Patent ID: 8047533
Filing Date: 2011-11-01
Classification: B65H

Abstract:
1. An automatic document feeder for feeding plural documents, said automatic document feeder comprising: an upper cover having an inner surface; an input tray for placing said plural documents; a transfer channel; a guide plate disposed on and perpendicular to said upper cover of said inner surface for guiding said plural documents to move through said transfer channel, wherein said guide plate has a confining aperture, and said confining aperture comprises a fixing region and a releasing region, which are in communication with each other; a pick-up module for feeding said plural documents on said input tray into said transfer channel, wherein said pick-up module comprises a sustaining element; a stopper module for stopping said plural documents from entering said transfer channel, said stopper module comprising a stopping slice and a poking element, wherein said stopping slice has a protrusion inserted into said confining aperture, said poking element is disposed on said guide plate and connected with said stopping slice, and said poking element is rotatable with respect to said upper cover; and a stopping indentation for accommodating said stopping slice, wherein when said pick-up module is driven to move toward said input tray, said sustaining element of said pick-up module is sustained against said poking element and said stopping slice is moved by said poking element, so that said protrusion of said stopping slice is moved from said fixing region of said confining aperture to said releasing region to release said stopping slice, wherein after said pick-up module is in contact with a first document of said plural documents on said input tray, said first document is transported by said pick-up module to push said stopping slice, so that said first document is allowed to be fed into said transfer channel, and wherein when said pick-up module is driven to swing in a clockwise direction to be close to said input tray, said sustaining element of said pick-up module is sustained against said poking element and said stopping slice is moved by said poking element, so that said poking element is rotated in an anti-clockwise direction to have said protrusion move from said fixing region of said confining aperture to said releasing region, wherein after said pick-up module is in contact with said first document and said first document is transported by said pick-up module, said first document pushes said stopping slice to have said stopping slice detach from said stopping indentation, so that said first document is allowed to be fed into said transfer channel.