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:
Feb. 05, 1991
Filed:
Feb. 21, 1989
Guy Bessey, Auvers sur Oise, FR;
Alain Noterman, Puiseux en France, FR;
Clecim, Cergy Pontoise, FR;
Abstract
A method and apparatus for extruding metal using the reverse method in which a billet placed in the bore of a container is compressed between a base and an extruding block. Billets are extruded in the raw state without prior removal of the outer layer, leaving a play sufficient to form a sleeve of a thickness at least equal to that of the outer layer to be removed, between the periphery of the block and the inner face of the bore, along the inner face. The bore is then scraped, using a scraping block whose periphery is separated from the inner face of the bore by a play which is less than the thickness of the sleeve but sufficient for the sleeve to be removed over a part only of its thickness.