Plastic tumbler and method and apparatus for making same

Details Plastic tumbler and method and apparatus for making same Plastic tumbler and method and apparatus for making same

1979-03-28

1981-07-07

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

B29F 100

Patent

active

042774357

ABSTRACT:
A tumbler is formed of injected plastic material that has different directional strengths by injecting the plastic material somewhat tangentially to cause the plastic material to move peripherally in the rim defining portion of the mold cavity in order to have the weaker directional strength also extend peripherally to thereby increase the tumbler's resistance to lengthwise splitting from the rim to the bottom and in which the mold is vented into a cooling passageway.

REFERENCES:
patent: 2199144 (1940-04-01), Tegarty
patent: 2372177 (1945-03-01), Conner
patent: 3247550 (1966-04-01), Haines
patent: 3626051 (1971-12-01), Liautaud
patent: 3907952 (1975-09-01), Cleereman
patent: 3975494 (1976-08-01), Tritenne
patent: 4091069 (1978-05-01), Allen
patent: 4177238 (1979-12-01), Allen

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