Facsimile and static presentation processing – Facsimile – Synchronization
Patent
1991-02-05
1995-07-25
Kuntz, Curtis
Facsimile and static presentation processing
Facsimile
Synchronization
358468, 358422, 395550, 34082516, 371 61, 371 165, 371 14, H04N 104
Patent
active
054367310
ABSTRACT:
An image processing apparatus is provided with a counter counted up by the clock of a main CPU and reset by the clock of a subordinate CPU. If the value of the count recorded by the counter is not within a fixed range for a predetermined period of time, the apparatus is judged to have developed an abnormality and a power supply for driving components under the control of the subordinate CPU is turned off. Thus, current supplied by the power supply to such components as a recording motor, thermal head, reading motor, fluorescent lamp, stamping plunger and cutter motor is cut off. Thereafter, even if the apparatus returns to normalcy, the driving power supply for the components under the control of the subordinate CPU will not turn on until the main CPU issues a trigger signal. As a result, the main CPU and subordinate CPU are monitored simultaneously, and if either CPU goes out of control, this can be sensed promptly, the driving power of the components under the control of the subordinate CPU is turned off, and accidents such as emission of smoke and burning can be prevented before they occur. Thus, the facsimile apparatus is extremely safe.
REFERENCES:
patent: 4839698 (1989-06-01), Inuzuka et al.
patent: 4926310 (1990-05-01), Inuzuka et al.
patent: 4942478 (1990-07-01), Yamagishi et al.
patent: 5068853 (1991-11-01), Soma et al.
Canon Kabushiki Kaisha
Kuntz Curtis
Lee Ping W.
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