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:
Nov. 30, 2010
Filed:
Sep. 28, 2007
Sho Sawahata, Ibaraki, JP;
Yuji Ohmura, Ibaraki, JP;
Yoshikuni Sasaki, Ibaraki, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
According to an aspect of the present invention, there is provided a fixing apparatus including: a heat roller that includes: a heat source that generates heat to be supplied on a toner image formed on a recording medium; a cylindrical core; a rubber layer that is formed on the cylindrical core and includes a thermal-conductivity-enhanced rubber, the rubber layer having a thickness of Tg that satisfies 200 μm≦Tg≦600 μm and having a rubber hardness defined by JIS-A hardness of Hg that satisfies 40 degrees≦Hg≦80 degrees; and a fluororesin layer that is formed on the rubber layer, the fluororesin layer having a thickness of Tj that satisfies 80 μm≦Tj≦300 μm and 2 Tj≦Tg≦10 Tj; and a pressure roller that presses the recording medium against the heat roller.