Contamination-preventing closure

Details Contamination-preventing closure Contamination-preventing closure

1978-03-06

1979-10-16

Hall, George T.

Receptacles

Closures

Superposed closures for common opening

105377, B65D 5118

Patent

active

041710614

ABSTRACT:
A closure including a rigid thermoplastic member with a horizontally extending first portion occupying a major portion of the cross-sectional area within the loading aperture which is surrounded by the loading member of the hopper car, a second portion extending upwardly from the first portion which is inwardly adjacent of the interior of the loading member and a third portion extending outwardly from the second portion and overlaying the top of the loading member and underlaying the hatch cover of the hopper car when the hatch cover is in its closed position. Also a flexible plastic member overlaying the rigid thermoplastic member and the loading member and underlaying the hatch cover when the hatch cover is in its closed position.

REFERENCES:
patent: 2104540 (1938-01-01), Hoffman
patent: 3570703 (1971-03-01), MacRae

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