Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1976-03-25
1977-06-07
Moses, R. L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
198806, 355 3R, G03G 1500
Patent
active
040279669
ABSTRACT:
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.
REFERENCES:
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patent: 3161283 (1964-12-01), Knab et al.
patent: 3368665 (1968-02-01), Jinkins
patent: 3435693 (1969-04-01), Wright et al.
patent: 3540571 (1970-11-01), Morse
patent: 3545599 (1970-12-01), Smith et al.
patent: 3702131 (1972-11-01), Stokes et al.
patent: 3726588 (1973-04-01), Moser
patent: 3818391 (1974-06-01), Jordon et al.
Moses R. L.
Reichert Earl T.
Xerox Corporation
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