Original detection apparatus

Details Original detection apparatus Original detection apparatus

1989-03-31

1990-07-03

Moses, R. L.

Photocopying

Contact printing

Light boxes

355309, G03G 1500

Patent

active

049395530

ABSTRACT:
An original detection apparatus includes a placing table for placing an original thereon, an openable/closable pressing member for covering the original placed on the placing table, an original detection unit, arranged below the placing table, for detecting the presence/absence of the original on the placing table, an open/closed detection unit for detecting an open/closed state of the pressing member, and a judging unit for judging whether or not the original is placed on the placing table, on the basis of an output from the original detection unit obtained when the open/closed detection unit detects that the pressing member is in an open state and an output from the original detection unit obtained when the open/closed detection unit detects that the pressing member is in a closed state.

REFERENCES:
patent: 4456372 (1984-06-01), Yamaguchi
patent: 4764788 (1988-08-01), Watashi et al.
patent: 4766404 (1988-08-01), Ishida et al.

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