Method and apparatus for determining directional variation of sh

Details Method and apparatus for determining directional variation of sh Method and apparatus for determining directional variation of sh

1995-02-17

1996-09-24

Hantis, K.

Optics: measuring and testing

By shade or color

356319, 356326, 250226, 385 12, G01J 346

Patent

active

055596053

ABSTRACT:
This invention relates to a method and apparatus for determining directional variation of shade of pile or napped materials. This directional variation of shade can be determined in multiple directions either simultaneously or sequentially utilizing spectrophotometers with bifurcated fiber optic cables. The bifurcated fiber optic cable is repeatably and accurately positioned over the pile or napped materials. A typical non-limiting example of pile materials includes carpeting.

REFERENCES:
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patent: 4029419 (1977-06-01), Schumann
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patent: 4707138 (1987-11-01), Coatney
patent: 4917500 (1990-04-01), Lugos
patent: 5151751 (1992-09-01), Nakajima et al.
patent: 5233408 (1993-08-01), Satula
Simon, "Shade Sorting by the 555 System", Mar. 1984, American Dye Stuff Reporter, pp. 17-28.

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