Plastifying and molding articles from polymer strip

Details Plastifying and molding articles from polymer strip Plastifying and molding articles from polymer strip

1978-08-10

1981-03-31

Hoag, W. E.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264138, 264163, 264271, 264279, 264296, 264299, 264310, 425814, B29D 300, B29D 3100, B29F 500

Patent

active

042592720

ABSTRACT:
Successive portions of a continuous polymer filament are plasticized such as by localized heating with ultrasonic or thermal energy, and the plasticized (plastified) portions are molded in one or more cavities to form articles such as slide fastener elements. Additionally there is disclosed the attachment of a thermoplastic slide fastener coupling element to the edge of a tape by surrounding the leg portions with walls of cavities in a pair of ultrasonic members and applying ultrasonic energy through energy directing projections located centrally within the cavities to the pair of legs to fuse the legs to the edge of the tape.

REFERENCES:
patent: 2197968 (1940-04-01), De Mattia
patent: 2207600 (1940-07-01), Seaver
patent: 2584712 (1952-02-01), Jones
patent: 2807970 (1957-10-01), Dorman
patent: 3097395 (1963-07-01), Yoshida
patent: 3340594 (1967-09-01), Frohlich et al.
patent: 3510379 (1970-05-01), Heimberger
patent: 3672008 (1972-06-01), Moertel et al.
patent: 3735469 (1973-05-01), Moertel et al.
patent: 3775815 (1973-12-01), Johnston et al.
patent: 3804577 (1974-04-01), Gauss
patent: 4026974 (1977-05-01), Moertel et al.
patent: 4115489 (1978-09-01), MacFee

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