Method of molding a plastic lid with barrier layer

Details Method of molding a plastic lid with barrier layer Method of molding a plastic lid with barrier layer

1990-01-29

1991-08-06

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

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

Punching article from sheet material

264247, 264259, 264268, 425809, B29C 4516

Patent

active

050375954

ABSTRACT:
A method of making lids involves providing multiple mold parts which are movable between open and partially telescoped closed conditions, provision of a barrier strip or laminate which includes foamed plastic material, closing the mold parts to define a lid-shaped cavity with one of its inner and outer surfaces defined by a registered portion of the strip and spraying preheated plastic which adheres to the strip to fill the cavity and form the lid. The registered portion may be cut out during closing of the mold parts.

REFERENCES:
patent: 3511902 (1970-05-01), Santangelo
patent: 3896959 (1975-07-01), Roy
patent: 4076790 (1978-02-01), Lind
patent: 4421705 (1983-12-01), Hatakeyama
patent: 4459092 (1984-07-01), Hatakeyama
patent: 4545752 (1985-10-01), Hanamoto et al.
patent: 4588465 (1986-05-01), Paciorek
patent: 4728477 (1988-03-01), Dromigny

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