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:
Jul. 02, 2002
Filed:
May. 11, 2000
Shinya Yamamoto, Numazu, JP;
Hiroshi Sasame, Numazu, JP;
Tetsuya Kobayashi, Numazu, JP;
Kouji Hashimoto, Shizuoka-ken, JP;
Yasunari Watanabe, Shizuoka-ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A developing apparatus has a developer bearing member for bearing and carrying a nonmagnetic developer, a layer thickness regulating member for regulating a layer thickness of the developer borne by the developer bearing member, developing bias applying device for applying an alternating current voltage to the developer bearing member, and regulating member bias applying device for applying a direct current voltage to the layer thickness regulating member, and wherein |DC |>|DC | is satisfied when DC is an effective value of the alternating current voltage applied to the developer bearing member and DC is a value of the direct current voltage applied to the layer thickness regulating member, the direct current voltage value DC has a polarity, which is reverse to a charging polarity of the developer with respect to the effective value DC