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. 10, 1979
Filed:
Apr. 03, 1978
Hubertus J Ronde, Eindhoven, NL;
Peter C Van Loosdregt, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A method of manufacturing a focusing shadow mask for a color cathode ray tube is disclosed in which two conductive plates, forming the electrode structure, are secured together by insulating material so that they do not contact each other. Prior to assembly, at least one of the plates is provided with a pattern of substantially parallel ridges joined together by strips much thinner than the ridges. The material of the thin strips is removed after the plates are secured together, so that the remaining ridge portions form a set of conductors with the spaces therebetween being aligned with apertures on the other plate to form a plurality of openings for passage of electron beams.