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:
May. 30, 2023
Filed:
Sep. 27, 2021
Kyocera Document Solutions Inc., Osaka, JP;
Hironori Daigo, Osaka, JP;
KYOCERA Document Solutions Inc., Osaka, JP;
Abstract
An image forming apparatus includes a photoelectric sensor and a controller. The photoelectric sensor emits light to an object to be detected, receives the light reflected on the object and outputs an electric signal corresponding to a quantity of the reflected light. The object includes a facing surface area and a sheet on the facing surface area. The controller detects whether the sheet exists on the facing surface area in accordance with an output of the photoelectric sensor. The controller stores, as a threshold of the output of the photoelectric sensor, a first threshold for determining that the sheet does not exist on the facing surface area and a second threshold for determining that the sheet exists on the facing surface area, and determines that the facing surface area is contaminated when the output of the photoelectric sensor is within a range between the first threshold and the second threshold.