JPS576854A - Image reproduction method in copying machine - Google Patents

Image reproduction method in copying machine

Info

Publication number
JPS576854A
JPS576854A JP8109780A JP8109780A JPS576854A JP S576854 A JPS576854 A JP S576854A JP 8109780 A JP8109780 A JP 8109780A JP 8109780 A JP8109780 A JP 8109780A JP S576854 A JPS576854 A JP S576854A
Authority
JP
Japan
Prior art keywords
toner
image
transferred
positively charged
copying
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
JP8109780A
Other languages
Japanese (ja)
Inventor
Michio Takahashi
Hideya Furuta
Yasuyuki Nukaya
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 JP8109780A priority Critical patent/JPS576854A/en
Publication of JPS576854A publication Critical patent/JPS576854A/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
    • G03G13/00—Electrographic processes using a charge pattern

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To execute multisheet copying by once exposure, by repeating development and transfer using one latent image obtained by imagewise exposure, when image density deteriorates, uniformly charging a toner image, then, removing the toner image, developing a photosensitive surface, and obtaining a positive or negative toner image. CONSTITUTION:A photoreceptor P having a photoconductive layer 12 on a conductive substrate 11 is, for example, positively charged (1), imagewise exposed (2), developed (3) with a toner 16, and the image is transferred (4) on a copying paper 17. The steps (3), (4) are repeated, but when copy image density lowers, the toner image is not transferred but uniformly exposed and at the same time positively charged (5), further positively charged (6), and the toner 16 is removed (7) by cleaning or transferring. Then, after reversal development (8) with a positive toner 23, transfer (9) is made, and these steps are repeated till deterioration of image density. Alternatively, the latent image obtained in the step (7) is developed (8') and transferred (9'), thus permitting multisheet copying to be executed by one exposure.
JP8109780A 1980-06-16 1980-06-16 Image reproduction method in copying machine Pending JPS576854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8109780A JPS576854A (en) 1980-06-16 1980-06-16 Image reproduction method in copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8109780A JPS576854A (en) 1980-06-16 1980-06-16 Image reproduction method in copying machine

Publications (1)

Publication Number Publication Date
JPS576854A true JPS576854A (en) 1982-01-13

Family

ID=13736877

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8109780A Pending JPS576854A (en) 1980-06-16 1980-06-16 Image reproduction method in copying machine

Country Status (1)

Country Link
JP (1) JPS576854A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4670293A (en) * 1983-07-29 1987-06-02 Sanyo Electric Co., Ltd. Method of making semiconductor film
EP0225456A2 (en) * 1985-10-31 1987-06-16 Stork Colorproofing B.V. Method of image reversal in color electrophotography

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4670293A (en) * 1983-07-29 1987-06-02 Sanyo Electric Co., Ltd. Method of making semiconductor film
EP0225456A2 (en) * 1985-10-31 1987-06-16 Stork Colorproofing B.V. Method of image reversal in color electrophotography

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