Wickeder Westfalenstahl Gmbh

Wickeder Westgalenstahl Gmbh

Klaus-Peter Helmetag

Roland Thoms

A shadow mask of two different metals which are cold rolled into adhesion with the shadow mask made from a first metal having a coefficient of thermal expansion on the order of glass and a second metal having a coefficient of thermal expansion substantially greater than glass with the first metal forming a framework for holding the second metal in position even though the temperature of the first and second metals is elevated.

Composite shadow mask

A composite shadow mask for a cathode ray tube or the like having a first shadow mask and a second support shadow mask shiftably positioned with respect to each other, with the first shadow mask made of a first material of a first thickness with the first shadow mask having a first set of openings therein, and a second shadow mask made of a second material of a second thickness, with the second shadow mask having a second set of openings so that when the first shadow mask is placed in surface-to-surface contact with the second shadow mask, the first set of openings and the second set of openings are in register with one another to thereby permit passage of an electron beam to be defined by openings in the first shadow mask even though the masks can shift with respect to each other during use.

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Munich, Georgia

Klaus-Peter Helmetag