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:
Apr. 15, 2008
Filed:
Mar. 29, 2007
Applicants:
Katsuya Nagamochi, Tokyo, JP;
Yoshikatsu Kamisuwa, Tokyo, JP;
Inventors:
Katsuya Nagamochi, Tokyo, JP;
Yoshikatsu Kamisuwa, Tokyo, JP;
Assignees:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba TEC Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/00 (2006.01); G03G 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The residual potential and charging potential of the surface of a photosensitive drumor the charging potential and exposure potential of the surface of the photosensitive drumare detected by an exposure sensorThe lifetime of the photosensitive drumis judged in accordance with the difference between the detected charging potential and residual potential, or the difference between the detected charging potential and exposure potential.