Abstract: A foil-type shadow mask stretching apparatus for a flat cathode ray tube comprises a clamping device in the shape of an elipse, a circle, other similar shapes. The clamping device has a clamping lane with inclined projections arranged in a tooth-like manner; a ring-shaped push pad having a shape abuttingly compatible with to the clamping lane, and C-shaped clamping rings for tightly pressing the push pad onto the clamping lane, whereby the shadow mask is clamped between the clamping lane and the push pad. The shadow mask stretching apparatus prevents abnormal deformation and wrinkling caused by contraction of a shadow mask.

Abstract: A shadow mask heating apparatus for a color CRT of the flat faceplate type includes upper and lower heated platens, each provided with heating means therein. One of the platens includes a plurality of mask support elements having a predetermined height radially disposed in an equally spaced relation on the top surface. The mask support elements preferably consist of a plurality of long and short, in length, mask support element. A plurality of passages radially formed on the top surface result between the mask support element. A plurality of adjusting pins disposed on the peripheral area of the top surface thereof of the one platen keeps the two platens separated a precise distance. The arrangement of radially disposed mask support elements minimizes shadow mask deformation during manufacture.