US3924849A - Paper gripping device for use with a chain driven paper carriage - Google Patents

Paper gripping device for use with a chain driven paper carriage Download PDF

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Publication number
US3924849A
US3924849A US460103A US46010374A US3924849A US 3924849 A US3924849 A US 3924849A US 460103 A US460103 A US 460103A US 46010374 A US46010374 A US 46010374A US 3924849 A US3924849 A US 3924849A
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US
United States
Prior art keywords
paper
lower step
grip members
gripping device
bar
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
US460103A
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English (en)
Inventor
Shinichi Murakami
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Application granted granted Critical
Publication of US3924849A publication Critical patent/US3924849A/en
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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/042—Intermediate conveyors, e.g. transferring devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/045—Details of grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/085—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers by combinations of endless conveyors and grippers

Definitions

  • ABSTRACT Paper gripping device for use with a chain driven paper carriage comprising a gripper bar mounted between the driving chains of the paper carriage, the gripper bar having a U-shaped configuration where one leg of the U-shaped bar is stepped at the upper extremity thereof to form an inner, lower step and an outer, higher step; a shaft rotatably mounted in and along the length of the gripper bar; grip members mounted on the shaft; springs for respectively biasing the group members against the lower step of the stepped portion of the gripping bar so that when a paper sheet is gripped by the gripping member an outwardly convex configuration is imparted thereto by the upper step of the stepped portion to thereby facilitate subsequent processing of the paper; and cam means for rotating the grip members away from the lower step against the biasing action of the springs to permit reception or release of the paper away from the paper gripping device.
  • This device relates to a gripper mechanism for carrying the sheets of paper one by one successively in a copying machine, printing machine or the like.
  • roller or belt systems have been popularly used for passing the copy or printing paper through each process in a copying or printing machine.
  • chain driven systems provided with gripper means adapted to grip or hold each sheet of paper have also been used for carrying the paper in a positive manner.
  • the present invention has a primary object of providing an improved chain gripper mechanism which avoids the above described problems of conventional systems.
  • FIG. 1 is a schematic illustration of a copying machine in which the paper gripper of the present invention can be incorporated.
  • FIGS. 2 to illustrate a preferred embodiment of a paper gripper according to the present invention where FIG. 2 is a plane view, FIG. 3 is a rear view, FIG. 4 is a sectional view taken along the line 44 of FIG. 2, and FIG. 5 is a partial, diagrammatic sketch illustrating the operation of the gripper.
  • Copy paper is supplied from one of the paper trays 8 or 9 by a feed roller 10 or 11 and is carried to a transfer zone 14 by a gripper 13 provided on a chain 12. There the paper is closely attached to the surface of the photoconductive drum 7, with the image on the drum surface being transferred to the paper. Thereafter, the copy paper, to which the images have now been transferred, is carried through a fixing unit 15 to complete image fixing. It is then discharged into a receiver container 16. In the above process, the gripper 13 must securely grip every sheet of paper supplied by feed rollers 10 or 11.
  • FIGS. 2-5 an illustrative embodiment of a gripper mechanism according to the presentinvention is provided between two parallelchains 20 and 21 by brackets 34.
  • a shaft 25 is rotatably supported by bearings 23 and 24 in a gripper bar 22 which is U- shaped in section.
  • a plural number of gripping members 26 are rotatably mounted on shaft 25 at suitable intervals.
  • Each of the gripping members 26 has a stopper portion 26a for registering the leading edge of paper P and a gripping 26b for holding paper P against an end of the gripper bar 22.
  • Each gripping member 26 is forced in the gripping direction, that is, in the clockwise direction in FIG. 4, by an associated spring 27 provided on shaft 25.
  • each gripping member 26 In the inside of each gripping member 26 is provided a cam block 28 secured to shaft 25 so as to be rotated therewith and upwardly force gripping member 26, when required, to effect receiving or releasing of paper P. Rotation of shaft 25 is effected by operating a lever 29 at each end of shaft 25 by a cam 31 or other means.
  • U-sectioned gripper bar 22 is stepped (see FIG. 4) so that paper P is gripped by gripping member 26 at the inside lower step 30a of stepped portion 30.
  • the paper P when gripped, has imparted thereto an outwardly convex configuration by an outside higher step 30b. This convexity proves helpful to effect perfect intimate contact of the leading end of paper P against the surface of the photoconductive drum 7 in transfer zone 14 of FIG. 1.
  • Opening'and closing of each gripper member 26 is accomplished by displacing lever 29 with cam 31 as shown in FIG. 5. That is, when paper P is delivered along a guide 33 by feed rollers 32, the gripper 13, which operates at a faster speed than the paper delivery speed, registers the leading edge of paper P against its stopper portion 26a where the forward gripping portion 26b of gripping member 26 extends through an opening (not shown) in guide 33.
  • a suitable paper feed device for use with the present invention is described in the copending application mentioned hereinbefore entitled Improved Paper Feed Apparatus."
  • the chain driven, paper carriage gripper device provides a uniform gripping force spring 27 which independently press the respective gripper member 26. Registration or correct positioning of each sheet of paper P is readily accomplished as is imparting thereto an optimum configuration. Thus perfect image transfer to the very edge of paper P is effected and hence the attainment of high-quality reproductions.
  • Paper gripping device for use with a chain driven paper carriage having at least two driving chains comprising a gripper bar mounted between the driving chains of the paper carriage, said gripper bar having a U- shaped configuration where one leg of the U- shaped bar is stepped at the upper extremity thereof to form an inner, lower step and an outer, higher step having a rise therebetween;
  • a shaft rotatably mounted in and along the length of said gripper bar; grip members mounted on said shaft;
  • cam means for rotating said grip members away from said lower step against the biasing action of said springs to permit reception or release of said paper away from said paper gripping device.
  • each of said grip members includes an upper, forwardly extending portion which engages said lower step under the biasing action of its associated spring and a lower, downwardly extending stopper portion against which said paper is registered as it is received by said paper gripping device.
  • a paper gripping device as in claim 2 including first cam members mounted in alignment with each other along said shaft for respectively raising said grip members away from said lower step; at least one lever mounted on said shaft; and a further cam member disposed adjacent the path traveled by said grip members for rotating said lever to effect said raising of the grip members through said first cam members.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Discharge By Other Means (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Paper Feeding For Electrophotography (AREA)
US460103A 1973-04-26 1974-04-11 Paper gripping device for use with a chain driven paper carriage Expired - Lifetime US3924849A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1973049277U JPS5316910Y2 (de) 1973-04-26 1973-04-26

