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:
Sep. 17, 2013
Filed:
Mar. 09, 2012
Ping-hung Kuo, Taipei, TW;
Ping-Hung Kuo, Taipei, TW;
Primax Electronics Ltd., Taipei, TW;
Abstract
An automatic document feeder includes a paper pick-up device, a transfer roller assembly, and a duplex feeding channel. The transfer roller assembly includes a shaft, a first roller, a second roller, a first idler, a second idler, and a power-coupling device. When the power-coupling device is connected with the shaft and the first roller for transmitting a paper, the first roller is driven to be rotated by the shaft. When the front edge of the paper is moved to the second roller, the first roller is driven to be rotated at a higher speed by the paper. Consequently, a power connection between the first roller and the shaft is released by the power-coupling device. Then, the first roller reaches a static status in order to correct the skew phenomenon of a next paper.