Reference and support system for flat crt tension mask

Details Reference and support system for flat crt tension mask Reference and support system for flat crt tension mask

H - Electricity

01

J

316/12, 313/35.1

H01J 29/07 (2006.01) H01J 9/18 (2006.01) H01J 29/82 (2006.01)

Patent

CA 1304772

Abstract of the Disclosure A reference and support system for a flat CRT tension shadow mask is disclosed which includes a support frame which is frit sealed or shrink fitted onto a peripheral surface surrounding a target area of a flat panel. An upper edge of the support frame is finished so as to provide the desired Q-spacing between the target area and the top of the support frame. Alignment holes are drilled in the sidewalls of the support frame at a given distance from the upper edge to form a reference plane relative thereto. A temporary fixture has a tensioned mask initially secured thereto and is provided with a plurality of pins extending through sidewalls thereof at a given distance from an upper reference surface such that the pins engage the holes in the support frame and precisely position the shadow mask in the plane of the top edge of the support surface. Such fixture may be utilized for not only applying the various phosphors to the target area, but also for finally positioning the tension shadow mask on the support frame so that it may be welded thereto and the temporary frame removed.

585311

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