Light exposure lamp having abnormal condition monitor

Details Light exposure lamp having abnormal condition monitor Light exposure lamp having abnormal condition monitor

1986-02-27

1988-04-12

Grimley, A. T.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 68, G03G 1504

Patent

active

047378190

ABSTRACT:
An abnormal condition detection device for an automatically controlled light scanning device includes a light exposure lamp for emitting light toward an original mounted on an original table, a reflection plate for reflecting light from at least a portion of the original table, a sensor for receiving light reflected from the reflection plate, a plurality of comparators for detecting the amount of light received by the sensor, and a detection circuit for determining whether or not the amount of light detected by the comparators is within a predetermined normal range.

REFERENCES:
patent: 2956487 (1960-10-01), Giaimo, Jr.
patent: 3995959 (1976-12-01), Shaber
patent: 4124294 (1978-11-01), Nakamura
patent: 4215930 (1980-08-01), Miyakawa et al.
patent: 4239374 (1980-12-01), Tatsumi et al.
patent: 4640603 (1987-02-01), Honma

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