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US 4,796,042 AGranted
Printing plate processor having recirculating water wash reclamation
AssigneeHoechst Celanese Corporation
InventorsCarlton D. Mappin, Thomas N. Gillich
Life of this patent
Estimating the term…
Abstract
A wash water reclamation system for a printing plate processor having an external reservoir, wash water pumping and collecting means and means for continuously measuring wash water pH and conductivity. Conductivity and pH are automatically adjusted at pre-determined levels.
Claims18
A printing paate processor recirculating wash water reclamation system which comprises:
- a. a plate processor having an enclosed housing capable of containing wash water therein, said processor having a plate inlet and a plate outlet and means for applying wash water to a plate between said inlet and said outlet;
- and
- b. a wash water reservoir external to said housing;
- and
- c. means for pumping wash water from the reservoir to the wash water applying means of the processor;
- and
- d. means for collecting wash water from the wash water applying means of the processor and returning it to the reservoir;
- and
- e. means for continuously and automatically measuring the pH of the wash water in the reservoir;
- and
- f. injection means responsive to said pH measuring means capable of automatically adding a pH adjusting composition to the wash water in the reservoir at a predetermined pH.
8 more elements
A method of extending the useful lifetime of wash water used in a printing plate processing apparatus which method comprises:
- a. providing a wash water reservoir external to said processor and pumping wash water from the reservoir to the processor, and collecting used wash water from the processor and returning it to said reservoir;
- and
- b. automatically and continuously measuring the pH of the wash water in the reservoir;
- and
- c. automatically injecting a pH adjusting composition into the wash water in the reservoir and maintaining the pH of the wash water in a predetermined range.
2 more elements
Dependencies are inferred from the claim text.