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:
Aug. 28, 2018
Filed:
Dec. 30, 2016
Keitaro Shoji, Kanagawa, JP;
Yasunori Ishigaya, Kanagawa, JP;
Kazuya Saito, Kanagawa, JP;
Ryohei Matsuda, Kanagawa, JP;
Hiromasa Takagi, Tokyo, JP;
Ryuuichi Mimbu, Kanagawa, JP;
Toshihiko Shimokawa, Kanagawa, JP;
Keitaro Shoji, Kanagawa, JP;
Yasunori Ishigaya, Kanagawa, JP;
Kazuya Saito, Kanagawa, JP;
Ryohei Matsuda, Kanagawa, JP;
Hiromasa Takagi, Tokyo, JP;
Ryuuichi Mimbu, Kanagawa, JP;
Toshihiko Shimokawa, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A fixing device includes an endless fixing belt that is multilayered, an opposing rotator disposed opposite the fixing belt and pressed to the fixing belt to form a nip, a heater disposed inside the fixing belt, and a safety device including a contactless temperature sensor disposed outside the fixing belt and apart from an outer face of the fixing. The fixing belt is to rotate and thermally expand. The contactless temperature sensor detects a temperature of the fixing belt. The safety device stops heating by the heater when the temperature detected by the contactless temperature sensor is at or higher than a predetermined temperature. As the outer face of the fixing belt shifts outward in the radial direction due to thermal, a proportion of the outer face of the fixing belt in a viewing angle of the contactless temperature sensor increases.