Title:
現像ローラ及びその製造方法、現像装置並びに画像形成装置
Document Type and Number:
Japanese Patent JP3989180
Kind Code:
B2
Abstract:
A developing roller of the present invention is made up of a nonmagnetic sleeve and a magnet roller disposed in the sleeve. The magnet roller includes a cylindrical magnet produced by molding a mixture of magnetic powder and a high polymer, and a single rare-earth magnet block mounted on the magnet at a position corresponding to a main magnetic pole for development. The cylindrical magnet is magnetized such that magnetic poles adjoining the main magnetic pole are opposite in polarity to the main pole. The main pole and each pole adjoining it make an angle of 45° or less therebetween.
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| JP2023109501 | DEVELOPING DEVICE |
Inventors:
Tsuyoshi Imamura
Kamoi Sumio
Kyota Hizuka
Kamiya travelogue
Mieko Kakegawa
Tomohiro Atsumi
Kamoi Sumio
Kyota Hizuka
Kamiya travelogue
Mieko Kakegawa
Tomohiro Atsumi
Application Number:
JP2001047095A
Publication Date:
October 10, 2007
Filing Date:
February 22, 2001
Export Citation:
Assignee:
株式会社リコー
International Classes:
G03G15/09; H01F7/02
Domestic Patent References:
| JP6083203A | ||||
| JP2000323322A | ||||
| JP5323793A | ||||
| JP7319282A |
Attorney, Agent or Firm:
Fujita Akira