Shadow mask stretching apparatus for flat cathode ray tube

摘要

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.