JPS56133742A - Magnetic brush developing method - Google Patents

Magnetic brush developing method

Info

Publication number
JPS56133742A
JPS56133742A JP3777680A JP3777680A JPS56133742A JP S56133742 A JPS56133742 A JP S56133742A JP 3777680 A JP3777680 A JP 3777680A JP 3777680 A JP3777680 A JP 3777680A JP S56133742 A JPS56133742 A JP S56133742A
Authority
JP
Japan
Prior art keywords
development
gap
normal
cam
developing sleeve
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
JP3777680A
Other languages
Japanese (ja)
Inventor
Shoji Kondo
Shuichiro Kaneko
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP3777680A priority Critical patent/JPS56133742A/en
Publication of JPS56133742A publication Critical patent/JPS56133742A/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
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush

Abstract

PURPOSE:To stabilize image formation using high resistivity magnetic toner both in normal and reversal development and to prevent uneven density or the like, by changing the gap between a developing sleeve surface and a photreceptor surface at the times of normal development and reversal development. CONSTITUTION:Development gap control disc 7 larger by h1 than the inside radius of photoreceptor 3 is fixed to the driving shaft of receptor 3 in order to control the gap between the surface of developing sleeve 1 having magnetic roller 2 and the surface of receptor 3. Developing sleeve 1 is provided with gap control cam 6 and magnetic brush height control plate 8, energized to be pressed in the direction (g). Cam 6 is fixed so as not to rotate in developing, but at the time of change-over of normal development and reversal development, cam 6 is turned by 180 deg. in synchronism to developing bias change-over switch 4 to make the gap h1+h2 and the brush height h3, thus permitting the gap and the height to become smaller (h1+h2), (h3) in the normal development using a magnetic toner of 10<12>-1013OMEGA.cm resistivity, and both to be made larger in the reversal development, and good copy images to be formed in both the development.
JP3777680A 1980-03-24 1980-03-24 Magnetic brush developing method Pending JPS56133742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3777680A JPS56133742A (en) 1980-03-24 1980-03-24 Magnetic brush developing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3777680A JPS56133742A (en) 1980-03-24 1980-03-24 Magnetic brush developing method

Publications (1)

Publication Number Publication Date
JPS56133742A true JPS56133742A (en) 1981-10-20

Family

ID=12506878

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3777680A Pending JPS56133742A (en) 1980-03-24 1980-03-24 Magnetic brush developing method

Country Status (1)

Country Link
JP (1) JPS56133742A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60125657U (en) * 1984-02-02 1985-08-24 カシオ計算機株式会社 developing device
JPS62127848A (en) * 1985-11-29 1987-06-10 Hitachi Metals Ltd Reversal developing method
JPS63195674A (en) * 1987-02-10 1988-08-12 Matsushita Graphic Commun Syst Inc Electrophotographic recorder
JPS63243946A (en) * 1987-03-30 1988-10-11 Canon Inc Electrophotographic sensitive body
US5227848A (en) * 1992-02-04 1993-07-13 Eastman Kodak Company Developer flow rate regulation for an electrophotographic toning roller

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60125657U (en) * 1984-02-02 1985-08-24 カシオ計算機株式会社 developing device
JPS62127848A (en) * 1985-11-29 1987-06-10 Hitachi Metals Ltd Reversal developing method
JPH0448394B2 (en) * 1985-11-29 1992-08-06 Hitachi Metals Ltd
JPS63195674A (en) * 1987-02-10 1988-08-12 Matsushita Graphic Commun Syst Inc Electrophotographic recorder
JPS63243946A (en) * 1987-03-30 1988-10-11 Canon Inc Electrophotographic sensitive body
JPH0478985B2 (en) * 1987-03-30 1992-12-14 Canon Kk
US5227848A (en) * 1992-02-04 1993-07-13 Eastman Kodak Company Developer flow rate regulation for an electrophotographic toning roller

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