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. 29, 2014
Filed:
Mar. 15, 2011
Kazuhiko Watanabe, Tokyo, JP;
Keiji Okamoto, Kanagawa, JP;
Kazuhiko Watanabe, Tokyo, JP;
Keiji Okamoto, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A cleaning device includes a laminated blade member including multiple layers made of materials different in permanent set value and a holding member to hold the blade member. The multiple layers include an edge layer formed of a material higher in permanent set value among the materials and a backing layer disposed against a distal surface of the edge layer. The laminated blade member includes a leading edge where an edge portion of the edge layer contacting a cleaning target is located and a trailing edge where the holding member supports the blade member. A ratio of a thickness of the edge layer to a thickness of the backing layer at the trailing end of the blade member is smaller than a ratio thereof at the leading edge of the blade member.