Thermal realtime clock

Details Thermal realtime clock Thermal realtime clock

1993-01-11

1994-05-31

Smith, Matthew S.

Photocopying

Contact printing

Light boxes

355204, 355205, 355206, 355208, 355285, G03G 2100

Patent

active

053173678

ABSTRACT:
A reprographic machine having a plurality of operating subsystems employs a setup procedure that prevents use for copying until all subsystems reach operating conditions. To avoid the need for time lost in the setup procedure where a power shut down is short, a bypass system, which senses the duration of the shut down, is utilized to allow prompt return to the copy function. Heated elements, such as fuser rolls, motors, and the like can be utilized to provide a timing function, based on temperature decay characteristics relative to time. The sensed temperature can be used as a control parameter for allowing bypass of the setup procedures.

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patent: 5087941 (1992-02-01), Smith
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