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:
May. 11, 2010
Filed:
Sep. 10, 2007
Applicants:
Junroh Uda, Kanagawa, JP;
Sadayuki Iwai, Kanagawa, JP;
Inventors:
Junroh Uda, Kanagawa, JP;
Sadayuki Iwai, Kanagawa, JP;
Assignee:
Ricoh Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/02 (2006.01); G03G 21/16 (2006.01); G03G 15/01 (2006.01); G03G 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An image forming apparatus includes a plurality of toner-image forming units. Each toner-image forming unit includes a photosensitive drum and a charging unit that is arranged to abut against or remain detached from the photosensitive drum, and that electrically charges the photosensitive drum. Each of the toner-image forming units forms an image of a different color. At least one of the charging units functions as a corona charging unit and at least another one of the charging units functions as a non-contact charging unit.