Radiant energy – Invisible radiant energy responsive electric signalling – With means to inspect passive solid objects
Patent
1990-10-29
1993-11-09
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
With means to inspect passive solid objects
250349, 2503581, 250341, 209522, 209524, 209577, 209589, 356432, 378 54, G01N 2100, B07C 5342
Patent
active
052605760
ABSTRACT:
A method and apparatus for distinguishing and separating material items having different levels of absorption of penetrating electromagnetic radiation by utilizing a source of radiation for irradiating an irradiation zone extending transversely of a feed path over which the material items are fed or passed. The irradiation zone includes a plurality of transversely spaced radiation detectors for receiving the radiation beams from the radiation source. The material items passing through the irradiation zone between the radiation source and the detectors measures one or more of the transmitted beams in each item passing through the irradiation zone to produce processing signals which are analyzed by signal analyzers to produce actuated signals for actuating a separator device in order to discharge the irradiated items toward different locations depending upon the level of radiation absorption in each of the items. One example of material items which have been successfully separated are recyclable plastic containers, such as polyester containers and polyvinyl chloride (PVC) containers.
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Patent Abstracts of Japan, vol. 13, No. 590 (P-984), Dec. 26, 1989; & JP-A-1 253 017 (NEC), Sep. 10, 1989.
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Peatman James R.
Sommer, Jr. Edward J.
Dunn Drew A.
Fields Carolyn E.
National Recovery Technologies Inc.
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