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:
Oct. 19, 1993
Filed:
Oct. 21, 1992
Wilhelm Bier, Eggenstein-Leopoldshafen, DE;
Thomas Schaller, Weingarten, DE;
Klaus Schubert, Karlsruhe, DE;
Kernforschungszentrum Karlsruhe GmbH, Karlsruhe, DE;
Abstract
A method of manufacturing a plastic article having micro-openings defined therein by working a semi-finished plastic structure having microrecesses defined on one side thereof, the method including, in the order recited, providing a semi-finished plastic structure having opposing first and second sides, wherein the first side of the opposing sides has microrecesses defined therein; filling the semi-finished plastic structure to cover the microrecesses with a substance which is hardenable and selectively removable; hardening the substance; machining the surface of the hardened substance to smooth it; clamping the semi-finished plastic structure onto a vacuum tensioning device with the smoothed surface of the hardened substance in contact with the vacuum tensioning device; machining the second side of the opposing sides of the semi-finished plastic structure until the microrecesses of the first side are at least partially exposed thereby defining micro-openings in the structure; and removing the hardened substance selectively from the microrecesses.