Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1980-08-29
1983-08-16
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250223R, 356379, G01N 2186
Patent
active
043993672
ABSTRACT:
Packages include a bottom foil having spaced nests formed therein and a cover foil. At least the bottom foil is permeable to radiation so that it may be irradiated on one side with a source of radiation following a filling station during movement of the packages through a packaging machine. The intensity of the radiation allowed to pass through the bottom foil is measured by a radiation receiver having an active receiving surface which overlies the filler material and which surface is greater than the surface of the filler material facing it. The radiation through the bottom foil casts filled nests onto the receiving surface. The shadow of a nest inappropriately filled differs from a shadow of the nests appropriately filled with the filler material. An apparatus is triggered for sorting out an inappropriately filled nest by starting signals of a receiver whenever the amplitude thereof fails to reach a predetermined value. The bottom foil may otherwise be of a material capable of reflecting incident radiation so as to be irradiated with a source of rays with reflected radiation being measured by the radiation receiver.
REFERENCES:
patent: 2179000 (1939-11-01), Tea
patent: 2627347 (1953-02-01), Powers
patent: 3521749 (1970-07-01), Dijstelbergen et al.
patent: 3882316 (1975-05-01), Garris
Engelke Heinz
Grube Gerhard
Nelms David C.
Otto Haensel GmbH
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