Patent ID: 6461066
Filing Date: 2002-10-08
Classification: B65H

Abstract:
A printer with a media feed apparatus comprising:a media tray having an upper media stack support surface for supporting a media stack; a feed roller for receiving a top sheet of the media stack; a wave drive mechanism comprising a pair of spaced apart wheels, a belt looped around the spaced apart wheels, and a plurality of freewheeling rollers, each one of said freewheeling rollers having an axis attached to and moving with the belt, wherein at least one of the plurality of freewheeling rollers makes contact with the top sheet in the tray while the belt moves the axis of said at least one freewheeling roller in a feed direction to shift the top sheet in the feed direction; and a sensor which detects motion of the top sheet within the tray at least during a time while the wave drive mechanism moves the sheet in the feed direction prior to the top sheet being received by the feed roller.