JPS57191662A - Method and device for plural number of copying - Google Patents

Method and device for plural number of copying

Info

Publication number
JPS57191662A
JPS57191662A JP7669881A JP7669881A JPS57191662A JP S57191662 A JPS57191662 A JP S57191662A JP 7669881 A JP7669881 A JP 7669881A JP 7669881 A JP7669881 A JP 7669881A JP S57191662 A JPS57191662 A JP S57191662A
Authority
JP
Japan
Prior art keywords
capacitor
switch
latent image
exposure
electric potential
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.)
Pending
Application number
JP7669881A
Other languages
Japanese (ja)
Inventor
Tsutomu Sato
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP7669881A priority Critical patent/JPS57191662A/en
Publication of JPS57191662A publication Critical patent/JPS57191662A/en
Pending legal-status Critical Current

Links

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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)

Abstract

PURPOSE:To copy a number of stabilized images by using a latent image in one time exposure repeatedly, by providing a parallel circuit consisting of a series- connecting material of a resistance and a make and break switch, and a capacitor between an electric conductor layer and a ground. CONSTITUTION:An outer circuit 10 provided in parallel with a series-connecting material of a make and break switch 12 and a variable resistance 13 and a capacitor 12, is connected between an electric conductor layer 1b and a ground. In case plural number of copying, a switch 12 is closed and a photoreceptor is uniformly charged in negative by a primary charging device 2, then the switch 12 is opened and a capacitor 11 is charged by lowering a surface electric potential by irradiating uniformly a positive electric charge by a secondary charging device 3. In the state, an image exposure is performed and when developments and transferrings are repeated with the latent image, a surface electric potential is lowered and toner density is lowered, therefore a surface electric potential is recovered by closing the switch 12 and discharging the capacitor 11 at a proper time. By this way, a number of stabilized images are copied by using a latent image repeatedly with one exposure.
JP7669881A 1981-05-22 1981-05-22 Method and device for plural number of copying Pending JPS57191662A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7669881A JPS57191662A (en) 1981-05-22 1981-05-22 Method and device for plural number of copying

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7669881A JPS57191662A (en) 1981-05-22 1981-05-22 Method and device for plural number of copying

Publications (1)

Publication Number Publication Date
JPS57191662A true JPS57191662A (en) 1982-11-25

Family

ID=13612709

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7669881A Pending JPS57191662A (en) 1981-05-22 1981-05-22 Method and device for plural number of copying

Country Status (1)

Country Link
JP (1) JPS57191662A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0148013A2 (en) * 1984-01-03 1985-07-10 Xerox Corporation Electrostatographic imaging system
US4984026A (en) * 1988-04-25 1991-01-08 Minolta Camera Kabushiki Kaisha Color image forming method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0148013A2 (en) * 1984-01-03 1985-07-10 Xerox Corporation Electrostatographic imaging system
US4984026A (en) * 1988-04-25 1991-01-08 Minolta Camera Kabushiki Kaisha Color image forming method

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