Process and apparatus for the manufacture of cathode ray...

Details Process and apparatus for the manufacture of cathode ray... Process and apparatus for the manufacture of cathode ray...

H - Electricity

01

J

316/12

H01J 9/00 (2006.01) H01J 9/227 (2006.01) H01J 29/07 (2006.01)

Patent

CA 1316977

ABSTRACT This invention relates to a reusable factory fixture frame and process for using same in the manufacture of a color cathode ray tube having a flat faceplate and a tensed foil shadow mask. The frame provides for mounting an in-process shadow mask during photoexposure of an in-process faceplate in a lighthouse. The frame comprises generally rectangular frame means and quick-release mechanical mask-retaining means for temporarily and removably supporting an in-process shadow mask in tension. The frame includes a generally rectangular frame structure having grooves thereabout for receiving an edge of the shadow mask. The mask retaining means may comprise spring-loaded mechanical mask-retaining devices which are secured to the side of the factory fixture frame for temporarily and removably supporting the in-process shadow mask in tension in the grooves. The shadow mask is heated and allowed to expand prior to being temporarily and removably supported on the frame, and the shadow mask is allowed to cool and shrink in tension while so being supported to effect tensing of the shadow mask in clamped condition on the frame.

567109

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