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US20080054549A1 - Document feeder - Google Patents

Document feeder Download PDF

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Publication number
US20080054549A1
US20080054549A1 US11/470,448 US47044806A US2008054549A1 US 20080054549 A1 US20080054549 A1 US 20080054549A1 US 47044806 A US47044806 A US 47044806A US 2008054549 A1 US2008054549 A1 US 2008054549A1
Authority
US
United States
Prior art keywords
sheet
pick
stop portion
arm
document feeder
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
US11/470,448
Other languages
English (en)
Inventor
Hsin-Wen Lee
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.)
Primax Electronics Ltd
Original Assignee
Primax Electronics Ltd
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 Primax Electronics Ltd filed Critical Primax Electronics Ltd
Assigned to PRIMAX ELECTRONICS LTD. reassignment PRIMAX ELECTRONICS LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, HSIN-WEN
Publication of US20080054549A1 publication Critical patent/US20080054549A1/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
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0615—Rollers or like rotary separators reciprocating and rotatable in one direction only
    • 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
    • B65H3/56—Elements, e.g. scrapers, fingers, needles, brushes, acting on separated article or on edge of the pile
    • B65H3/565—Elements, e.g. scrapers, fingers, needles, brushes, acting on separated article or on edge of the pile for reintroducing partially separated articles in the stack

