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:
Jan. 01, 2008
Filed:
Sep. 23, 2005
Kazumasa Yasui, Arakawa-ku, JP;
Masaya Arakawa, Hiratsuka, JP;
Kazumasa Yasui, Arakawa-ku, JP;
Masaya Arakawa, Hiratsuka, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus is provided that prevents paper from being scratched by a peeling claw and reducing the curl amount of the paper to be re-fed to a lower level. The rotational speed of a fixing and discharging roller is adequately kept higher than the rotational speed of a heating roller so as not to allow image stain to be produced in a paper due to scratching by a peeling claw in a fixing unit. Simultaneously, the rotational speed of reverse feeding rollers is set slightly higher than the rotational speed of the heating roller at the time when an automatic duplex unit performs paper re-feeding. As a result, 'swelling' of the paper occurring in a reverse gate is eliminated by the reverse feeding roller which is rotated at a speed higher than the heating roller, thereby greatly reducing 'curl amount' remaining in the paper due to the “swelling”.