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:
Aug. 07, 1990
Filed:
Dec. 20, 1988
Applicant:
Inventor:
Olivier Puyplat, Paris, FR;
Assignee:
Banque de France, Puteaux, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23H / ; B23H / ;
U.S. Cl.
CPC ...
219 6917 ; 219 692 ; 204-6 ; 2041895 ;
Abstract
The invention relates to duplicating intaglio print elements in steel by using an engraved copper art model as a template for a copper electrode which in turn is utilized in an electro-erosion machining process to produce the steel workpieces. The invention is particularly applicable to making intaglio print elements for printing on bank note paper and more particularly for printing paper money.