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:
Dec. 14, 2021
Filed:
Jul. 20, 2020
Toshihiro Yoshinuma, Kanagawa, JP;
Toshihiro Yoshinuma, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A heating device includes a heater to heat an object to be heated, a temperature detector to detect a surface temperature of the heater, a power calculator to calculate a power consumption of the heater, an abnormality detector to detect an abnormality of the temperature detector, and circuitry to cause the heater to increase the surface temperature of the heater from a first temperature to a second temperature higher than the first temperature; cause the power calculator to calculate the power consumption of the heater increased to the second temperature; cause the abnormality detector to compare the power consumption calculated by the power calculator and a predetermined threshold value; and cause the abnormality detector to determine that the temperature detector is abnormal when the power consumption calculated by the power calculator is equal to or larger than the predetermined threshold value.