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:
May. 28, 2013
Filed:
Apr. 02, 2010
Yung-tai Pan, Taipei, TW;
Chien-kuo Kuan, Taipei, TW;
Yi-liang Chen, Taipei, TW;
Ping-hung Kuo, Taipei, TW;
Yung-Tai Pan, Taipei, TW;
Chien-Kuo Kuan, Taipei, TW;
Yi-Liang Chen, Taipei, TW;
Ping-Hung Kuo, Taipei, TW;
Primax Electronics, Ltd., Taipei, TW;
Abstract
An automatic document feeder includes a sheet input tray, a transfer channel, a sheet pick-up module, a retard roller, a thickness detecting module and a controlling unit. When the sheet pick-up module is driven, the documents placed on the sheet input tray are fed into the transfer channel. The thickness detecting module is used for detecting a thickness of the documents. The controlling unit is used for judging whether a multiple-feeding event occurs. In a case that the multiple-feeding event occurs, the sheet pick-up module is reversely rotated such that the documents are returned to the sheet input tray. When the sheet pick-up module is reversely rotated, the retard roller provides a lower frictional force, so that the documents are allowed to be returned to the sheet input tray.