Publications (1)

Publication Number Publication Date
US3924849A true US3924849A (en) 1975-12-09

Family

ID=12826347

Family Applications (1)

Application Number Title Priority Date Filing Date
US460103A Expired - Lifetime US3924849A (en) 1973-04-26 1974-04-11 Paper gripping device for use with a chain driven paper carriage

Country Status (2)

Country Link
US (1) US3924849A (de)
JP (1) JPS5316910Y2 (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348018A (en) * 1978-08-10 1982-09-07 Gaspar A. H. Bijttebier Method and apparatus for the separation of flexible sheets from a stack and their transportation to a processing unit
US4501415A (en) * 1981-09-04 1985-02-26 Motter Printing Press Co. Balanced deflection gripper for sheet handling equipment
US4526100A (en) * 1983-05-20 1985-07-02 Siasprint S.R.L. Gripper device for transporting and registering plates or sheets to be overprinted on silk screen printing machines in one or more colors
US4530495A (en) * 1982-12-01 1985-07-23 Veb Kombinat Polygraph "Werner Lamberz" Leipzig Pick-up unit in a sheet-transporting device of a printing machine
US4629176A (en) * 1984-12-07 1986-12-16 Xerox Corporation Paper gripper bar
US5053826A (en) * 1990-12-21 1991-10-01 Xerox Corporation Transfer loop synchronization in recirculating color printers
US5128726A (en) * 1990-12-20 1992-07-07 Xerox Corporation Sheet transport system with improved gripping and registration mechanism
US5301938A (en) * 1992-12-17 1994-04-12 Xerox Corporation Apparatus for gripping and registering sheets
US5320341A (en) * 1992-06-29 1994-06-14 Xerox Corporation Document handler for transporting large documents
DE4434151A1 (de) * 1994-09-24 1996-03-28 Heidelberger Druckmasch Ag Greifer für Bogendruckmaschinen
DE19527439A1 (de) * 1995-07-27 1997-02-06 Heidelberger Druckmasch Ag Greiferbrücke für Ausleger von Druckmaschinen
US6179111B1 (en) * 1996-10-12 2001-01-30 Koenig & Bauer Aktiengesellschaft Device for conveying folded signatures
US6487966B2 (en) 2000-08-11 2002-12-03 I.S.T. S.R.L. Gripper for conveying sheets in silk-screen printing machines
US20050070418A1 (en) * 2003-09-30 2005-03-31 Haasl Andrew L. Assembly for and method of gripping sheets of material in an interfolder
US9624040B2 (en) 2010-08-25 2017-04-18 Hewlett-Packard Development Company, L.P. Substrate support

