Method for automated identification of recycled plastic articles

Details Method for automated identification of recycled plastic articles Method for automated identification of recycled plastic articles

1993-10-01

1994-11-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356239, G01N 2186

Patent

active

053650751

ABSTRACT:
A method for differentiating polymers contained in plastic articles by passing the articles between a light source and an array of detectors which are positioned in a manner such as to allow simultaneous measurements of a directly transmitted light signal and a diffused light signal. The transmitted light signal and diffused light signal are compared and used as a basis for differentiating the polymers.

REFERENCES:
patent: 5134291 (1992-07-01), Ruhl, Jr. et al.
patent: 5141110 (1992-08-01), Trischan et al.
patent: 5150307 (1992-09-01), McCourt et al.
patent: 5260576 (1993-11-01), Sommer, Jr. et al.

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