US3811670A - Electrostatographic apparatus with air baffle - Google Patents

Electrostatographic apparatus with air baffle Download PDF

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Publication number
US3811670A
US3811670A US00362597A US36259773A US3811670A US 3811670 A US3811670 A US 3811670A US 00362597 A US00362597 A US 00362597A US 36259773 A US36259773 A US 36259773A US 3811670 A US3811670 A US 3811670A
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US
United States
Prior art keywords
support
baffle
puffer
transfer corona
transfer
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
US00362597A
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English (en)
Inventor
N Inoue
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Application granted granted Critical
Publication of US3811670A publication Critical patent/US3811670A/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
    • G03G15/6532—Removing a copy sheet form a xerographic drum, band or plate
    • 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
    • B65H29/54—Article strippers, e.g. for stripping from advancing elements
    • B65H29/56—Article strippers, e.g. for stripping from advancing elements for stripping from elements or machines
    • 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
    • Y10S271/90—Stripper

Definitions

  • ABSTRACT In an electrostatographic apparatus wherein toner images are transferred from a first imaging support to a second flexible support with a transfer corona generator, past which said second support is transported on the first support, and wherein an air puffer assists in peeling the second support from the first support by air injection against the second support; the improvement comprising an air baffle positioned between the transfer corona generator and the puffer for impeding the air from said puffer from deflecting the second support adjacent the transfer corona generator, thereby reducing toner smearing.
  • the powder image thus formed is transferred at a transfer station 5 onto a transfer medium 7, such as paper, which is fed from a supply source 6 synchronously with the position of the powder image on the powder image formation member 2.
  • FIG. 1 is a schematic view of an otherwise conventional exemplary xerographic machine in accordance with the present invention, showing the status of the transfer medium just prior to its being subjected to air injection by the pufier;
  • FIG. 2 is the same basic view of the embodiment of FIG. 1, illustrating the state of the transfer medium after it has been subjected to air injection by the operation of the puffer;
  • FIG. 3 shows an alternative embodiment, identical to the embodiment of FIGS. 1 and 2 except for a difference in the air baffle configuration.
  • the baffle 10 or 11 is adapted to prevent the air injection impact from the puffer 8 from acting on the transfer medium 7 in the transfer station.
  • the baffle 10 or 11 used for such impact prevention is attached at a position confronting the powder image formation member 2 which either presses the transfer medium 7 against the powder image formation member 2 (as in the embodiment of FIGS. 1 and 2), or leaves a small spacing therebetween to the extent that the transfer medium 7 is restrained in close contact with the member 2 near the side of the transfer corotron 5 (as in the embodiment of FIG. 3).
  • the baffle l0 or ll is preferably made of a sheet of polyvinylchloride or fluorine rubber or a thin metallic plate, all of which preferably have an applied Teflon coating. It has been experimentally proven that the higher the insulating property, the more efficient the baffle is.
  • a Mylar sheet of 0.3 millimeter thickness was employed as a baffle 10.
  • the baffle 10 was disposed such that the transfer medium 7 was slightly pressed by the baffle 10 to the powder image formation member 2. With such an arrangement smear was completely eliminated. The impact generated by the puffer 8 was thwarted by the baffle sheet 10, and no longer reached the transfer position.
  • an acrylic sheet of 0.8 millimeter thickness was used as a baffle 11.
  • the baffle 11 was positioned so as to leave a spacing of about 1 milliimeter between the member 2 and the baffle 11. With such provisions, smear did not arise. In this case it was found that the spacing of l millimeter was sufficient to accomplish the absorption of the injection impact from the puffer 8.
  • baffle means comprises a flexible shield mounted to said transfer corona means facing said puffer means and extending toward said first support.
  • baffle means engages said first support for slightly pressing said second support against said first support.
  • baffle means is a thin insulative air shield plate.
  • baffle means is a insulative shield mounted adjacent said ter of said first support.
  • transfer corona means and extending to closely adjacent said first support for restricting the movement of said second support away from said first support adjacent said transfer corona means.
  • baffle means is a thin non-metalic plate.
  • baffle means engages said first support for slightly pressing said second support against said first support.
  • baffle means is positioned to within approximately 1 millime-

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
US00362597A 1972-06-19 1973-05-21 Electrostatographic apparatus with air baffle Expired - Lifetime US3811670A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972071376U JPS5220305Y2 (ja) 1972-06-19 1972-06-19

Publications (1)

Publication Number Publication Date
US3811670A true US3811670A (en) 1974-05-21

Family

ID=13458709

Family Applications (1)

Application Number Title Priority Date Filing Date
US00362597A Expired - Lifetime US3811670A (en) 1972-06-19 1973-05-21 Electrostatographic apparatus with air baffle

Country Status (2)

Country Link
US (1) US3811670A (ja)
JP (1) JPS5220305Y2 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013359A (en) * 1974-08-23 1977-03-22 Pitney-Bowes, Inc. Electrostatic copier including means for detaching paper from a photoconductor
US4050691A (en) * 1973-05-28 1977-09-27 Canon Kabushiki Kaisha Separator device in a copying machine
US4261560A (en) * 1977-12-21 1981-04-14 Ricoh Company, Ltd. Sheet separation apparatus
US5298955A (en) * 1993-03-29 1994-03-29 Xerox Corporation Blade cleanable corona porous transfer device
US5585696A (en) * 1991-12-06 1996-12-17 Mitsubishi Denki Kabushiki Kaisha High current density glow discharge switch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5497341U (ja) * 1977-12-16 1979-07-10

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380733A (en) * 1965-11-01 1968-04-30 Xerox Corp Sheet-stripping apparatus
US3575502A (en) * 1967-06-15 1971-04-20 Agfa Gevaert Ag Electrophotographic copying arrangement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380733A (en) * 1965-11-01 1968-04-30 Xerox Corp Sheet-stripping apparatus
US3575502A (en) * 1967-06-15 1971-04-20 Agfa Gevaert Ag Electrophotographic copying arrangement

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050691A (en) * 1973-05-28 1977-09-27 Canon Kabushiki Kaisha Separator device in a copying machine
US4013359A (en) * 1974-08-23 1977-03-22 Pitney-Bowes, Inc. Electrostatic copier including means for detaching paper from a photoconductor
US4261560A (en) * 1977-12-21 1981-04-14 Ricoh Company, Ltd. Sheet separation apparatus
US5585696A (en) * 1991-12-06 1996-12-17 Mitsubishi Denki Kabushiki Kaisha High current density glow discharge switch
US5298955A (en) * 1993-03-29 1994-03-29 Xerox Corporation Blade cleanable corona porous transfer device

Also Published As

Publication number Publication date
JPS5220305Y2 (ja) 1977-05-10
JPS4929939U (ja) 1974-03-14

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