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:
Jun. 09, 1987
Filed:
Jul. 12, 1985
Charles J Prazak, III, Elmhurst, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
A glass faceplate for use in a color cathode ray tube has a target area with a pattern of phosphor deposits circumscribed by a sealing area, and a frame supporting a shadow mask with a sealing area geometrically matching the sealing area of the faceplate. Three indexing means are spaced apart along the sealing areas for indexing the faceplate in relation to the frame, providing a gap of predetermined width, and leaving at least one corner of the faceplate unsupported. Shims means having shimming dimension equivalent to or slightly less than the predetermined gap width is located in the gap at the unsupported corner, whereby the unsupported corner is supported by the shim means such that the predetermined gap width is maintained during tube fabrication even at the unsupported corner. A method for assembling a color cathode ray tube which utilizes the shimming means according to the invention is also disclosed.