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:
Jan. 12, 2016
Filed:
Dec. 31, 2012
Takuya Seshita, Kanagawa, JP;
Masahiko Satoh, Tokyo, JP;
Masaaki Yoshikawa, Tokyo, JP;
Hiroshi Yoshinaga, Chiba, JP;
Kenji Ishii, Kanagawa, JP;
Tadashi Ogawa, Tokyo, JP;
Takahiro Imada, Kanagawa, JP;
Hiromasa Takagi, Tokyo, JP;
Kazuya Saito, Kanagawa, JP;
Naoki Iwaya, Tokyo, JP;
Toshihiko Shimokawa, Kanagawa, JP;
Kensuke Yamaji, Kanagawa, JP;
Teppei Kawata, Kanagawa, JP;
Takamasa Hase, Shizuoka, JP;
Shuutaroh Yuasa, Kanagawa, JP;
Takeshi Uchitani, Kanagawa, JP;
Arinobu Yoshiura, Kanagawa, JP;
Hajime Gotoh, Kanagawa, JP;
Akira Suzuki, Tokyo, JP;
Ryota Yamashina, Kanagawa, JP;
Yasunori Ishigaya, Kanagawa, JP;
Takuya Seshita, Kanagawa, JP;
Masahiko Satoh, Tokyo, JP;
Masaaki Yoshikawa, Tokyo, JP;
Hiroshi Yoshinaga, Chiba, JP;
Kenji Ishii, Kanagawa, JP;
Tadashi Ogawa, Tokyo, JP;
Takahiro Imada, Kanagawa, JP;
Hiromasa Takagi, Tokyo, JP;
Kazuya Saito, Kanagawa, JP;
Naoki Iwaya, Tokyo, JP;
Toshihiko Shimokawa, Kanagawa, JP;
Kensuke Yamaji, Kanagawa, JP;
Teppei Kawata, Kanagawa, JP;
Takamasa Hase, Shizuoka, JP;
Shuutaroh Yuasa, Kanagawa, JP;
Takeshi Uchitani, Kanagawa, JP;
Arinobu Yoshiura, Kanagawa, JP;
Hajime Gotoh, Kanagawa, JP;
Akira Suzuki, Tokyo, JP;
Ryota Yamashina, Kanagawa, JP;
Yasunori Ishigaya, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A fixing device comprises a rotatable fixing member to apply heat to a recording medium bearing an unfixed image thereon, a heat source to heat the fixing member, and a rotatable pressing member pressing against the fixing member forming a nip therebetween. A driving source rotates and drives the fixing member and the pressing member. An overheat safety device has a relay to open and close a power supply path connected to the heat source. A temperature detector is connected to both the relay and the control unit to detect temperature of the fixing member. The overheat safety device turns off the relay and cuts off power supply to the heat source when the fixing member is overheated. The fixing member is allowed to radiate heat and cool down when the temperature detected by the temperature detector is more than a prescribed level.