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101961950B (zh) * 2010-08-13 2013-04-10 天津长荣印刷设备股份有限公司 一种开牙取样装置及其工作方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797929A (en) * 1973-01-29 1974-03-19 Sperry Rand Corp Gripper-bar bumper pads

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797929A (en) * 1973-01-29 1974-03-19 Sperry Rand Corp Gripper-bar bumper pads

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348018A (en) * 1978-08-10 1982-09-07 Gaspar A. H. Bijttebier Method and apparatus for the separation of flexible sheets from a stack and their transportation to a processing unit
US4501415A (en) * 1981-09-04 1985-02-26 Motter Printing Press Co. Balanced deflection gripper for sheet handling equipment
US4530495A (en) * 1982-12-01 1985-07-23 Veb Kombinat Polygraph "Werner Lamberz" Leipzig Pick-up unit in a sheet-transporting device of a printing machine
US4526100A (en) * 1983-05-20 1985-07-02 Siasprint S.R.L. Gripper device for transporting and registering plates or sheets to be overprinted on silk screen printing machines in one or more colors
US4629176A (en) * 1984-12-07 1986-12-16 Xerox Corporation Paper gripper bar
US5128726A (en) * 1990-12-20 1992-07-07 Xerox Corporation Sheet transport system with improved gripping and registration mechanism
US5053826A (en) * 1990-12-21 1991-10-01 Xerox Corporation Transfer loop synchronization in recirculating color printers
US5320341A (en) * 1992-06-29 1994-06-14 Xerox Corporation Document handler for transporting large documents
US5301938A (en) * 1992-12-17 1994-04-12 Xerox Corporation Apparatus for gripping and registering sheets
DE4434151C2 (de) * 1994-09-24 2000-05-25 Heidelberger Druckmasch Ag Greifer für Bogendruckmaschinen
DE4434151A1 (de) * 1994-09-24 1996-03-28 Heidelberger Druckmasch Ag Greifer für Bogendruckmaschinen
US5605098A (en) * 1994-09-24 1997-02-25 Heidelberger Druckmaschinen Ag Grippers for sheet-fed printing presses
DE19527439A1 (de) * 1995-07-27 1997-02-06 Heidelberger Druckmasch Ag Greiferbrücke für Ausleger von Druckmaschinen
US5758576A (en) * 1995-07-27 1998-06-02 Heidelberger Druckmaschinen Ag Gripper bar for deliveries of printing presses
DE19527439C2 (de) * 1995-07-27 2002-10-24 Heidelberger Druckmasch Ag Greiferbrücke für Ausleger von Druckmaschinen
US6179111B1 (en) * 1996-10-12 2001-01-30 Koenig & Bauer Aktiengesellschaft Device for conveying folded signatures
US6487966B2 (en) 2000-08-11 2002-12-03 I.S.T. S.R.L. Gripper for conveying sheets in silk-screen printing machines
US20050070418A1 (en) * 2003-09-30 2005-03-31 Haasl Andrew L. Assembly for and method of gripping sheets of material in an interfolder
US7329221B2 (en) * 2003-09-30 2008-02-12 Fpna Acquisition Corporation Assembly for and method of gripping sheets of material in an interfolder
US9624040B2 (en) 2010-08-25 2017-04-18 Hewlett-Packard Development Company, L.P. Substrate support

Also Published As

Publication number Publication date
JPS49150231U (de) 1974-12-26
JPS5316910Y2 (de) 1978-05-06

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