Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length
Patent
1981-01-07
1982-06-15
Bell, James J.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Production of continuous or running length
264103, 2642888, 2642896, 264230, 264342RE, 428192, B29D 0000, B29D 714
Patent
active
043350704
ABSTRACT:
A reticular web of thermoplastic resin composed of split or slit fibers is longitudinally fed around a system of nip rollers as it is transversely spread along its selvages which then longitudinally shorten into contact with small-diameter end portions of one of the nip rollers. At least one dimensionally stable thread is attached to and along each of the web selvages to reinforce the latter. The web thus laterally spread is caused to heat-shrink at its middle portion on a heated drum until the middle portion is of substantially the same length as that of the selvages. Each of the selvages including the thread has a basis weight which is substantially the same as or smaller than that of the middle portion. The selvages of the reticular web thus treated are rendered dimensionally stable for guidance of the web in a manner to keep the latter constant widthwise while the web is wound around or reeled out from a take-up roll.
REFERENCES:
patent: 4116892 (1978-09-01), Schwarz
patent: 4251585 (1981-02-01), Schwarz
Kurihara Kazuhiko
Tani Haruhisa
Yazawa Hiroshi
Yazawa Masahide
Adams Bruce L.
Bell James J.
Burns Robert E.
Lobato Emmanuel J.
Nippon Petrochemicals Co. Ltd.
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