Foam bead bottom plastic cup and method of making same

Details Foam bead bottom plastic cup and method of making same Foam bead bottom plastic cup and method of making same

1974-06-17

1976-01-06

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

229 15B, 264 53, 264259, 264321, B29D 2700

Patent

active

039313786

ABSTRACT:
Cups having a plastic, foam sheet sidewall are molded with bottom walls made from pre-expanded, plastic, foam beads. The beads are injected into the bottom of the mold cavity, and steam is introduced into the mold cavity to simultaneously fuse and mold the cup.

REFERENCES:
patent: 3069725 (1962-12-01), Root
patent: 3315018 (1967-04-01), Commeyras
patent: 3344222 (1967-09-01), Shapiro et al.
patent: 3673033 (1972-06-01), MacDaniel et al.
patent: 3792137 (1974-02-01), Seto

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