Double-walled container

Details Double-walled container Double-walled container

1986-09-19

1988-07-12

Pollard, Steven M.

Receptacles

Receptacle having flexible, removable inner liner

Means for venting air trapped between the liner and its...

220408, 220445, 220469, B65D 2100

Patent

active

047564466

ABSTRACT:
A double-walled container formed of synthetic resinous material, including generally hemispherically-shaped outer and inner walls nested together with a gap between the walls, a flange extending from the outer periphery of the inner wall to the top edge of the outer wall, the flange and outer wall being permanently joined together so as to form the two walls into a unitary structure. Preferably, the walls are joined together by ultrasonic welding. The top edge of the outer wall is formed with a stepped configuration defining a seat which accommodates a sealing portion of the flange, the sealing portion being fused to the seat. The sealing portion of the flange may either be continuous or formed of individual projections spaced apart along the circumference of the flange. The top surface of the flange may either be flush with, or in a plane above, the uppermost surface of the top edge of the outer wall. A plurality of strengthening ribs project inwardly from the inner surface of the outer wall, the ribs being equidistantly spaced apart along the circumference of the other wall. The flange rests upon the upper surfaces of the ribs.

REFERENCES:
patent: Re19362 (1934-11-01), Justheim
patent: 2213837 (1940-09-01), Gill
patent: 2507425 (1950-05-01), Swartout
patent: 2899098 (1959-08-01), Gits
patent: 3130288 (1964-04-01), Monaco et al.
patent: 3275180 (1966-09-01), Optner et al.
patent: 3365092 (1968-01-01), Blessing
patent: 4478349 (1984-10-01), Haverland, Jr. et al.
patent: 6084519 (1985-06-01), Yagasaki

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