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. 07, 2009
Filed:
Oct. 10, 2006
Applicant:
Masahiko Kato, Kanagawa, JP;
Inventor:
Masahiko Kato, Kanagawa, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A cleaning unit for an image forming apparatus of the present invention includes removing means made up of a cleaning blade configured to remove toner particles left on the surface of an image carrier in contact with the image carrier and a blade holder holding the cleaning blade. Assuming that the cleaning blade has a natural frequency of fc and that the image carrier has a speed variation frequency of fd ascribable to rotation thereof, a range other than a range represented by the following relation is selected: