A sheet separator. The sheet separator includes a main body, a frictional member, and an elastic member. The main body is rotatable with a slot being longitudinally parallel to the moving direction of the medium. The frictional member is disposed in the slot and contacts the medium. When feeding, the...http://www.google.com/patents/US6883798?utm_source=gb-gplus-sharePatent US6883798 - Sheet feeder for media-feed mechanism
