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:
Jul. 12, 1988
Filed:
Jun. 15, 1987
Claude Van Voren, St. Jean de Maurienne, FR;
Christian Jonville, St. Jean de Maurienne, FR;
Aluminum Pechiney, Paris, FR;
Abstract
The invention relates to a method for the individual marking of precooked anodes used in the production of aluminum by electrolysis in the Hall-Heroult process, and to the anodes produced thereby. These anodes are produced by hot compaction of a carbonaceous paste, and according to the invention, during or immediately after such compaction, a plurality of impressions is formed in the upper part of each anode. The impressions are depressions and/or relief portions, constitute a digital coding for the identification number of each anode, and remain legible until withdrawal of the components of the butt of the worn anode from the electrolysis tank. The marking can be carried out using a binary or ternary code, where the reference plane of the zone of the anode which carries the marking corresponds to a first digit, with other digits corresponding to depressions of a particular depth, depressions of a greater depth, or relief portions.