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. 03, 2001
Filed:
Mar. 09, 2000
Katsuya Ota, Osaka, JP;
Masahiko Kobayashi, Osaka, JP;
Kyocera Mita Corporation, Osaka, JP;
Abstract
A developing device,has a cover member,for covering an upper part of a developing roller,. A seal,at a front end of the cover member,is brought into contact with a peripheral surface of a photosensitive drum,. When toner particles are accumulated in the vicinity of a front end of the seal,, the toner particles adhere to the photosensitive drum,, so that an undesirable black strip appears. Therefore, a voltage in a range from a developing bias to a potential at which the photosensitive drum,is charged is applied to a cover plate,of the cover member,. The seal,is at a high potential which is the same in polarity as the potential at which the photosensitive drum,is charged. Accordingly, no toner particles are accumulated at a front end of the seal,, so that no black stripe appears.