JPS56156850A - Method and device for regular copying and reversal copying - Google Patents

Method and device for regular copying and reversal copying

Info

Publication number
JPS56156850A
JPS56156850A JP6114380A JP6114380A JPS56156850A JP S56156850 A JPS56156850 A JP S56156850A JP 6114380 A JP6114380 A JP 6114380A JP 6114380 A JP6114380 A JP 6114380A JP S56156850 A JPS56156850 A JP S56156850A
Authority
JP
Japan
Prior art keywords
positive
copying
photoreceptor
reversal
negative
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.)
Granted
Application number
JP6114380A
Other languages
Japanese (ja)
Other versions
JPS6259306B2 (en
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 JP6114380A priority Critical patent/JPS56156850A/en
Publication of JPS56156850A publication Critical patent/JPS56156850A/en
Publication of JPS6259306B2 publication Critical patent/JPS6259306B2/ja
Granted 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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0266—Arrangements for controlling the amount of charge

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)

Abstract

PURPOSE:To obtain a good positive picture from negative and positive originals, by insulating the charging device from other devices at the regular copying time and by grounding the charging device at the reversal copying time. CONSTITUTION:Reversal copying to obtain a positive picture from the negative original is explained below in the figure. The photoreceptor consisting of conductive substrate 1, photoconductive layer 2, and insulating layer 3 is charged negatively by the first charger 4 and has positive charge discharged by charger 8 to erase negative charge. Switch 12 is turned on. The bias potential approximately equal to the potential of the nonexposed part of the photoreceptor is applied to developing cylinder 14 from power source 17 to stick conductive magnetic toner 15 to the exposed part. In case that a positive picture is obtained from the positive original, shields 6 and 10 of chargers are connected mutually and are connected to the other ends of respective power sources, and switch 12 is turned off. 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.
JP6114380A 1980-05-08 1980-05-08 Method and device for regular copying and reversal copying Granted JPS56156850A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6114380A JPS56156850A (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
JP6114380A JPS56156850A (en) 1980-05-08 1980-05-08 Method and device for regular copying and reversal copying

Publications (2)

Publication Number Publication Date
JPS56156850A true JPS56156850A (en) 1981-12-03
JPS6259306B2 JPS6259306B2 (en) 1987-12-10

Family

ID=13162573

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6114380A Granted JPS56156850A (en) 1980-05-08 1980-05-08 Method and device for regular copying and reversal copying

Country Status (1)

Country Link
JP (1) JPS56156850A (en)

Also Published As

Publication number Publication date
JPS6259306B2 (en) 1987-12-10

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