Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Differential temperature conditioning
Patent
1980-11-03
1983-02-01
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Differential temperature conditioning
29463, 264545, 264554, 264295, 264296, B29C 1704
Patent
active
043714943
ABSTRACT:
A thermoplastic cylindrical clamp is manufactured by heating a flat sheet of thermoplastic material, thermoforming the softened sheet over a mold having two parallel and semicylindrical shapes with a narrow planar space between them and a coplanar flange surrounding, trimming the thermoformed sheet so the semicylinders are open at each end, locally heating the narrow planar portion between the semicylinders to the softening point, bending the softened portion so the semicylinders form a complete cylinder and cooling the part in the cylindrical shape.
REFERENCES:
patent: 3489265 (1970-01-01), Puente
patent: 3767752 (1973-10-01), Karlyn et al.
patent: 3960181 (1976-06-01), Baur et al.
patent: 4002417 (1977-01-01), Vecchiotti et al.
Gravity Guidance, Incorporated
Silbaugh Jan H.
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