Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having structure to restrict rotation of threaded – mating... – Including settable material
Patent
1986-03-17
1987-04-14
Holko, Thomas J.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having structure to restrict rotation of threaded, mating...
Including settable material
411369, 411542, 411914, 411915, F16B 3900
Patent
active
046574603
ABSTRACT:
The present invention relates to improvements in a self-bonding fastener and to a novel method of curing the bonding material during assembly line fabrication of sheet metal products. The fastener includes a headed self-threading screw member having its head undersurface formed with an annular axially extending lip. An upper portion of the screw thread is precoated with a thermo-setting adhesive which, when heated, will uniformly bond the fastener to a sheet metal plate. As the fastener is threaded through an undersized hole in a sheet metal member, such as an automobile body, the adhesive reliquifies and is stripped from the screw thread. The adhesive is then re-deposited uniformly to completely fill a closed chamber defined between the head undersurface and the opposed sheet metal surface sealed on its periphery by the annular lip which defines the axial dimension of the adhesive thickness. As a final step, the adhesive may be cured as an adjunct to the assembly line travel of the vehicle body through a final paint-drying oven cycle.
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Barthel Edward P.
Chrysler Motors Corporation
Holko Thomas J.
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