Forming plastic articles having strands by stretching

Details Forming plastic articles having strands by stretching Forming plastic articles having strands by stretching

1980-10-03

1983-07-19

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Stretching or stretch forming

264DIG81, 425383, 425DIG48, 425DIG53, B29C 1703

Patent

active

043943420

ABSTRACT:
In order to make a non-planar plastics material article, a starting material has at least one ring of holes or depressions and is pressed so that the part which is within the ring is moved generally at right angles to the plane of the ring with respect to the part which is outside the ring, thereby stretching, into orientated strands, zones between adjacent holes or depressions in the ring; in the finished article, the strands interconnect the two parts.

REFERENCES:
patent: 3140330 (1964-07-01), Gutierrez
patent: 3256564 (1966-06-01), Welshon
patent: 3261903 (1966-07-01), Carr
patent: 3365352 (1968-01-01), Van Burleigh et al.
patent: 3386876 (1968-06-01), Wyckoff
patent: 3608032 (1971-09-01), Boultinghouse
patent: 3642967 (1972-02-01), Doll
patent: 3682760 (1972-08-01), Fairbanks
patent: 3756300 (1973-09-01), Nalle, Jr.
patent: 4197075 (1980-04-01), Suzuki
patent: 4276255 (1981-06-01), Russell

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