US3927877A - Paper feed tray for use with copying machine and the like - Google Patents

Paper feed tray for use with copying machine and the like Download PDF

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Publication number
US3927877A
US3927877A US419331A US41933173A US3927877A US 3927877 A US3927877 A US 3927877A US 419331 A US419331 A US 419331A US 41933173 A US41933173 A US 41933173A US 3927877 A US3927877 A US 3927877A
Authority
US
United States
Prior art keywords
tray
stack
copying machine
feeding
copy 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
US419331A
Other languages
English (en)
Inventor
Yasuhiko Terajima
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 US3927877A publication Critical patent/US3927877A/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
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/60—Loosening articles in piles
    • 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
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/0816—Suction grippers separating from the top of pile
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S271/00—Sheet feeding or delivering
    • Y10S271/901—Magnetic operation

Definitions

  • FIGJE- PAPER FEED TRAY FOR USE WITH COPYING 1 MACHINE AND THE LIKE BACKGROUND OF THE INVENTION 1.
  • the present invention relates to a paper feed device for use with a duplicator, a printing machine, or the like, and, in particular, to a paper feed tray for a stack of copy paper.
  • a conventional paper feed device of a duplicator, a printing machine, or the like is provided with a paper feed roll for feeding sheets of copy paper in tight contact therewith.
  • the paper is fed forward by the paper feed roll for every cycle of duplication.
  • the paper feed operation by the paper feed roll is often disturbed by the attraction between adjoining sheets of copy paper which may be caused by humidity or by static friction.
  • Such double feeding constitutes a cause of trouble in the interior of the duplicator after the copy paper has been fed.
  • the stack of copy paper may be manipulated by the operator of the duplicator, prior to placing the stack of paper on a paper feed tray so that the curb of the paper are manually separated.
  • the operator of the duplicator may be manipulated by the operator of the duplicator, prior to placing the stack of paper on a paper feed tray so that the curb of the paper are manually separated.
  • all operators are not appropriately trained to efiect this manipulation. Further, such manual manipulation tends to be unreliable.
  • a rubber roll inside the duplicator called a manipulating roll has been used to manipulate by revolving the rubber roll, and in addition, the manipulating roll has been supplemented by a blast pipe.
  • the manipulating roll has been supplemented by a blast pipe.
  • such manipulation by a rubber roll or a blast pipe needs a driving gear to effectuate proper handling.
  • the duplicator tends to be bulky and complicated and hence, unsuitable for a small-sized duplicator or printing machine.
  • the present invention overcomes the aforementioned problems of the prior art and a primary purpose thereof lies in providing a paper feed tray capable of properly handling a stack of paper, in spite of the simple construction and the small size thereof.
  • FIG. 1 is a schematic drawing of a copying apparatus incorporating the present invention.
  • FIG. 2 is a perspective of the paper feed device 8 of FIG. 1.
  • FIG. 3 is a perspective of the important section of the paper feed tray 9 of FIGS. 1 and 2.
  • FIG. 4 is a section along A-A' in FIG. 3.
  • FIG. I there is diagrammatically illustrated a photosensitive drum 1 which revolves in the direction of the arrow A.
  • the surface of the drum is repetitively processed at the following conventional stations which include an electrification or charging station 2, an 6X- posure station 3, a developing station 4, a transfer sta- 2 tion 5, and a cleaning station 6.
  • a fixing station 7 and a paper feed device 8 are also employed.
  • the paper feed device 8 comprises a paper feed tray 9 made of an electrically insulating material, and a paper feed pladorm ll having rails 10, 1 0 for sliding paper feed tray 9 so that copy paper can be readily placed in the tray.
  • the rear wall 12 of paper feed tray 9 has an electrifier 13 provided therein.
  • a screen 14 is provided on the side of rear wall 12 and confronts the copy paper to separate electrifier 13 and the copy paper. The screen 14 may be placed in or taken out of position freely by inserting it into, or pulling it out of grooves l5, 15' formed in paper feed tray 9.
  • the electrifier 13 comprises a needle-shaped electrode l6 and an opposed electrode 17 disposed in parallel to each other.
  • the needle-shaped electrode 16 is connected with a direct-current high-voltage generator 18 and the opposed electrode 17 is preferably grounded.
  • the direct-current highwoltage generator 18 has an interrupt switch (not shown in the drawing) disposed on the input side thereof.
  • the interrupt switch may be placed on a door which is opened when the operator of the duplicator is about to place copy paper into tray 9. This switch would be switched off when the door is opened.
  • the cord 19 on the high-voltage side of the electrifier 13 and the cord 20 on the ground side thereof are sufliciently long to allow the paper feed tray 9 complete freedom to slide.
  • the paper feed tray of the present invention is such that the copy paper need not be processed prior to the placing thereof in the tray. Further, the construction thereof is quite simple and thus, it is quite advantageous in terms of space savings, lower price, and better performance when compared with the conventional more complicated paper feed trays.
  • a paper feed device for use with a copying machine or the like, said device comprising:
  • charging means for applying electric charge to at least the side of said stack to separate the sheets of copy paper from one another and thus lessen the probability of the sheets being double fed to the copying machine;
  • feeding means for feeding said sheets from said tray to said copying machine
  • said tray being slideably disposed in said copying machine and the said potential source for said charging means being fixedly disposed in the copying machine, the potential source being connected to the charging means by wires of sufficient length to permit free sliding movement of said tray.
  • a device as in claim 1 including discharging means for discharging the charge on said sheets after they are transferred from said tray by said feeding means.
  • a device as in claim 2 where said feeding means includes at least one feed out roller for feeding said copy papers from said stack, said feed out roller being 4 connected to a reference potential to discharge the charge on said copy paper.
  • feeding means includes vacuum means for applying a vacuum to the topmost sheet of said stack of copy paper after it has been separated by said charging means to initiate the feeding of the topmost sheet from said stack.
  • a tray as in claim 1 including screen means disposed in said tray for separating said charging means from said stack of copy paper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Pile Receivers (AREA)
US419331A 1973-04-20 1973-11-27 Paper feed tray for use with copying machine and the like Expired - Lifetime US3927877A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1973046576U JPS5316909Y2 (enrdf_load_stackoverflow) 1973-04-20 1973-04-20

