The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 02, 1984
Filed:
Aug. 05, 1982
Jack Thomsen, Sylmar, CA (US);
Other;
Abstract
An improved method and system for properly supplying and mixing printing chemicals and liquid diluent and for supplying the resulting liquid is provided. The method and system feature the use of periodic or continuous monitoring of the ph and/or electrical conductivity level of the printing liquid in a mixing zone to regulate the flow of initial and make-up chemicals to the zone, so that the proper concentration of chemicals is maintained in the liquid. The liquid is at least periodically removed from the mixing zone and make-up diluent is at least periodically added to the mixing zone. The method can be successfully run on a batch, semi-continuous or continuous basis and the system employs an automatic electronic ph and/or electrical conductivity analyzer and signal generator to automatically control signal responsive pumps in the conduit line(s) from the chemical supply zone(s) to the mixing zone. Preferably, automatic liquid level regulating means are provided in the mixing zone, along with an annular drip tube, circulating pump, exit and return lines and the like. The system and method are simple, economical, durable and highly efficient for making up proper levels of printing liquids for offset printing and the like.