Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Stretching or stretch forming
Patent
1978-03-06
1979-07-03
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Stretching or stretch forming
264316, 264322, 264339, 425393, 425403, 425DIG30, B29C 1702
Patent
active
041600061
ABSTRACT:
Crinkle-free tube bends can be produced by introducing a flexible core into the straight tube length to be bent, bending the tube length around movable templates at the optimum thermoforming temperature and, while bending, laying an extensible insert between the tube length and the bending template.
REFERENCES:
patent: 1602579 (1926-10-01), Ives
patent: 1877628 (1932-09-01), Replogle
patent: 1880053 (1932-09-01), Schur
patent: 2431851 (1947-12-01), Worden
patent: 2434379 (1948-01-01), Wiesner
patent: 2932065 (1960-04-01), Jenkins
patent: 3753635 (1973-08-01), Barnett
patent: 3992505 (1976-11-01), Tally
patent: 4080141 (1978-03-01), Usui
Kruger Josef
Patzner Alfred
Hoechst Aktiengesellschaft
Pavelko Thomas P.
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