Creep resistant sealing arrangement for bell jar

Details Creep resistant sealing arrangement for bell jar Creep resistant sealing arrangement for bell jar

1975-10-31

1976-12-21

Price, William

Bottles and jars

Ejecting

Siphon type

215352, 220 69, 220 73, 220 82R, 220320, 220378, B65D 110, B65D 2300, B65D 4532

Patent

active

039983471

ABSTRACT:
The invention is concerned with an improved creep resistant sealing arrangement for a bell jar which is used in vacuum work. The bell jar generally consists of a closed top cylindrical container having an open bottom defining a planar rim. The rim generally seats against a flat surface with a gasket between the rim and the surface. A vacuum source communicates with the interior of the bell jar. The sealing arrangement of the present invention comprises a unitary resilient elastomeric ring having a generally J-shaped cross-section, an outer leg of which fits against the outside of the bell jar, an inner leg of which fits against the inside of the bell jar and a cross member of which fits against the rim of the bell jar. Also part of the sealing arrangement is means for fastening the outer leg radially against the outside of the bell jar. Such fastening means can comprise a metal band resembling an enlarged hose clamp, a tape fastening the outer leg to the outside of the bell jar, or an adhesive placed between the outer leg and the outside of the bell jar.

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