Wet processing ph control

Details Wet processing ph control Wet processing ph control

G - Physics

05

D

341/35

G05D 11/13 (2006.01) G03D 3/06 (2006.01) G05D 21/02 (2006.01)

Patent

CA 1087711

WET PROCESSING PH CONTROL Abstract of the Disclosure Disclosed is a wet processing station in which control of the PH of the processor liquid is mandatory within predetermined limits, the processor including a tank having means to subject product to a bath of processing liquid. A PH monitoring probe is positioned in the tank with a pump in the tank for mixing processing liquid therein. The pump has a liquid intake and a discharge, the intake being positioned closely adjacent to the probe so that liquid being mixed in the tank will flow across the probe into the intake of the pump. A processing liquid concentrate holder is coupled to liquid concentrate carrying means which connect the holder to the probe, the liquid carrying means having an outlet which is positioned to discharge concentrated processing liquid directly onto the probe. Probe moni- toring means which is responsive to the output of the PH monitoring probe provides a signal output when the PH of the processing liquid reaches at least a prede- termined lower limit. A process liquid concentrate control means coupled to the liquid concentrate holder is responsive to the signal output of the probe monitoring means to apply a concentrated measure or dose of process liquid to the probe. A timer is coupled to the first signal output of the probe monitoring means to interrupt the signal output for a predetermined period of time upon the concentrated dose of process liquid being applied to the probe to thereby insure mixing of the solution within the tank prior to the probe monitoring means being effective to add another measure of con- centrated process liquid to the tank. The purpose of this abstract is to enable the public and the Patent Office to determine rapidly the subject matter of the technical disclosure of the Application. This abstract is neither intended to define the invention of the Application nor is it intended to be limiting as to the scope thereof.

285780

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