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:
Nov. 03, 1987
Filed:
Jun. 06, 1986
Applicant:
Inventor:
Tjepke H Ekkelboom, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ; B21C / ;
U.S. Cl.
CPC ...
7610 / ;
Abstract
A method of manufacturing a drawing die, in which a core of, for example, natural or synthetic diamond is clamped in the cavity intended for this purpose by deforming a tube which is made of, for example, a copper alloy to an annulus, the core being properly centered through the use of a rod-like member by means of which the core is pressed against the bottom of the cavity by a rod-like member having a pressure surface parallel to the bottom of the cavity during the deformation of the cylinder; in this way tilting of the core is precluded and it is not covered with material of the annulus in places where this is undesirable.