Patent ID: 7556253
Filing Date: 2009-07-07
Classification: B65H

Abstract:
1. An auto document feeder defining a feeding path, comprising: a base having a background under said feeding path; a frame mounted on said base and having a front wall located upon said feeding path, a first engaging base and a second engaging base formed on said front wall, a slot and a through hole opened on said front wall; a sensor device engaged to said frame, which has a base element defining opposite ends, a spring engaging portion projected from one end of said base element along axial direction of said base element, a fixing portion projected from the other end of said base element along axial direction of said base element and engaged with said second engaging base of said frame, a first engaging portion extended from said base element and coupled with said first engaging base of said frame, a second engaging portion extended from said base element and coupled with said second engaging base of said frame, and a sensor arm extended from said base element along radial direction of said base element, said sensor arm having a supporting portion located upon said feeding path, a sensor portion located in said feeding path and a sensor arranged at said sensor portion and faced to said background of said base and; a spring interconnected between said spring engaging portion of said sensor device and said slot and said through hole of said frame.