Abstract: A document feeder includes advance, separation, and transport rollers for driving checks in turn along a feedpath from an input tray containing a stack of the checks A sensor is disposed between the separation and transport rollers for detecting presence of the checks therebetween. A controller is joined to the rollers for controlling speed thereof, and is operatively joined to the sensor for measuring intercheck gaps between the separation and transport rollers. The controller actively adjusts the intercheck gaps by temporarily changing speed of the separation roller at the beginning of the feedpath near the input tray. The intercheck gaps are measured and corrected between the separation and transport rollers for precise control thereof while maximizing throughput.

Abstract: A document feeder includes advance, separation, and transport rollers for driving checks in turn along a feedpath from an input tray containing a stack of the checks A sensor is disposed between the separation and transport rollers for detecting presence of the checks therebetween. A controller is joined to the rollers for controlling speed thereof, and is operatively joined to the sensor for measuring intercheck gaps between the separation and transport rollers. The controller actively adjusts the intercheck gaps by temporarily changing speed of the separation roller at the beginning of the feedpath near the input tray. The intercheck gaps are measured and corrected between the separation and transport rollers for precise control thereof while maximizing throughput.

Abstract: An actuator mechanism for positioning first and second reference members relative to first and second optical axes for use by first and second imaging devices or cameras which are used to image the front and rear sides of a document. A single solenoid is used to move or rotate the first and second reference members into the appropriate positions. A special actuator member which pivots on the operating plunger of the solenoid is used to provide an extra increment of rotation to enable the accurate location of the first and second references members relative to the first and second optical axes mentioned.