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. 11, 2025
Filed:
Sep. 11, 2023
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Hiroshi Ota, Ota Tokyo, JP;
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Abstract
According to one embodiment, a fixing device includes a fuser including a fixing member with a surface to contact a printable medium and a heat source for heating the fixing member. A temperature sensor is provided having a sensing part that contacts the surface of the fixing member. A heater control circuit is configured to estimate a temperature of the surface of the fixing member based on a temperature measured by the sensing part of the temperature sensor. A memory is provided for storing estimated temperature values obtained over a prior time period by the heater control circuit. A controller is configured to determine whether there is an abnormality in the fixing device based on a difference between a maximum value and a minimum value of the estimated temperature values stored in the memory.