Apparatus and method for changing the color of a flow of fluid

Details Apparatus and method for changing the color of a flow of fluid Apparatus and method for changing the color of a flow of fluid

2004-03-04

2008-03-04

Evans, F. L. (Department: 2877)

Optics: measuring and testing

By shade or color

Fluid color transmission examination

C356S425000, C366S140000, C366S142000, C366S143000

Reexamination Certificate

active

07339674

ABSTRACT:
A color adjustment system for changing the color of fluid flowing from a source. The color adjustment system includes a main mixing pipe connected to storage vessels to continuously receive flows of colorants from the storage vessels. A fluid inspection cell is connected to the main mixing pipe for continuously receiving a sample portion of the flow of the fluid composition. A spectrophotometer is positioned to view the sample portion of the flow of the fluid composition through a window of the fluid inspection cell. The spectrophotometer transmits measured color values to a control unit, which generates control signals in response thereto. The control signals are transmitted to colorant pumps, which pump colorants to the main mixing pipe in response to the control signals.

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International Search Report for PCT/US2004/006581 , 3 pages PCT Written Opinion dated Oct. 13, 2004, International Application No. PCT/US2004/006581, International Filing Date Mar. 4, 2004, corresponding to U.S. Appl. No. 10/792,953.

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