Encoding device for a moving web

Details Encoding device for a moving web Encoding device for a moving web

1997-08-08

1999-09-07

Grimley, Arthur T.

Electrophotography

Image formation

Photoconductive member

347 16, 399165, G03G 1500

Patent

active

059500514

ABSTRACT:
A device for encoding the position of a moving web, particularly a continuous photoreceptor belt in an electrophotographic printing apparatus, incorporates an encoding wheel for engaging an edge portion of the web, in combination with a long support member for supporting the remaining span of the web. Because the wheel is of a small width, the composite runout may be kept within acceptable limits for a lower cost compared to the long rollers of the prior art. The support member may include another roller for supporting the remaining span of the web or it may include a skid plate. The wheel can be manufactured within the required eccentricity and composite runout tolerances at a lower cost compared to prior art devices. The wheel can also be made with a larger diameter while the support roller can be of a compact construction to facilitate placement within the limited space in the printing device.

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