Crt with peripheral plastic coating and method of making same

Details Crt with peripheral plastic coating and method of making same Crt with peripheral plastic coating and method of making same

H - Electricity

01

J

313/35.5

H01J 29/88 (2006.01) H01J 9/20 (2006.01) H01J 29/87 (2006.01)

Patent

CA 1120990

ABSTRACT A CRT (cathode-ray tube) comprises an envelope including a glass faceplate panel and an adjoining glass funnel sealed to the panel, and an elastomeric coating of polyurethane around and adhered to external surfaces of the envelope. The coating may be produced by applying, drying and curing a coating of an aqueous emulsion of polyurethane on the desired external surfaces of the tube. The coating may extend from the panel as far back on the adjoining funnel as desired,and as far forward on the panel sidewalls and viewing window as desired. Also, the polyurethane band may be used in combination with a metal tension band.

314699

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