US3826379A - Method and means for reducing the effect of electrostatic charges on paper in a copying system - Google Patents

Method and means for reducing the effect of electrostatic charges on paper in a copying system Download PDF

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Publication number
US3826379A
US3826379A US00336816A US33681673A US3826379A US 3826379 A US3826379 A US 3826379A US 00336816 A US00336816 A US 00336816A US 33681673 A US33681673 A US 33681673A US 3826379 A US3826379 A US 3826379A
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United States
Prior art keywords
sheets
charges
electrical
sheet
hold
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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
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US00336816A
Inventor
W Wright
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Individual
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Individual
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.)
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Publication date
Application filed by Individual filed Critical Individual
Priority to US00336816A priority Critical patent/US3826379A/en
Application granted granted Critical
Publication of US3826379A publication Critical patent/US3826379A/en
Publication of US3826379B1 publication Critical patent/US3826379B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6552—Means for discharging uncollated sheet copy material, e.g. discharging rollers, exit trays
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
    • G03G15/6573—Feeding path after the fixing point and up to the discharge tray or the finisher, e.g. special treatment of copy material to compensate for effects from the fixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/513—Modifying electric properties
    • B65H2301/5133—Removing electrostatic charge
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00417—Post-fixing device
    • G03G2215/00421—Discharging tray, e.g. devices stabilising the quality of the copy medium, postfixing-treatment, inverting, sorting
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00654—Charging device

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Pile Receivers (AREA)

Abstract

The present device provides a means to remove electrostatic charges from one side of a sheet of paper and means to provide a ground plane so that the remaining charges are attracted to the ground plane which causes the sheets of paper to stack without ''''floating.

Claims (6)

1. A device to be used with a sheet stacking means which is associated with a sheet transport means and wherein sheets to be stacked therein hold electrostatic charges thereon comprising in combination: first electrical conducting means formed to wipe a sheet passing thereunder and disposed along said sheet transport means so as to wipe one surface of a sheet passing therealong; means connecting said first electrical conducting means to a first voltage potential source in order to cause electrical current to flow in response to a sheet being wiped by said first electrical conducting means; means to hold sheets at rest within said stacking means, said means to hold sheets at rest being at least partially formed of electrical conducting material; means connecting said means to hold sheets at rest to a second voltage potential source whereby charges are induced on said means to hold sheets at rest in response to the approach of a sheet which has been wiped by said first electrical conducting means so that the electrostatic attraction between charges remaining on a sheet approaching said means to hold sheets at rest and said induced charges positively urges said sheets toward said means to hold sheets at rest.
2. A device according to claim 1 wherein said electrical conducting means is a wire brush whose length is substantially the width of sheet passing in contact therewith.
3. A device according to claim 1 wherein said means to hold sheets is a metal plate within said stacker bin.
4. A device according to claim 1 wherein said first voltage potential is ground potential.
5. A device according to claim 1 wherein said second voltage potential is ground potential.
6. A method for reducing the effect of electrostatic charges on sheets of paper which are transported to a stacking location and stacked comprising the steps of: a. locating an electrically conducting wiping means in proximity to the sheets of paper carrying electrostatic charges on their respective surfaces; b. connecting said electrically conducting wiping means to a voltage potential source whereby electrical charges wiped by said electrical conducting wiping means will conduct therefrom and alternatively be neutralized; c. wiping said sheets of paper on one side with said electrically conducting wiping means to cause the electrical charges thereon to conduct therefrom and alternatively be neutralized thereby leaving the electrical charges respectively on the other surfaces of said sheets; d. locating an electrically conducting receiving means in said stacking location; e. connecting said electrically conducting receiving means to a voltage potential source whereby the charges on the other side of said sheets being stacked act to induce charges on said electrically conducting receiving means to positively pull said sheets toward said electrically conducting receiving means.
US00336816A 1973-02-28 1973-02-28 Method and means for reducing the effect of electrostatic charges on paper in a copying system Expired - Lifetime US3826379A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US00336816A US3826379A (en) 1973-02-28 1973-02-28 Method and means for reducing the effect of electrostatic charges on paper in a copying system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00336816A US3826379A (en) 1973-02-28 1973-02-28 Method and means for reducing the effect of electrostatic charges on paper in a copying system

Publications (2)

Publication Number Publication Date
US3826379A true US3826379A (en) 1974-07-30
US3826379B1 US3826379B1 (en) 1989-01-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00336816A Expired - Lifetime US3826379A (en) 1973-02-28 1973-02-28 Method and means for reducing the effect of electrostatic charges on paper in a copying system

