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. 27, 2012
Filed:
Jun. 01, 2010
Masafumi Kamei, Kashiwa, JP;
Masafumi Kamei, Kashiwa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
When an original conveying unit that rotates about a rotation centerreaches an opening angle, an image is read using a line sensor, and a detected object is determined as being white dust on a platen glass. When it further reaches an opening angle, an image is again read using the line sensor, and a detected object is determined as being black dust on the platen glass. When it further reaches an opening angle, an image is again read using the line sensor, and a detected object is determined as being dust on a reference white plate with which the original conveying unit is provided in a state of facing a reading position where the line sensor performs reading.