JPS5779970A - Two color developing device of electrophotography - Google Patents

Two color developing device of electrophotography

Info

Publication number
JPS5779970A
JPS5779970A JP55156229A JP15622980A JPS5779970A JP S5779970 A JPS5779970 A JP S5779970A JP 55156229 A JP55156229 A JP 55156229A JP 15622980 A JP15622980 A JP 15622980A JP S5779970 A JPS5779970 A JP S5779970A
Authority
JP
Japan
Prior art keywords
points
magnet groups
magnet
graph
magnetic
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
JP55156229A
Other languages
Japanese (ja)
Inventor
Fuyuhiko Matsumoto
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 JP55156229A priority Critical patent/JPS5779970A/en
Publication of JPS5779970A publication Critical patent/JPS5779970A/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
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0105—Details of unit
    • G03G15/0126—Details of unit using a solid developer

Landscapes

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

Abstract

PURPOSE:To prevent disturbance of the previously developed image by later processes by differing the intensities of the main pole magnets of the magnet groups provided in developing sleeves of two developing devices of a magnetic brush system. CONSTITUTION:The 1st, 2nd developing sleeves 6b, 7b are provided to the 1st, 2nd developing devices 6, 7, and have the 1st, 2nd magnet groups respectively therein. Of these magnets included in these magnet groups, main pole magnets 6c, 7c are provided in the positions opposite to a photosensitive drum 1. In order to make the magnetic brush formed on the 2nd sleeve 7b much softer, the magnetic flux distribution by the magnet 7c is so formed as to have crests and troughes as shown in the graph, so that the magnetic brushes corresponding to between the points A, B, the points C, D and the points E, F in the graph are formed softer than those in the prior art.
JP55156229A 1980-11-06 1980-11-06 Two color developing device of electrophotography Pending JPS5779970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55156229A JPS5779970A (en) 1980-11-06 1980-11-06 Two color developing device of electrophotography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55156229A JPS5779970A (en) 1980-11-06 1980-11-06 Two color developing device of electrophotography

Publications (1)

Publication Number Publication Date
JPS5779970A true JPS5779970A (en) 1982-05-19

Family

ID=15623176

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55156229A Pending JPS5779970A (en) 1980-11-06 1980-11-06 Two color developing device of electrophotography

Country Status (1)

Country Link
JP (1) JPS5779970A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3739255A1 (en) * 1986-11-18 1988-06-30 Fuji Xerox Co Ltd IMAGE RECORDING METHOD
JPS63254471A (en) * 1987-04-13 1988-10-21 Fuji Xerox Co Ltd Color image recording method
US4833505A (en) * 1987-01-23 1989-05-23 Fuji Xerox Co., Ltd. Latent image color developing system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5552071A (en) * 1978-09-22 1980-04-16 Ricoh Co Ltd Developing device of electrophotography

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5552071A (en) * 1978-09-22 1980-04-16 Ricoh Co Ltd Developing device of electrophotography

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3739255A1 (en) * 1986-11-18 1988-06-30 Fuji Xerox Co Ltd IMAGE RECORDING METHOD
US4833505A (en) * 1987-01-23 1989-05-23 Fuji Xerox Co., Ltd. Latent image color developing system
JPS63254471A (en) * 1987-04-13 1988-10-21 Fuji Xerox Co Ltd Color image recording method

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