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:
Jun. 03, 2008
Filed:
Jul. 05, 2005
Masami Takeda, Mishima, JP;
Masami Takeda, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The sheet material identification apparatus, includes a sensor adapted to bring a probe having a built-in piezoelectric element into contact with a surface of sheet material being conveyed, and thereby to generate electric detection signals corresponding with irregularities of the sheet material surface; an identification part adapted to identify types of sheet material based on detection signals outputted from the above described sensor; and a correct part adapted to correct fluctuations in detection features of the above described sensor based on detection output of the above described sensor at the time when the above described sensor has detected correction sheet material having a predetermined surface roughness. The appratus prevents misdetection during use for a long period of sheet material identification apparatus that does not require any type-of-paper selection setting operation by a user and can implement good heat treating, fixing and image forming efficiently even if sheets of paper having various kinds of surface roughness.