Book dimension detector

Details Book dimension detector Book dimension detector

1994-06-06

1995-04-25

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356383, G01N 2186

Patent

active

054101573

ABSTRACT:
The present invention detects a bad book, i.e. one having improper dimensions, by relying upon sensors for sensing the leading and trailing edges of the book and upon a circuit responsive to the sensors for detecting a bad book. A blocked sensor detector is provided for determining if one or more sensors are improperly blocked.

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patent: 5142158 (1992-08-01), Craig, Jr.
patent: 5202557 (1993-04-01), Robertson

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