Definitions

  • the present invention relates to a document feeder, and more particularly to a document feeder having a stopper.
  • the paper sheets should be manually placed on the scanning platform of the image scanners one by one.
  • This means of manually feeding the paper sheets is time-consuming and laboring.
  • the image scanner usually has a document feeder for successively and continuously feeding many paper sheets.
  • a conventional document feeder has a sheet pick-up module arranged in the sheet feeding path for automatically feeding the paper sheets one by one at a time.
  • the document feeder further has a stopper under the sheet pick-up module.
  • the stopper When the stack of paper sheets enters the sheet feeding path, the stopper is sustained against the front edges of the stack such that the paper sheets are positioned under the sheet pick-up module. Once the paper sheets are stopped by the stopper, the user may feel that the paper sheets are placed in position.
  • the sheet pick-up module performs the sheet pick-up operation, the stopper is shifted such that the paper sheets are smoothly transported through the sheet feeding path.
  • FIG. 1 is a schematic perspective view illustrating relative locations of the sheet pick-up module and the stopper of a conventional document feeder.
  • the stopper 12 is pivotal and disposed under the sheet pick-up module 11 .
  • the sheet pick-up module 11 comprises a sustaining portion 111 .
  • the stopper 12 comprises a tilt portion 121 and a sheet stop portion 122 .
  • the sheet stop portion 122 is rotated to an upright position so as to be sustained against the front edges of the stack of paper sheets.
  • the sustaining portion 111 is also lowered down to touch the tilt portion 121 of the stopper 12 .
  • the sheet stop portion 122 is rotated under the sheet feeding path. Under this circumstance, the paper sheets can be smoothly transported through the sheet feeding path without being stopped by the stopper 12 .
  • the stopper 12 of the conventional document feeder still has some drawbacks.
  • the sheet stop portion 122 of the stopper 12 is only sustained against the lower portions of the paper sheets, but the upper portion of the paper sheets may suppress the tilt portion 121 of the stopper 12 .
  • the sheet stop portion 122 is rotated under the sheet feeding path before the sheet pick-up operation is done, so that the function of the stopping the paper sheets is lost.
  • a document feeder in accordance with an aspect of the present invention, there is provided a document feeder.
  • the document feeder includes a housing, a sheet pick-up arm and a stopper.
  • the housing includes a sheet feeding path for placing paper sheets thereon.
  • the sheet pick-up arm is pivotally mounted above the sheet feeding path and movable between a first position and a second position.
  • the sheet pick-up arm has a protrusion structure.
  • the stopper is disposed under the sheet feeding path and includes a pivotal portion and a sheet stop portion.
  • the sheet stop portion has a hooking part corresponding to the protrusion structure.
  • the sheet pick-up arm comprises a sheet pick-up roller and a sheet separation roller.
  • the document feeder further comprises a driving shaft for driving the sheet pick-up arm, wherein the sheet separation roller is sheathed around the driving shaft.
  • the stopper further comprises a loading portion.
  • the loading portion and the sheet stop portion are arranged on opposite sides of the pivotal portion. With the pivotal portion serving as a fulcrum, the torque applied on the loading portion is greater than the torque applied on the sheet stop portion.
  • the document feeder further comprises a torsion spring having an end sustained against the sheet stop portion.
  • FIG. 1 is a schematic perspective view illustrating relative locations of the sheet pick-up module and the stopper of a conventional document feeder;
  • FIG. 2 is a schematic perspective view of a document feeder according to a preferred embodiment of the present invention.
  • FIG. 3A is a schematic perspective view illustrating relative locations of the sheet pick-up module and the stopper when the sheet pick-up module is adjusted to a standby position;
  • FIG. 3B is a schematic perspective view illustrating relative locations of the sheet pick-up module and the stopper when the sheet pick-up module is adjusted to a sheet feeding position;
  • FIGS. 4A-4F are schematic cross-sectional views illustrating the process of performing the sheet pick-up operation by the sheet pick-up module and the stopper of the present document feeder.
  • the document feeder 2 includes a housing 20 , a sheet pick-up module 21 and a stopper 22 .
  • the housing 20 has a sheet feeding path 201 for placing therein the paper sheets S to be transported therethrough.
  • the sheet pick-up module 21 is pivotally mounted above the sheet feeding path 201 for feeding the paper sheets S through the sheet feeding path 201 .
  • the sheet pick-up module 21 includes a sheet pick-up arm 211 and a driving shaft 212 .
  • the sheet pick-up arm 211 includes a sheet pick-up roller 211 A and a sheet separation roller 211 B (as is shown in FIG. 3A ).
  • the sheet separation roller 211 B is also sheathed around the driving shaft 212 .
  • the sheet pick-up arm 211 is lifted to a standby position upon rotation of the driving shaft 212 .
  • the driving shaft 212 is driven to rotate in the opposite direction such that the sheet pick-up arm 211 is lowered to the sheet feeding position.
  • a sheet pick-up roller 221 A of the sheet pick-up arm 212 transports the paper sheets S forwardly and the sheet separation roller 211 B of the sheet pick-up arm 212 is rotated to separate the top paper sheets from the stack of paper sheets, thereby picking a single paper sheets.
  • the document feeder 2 further includes a stopper 22 accommodated within a recess 202 under the sheet feeding path 201 , as is also shown in FIG. 4A .
  • the stopper 22 is rotated to an upright position so as to be sustained against the front edges of the stack of paper sheets.
  • the stack of paper sheets S fails to be transported through the sheet feeding path 201 .
  • a free swing of the stopper 22 is rendered. Under this circumstance, the stack of paper sheets S may suppress the stopper 22 and is then transported through the sheet feeding path 201 .
  • FIGS. 3A and 3B are schematic perspective views illustrating relative locations of the sheet pick-up module 21 and the stopper 22 when the sheet pick-up module 21 is adjusted to a standby position and a sheet feeding position, respectively.
  • the stopper 22 is made upright when the sheet pick-up arm 211 of the sheet pick-up module 21 is lifted to the standby position, and a free swing of the stopper 22 is rendered when the sheet pick-up arm 211 of the sheet pick-up module 21 is lowered to the sheet feeding position.
  • the stopper 22 includes a pivotal portion 221 , a loading portion 222 and a sheet stop portion 223 .
  • the pivotal portion 221 is accommodated within a recess 202 (as is also shown in FIG. 4A ).
  • the pivotal portion 221 is substantially a cylindrical post serving as a rotating shaft of the stopper 22 . That is, by using the pivotal portion 221 as the fulcrum, the loading portion 222 and the sheet stop portion 223 are rotatable.
  • the sheet stop portion 223 is substantially a stop plate to be sustained against the front edges of the stack of paper sheets S.
  • the loading portion 222 and the sheet stop portion 223 are arranged on opposite sides of the pivotal portion 221 .
  • the torque applied on the loading portion 222 is greater than the torque applied on the sheet stop portion 223 .
  • the sheet stop portion 223 will be returned toward the upright position due to the torque applied on the loading portion 222 .
  • the sheet stop portion 223 has a hooking part 223 A extending from a first lateral side thereof.
  • the sheet pick-up arm 211 has a protrusion structure 211 C extending from a second lateral side thereof.
  • the hooking part 223 A of the sheet stop portion 23 is hooked onto the protrusion structure 211 C of the sheet pick-up arm 211 such that the sheet stop portion 223 maintains upright to stop the paper sheets.
  • the hooking part 223 A of the sheet stop portion 23 is deviated from the swing track 223 A′ of the hooking part 223 A to permit free swing of the sheet stop portion 23 .
  • the hooking part 223 A is extended from the first lateral side of the sheet stop portion 223
  • the protrusion structure 21 IC is extended from the second lateral side of the sheet pick-up arm 211 .
  • the upper portions of the paper sheets may suppress the tilt portion of the stopper when the sheet pick-up module is in the standby position. That is, the function of the stopping the paper sheets is readily lost by using the conventional document feeder.
  • the present document feeder 2 With the cooperation of the hooking part 223 A of the sheet stop portion 23 and the protrusion structure 211 C of the sheet pick-up arm 211 , the function of stopping the paper sheets is selectively enabled or disabled when the sheet pick-up arm 211 is lifted to the standby position or lower to the sheet feeding position. As a consequence, the upper portions of the paper sheets are still stopped when the paper sheets S are placed on the sheet feeding path.
  • the sheet pick-up arm 211 is lowered to the sheet feeding position, and the sheet pick-up roller 21 1 A is rotated on the top paper sheets.
  • the protrusion structure 211 C is detached from the hooking part 223 A and thus a free swing of the sheet stop portion 223 of the stopper 22 is rendered.
  • the top paper sheets S is transported to enter the sheet feeding path 201 .
  • the sheet stop portion 223 of the stopper 22 is swung toward the sheet feeding path 201 by the paper sheets S.
  • the sheet pick-up arm 211 is lifted to the standby position. Meanwhile, the protrusion structure 21 IC is located in the swing track 223 A′ of the hooking part 223 A, thereby restraining the swing range of the sheet stop portion 223 .
  • the sheet pick-up arm 211 of the document feeder 2 further comprises a stopping piece 211 D corresponding to the sheet stop portion 223 . After the paper sheets S is transported across the sheet stop portion 223 and the sheet stop portion 223 is swung backwardly, the end of the sheet stop portion 223 is stopped by the stopping piece 211 D such that the sheet stop portion 223 is in the upright position.
  • the sheet stop portion 223 will be kept at the upright position due to the torque applied on the loading portion 222 .
  • the document feeder 2 further includes a torsion spring 224 having an end sustained against the sheet stop portion 223 .
  • a torsion force is resulted from the torsion spring 224 .
  • the torsion force of the torsion spring 224 will facilitate the reverse rotation of the sheet stop portion 223 to the upright position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US11/470,448 2006-07-17 2006-09-06 Document feeder Abandoned US20080054549A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW095125986 2006-07-17
TW095125986A TWI290098B (en) 2006-07-17 2006-07-17 Sheet feeding apparatus

