Test piece coloration comparative decision unit

Optics: measuring and testing – By shade or color – With reflective multicolor chart or standard

Patent

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Details

36441311, G01J 352

Patent

active

051609800

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: 4058073 (1936-10-01), Fritzsching
patent: 4685059 (1987-08-01), Yamamoto
patent: 4871258 (1989-10-01), Herpichboehm et al.

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