Color region analyzer for detecting and separating polyvinyl chl

Details Color region analyzer for detecting and separating polyvinyl chl Color region analyzer for detecting and separating polyvinyl chl

1993-11-22

1995-09-05

Evans, F. L.

Radiant energy

Luminophor irradiation

With ultraviolet source

209577, 209578, G01N 2164

Patent

active

054480744

ABSTRACT:
An apparatus used for quality control in the plastics recycling industry for quality control of recycled post consumer clear plastics beverage containers by their ultraviolet black light reflected color, and sends information to a personal computer connected by analog to digital port that compiles a report by software in the P.V.C. contaminants content of a grain sized probe sample of ground P.E.T. material. The apparatus has a photomultiplier tube fitted with a filter capable of blocking the nanometer light wavelength region reflected ultraviolet black light color of P.E.T., allowing the reflected color of P.V.C. to pass through the filter to allow detection and removal of the P.V.C.. The apparatus is able to detect and remove material that is not within a predetermined nanometer region of reflected ultraviolet black light stimulated color, and by computer software generate a report by analyzing analog to digital logic circuit data on the color region content value of the test sample, The apparatus is useful in determining the amount of contaminants in random samples of clear plastic ground containers.

REFERENCES:
patent: 4278538 (1981-07-01), Lawrence et al.
patent: 5120768 (1992-06-01), Sisson
patent: 5141110 (1992-08-01), Trischan et al.
patent: 5252614 (1993-10-01), Sisson

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