The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 15, 2006
Filed:
Dec. 26, 2001
Katsuhiko Suzuki, Ibaraki, JP;
Masami Ishikawa, Ibaraki, JP;
Tsuneaki Kawanishi, Ibaraki, JP;
Teruaki Mitsuya, Ibaraki, JP;
Hisao Okada, Ibaraki, JP;
Masayoshi Ishii, Ibaraki, JP;
Katsuhiko Suzuki, Ibaraki, JP;
Masami Ishikawa, Ibaraki, JP;
Tsuneaki Kawanishi, Ibaraki, JP;
Teruaki Mitsuya, Ibaraki, JP;
Hisao Okada, Ibaraki, JP;
Masayoshi Ishii, Ibaraki, JP;
Ricoh Printing Systems, Ltd., Tokyo, JP;
Abstract
In an image forming method, when viewed from the moving direction of a photosensitive bodythere is disposed, on the upstream side, a first developing rolleropposed to and adjacent to the photosensitive bodyand rotatable in the opposite direction to the photosensitive bodywhile the peripheral speed ratio of the rollerto the photosensitive bodyranges from 0.8 to 2.0; on the downstream side of the rollerthere is disposed a second developing rollerrotatable in the same direction to the photosensitive bodywhile the peripheral speed ratio of the rollerto the photosensitive bodyranges from 1.05 to 2.0; and the shape coefficient SFof the toners of two-component developing agent ranges from 120 to 170, while the shape coefficient SFranges from 110 to 130.