Destructible core structure and method for using same

Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se – Utilizing surface to be reproduced as an impression pattern

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Details

249 61, 264255, 264316, 264317, 264DIG44, B28B 734

Patent

active

044241836

ABSTRACT:
A destructible core is formed from a frangible plastic shell filled with inert ballast. The core is used for forming complex cavities in the production of cast resin parts.

REFERENCES:
patent: 132299 (1872-10-01), Lightbody, Jr.
patent: 349315 (1886-09-01), Nye
patent: 2217734 (1940-10-01), Dreyfus
patent: 2280074 (1942-04-01), Halsall
patent: 3136831 (1964-06-01), Zinn
patent: 3692551 (1972-09-01), Weaver
patent: 4155970 (1979-05-01), Cassell

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