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. 08, 2008
Filed:
Jan. 14, 2005
Kohji Kamiya, Ohta-ku, JP;
Kyoichi Ashikawa, Ohta-ku, JP;
Norihiko Aze, Ohta-ku, JP;
Minoru Matsuo, Ohta-ku, JP;
Nozomu Takahata, Ohta-ku, JP;
Kohji Kamiya, Ohta-ku, JP;
Kyoichi Ashikawa, Ohta-ku, JP;
Norihiko Aze, Ohta-ku, JP;
Minoru Matsuo, Ohta-ku, JP;
Nozomu Takahata, Ohta-ku, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A method for evaluating a fixing belt includes forming a fixing belt which includes a substrate, an elastic layer laminated on the substrate, and a mold releasing layer laminated on the elastic layer. A universal hardness test for the fixing belt is performed. The fixing belt is judged as an acceptable product if a creep value Cis included within a range of 0.40≦C≦3.50 (%) when the universal hardness test is performed for the fixing belt and when the creep value C, which is measured from the side of the mold releasing layer, is defined by the following formula:-)/×100 (%)where his a pushed depth when a test load reaches a predetermined value which is kept for a predetermined period of time, and his a pushed depth when a predetermined period of time is elapsed after the test load is removed.