JPS5741664A - Electrostatic printing and developing device - Google Patents

Electrostatic printing and developing device

Info

Publication number
JPS5741664A
JPS5741664A JP55116765A JP11676580A JPS5741664A JP S5741664 A JPS5741664 A JP S5741664A JP 55116765 A JP55116765 A JP 55116765A JP 11676580 A JP11676580 A JP 11676580A JP S5741664 A JPS5741664 A JP S5741664A
Authority
JP
Japan
Prior art keywords
master
potential
developing
printing
charging
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
JP55116765A
Other languages
Japanese (ja)
Inventor
Masami Yoshino
Kozo Oka
Fuminori Koide
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 JP55116765A priority Critical patent/JPS5741664A/en
Publication of JPS5741664A publication Critical patent/JPS5741664A/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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/065—Arrangements for controlling the potential of the developing electrode

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Developing For Electrophotography (AREA)

Abstract

PURPOSE:To obtain copies of superior gradation characteristic free from photographing fogs by providing an alternate biasing means in such a way that the bias potential at the printing for obtaining plural sheets of copies from a master is made higher in absolute potential than that at the time of making the master and is applied to a developing roller. CONSTITUTION:At the time of making a printing master, a bias electric power source E2 is applied to the developing roll of a developing device 5 by a biasing means 17 and the electrostatic latent images formed on the photosensitive paper 10 held on the drum 1 are developed. At the printing, the biasing electric power source E1 of said means 17 is applied on the developing roll, and developing is carried out. By using such different voltages, the potential of the electrostatic images obtained by charging and image exposing on the photosensitive paper and the potential of the electrostatic latent images obtained by charging and uniform exposure of the master plate are compensated, and the prints of superior gradation characteristic and less photographic fogs are obtained.
JP55116765A 1980-08-25 1980-08-25 Electrostatic printing and developing device Pending JPS5741664A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55116765A JPS5741664A (en) 1980-08-25 1980-08-25 Electrostatic printing and developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55116765A JPS5741664A (en) 1980-08-25 1980-08-25 Electrostatic printing and developing device

Publications (1)

Publication Number Publication Date
JPS5741664A true JPS5741664A (en) 1982-03-08

Family

ID=14695172

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55116765A Pending JPS5741664A (en) 1980-08-25 1980-08-25 Electrostatic printing and developing device

Country Status (1)

Country Link
JP (1) JPS5741664A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53102746A (en) * 1977-02-21 1978-09-07 Ricoh Co Ltd Electrophotographic copying machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53102746A (en) * 1977-02-21 1978-09-07 Ricoh Co Ltd Electrophotographic copying machine

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