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:
Jul. 23, 2013
Filed:
Jul. 26, 2007
Yoshitaka Kokubo, Susono-shi, JP;
Yoshitaka Kokubo, Susono-shi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
When a trailing edge detection sensor is affected by toner, dust, etc. adhered on an optical path thereof or when the sensor fails, malfunction of the apparatus is prevented from happening by measuring the size of a record material only with a unit for detecting a leading edge. The image forming apparatus has a unit for leading edge detection adapted to detect the leading edge of the record material and a unit for trailing edge detection adapted to detect the trailing edge of the record material, and is configured to, when the unit for trailing edge detection falls in detection capability or fails, form an image and measure the size of the record material only with the unit for leading edge detection.