JPS56161563A - Normal and reversal copying method - Google Patents

Normal and reversal copying method

Info

Publication number
JPS56161563A
JPS56161563A JP6405980A JP6405980A JPS56161563A JP S56161563 A JPS56161563 A JP S56161563A JP 6405980 A JP6405980 A JP 6405980A JP 6405980 A JP6405980 A JP 6405980A JP S56161563 A JPS56161563 A JP S56161563A
Authority
JP
Japan
Prior art keywords
positive
image
original
charger
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.)
Pending
Application number
JP6405980A
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 JP6405980A priority Critical patent/JPS56161563A/en
Publication of JPS56161563A publication Critical patent/JPS56161563A/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
    • G03G15/163—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 using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap
    • G03G15/1635—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 using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap the field being produced by laying down an electrostatic charge behind the base or the recording member, e.g. by a corona device

Abstract

PURPOSE:To obtain superior normal and reversal copied images using the same photoreceptor and the same developer, by overlaying a toner image on a transfer material and subjecting the backside of the transfer material to AC corona discharge selectively superposed with a DC voltage different in quantity and polarity from each other in accordance with the negative and positive originals, respectively. CONSTITUTION:A first charger 4, and a second charger 8 are installed in a photoreceptor formed by laminating a photoconductive layer 2 and an insulating layer 3 on a conductive substrate 1, and a positive image is transferred from a negative original or a positive original using a conductive magnetic developer 15. The photoreceptor is negatively charged with the charger 4, positively charged with the charger 5, then exposed 13 to an optidal original image, and subjected to AC corona discharge superposed with negative DC voltage from the backside of a transfer material with a corotron 18 for transfer to transfer a positive image from a negative original, whereas subjected to AC corona discharge superposed with positive DC voltage to transfer a positive image from a positive original, thus permitting a superior image having high density and good reproducibility to be obtained in both cases.
JP6405980A 1980-05-16 1980-05-16 Normal and reversal copying method Pending JPS56161563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6405980A JPS56161563A (en) 1980-05-16 1980-05-16 Normal and reversal copying method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6405980A JPS56161563A (en) 1980-05-16 1980-05-16 Normal and reversal copying method

Publications (1)

Publication Number Publication Date
JPS56161563A true JPS56161563A (en) 1981-12-11

Family

ID=13247133

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6405980A Pending JPS56161563A (en) 1980-05-16 1980-05-16 Normal and reversal copying method

Country Status (1)

Country Link
JP (1) JPS56161563A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6423269A (en) * 1987-07-20 1989-01-25 Canon Kk Image forming device
JPH01257989A (en) * 1988-04-08 1989-10-16 Fuji Xerox Co Ltd Transfer device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51951A (en) * 1974-06-20 1976-01-07 Canon Kk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51951A (en) * 1974-06-20 1976-01-07 Canon Kk

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6423269A (en) * 1987-07-20 1989-01-25 Canon Kk Image forming device
JPH01257989A (en) * 1988-04-08 1989-10-16 Fuji Xerox Co Ltd Transfer device

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