Publications (1)

Publication Number Publication Date
US3927877A true US3927877A (en) 1975-12-23

Family

ID=12751114

Family Applications (1)

Application Number Title Priority Date Filing Date
US419331A Expired - Lifetime US3927877A (en) 1973-04-20 1973-11-27 Paper feed tray for use with copying machine and the like

Country Status (5)

Country Link
US (1) US3927877A (enrdf_load_stackoverflow)
JP (1) JPS5316909Y2 (enrdf_load_stackoverflow)
DE (1) DE2416754C3 (enrdf_load_stackoverflow)
FR (1) FR2226344B1 (enrdf_load_stackoverflow)
GB (1) GB1427050A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077227A (en) * 1976-11-12 1978-03-07 Regents Of The University Of Minnesota Method of freezing liquid material in which agglomeration is inhibited
US4949950A (en) * 1989-02-14 1990-08-21 Xerox Corporation Electrostatic sheet transport
WO1998022376A1 (de) * 1996-11-18 1998-05-28 Weitmann & Konrad Gmbh & Co. Kg Vorrichtung zum auffächern eines stapels bogenförmiger produkte, wie papierbögen oder dergleichen
CN112193870A (zh) * 2020-09-27 2021-01-08 重庆三创印刷有限公司 一种具有防卡纸功能的印刷装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58120419U (ja) * 1982-02-10 1983-08-16 三菱重工業株式会社 空気調和機の凝縮水処理装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1716602A (en) * 1927-09-07 1929-06-11 Continental Can Co Method of and means for separating metal sheets
US2576882A (en) * 1946-09-04 1951-11-27 Hartford Nat Band And Trust Co Device for conveying paper and similar substances
US2650092A (en) * 1948-11-23 1953-08-25 Caspers Tin Plate Company Magnetic separator for sheet feeding apparatus
US3672665A (en) * 1969-11-13 1972-06-27 Agfa Gevaert Ag Device for the feeding of sheets in copying machines or the like
US3726520A (en) * 1969-08-13 1973-04-10 Hitachi Ltd Apparatus for automatically conveying sheets of paper by means of electrostatic adsorption

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1716602A (en) * 1927-09-07 1929-06-11 Continental Can Co Method of and means for separating metal sheets
US2576882A (en) * 1946-09-04 1951-11-27 Hartford Nat Band And Trust Co Device for conveying paper and similar substances
US2650092A (en) * 1948-11-23 1953-08-25 Caspers Tin Plate Company Magnetic separator for sheet feeding apparatus
US3726520A (en) * 1969-08-13 1973-04-10 Hitachi Ltd Apparatus for automatically conveying sheets of paper by means of electrostatic adsorption
US3672665A (en) * 1969-11-13 1972-06-27 Agfa Gevaert Ag Device for the feeding of sheets in copying machines or the like

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077227A (en) * 1976-11-12 1978-03-07 Regents Of The University Of Minnesota Method of freezing liquid material in which agglomeration is inhibited
US4949950A (en) * 1989-02-14 1990-08-21 Xerox Corporation Electrostatic sheet transport
WO1998022376A1 (de) * 1996-11-18 1998-05-28 Weitmann & Konrad Gmbh & Co. Kg Vorrichtung zum auffächern eines stapels bogenförmiger produkte, wie papierbögen oder dergleichen
CN112193870A (zh) * 2020-09-27 2021-01-08 重庆三创印刷有限公司 一种具有防卡纸功能的印刷装置

Also Published As

Publication number Publication date
DE2416754A1 (de) 1974-11-07
JPS5316909Y2 (enrdf_load_stackoverflow) 1978-05-06
DE2416754B2 (de) 1978-11-30
GB1427050A (en) 1976-03-03
FR2226344A1 (enrdf_load_stackoverflow) 1974-11-15
JPS49148056U (enrdf_load_stackoverflow) 1974-12-20
DE2416754C3 (de) 1979-08-16
FR2226344B1 (enrdf_load_stackoverflow) 1978-01-06

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