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:
Dec. 13, 1988
Filed:
Dec. 11, 1987
Sae D Lee, Buffalo Grove, IL (US);
Kazimir Palac, Carpentersville, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
Components-in process and assemblies-in-process are disclosed for use in the manufacture of a high-resolution color cathode ray tube having a tensed foil shadow mask. A first component-in-process comprises a faceplate with a target area for receiving at least one pattern of phosphor deposits. The faceplate has attached at preselected, widely spaced locations on the sides thereof a plurality of discrete, detachable first indexing elements. A second component-in-process comprises a shadow mask support assembly having a frame ultimately constituting a part of the tube envelope; the frame supports the shadow mask in precise adjacency to the target area. The frame has attached on the sides thereof a like plurality of discrete, detachable second indexing elements which are in facing adjacency to the first indexing elements on the faceplate when the faceplate and frame are mated. Temporary attachment of the indexing elements is by means of a thermally degradable cement. The faceplate and frame can be inter-registered in precise relationship by the temporary use of the first and second indexing elements in the process of screening the pattern of phosphor deposits on the target area and later in the final assembly of the tube. Also disclosed is a method of manufacture of a high-resolution cathode ray tube by the detachable indexing elements according to the invention.