Means and method for manufacture of a high-resolution color cath

Details Means and method for manufacture of a high-resolution color cath Means and method for manufacture of a high-resolution color cath

1985-07-23

1987-12-15

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

430 23, 445 52, H01J 9227, H01J 940

Patent

active

047130342

ABSTRACT:
In-process articles of manufacture are disclosed for the manufacture of a high-resolution color cathode ray tube having a tensed foil shadow mask. A first article-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. An article-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.

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patent: 4495437 (1985-01-01), Kume et al.
patent: 4547696 (1985-10-01), Strauss

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