Apparatus for controlling the absorption of one or more color co

Details Apparatus for controlling the absorption of one or more color co Apparatus for controlling the absorption of one or more color co

1980-04-24

1983-02-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356411, 250565, G01J 334

Patent

active

043743226

ABSTRACT:
The temperature of the dye bath in a vat or trough (1) is controlled in dependence on absorption change, which is photometrically sensed. A command value of dye acceptance speed related to temperature of the dye within the vat is provided, compared with actual temperature, and a control signal is derived which, in turn, controls a heat exchanger supplied, selectively, with a heating or cooling medium in order to control dye acceptance of at least one predetermined dye component of the bath by the material therein.

REFERENCES:
patent: 3664744 (1972-05-01), Liston
patent: 3867040 (1975-02-01), Loffler et al.
patent: 3890510 (1975-06-01), Sturm
patent: 3953739 (1976-04-01), Colombo et al.
patent: 4015134 (1977-03-01), Sturm
patent: 4089644 (1978-05-01), Carbonell et al.
patent: 4180722 (1979-12-01), Clewans

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