Color cathode ray tube with a tension mask support having an...

Details Color cathode ray tube with a tension mask support having an... Color cathode ray tube with a tension mask support having an...

H - Electricity

01

J

313/35.165

H01J 29/07 (2006.01) H01J 9/227 (2006.01) H01J 29/88 (2006.01)

Patent

CA 1274271

ABSTRACT OF THE DISCLOSURE A front assembly for a color cathode tube is disclosed. The tube faceplate has on its inner surface a centrally disposed screen area for receiving process materials during the spin-application process. The front assembly has a shadow mask support structure secured to the inner surface of the faceplate on opposed sides of the screen area. The structure has a first surface for receiving and securing a foil shadow mask, and a second surface inclined from the first surface to the screen area effective to conduct from the screen area any excess of coating material applied during the spin- application process. As a result, discontinuities in phosphor application visible to the viewer, and non-adherence of phosphor resulting in wash-off and flake-off, are avoided. An embodiment is also shown in which electrical connection is made between a mask support structure and a screen.

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