Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Reshaping – drawing or stretching
Patent
1997-07-17
1999-11-16
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Reshaping, drawing or stretching
264 406, 264237, 264295, 264322, 264339, 264348, 264492, 425143, 4251744, 425384, 425392, B29C 3508, B29C 3516
Patent
active
059852038
ABSTRACT:
A method for forming a bend in a tube of thermoplastic material by heating a pre-formed bend to a pre-determined temperature and maintaining the temperature substantially constant by the pulsed emission of infra-red radiation from one or more infra-red sources in response to the surface temperature of the tube detected by a remote temperature sensor.
REFERENCES:
patent: 3990284 (1976-11-01), Barten
patent: 4711747 (1987-12-01), Halter
patent: 4772438 (1988-09-01), Watanabe et al.
patent: 5200124 (1993-04-01), Bowkett
patent: 5407613 (1995-04-01), Schulte
McKechnie Plastics Limited
Poe Michael
Silbaugh Jan H.
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