54 may be independent from each other, or the first pad layer 52 and the second pad layer 54 may be integrated as one unit.
  • the multi-layer pad 50 is also possible to consist of more than two pad layers superposed on one another, and the pad layer located farthest from the spring 70 is to be in contact with the ADF roller 40 in a pressed-over way.
  • the ADF roller 40 should be rotated during performing automatic sheet-separation.
  • the bottom sheet 18 of papers piled up is to be picked up by the ADF roller 40 to move towards the exit end 32 of the sheet-separating device 30 , and the sheet 18 is to be moved on a plural roller unit (not shown) at the exit end 32 and then enters the interior of an automatic sheet feeder.
  • the second pad layer 54 cooperates with the ADF roller 40 for moving many sheets at the same time, and the piled-up sheets are separated for a second time by means of the first pad layer 52 and the ADF roller 40 .
  • the bottom sheet of the piled-up papers receives comparative large force of the ADF roller 40 and is picked up first, so the probability of picking a single sheet at the first time may be enhanced in sheet separating action.
  • the second time of sheet picking by the action of the ADF roller 40 together with the first pad layer 52 can carry out single sheet separating for a second time, separating the plural sheets picked up by the first time, so the frequency of sheet separating action is increased for ensuring a single sheet separation at one round always.
  • the invention has the following advantages, as can be understood by the foresaid description.
  • Two or more pad layers are used in a multi-layer pad for friction, very simple in its structure, and very easy for assemblage or manufacture.
  • the sheet separating in the present invention is sequent and continual, not slowing down the speed of the sheet feeding, or affecting the time for scanning or printing an image.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US11/370,398 2005-03-08 2006-03-08 Sheet separating device for an image input/output apparatus Abandoned US20060202405A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW094106975A TWI268699B (en) 2005-03-08 2005-03-08 Sheet-separating device for an image input/output apparatus
TW094106975 2005-03-08

Publications (1)

Publication Number Publication Date
US20060202405A1 true US20060202405A1 (en) 2006-09-14

Family

ID=36969999

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/370,398 Abandoned US20060202405A1 (en) 2005-03-08 2006-03-08 Sheet separating device for an image input/output apparatus

Country Status (2)

Country Link
US (1) US20060202405A1 (zh)
TW (1) TWI268699B (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080224381A1 (en) * 2005-09-13 2008-09-18 Benq Corporation Paper feeder enabling proper feeding alignment
US20100127448A1 (en) * 2008-11-26 2010-05-27 Teco Image System Co., Ltd. Sheet separating device with noise suppressing function and auto document feeder having such sheet separating device
US10549937B2 (en) 2016-01-29 2020-02-04 Hewlett-Packard Development Company, L.P. Device including separator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI386031B (zh) * 2008-08-19 2013-02-11 虹光精密工業股份有限公司 具分頁功能之影像讀取設備
TWI395461B (zh) * 2008-11-11 2013-05-01 Avision Inc 具有非直線型饋紙通道之掃描設備

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4815724A (en) * 1986-02-28 1989-03-28 Mita Industrial Co., Ltd. Sheet feeding mechanism
US5269506A (en) * 1992-09-29 1993-12-14 Hewlett-Packard Company Paper pick-up system for printers
US5584475A (en) * 1994-05-19 1996-12-17 Brother Kogyo Kabushiki Kaisha Sheet feeding device
US5697604A (en) * 1994-12-21 1997-12-16 Canon Kabushiki Kaisha Sheet supply apparatus
US20040169326A1 (en) * 2002-12-27 2004-09-02 Brother Kogyo Kabushiki Kaisha Sheet feeding device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4815724A (en) * 1986-02-28 1989-03-28 Mita Industrial Co., Ltd. Sheet feeding mechanism
US5269506A (en) * 1992-09-29 1993-12-14 Hewlett-Packard Company Paper pick-up system for printers
US5584475A (en) * 1994-05-19 1996-12-17 Brother Kogyo Kabushiki Kaisha Sheet feeding device
US5697604A (en) * 1994-12-21 1997-12-16 Canon Kabushiki Kaisha Sheet supply apparatus
US20040169326A1 (en) * 2002-12-27 2004-09-02 Brother Kogyo Kabushiki Kaisha Sheet feeding device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080224381A1 (en) * 2005-09-13 2008-09-18 Benq Corporation Paper feeder enabling proper feeding alignment
US20100127448A1 (en) * 2008-11-26 2010-05-27 Teco Image System Co., Ltd. Sheet separating device with noise suppressing function and auto document feeder having such sheet separating device
TWI396628B (zh) * 2008-11-26 2013-05-21 Teco Image Sys Co Ltd 具抑制噪音功能之分紙裝置、自動饋紙裝置及製造方法
US10549937B2 (en) 2016-01-29 2020-02-04 Hewlett-Packard Development Company, L.P. Device including separator

Also Published As

Publication number Publication date
TW200633498A (en) 2006-09-16
TWI268699B (en) 2006-12-11

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Legal Events

Date Code Title Description
AS Assignment

Owner name: AVISION INC., TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHYU, DEVON;TSAI, PUBBER;REEL/FRAME:017697/0441;SIGNING DATES FROM 20060306 TO 20060307

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION