Invention Grant
- Patent Title: Thermal fixing device and image forming apparatus including same which detects the speed of a belt on the outer surface of a fixing member
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Application No.: US13049330Application Date: 2011-03-16
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Publication No.: US08577232B2Publication Date: 2013-11-05
- Inventor: Satoshi Ueno , Masanao Ehara , Tadashi Ogawa , Hiroshi Seo , Takamasa Hase , Shuutaroh Yuasa
- Applicant: Satoshi Ueno , Masanao Ehara , Tadashi Ogawa , Hiroshi Seo , Takamasa Hase , Shuutaroh Yuasa
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2010-058724 20100316
- Main IPC: G03G15/20
- IPC: G03G15/20
Abstract:
A thermal fixing device includes a fixing member, a flexible endless belt, a flexible endless belt, a rotary pressure member, a heating unit, and a rotation detector. The flexible endless belt is disposed on an outer circumferential surface of the fixing member. The rotary pressure member is disposed parallel to and pressing against the fixing member via the endless belt. The heating unit heats the endless belt. The rotation detector detects a rotation speed of the endless belt. The heating unit is powered off when the rotation speed of the endless belt detected by the rotation detector is at or below a predetermined threshold value.
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