Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Producing multilayer work or article
Patent
1994-07-18
1996-07-09
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Producing multilayer work or article
264230, 264313, 264342R, 156138, 474205, F16G 100, F16G 128, F16G 520
Patent
active
055342175
ABSTRACT:
A method of making tooth belts by formation thereof about the outer peripheral surface of a building drum having a generally cylindrical configuration and a surface defining a series of parallel, tooth-shaped grooves. The belts are formed by wrapping a fabric circumferentially around the building drum and winding a cord of tensile material helically about the fabric. A layer of thermoplastic material is formed about the cord of tensile material, and a cord of shrink material is wrapped helically about the layer of thermoplastic material. The shrink material has a higher softening temperature than the thermoplastic material and will shrink at a temperature below its softening temperature. Pressurized steam is applied to the shrink material at a temperature below its softening temperature and between the softening temperature and the melting temperature of the thermoplastic material. This shrinks the shrink material and extrudes a thermoplastic material through the tensile material, against the fabric and into the tooth-shaped groves of the building cylinder.
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Brady et al., Materials Handbook, 12th ed., p. 813.
Bishop Clinton L.
Thomas Danny L.
Dayco Products Inc.
Tassone Joseph V.
Timm Catherine
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