Molded bucket and lid having high stack strength

Details Molded bucket and lid having high stack strength Molded bucket and lid having high stack strength

1983-08-01

1985-04-23

Hall, George T.

Receptacles

Closures

Removable closure retained by ductile in situ deformation

220380, 220270, 206505, 206508, B65D 4116, B65D 4118

Patent

active

045124930

ABSTRACT:
A molded bucket comprises a bucket lip defining an enlarged annular projection at the mouth of the bucket; an inwardly positioned annular shelf facing the mouth adjacent the lip; and an outwardly positioned annular flange joined to said bucket adjacent the annular shelf to provide extra hoop strength to the area of the shelf. The lid for the bucket defines an annular recess receiving the annular projection of the bucket lip in locking relation and an annular straight wall which extends radially inwardly from the recess, at an angle of essentially 10.degree. to 60.degree. from the axis of the bucket, with the inner edge extending outwardly toward the mouth relative to the outer edge. The angled annular straight wall serves as a cantilever beam to transmit stacking force to the annular shelf, so that the bucket does not distort or collapse under conditions of high stacking, the bucket being preferably a tapered bucket.

REFERENCES:
patent: 3237803 (1966-03-01), Edwards
patent: 4111329 (1978-09-01), Lampman
patent: 4165020 (1979-08-01), Hoselton
patent: 4420093 (1983-12-01), Von Holdt
patent: 4422559 (1983-12-01), Landis

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