Xerox Corporation

William E Jordan

Edward L Steiner

Kenton W Fiske

An electrostatic reproduction machine has a belt assembly having a plurality of rollers for supporting and moving an endless photoconductive belt around a closed path. A tracking apparatus is used to detect and correct lateral movement of the belt as it moves around the rollers, and to return the belt to its normal course, the apparatus including (1) a sensing member for sensing the lateral movement of the belt as the latter moves around a first of the rollers, (2) structure for connecting the sensing member to a second of the rollers, the second roller being mounted to rotate about an axis in response to lateral movement of the belt to cause the belt to return to its normal course, and (3) a resilient member connected to both the connecting structure and stationary frame structure. The resilient member supports the entire weight of the sensing member and connecting structure, and causes the sensing member to return to its initial position after being displaced by lateral movement of the belt.

Tracking assembly for an endless belt electrostatic reproduction machine

A control system for one or more vacuum holddown devices for use in an apparatus employing flexible web material in a flattened condition. A plurality of perforated plenums are joined to a manifold connectible to a vacuum producing means. The pressure within the manifold is sensed and must be at a predetermined pressure before the drive system for the web material is activated thereby preventing bulging or buckling of the web material during startup and normal running of the material.

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Penfield, NY, United States of America

William E Jordan