Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Patent
1997-02-03
1998-10-13
Le, Que
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
250216, 355121, G01N 2186
Patent
active
058215514
ABSTRACT:
A paper sensor apparatus of a laser beam printer includes a LED located on the center of a substrate, obliquely positioned two-facet mirror for reflecting the light from the LED to both sides of the LED, photodiodes for receiving the light, and a paper presence detecting shutter and a paper feeding shutter located between the photodiodes and the obliquely positioned two-facet mirror, respectively for blocking or transmitting the light. Low production cost and an enhancement of productivity can be achieved because the structure of the paper presence detecting sensor and paper feeding sensor can be made cheaply and automatic assembly is possible.
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Bushnell Esq. Robert E.
Le Que
Samsung Electronics Co,. Ltd.
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