Patent ID: 7249763

Claim:
A document processing system for feeding and transporting documents, the system comprising: a feeder stage including a hopper assembly and a feeder wherein the feeder acts to feed documents singly, in order, from a stack of documents in the hopper assembly; a transport stage downstream of the feeder stage for receiving the fed documents, the transport stage including a document track composed of a pair of opposing rigid track walls wherein, during transportation, the documents are moved along the document track in a series to allow operations to be performed on the documents; a retractable document handling mechanism cooperating with a portion of the document track and including a movable base member which carries one side of the document track and a fixed base member that carries the other side of the document track; at least one pinch roller affixed to the movable base member; an assertable member configured such that assertion causes retraction of the opposing track walls in the cooperating portion of the document track by retracting the movable base member, thereby providing access to the document track, the retraction being sufficient to provide a track opening sufficient to allow the operator to relieve document jams; wherein the retraction motion of the movable base member is linear such that the opposed track walls remain aligned with each other during opening and closing of the document track to provide a repeatable precise closed position; wherein the at least one pinch roller engages the documents when the document handling mechanism is in the closed state; wherein the at least one pinch roller is retracted to provide access to the document track when the document handling mechanism is in the retracted state; a precision locating device affixed to the movable base; a mating component on the fixed base such that the mating component interlocks with the precision locating device when the track is in the closed state; wherein the precision locating device and the mating component comprise a pin and groove arrangement; and wherein the precision locating device includes a connecting rod and includes the pin, and wherein the mating component includes a wear plate including the groove, the wear plate defining a slot through which the connecting rod extends, the slot being linear to cause the retraction motion of the movable base member to follow a linear path during retraction while providing the repeatable precise closed position.