Kinescope-yoke assembly

Details Kinescope-yoke assembly Kinescope-yoke assembly

1985-02-26

1986-10-28

Lieberman, Allan M.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

524786, 524871, 358248, H01J 2970

Patent

active

046201270

ABSTRACT:
An improved adhesive is disclosed for the automated assembly and alignment of kinescopes and yokes. The adhesive consists of a polymer matrix and a filler. The polymer matrix comprises an isocyanate component, a polyol component comprising one or more polyols having an average functionality greater than 2.0 and an average hydroxyl equivalent of from about 2000 to about 2500, a chain extender, a suitable catalyst and, optionally, other ingredients such as an antioxidant. The inorganic or organic filler comprises from about 32 to about 60 percent by volume of the adhesive. The subject adhesive is blended into a slow-curing and a fast-curing formulation, which are applied to a portion of the gap between the kinescope and the yoke. The fast-curing adhesive allows the completed assembly to be rapidly withdrawn from the assembly apparatus, or robot, and maintains the alignment during curing of the slower-curing adhesive. When both compositions are fully cured, there is produced an excellent, durable bond.

REFERENCES:
patent: 4000103 (1976-12-01), Olstowski
patent: 4123412 (1978-10-01), Fukuda et al.
patent: 4194618 (1980-03-01), Malloy
patent: 4370445 (1983-01-01), Depetris et al.
patent: 4383070 (1983-05-01), Markusch et al.
patent: 4444975 (1984-04-01), Pokorny
patent: 4490645 (1984-12-01), Hamersma

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