JPS5484727A - Developing method in electrophotography - Google Patents

Developing method in electrophotography

Info

Publication number
JPS5484727A
JPS5484727A JP15257777A JP15257777A JPS5484727A JP S5484727 A JPS5484727 A JP S5484727A JP 15257777 A JP15257777 A JP 15257777A JP 15257777 A JP15257777 A JP 15257777A JP S5484727 A JPS5484727 A JP S5484727A
Authority
JP
Japan
Prior art keywords
photoreceptor
constant current
roller
developer
flowed
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
JP15257777A
Other languages
Japanese (ja)
Inventor
Mitsuo Hasebe
Koichi Noguchi
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 JP15257777A priority Critical patent/JPS5484727A/en
Publication of JPS5484727A publication Critical patent/JPS5484727A/en
Pending legal-status Critical Current

Links

Landscapes

  • Developing For Electrophotography (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE: To form developed images of an even density despite variations in the surface potential of photoreceptor by flowing a constant current to a developer feed members in the bias developing of a dry type magnetic brush developing method of electrophotographic copying.
CONSTITUTION: Grounded earth rollers 7, 8 are contacted to the substrate 5 on the upper back of a photoreceptor 4 which is formed of a photoconductor layer 6 and the conductive substrate 5 and is run leftward. A permanent magnet 9 is disposed between the rollers 7, 8. A developing roller 12 composed of conductive magnetic material which carries and rotates developer 14 is disposed in the lower part of the lower photoconductor layer 6 of the photoreceptor 6. A magnetical closed loop is formed between this roller and the permanent magnet 9 and further a constant current is flowed to the developer 4 between the roller 12 and the photoreceptor 5. Namely, with the constant current circuit as the one shown in the figure being used, its terminal 20 is connected to the roller 12 and terminal 21 is grounded, than a constant current is flowed to the developer even if the potential of the electrostatic latent images on the photoreceptor 5 changes thereby making its bristling constant and evening the developed image density.
COPYRIGHT: (C)1979,JPO&Japio
JP15257777A 1977-12-19 1977-12-19 Developing method in electrophotography Pending JPS5484727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15257777A JPS5484727A (en) 1977-12-19 1977-12-19 Developing method in electrophotography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15257777A JPS5484727A (en) 1977-12-19 1977-12-19 Developing method in electrophotography

Publications (1)

Publication Number Publication Date
JPS5484727A true JPS5484727A (en) 1979-07-05

Family

ID=15543504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15257777A Pending JPS5484727A (en) 1977-12-19 1977-12-19 Developing method in electrophotography

Country Status (1)

Country Link
JP (1) JPS5484727A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597973A (en) * 1982-06-28 1984-01-17 ゼロツクス・コ−ポレ−シヨン Developer for electrophotographic copying machine
JPS6132076A (en) * 1984-07-24 1986-02-14 Mita Ind Co Ltd Developing device for ferrite compound developer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597973A (en) * 1982-06-28 1984-01-17 ゼロツクス・コ−ポレ−シヨン Developer for electrophotographic copying machine
JPS6132076A (en) * 1984-07-24 1986-02-14 Mita Ind Co Ltd Developing device for ferrite compound developer
JPH0585907B2 (en) * 1984-07-24 1993-12-09 Mita Industrial Co Ltd

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