Publications (1)

Publication Number Publication Date
US20080054549A1 true US20080054549A1 (en) 2008-03-06

Family

ID=39115543

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/470,448 Abandoned US20080054549A1 (en) 2006-07-17 2006-09-06 Document feeder

Country Status (3)

Country Link
US (1) US20080054549A1 (zh)
JP (1) JP4505444B2 (zh)
TW (1) TWI290098B (zh)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080197560A1 (en) * 2007-02-16 2008-08-21 Foxlink Image Technology Co., Ltd. Paper Feeding Device
US20080246207A1 (en) * 2007-04-04 2008-10-09 Xerox Corporation. Feeding sheets into a photocopier
US20080265490A1 (en) * 2007-04-25 2008-10-30 Hewlett-Packard Development Company Lp Media stack stop
US20080277864A1 (en) * 2007-05-09 2008-11-13 Chia-Chih Liu Paper feeding device
US20080303204A1 (en) * 2007-06-05 2008-12-11 Yueh-Shing Lee Paper feeding device
US7891656B1 (en) * 2009-08-21 2011-02-22 Primax Electronics Ltd. Sheet feeding apparatus with sheet releasing mechanism
US20110199450A1 (en) * 2010-02-12 2011-08-18 Primax Electronics Ltd. Printing device
US20120056368A1 (en) * 2010-09-03 2012-03-08 Foxlink Image Technology Co., Ltd. Document feeding mechanism
US20140131937A1 (en) * 2012-11-09 2014-05-15 Primax Electronics Ltd. Automatic document feeder
US9828198B2 (en) * 2014-08-08 2017-11-28 Zhuhai Seine Technology Co., Ltd. Paper stop structure, paper feed unit, and image forming apparatus
CN108726216A (zh) * 2018-07-27 2018-11-02 新会江裕信息产业有限公司 一种喷墨打印机的下进纸系统
US10710830B2 (en) 2013-06-24 2020-07-14 Sharp Kabushiki Kaisha Paper feed apparatus, image reading apparatus comprising paper feed apparatus, and image forming apparatus comprising paper feed apparatus