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4380037A (en) * 1981-05-18 1983-04-12 Burlington Industries, Inc. Electrostatic treatment of paper
JPS59116962U (en) * 1983-12-02 1984-08-07 株式会社東芝 Fusing device
EP0176157A1 (en) * 1984-09-27 1986-04-02 Océ-Nederland B.V. A device for collating sheets
EP0179235A2 (en) * 1984-10-19 1986-04-30 Siemens Nixdorf Informationssysteme Aktiengesellschaft Leaving paper re-entry preventing device for an office machine
DE3604915A1 (en) * 1985-02-22 1986-08-28 Hitachi Koki Co., Ltd., Tokio/Tokyo Paper feed device for a printer
US5062764A (en) * 1990-01-08 1991-11-05 Robert A. Foisie Method and apparatus using electrostatic charges to stabilize the upper sheets of a stack of paper
US5228373A (en) * 1990-01-08 1993-07-20 Robert A. Foisie Method and apparatus using electrostatic charges to temporarily hold packets of paper
US6241239B1 (en) 1996-10-22 2001-06-05 Oce Printing Systems Gmbh Device for outputting single sheets from a printer
EP1172711A2 (en) * 2000-06-20 2002-01-16 Oki Data Corporation Electrophotographic printer for preventing toner offset from a fixing unit
WO2002049944A1 (en) * 2000-12-18 2002-06-27 Gbr Systems Corporation Anti-static sheet feeding mechanism
US6505829B2 (en) * 1998-11-27 2003-01-14 Canon Kabushiki Kaisha Sheet treating apparatus and image forming apparatus having the same
US8857814B2 (en) * 2012-04-25 2014-10-14 Riso Kagaku Corporation Sheet ejection device
US20160187846A1 (en) * 2014-12-25 2016-06-30 Konica Minolta, Inc. Image forming system, image forming apparatus, and post-processing apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891668A (en) * 1956-05-31 1959-06-23 Sylvania Electric Prod Static escapement device
US2989181A (en) * 1955-12-30 1961-06-20 Ibm Automatic sorting machine
US3071179A (en) * 1961-03-30 1963-01-01 Us Rubber Co Tire building apparatus and method
US3322424A (en) * 1965-01-25 1967-05-30 Warren S D Co Apparatus and method for sheet transport and control
US3668451A (en) * 1970-08-14 1972-06-06 Ian Roderick Mcnab Electrical brush structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989181A (en) * 1955-12-30 1961-06-20 Ibm Automatic sorting machine
US2891668A (en) * 1956-05-31 1959-06-23 Sylvania Electric Prod Static escapement device
US3071179A (en) * 1961-03-30 1963-01-01 Us Rubber Co Tire building apparatus and method
US3322424A (en) * 1965-01-25 1967-05-30 Warren S D Co Apparatus and method for sheet transport and control
US3668451A (en) * 1970-08-14 1972-06-06 Ian Roderick Mcnab Electrical brush structure

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4380037A (en) * 1981-05-18 1983-04-12 Burlington Industries, Inc. Electrostatic treatment of paper
JPS59116962U (en) * 1983-12-02 1984-08-07 株式会社東芝 Fusing device
JPS6146535Y2 (en) * 1983-12-02 1986-12-27
EP0176157A1 (en) * 1984-09-27 1986-04-02 Océ-Nederland B.V. A device for collating sheets
EP0179235A2 (en) * 1984-10-19 1986-04-30 Siemens Nixdorf Informationssysteme Aktiengesellschaft Leaving paper re-entry preventing device for an office machine
EP0179235A3 (en) * 1984-10-19 1987-04-29 Nixdorf Computer Aktiengesellschaft Leaving paper re-entry preventing device for an office machine
DE3604915A1 (en) * 1985-02-22 1986-08-28 Hitachi Koki Co., Ltd., Tokio/Tokyo Paper feed device for a printer
US5228373A (en) * 1990-01-08 1993-07-20 Robert A. Foisie Method and apparatus using electrostatic charges to temporarily hold packets of paper
US5062764A (en) * 1990-01-08 1991-11-05 Robert A. Foisie Method and apparatus using electrostatic charges to stabilize the upper sheets of a stack of paper
US6241239B1 (en) 1996-10-22 2001-06-05 Oce Printing Systems Gmbh Device for outputting single sheets from a printer
US6505829B2 (en) * 1998-11-27 2003-01-14 Canon Kabushiki Kaisha Sheet treating apparatus and image forming apparatus having the same
EP1172711A2 (en) * 2000-06-20 2002-01-16 Oki Data Corporation Electrophotographic printer for preventing toner offset from a fixing unit
EP1172711A3 (en) * 2000-06-20 2002-03-13 Oki Data Corporation Electrophotographic printer for preventing toner offset from a fixing unit
US6484009B2 (en) 2000-06-20 2002-11-19 Oki Data Corporation Electrophotographic printer having offset prevention
WO2002049944A1 (en) * 2000-12-18 2002-06-27 Gbr Systems Corporation Anti-static sheet feeding mechanism
US8857814B2 (en) * 2012-04-25 2014-10-14 Riso Kagaku Corporation Sheet ejection device
US20160187846A1 (en) * 2014-12-25 2016-06-30 Konica Minolta, Inc. Image forming system, image forming apparatus, and post-processing apparatus
US9817356B2 (en) * 2014-12-25 2017-11-14 Konica Minolta, Inc. Image forming system, image forming apparatus, and post-processing apparatus

Also Published As

Publication number Publication date
US3826379B1 (en) 1989-01-24

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Date Code Title Description
RR Request for reexamination filed

Effective date: 19871222

B1 Reexamination certificate first reexamination
CCB Certificate of correction for reexamination