Patent ID: 8398075
Filing Date: 2013-03-19
Classification: B65H,G03G,H04N

Abstract:
1. An auto document feeder comprising: a lead path arranged to guide a document supplied from a first side of a read position to a second side thereof so as to read a first surface of the document; a reverse path connected to the lead path and arranged to reverse the document whose image information of the first surface has been read, and to guide the document from the second side of the read position to the first side thereof so as to read a second surface of the document; and an eject path connected to the reverse path and arranged to guide the document whose image information of the second surface has been read, so as to eject the document further to the second side than the read position; wherein the lead path includes a lead curve path which protrudes to the first side and is arranged further to the first side than the read position; the lead path and the eject path share a portion of their paths including a shared curve path; the shared curve path includes at least a portion that extends between the read position and a portion of the lead curve path that protrudes furthest to the first side such that the shared curve path includes the portion of the lead curve path that protrudes furthest to the first side; a transport roller arranged to have switchable directions of rotation is provided on the shared curve path; and the transport roller rotates in one direction when guiding the document from the shared curve path to the read position and rotates in the other direction when guiding the document from the read position to the shared curve path.