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. 13, 2012
Filed:
May. 11, 2010
Applicants:
Chia-tsui Lan, Taipei, TW;
Ping-hung Kuo, Taipei, TW;
Yi-liang Chen, Taipei, TW;
Inventors:
Assignee:
Primax Electronics, Ltd., Taipei, TW;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B65H 3/52 (2006.01);
U.S. Cl.
CPC ...
Abstract
A retard roller and a retard roller module are provided. The retard roller is used in an automatic document feeder for providing a frictional force to separate plural documents from each other. Unidirectional rotation of the retard roller is permitted. Due to the unidirectional rotation, the contact surface of the retard roller can be switched. During the sheet-feeding process, the document is contacted with a specified contact surface. By rotating the retard roller, the document is contacted with another contact surface.