JPS57671A - Magnet roller - Google Patents

Magnet roller

Info

Publication number
JPS57671A
JPS57671A JP2165581A JP2165581A JPS57671A JP S57671 A JPS57671 A JP S57671A JP 2165581 A JP2165581 A JP 2165581A JP 2165581 A JP2165581 A JP 2165581A JP S57671 A JPS57671 A JP S57671A
Authority
JP
Japan
Prior art keywords
developer
poles
same polarity
zero
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
JP2165581A
Other languages
Japanese (ja)
Inventor
Katsunobu Yamamoto
Keitaro Yamashita
Masamichi Abe
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.)
Proterial Ltd
Original Assignee
Hitachi Metals 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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP2165581A priority Critical patent/JPS57671A/en
Publication of JPS57671A publication Critical patent/JPS57671A/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
    • G03G15/0921—Details concerning the magnetic brush roller structure, e.g. magnet configuration

Abstract

PURPOSE:To improve a developer scraping effect, to eliminate fatigue of the developer, and to facilitate rotation of a rotary cylinder, by reducing intensity of a magnetic field at the center of the 2 poles with the same polarity almost to zero in a magnet roller using permanent magnets. CONSTITUTION:A hollow cylindrical part 9 is formed in the center of a shaft 8 made of a nonmagnetic material such as aluminum in order to reduce a copying machine in weight. A block magnet 10 having a ferromagnetic yoke 11 on its surface is provided on the outer circumference of the shaft 8 at the position in which 2 poles of the same polarity face each other in order to prevent occurrence of a magnetic pole there and to reduce a magnetic flux there almost to zero. In such a magnetic roller, a magnetic flux between the 2 same polarity poles is near zero, permitting a developer scraping effect to be remarkably improved, fatigue of the developer to be eliminated, and rotation of the rotary cylinder to be made extremely easy.
JP2165581A 1981-02-17 1981-02-17 Magnet roller Pending JPS57671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2165581A JPS57671A (en) 1981-02-17 1981-02-17 Magnet roller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2165581A JPS57671A (en) 1981-02-17 1981-02-17 Magnet roller

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP14903277A Division JPS5480755A (en) 1977-12-12 1977-12-12 Xerographic developing magnet roll

Publications (1)

Publication Number Publication Date
JPS57671A true JPS57671A (en) 1982-01-05

Family

ID=12061057

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2165581A Pending JPS57671A (en) 1981-02-17 1981-02-17 Magnet roller

Country Status (1)

Country Link
JP (1) JPS57671A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002229B1 (en) * 1977-11-30 1982-08-11 Ricoh Company, Ltd Sheet feed apparatus
JPH0525460U (en) * 1991-09-11 1993-04-02 鐘淵化学工業株式会社 Magnettrol

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002229B1 (en) * 1977-11-30 1982-08-11 Ricoh Company, Ltd Sheet feed apparatus
JPH0525460U (en) * 1991-09-11 1993-04-02 鐘淵化学工業株式会社 Magnettrol

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