JPS56156849A - Method and device for regular copying and reversal copying - Google Patents

Method and device for regular copying and reversal copying

Info

Publication number
JPS56156849A
JPS56156849A JP6114280A JP6114280A JPS56156849A JP S56156849 A JPS56156849 A JP S56156849A JP 6114280 A JP6114280 A JP 6114280A JP 6114280 A JP6114280 A JP 6114280A JP S56156849 A JPS56156849 A JP S56156849A
Authority
JP
Japan
Prior art keywords
photoreceptor
positive
picture
exposed
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
JP6114280A
Other languages
Japanese (ja)
Inventor
Itsuro Ando
Koichi Saito
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
Priority to JP6114280A priority Critical patent/JPS56156849A/en
Publication of JPS56156849A publication Critical patent/JPS56156849A/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
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/169—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer with means for preconditioning the toner image before the transfer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)

Abstract

PURPOSE:To obtain a good positive picture from negative and positive originals, by providing a means which switches uniform exposure of the photoreceptor surface before and after transfer. CONSTITUTION:Reversal copying to obtain a positive picture from the negative picture is explained below in the figure. The photoreceptor including insulating layer 3 is charged negatively by charger 4 and has positive charge discharged by charger 8. The potential approximately equal to that of the nonexposed part of the photoreceptor is applied to developing cylinder 14 to develop the photoreceptor. After transfering onto the transfer paper due to corotron 18, the photoreceptor is exposed to light uniformly by rear exposing lamp 21. In case that a positive picture is obtained from the positive original, switch 12 is turned off in respect to chargers. At the developing time, developing cylinder 14 is grounded or the bias voltage approximately equal to that of the exposed part of the photoreceptor is applied to stick toner 15 to the nonexposed part. Next, the photoreceptor is exposed to light uniformly by front exposing lamp 28 and is transferred to the transfer paper by corotron 18. Switch 23 for rear exposure is turned off.
JP6114280A 1980-05-08 1980-05-08 Method and device for regular copying and reversal copying Pending JPS56156849A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6114280A JPS56156849A (en) 1980-05-08 1980-05-08 Method and device for regular copying and reversal copying

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6114280A JPS56156849A (en) 1980-05-08 1980-05-08 Method and device for regular copying and reversal copying

Publications (1)

Publication Number Publication Date
JPS56156849A true JPS56156849A (en) 1981-12-03

Family

ID=13162545

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6114280A Pending JPS56156849A (en) 1980-05-08 1980-05-08 Method and device for regular copying and reversal copying

Country Status (1)

Country Link
JP (1) JPS56156849A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113449A (en) * 1982-12-20 1984-06-30 Minolta Camera Co Ltd Normal-reverse copying method
JPS62284379A (en) * 1986-06-02 1987-12-10 Katsuragawa Denki Kk Improving method for repeat characteristic of photosensitive body in inverted image formation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113449A (en) * 1982-12-20 1984-06-30 Minolta Camera Co Ltd Normal-reverse copying method
JPH0557589B2 (en) * 1982-12-20 1993-08-24 Minolta Camera Kk
JPS62284379A (en) * 1986-06-02 1987-12-10 Katsuragawa Denki Kk Improving method for repeat characteristic of photosensitive body in inverted image formation

Similar Documents

Publication Publication Date Title
JPS5511222A (en) Dry type toner cleaning device
JPS5543564A (en) Electrophotographic copying method
JPS56156849A (en) Method and device for regular copying and reversal copying
JPS5557875A (en) Transfer type electrostatic copying machine
JPS5741671A (en) Copying device
JPS5774767A (en) Electrophotographic device
JPS5794770A (en) Cleaning method of electrophotographic photoreceptor
JPS56156848A (en) Regular copying and reversal copying method
JPS5774766A (en) Electrophotographic device
JPS57185072A (en) Picture stabilizing method for picture forming device
JPS57114153A (en) Electrophotographing method
JPS55111976A (en) Electrophotographic copier
JPS5773758A (en) Protector for screen-shaped photoreceptor
JPS5710151A (en) Preparation of montage image in copying machine
JPS54101323A (en) Electrophotographic copier
JPS55138766A (en) Magnetic brush developing method
JPS5722275A (en) Electrophotographic device
JPS5515151A (en) Electrophotographic method
JPS5768853A (en) Electrophotography device
JPS5587167A (en) Method and apparatus for electrophotography
JPS5741652A (en) Electronic printing method
JPS5636659A (en) Method for making plural copies
JPS54136334A (en) Electrophotographic image formation process by simultaneous static latent image transfer system
JPS5515176A (en) Electrophotographic copying method
JPS54137345A (en) Development for dichronic zerography