Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1981-03-19
1982-09-07
Prescott, Arthur C.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 3SH, 355 3FU, 355 14FU, 432 4, 432 11, 432 35, 432 60, 219216, G03G 1500, G03G 1522
Patent
active
043481027
ABSTRACT:
An electrographic apparatus by which powder images corresponding to electrostatic images can be formed on receiving material and fixed onto the receiving material by heat and contact is provided with a control system which regulates the quantity of receiving material transported to the fixing device per unit of time so as to keep the heat content of heated surface elements of the fixing device suited for the heat capacity of the receiving material even when receiving materials of different weights are used. The control system can also make the formation of either electrostatic or powder images dependent upon the existance of heat content in the fixing device suited for the heat capacity of the receiving material. In an apparatus employing sheets as the receiving material and providing fixed time intervals for consecutive formations of electrostatic or powder images and for transport of sheets to receive the respective powder images, the control system can respond to a deficiency of heat content in the fixing device by causing one or a certain plurality of the fixed time intervals to lapse without image formation and sheet transport after each occurrence of one or a certain plurality of the time intervals with image formation and sheet transport.
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patent: 4078166 (1978-03-01), Kitamura et al.
patent: 4132882 (1979-01-01), Endo et al.
Johnston Albert C.
Oce'-Nederland, B.V.
Prescott Arthur C.
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