公开(公告)号：US20180208421A1

公开(公告)日：2018-07-26

申请号：US15414796

申请日：2017-01-25

Applicant: Foxlink Image Technology Co., Ltd.

Inventor： You-Chung Chou ,  Kuan Cheng Huang ,  Yung Kai Chen

IPC: B65H7/20 ,  B65H7/14 ,  B65H3/06 ,  B65H5/06

CPC classification number: B65H7/20 ,  B65H3/06 ,  B65H5/062 ,  B65H7/14 ,  B65H2511/33 ,  B65H2513/10 ,  B65H2513/514 ,  B65H2553/51 ,  B65H2553/82 ,  B65H2801/39 ,  B65H2220/01 ,  B65H2220/03 ,  B65H2220/02

Abstract: A paper feeding device includes a motor, a pickup roller assembly, a velocity sensor and a feeding roller assembly. The pickup roller assembly is driven by the motor for picking up the papers. The velocity sensor is mounted to the pickup roller assembly for detecting rotating speeds of the pickup roller assembly so as to detect speeds of feeding forward the papers. The feeding roller assembly is driven by the motor for continuing feeding forward the papers. A speed discrepancy will be generated between the rotating speed of the pickup roller assembly after the one of the papers is fed to the feeding roller assembly and the rotating speed of the pickup roller assembly which just picks up the one of the papers, when the speed discrepancy reaches a preset value set by the scanner, the scanner is triggered to start scanning.