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:
Jan. 03, 1995
Filed:
Feb. 09, 1994
Werner Van de Wynckel, Mortsel, BE;
Dirk de Ruijter, Deurne, BE;
Benny Jansen, Geel, BE;
Frank Michiels, Arendonk, BE;
AGVA-Gevaert N. V., Mortsel, BE;
Abstract
Silver is recovered from solutions containing the same, e.g. photographic processing solutions, in an electrolytic cell including an anode, a removable cathode and electrical connectors therefore on the exterior of the cell. The removable cathode is circular in configuration and encircles the anode. On the interior of the cell, electrical contact is made around the upper end of the cathode by means of an annular contact surface providing a large area of contact and minimizing the risk of occurrence of a corrosive connection. The upper end of the cathode is shaped for deformation, preferably in the form of castellations, and is clampingly pressed against the contact surface by a frusto-conical extension of the lid of the cell. The lid fits in threadwise engagement within the opening to the cell through which the cathode can be removed. As the lid is threaded into the cell opening, the frusto-conical extension thereof bears against the deformable cathode end portion and clamps the same against the contact surface. In this arrangement, the contact surface is situated above the level of the electrolyte in the cell so as to be protected against corrosion by the electrolyte.