Test piece coloration comparative decision unit

Details Test piece coloration comparative decision unit Test piece coloration comparative decision unit

1991-02-08

1992-11-03

Evans, F. L.

Optics: measuring and testing

By shade or color

With reflective multicolor chart or standard

36441311, G01J 352

Patent

active

051609797

ABSTRACT:
An apparatus is provided for making color comparisons between a test sample and a plurality of color samples. The color samples are arranged on a circle on a rotatable member and are successively moved into position adjacent a test sample. When an operator determines that a color sample adjacent the test sample is closest in color to the test sample he operates a switch which causes a stored numerical value associated with that sample to be read out and displayed on a display device.

REFERENCES:
patent: 2058073 (1936-10-01), Fritzsching
patent: 4685059 (1987-08-01), Yamamoto
patent: 4871258 (1989-10-01), Herpichboehm et al.

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