Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-01-29
1991-04-16
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
209588, G01N 904
Patent
active
050085336
ABSTRACT:
An apparatus and method for automatically inspecting containers at an increased rate is characterized by simultaneous inspection of adjacent containers by a plurality of photosensors. Containers are moved in series order along a prescribed path through an inspection area. Exterior surfaces of containers are illuminated; openings in the container bodies permit light to be transmitted to a photosensor through a viewing window in an opaque disk which shields unwanted light from the sensor. Photosensors are arranged to receive light in parallel overlapping paths. Optical units including lens and optic fiber bundles direct light from successively tested containers to different sensing paths. In an alternative embodiment, the disk has a split window configuration permitting successively tested containers to be detected by alternate sensors.
REFERENCES:
patent: 3411009 (1968-11-01), Ford et al.
patent: 3963918 (1976-06-01), Jensen et al.
patent: 4241256 (1980-12-01), Tagaya et al.
patent: 4276467 (1981-06-01), Dubberly et al.
patent: 4335960 (1982-06-01), Ashcroft et al.
McDonald Alan T.
Nelms David C.
Reynolds Metals Company
Shami K.
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