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:
Feb. 04, 1997
Filed:
Aug. 31, 1993
Michihisa Iguchi, Tokyo, JP;
Hiroshi Hashizume, Tokyo, JP;
Seiji Arai, Tokyo, JP;
Yoshiaki Okano, Tokyo, JP;
Chinobu Sakai, Tokyo, JP;
Hirotaka Fukuyama, Tokyo, JP;
Takahito Kabai, Tokyo, JP;
Kouichirou Satou, Tokyo, JP;
Tetsuya Nakamura, Tokyo, JP;
Satoshi Katagata, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Kabushiki Kaisha TEC, Shizuoka, JP;
Abstract
In a developing device for developing an electrostatic latent image formed on a photosensitive member in an electrophotographic apparatus, a developing roller and a developing blade are formed such that the hardness of the surface of the developing blade is higher than the hardness of the surface of the developing roller by 30 degrees or more in JIS-A hardness. The developing blade deforms and bites into the developing roller. Accordingly, the developing roller can be brought into tight contact with the developing blade, and a great frictional force is applied to the toner passing between the developing roller and blade to fully charge the toner.