Method of making a perforate article

Details Method of making a perforate article Method of making a perforate article

1974-07-03

1976-08-17

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264328, B29H 900

Patent

active

039754910

ABSTRACT:
The method of making a perforated particle screen having a base layer or high density polyethylene low melting index thermoplastic material with a cover layer of elastomeric material vulcanized integrally with the base layer. The method includes providing a mold with inserts for forming the perforations, filling the mold with granular plastic, covering the plastic with uncured elastomer and applying heat and pressure to the elastomer to vulcanize same integrally with the plastic as it melts and flows in the mold.

REFERENCES:
patent: 1474510 (1923-11-01), Campbell
patent: 2358259 (1944-09-01), Siedschlag et al.
patent: 2538198 (1951-01-01), Hosford
patent: 3147705 (1964-09-01), Broderick et al.
patent: 3379806 (1968-04-01), Jaanus
patent: 3678147 (1972-07-01), Patchen

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