Process and apparatus for molding liners in container closures

Details Process and apparatus for molding liners in container closures Process and apparatus for molding liners in container closures

1979-09-21

1982-08-10

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Making hole or aperture in article

264230, 264250, 264266, 264268, 264291, 425110, 425112, 425127, 425291, 425809, B29D 908, B29D 716

Patent

active

043437540

ABSTRACT:
A process for making a composite closure having a plastic cap with specially configured pedestals that are interconnected to a plastic liner. In one embodiment, the pedestals are each formed with an overhang, such as a mushroom-shaped overhang, to provide a mechanical interlock with the liner. In other embodiments, the pedestals are each formed with a fusible heat concentration zone that is fused to the liner as the liner is compression molded and heated in the cap. In one embodiment, each of the fusible pedestals are formed with a cylindrical configuration. In another embodiment, each of the fusible pedestals are formed in the shape of a pyramid.

REFERENCES:
patent: 2068389 (1937-01-01), Smith
patent: 2372177 (1945-03-01), Conner
patent: 2823422 (1958-02-01), Schneider
patent: 2840858 (1958-07-01), Rainer et al.
patent: 3536224 (1970-10-01), Green
patent: 3557030 (1971-01-01), Simons
patent: 3828963 (1974-08-01), Moller
patent: 3844861 (1974-10-01), Irish, Jr.
patent: 4088730 (1978-05-01), Wilde
patent: 4130213 (1978-12-01), Wszolek
patent: 4140451 (1979-02-01), Herdzina et al.
patent: 4156490 (1979-05-01), Peraboni

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