Original document size detecting arrangement

Details Original document size detecting arrangement Original document size detecting arrangement

1984-01-16

1986-09-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

355 75, G01N 2186

Patent

active

046148744

ABSTRACT:
An arrangement for detecting sizes of original documents for use in a copying apparatus or the like, which is capable of effecting size detection at high reliability irrespective of thicknesses of original documents, and in which an adverse effect due to cross-talk light by neighboring light emitting elements employed in it is eliminated for detection of various sizes based on presence of correct original documents.

REFERENCES:
patent: 3689143 (1972-09-01), Case et al.
patent: 3891857 (1975-06-01), Wiklund
patent: 4302098 (1981-11-01), Kan et al.
patent: 4338020 (1982-07-01), Yukawa
patent: 4417824 (1983-11-01), Paterson et al.

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