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102070030B (zh) * 2009-11-23 2014-05-07 致伸科技股份有限公司 自动馈纸装置的取纸装置
TWI413590B (zh) * 2010-10-29 2013-11-01 Asia Optical Co Inc Take the paper module
CN102464215B (zh) * 2010-11-15 2014-08-06 亚洲光学股份有限公司 取纸模块
CN102730449A (zh) * 2011-04-01 2012-10-17 致伸科技股份有限公司 挡纸结构
JP6670343B2 (ja) * 2013-06-24 2020-03-18 シャープ株式会社 給紙装置、給紙装置を備える画像読取装置、および画像読取装置を備える画像形成装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7104539B2 (en) * 2002-06-18 2006-09-12 Canon Kabushiki Kaisha Sheet material feeding device and recording apparatus
US7111934B2 (en) * 2003-10-02 2006-09-26 Seiko Epson Corporation Recording medium feeding apparatus, recording apparatus, liquid ejecting apparatus
US7128317B2 (en) * 2004-09-10 2006-10-31 Lexmark International, Inc. Moveable media dam
US7320462B2 (en) * 2003-10-24 2008-01-22 Murata Kikai Kabushiki Kaisha Automatic document transportation device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08310668A (ja) * 1995-05-19 1996-11-26 Canon Inc シート給送装置及び該シート給送装置を備えた画像形成装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7104539B2 (en) * 2002-06-18 2006-09-12 Canon Kabushiki Kaisha Sheet material feeding device and recording apparatus
US7111934B2 (en) * 2003-10-02 2006-09-26 Seiko Epson Corporation Recording medium feeding apparatus, recording apparatus, liquid ejecting apparatus
US7320462B2 (en) * 2003-10-24 2008-01-22 Murata Kikai Kabushiki Kaisha Automatic document transportation device
US7128317B2 (en) * 2004-09-10 2006-10-31 Lexmark International, Inc. Moveable media dam

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080197560A1 (en) * 2007-02-16 2008-08-21 Foxlink Image Technology Co., Ltd. Paper Feeding Device
US20080246207A1 (en) * 2007-04-04 2008-10-09 Xerox Corporation. Feeding sheets into a photocopier
US20080265490A1 (en) * 2007-04-25 2008-10-30 Hewlett-Packard Development Company Lp Media stack stop
US7651082B2 (en) * 2007-04-25 2010-01-26 Hewlett-Packard Development Company, L.P. Media stack stop
US20080277864A1 (en) * 2007-05-09 2008-11-13 Chia-Chih Liu Paper feeding device
US7753363B2 (en) * 2007-05-09 2010-07-13 Foxlink Image Technology Co., Ltd. Paper feeding device
US20080303204A1 (en) * 2007-06-05 2008-12-11 Yueh-Shing Lee Paper feeding device
US20110042884A1 (en) * 2009-08-21 2011-02-24 Primax Electronics Ltd. Sheet feeding apparatus with sheet releasing mechanism
US7891656B1 (en) * 2009-08-21 2011-02-22 Primax Electronics Ltd. Sheet feeding apparatus with sheet releasing mechanism
US20110199450A1 (en) * 2010-02-12 2011-08-18 Primax Electronics Ltd. Printing device
US20120056368A1 (en) * 2010-09-03 2012-03-08 Foxlink Image Technology Co., Ltd. Document feeding mechanism
US8210520B2 (en) * 2010-09-03 2012-07-03 Foxlink Image Technology Co., Ltd. Document feeding mechanism having stopper means
US20140131937A1 (en) * 2012-11-09 2014-05-15 Primax Electronics Ltd. Automatic document feeder
US8807555B2 (en) * 2012-11-09 2014-08-19 Primax Electronics Ltd. Automatic document feeder
US10710830B2 (en) 2013-06-24 2020-07-14 Sharp Kabushiki Kaisha Paper feed apparatus, image reading apparatus comprising paper feed apparatus, and image forming apparatus comprising paper feed apparatus
US9828198B2 (en) * 2014-08-08 2017-11-28 Zhuhai Seine Technology Co., Ltd. Paper stop structure, paper feed unit, and image forming apparatus
CN108726216A (zh) * 2018-07-27 2018-11-02 新会江裕信息产业有限公司 一种喷墨打印机的下进纸系统

Also Published As

Publication number Publication date
TWI290098B (en) 2007-11-21
TW200806482A (en) 2008-02-01
JP2008024505A (ja) 2008-02-07
JP4505444B2 (ja) 2010-07-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: PRIMAX ELECTRONICS LTD., TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LEE, HSIN-WEN;REEL/FRAME:018211/0808

Effective date: 20060823

STCB Information on status: application discontinuation

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