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:
Mar. 17, 1981
Filed:
May. 30, 1979
Teijin Engineering Ltd., Tokyo, JP;
Abstract
An apparatus for regenerating a spent photograhic bleach-fixer solution, comprising (a) an electrodialysis cell including a cathode, an anode and alternating anion exchange membranes and cation exchange membranes arranged therebetween to define a cathode compartment, a plurality of alternating intermediate enionation and deionation compartments and an anode compartment, (b) an electrolysis cell connected to the enionation compartments of the electrodialysis cell so that an aqueous solution capable of dissolving silver salts can be circulated between the electrolysis cell and the enionation compartments, (c) a circulating tank for the spent bleach-fixer solution connected to the deionation compartments and the anode compartment of the electrodialysis cell for circulating the spent bleach-fixer solution between the circulating tank and both the deionation compartments and the anode compartment, and (d) a circulating tank for an electrolyte solution connected to the cathode compartment of the electrodialysis cell for circulating the electrolyte solution between the circulating tank and the cathode compartment; and a method for regenerating a spent photographic bleach-fixer solution using aforesaid apparatus.