Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Internally threaded fastener element – e.g. – nut – etc.
Patent
1988-05-18
1989-08-15
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Internally threaded fastener element, e.g., nut, etc.
411378, 411903, 134 1, 134 4, 134 38, 427156, 427287, 4273885, F16B 3700
Patent
active
048569542
ABSTRACT:
A method of masking the threaded portion of a threaded fastener part to prevent adhesion of coatings comprising the steps of applying a film of a heat activated foaming polymeric material to the threaded portion of a threaded part prior to exposing the threads to a coating and heating the foaming material subsequent to the application of a coating thereto. The foaming material comprises a plastisol, preferably including a vinyl compound, which most preferably is polyvinyl chloride. The foaming material further comprises a blowing agent, preferably azodicarbonamide.
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patent: 4210567 (1980-07-01), Kosters
patent: 4268544 (1981-05-01), Wallace
patent: 4278713 (1981-07-01), Burba et al.
patent: 4548967 (1985-10-01), Brown et al.
patent: 4701348 (1987-10-01), Neville
patent: 4748049 (1988-05-01), Charles et al.
Buell Industries, Inc.
Ringel Douglas E.
Smith Gary L.
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