Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Patent
1989-02-06
1990-11-13
Schwartz, Pamela R.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
264275, 264276, 428156, 428192, B32B 310
Patent
active
049701037
ABSTRACT:
A preformed part made of plastics material, especially a sheet-like plastics part made by injection molding is formed to be integral with elastic portions. The elastic portions serve as seals, as for feed-through holes in the plastics part. A ring-shaped circular closed protruding edge or ring-shaped rib, formed integrally with the plastics part around the regions to be coated with rubber, limit the region where elastic material is deposited to integrate with the plastics material. An annular region around rib has a radial span around the recesses, bore holes or edges into which the rubber material is injected, and enables insertion of the elastic material despite the presence of differential thermal expansion between the plastic part and a metal forming tool to shape the elastic material.
REFERENCES:
patent: 3398222 (1968-08-01), Kaufman, Jr. et al.
Kaminski Peter
Wolf Franz J.
Schwartz Pamela R.
WOCO Franz-Josef Wolf & Co.
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