Counting system for articles conveyed in a stream

Details Counting system for articles conveyed in a stream Counting system for articles conveyed in a stream

1978-06-29

1980-08-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

235 92V, 235 92SB, 235 98C, 250222PC, 356448, G06M 706

Patent

active

042174910

ABSTRACT:
An electro-optical device mounted over a conveyed stream of articles for sensing the passage of each article by projecting a single spot of light onto the articles and measuring the reflectance of that spot from two different angles. The measured reflectance values are fed to an electronic comparator which produces an output signal when one reflectance value exceeds the other by a predetermined amount.

REFERENCES:
patent: 2908825 (1959-10-01), Frankle et al.
patent: 3414732 (1968-12-01), Stegenga
patent: 3557380 (1971-01-01), Matthews
patent: 3737666 (1973-06-01), Dutro
patent: 3885872 (1975-05-01), Howe, Jr. et al.
patent: 4027155 (1977-05-01), Rappaport
patent: 4112309 (1978-09-01), Nakazawa et al.

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