Metal working – Barrier layer or semiconductor device making – Barrier layer device making
Patent
1976-07-06
1977-04-26
Lazarus, Richard B.
Metal working
Barrier layer or semiconductor device making
Barrier layer device making
H01J 918
Patent
active
040192318
ABSTRACT:
This disclosure depicts a method, for use in the manufacture of color television picture tubes, for attaching a frameless, curved, non-self-rigid shadow or photographic mask to a flangeless, curved faceplate, the faceplate having a concave inner surface with mask support studs extending therefrom in corner regions thereof. The method comprises providing on each corner of the mask a leaf-type spring having a stud engagement provision for retentively engaging a mating provision on one of the studs. The leaf-type spring also has indexing means separate from the stud engagement provision. The mask is supported in a substantially horizontal position, with the faceplate also being supported in a substantially horizontal position such that the concave surface of the faceplate faces a convex surface of the mask. The faceplate and the mask are rotationally and translationally aligned by engaging the studs on the faceplate with a stud aligning means such that the mating provisions on the stud lie in a substantially horizontal, predetermined stud reference plane, and by engaging the indexing means on the spring with a spring aligning means such that the stud engagement provisions lie in a substantially horizontal, predetermined spring reference plane. The spring reference plane is spaced a predetermined distance in a substantially vertical direction from the stud reference plane. The springs are depressed with the spring aligning means. Translational, relative motion is effected over the predetermined distance between the faceplate and mask assembly such that the stud reference plane and the spring reference plane coincide. The springs are released such that the stud engagement provisions on the springs engage the mating provisions on the stud.
REFERENCES:
patent: 3838483 (1974-10-01), Baranski et al.
patent: 3894260 (1975-07-01), Sediry
patent: 3978562 (1976-09-01), Polar
Garrett John R.
Lazarus Richard B.
Zenith Radio Corporation
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