Method for controlling the characteristics of an aqueous solutio

Details Method for controlling the characteristics of an aqueous solutio Method for controlling the characteristics of an aqueous solutio

1989-08-01

1991-09-17

Smith, Jerry

Boots, shoes, and leggings

364472, 164414, G05B 1302

Patent

active

050500635

ABSTRACT:
A method of controlling the characteristics of an aqueous solution for treating the surfaces of a web moving continuously in a lengthwise direction, consists of changing certain characteristics, such as the specific gravity, of the aqueous solution at a fundamental period depending on physical parameters, such as the speed at which the web is driven and/or the width of the web, by feedforward control, and changing that fundamental period in accordance with the difference between the measured characteristics of the aqueous solution and reference characteristics according to which the aqueous solution is to be controlled, by feedback control.

REFERENCES:
patent: 3596071 (1965-03-01), Doering
patent: 3767900 (1973-10-01), Chao et al.
patent: 3947668 (1976-03-01), Al-Shaikh et al.
patent: 3989935 (1976-11-01), Fay
patent: 4374703 (1983-02-01), Lebeau et al.

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