Drying and gas or vapor contact with solids – Apparatus – Vacuum
Patent
1979-12-26
1981-06-30
Camby, John J.
Drying and gas or vapor contact with solids
Apparatus
Vacuum
34 5, F26B 1330
Patent
active
042755115
ABSTRACT:
A vacuum evaporator/sublimator flask apparatus comprises an elastomer cap and a cylindrical glass body. The glass body is a straight-sided cylinder, preferably made of borosilicate glass tubing of sufficient wall thickness to prevent implosion when subject to high vacuum, open at one end and sealed at the other. The elastomer cap is preferably fabricated of clear elastomer in a one-piece molded arrangement which includes an upper neck portion, an outwardly extending sloping intermediate portion terminating in outer downwardly extending walls having an inwardly extending flange at the end thereof to engage the glass body. The neck portion has a tubular opening and a molded-in-place insert at the base of the neck to serve as a stop for rigid tubing that is inserted to permit connection to a vacuum system. The upper portion of the neck includes an inwardly extending portion which engages a vacuum insert. One or more vertical openings are molded into the rubber insert at the base of the stop and extend along the outwardly extending sloping portion of the cap and downwardly along an inner wall portion which is spaced from the downwardly extending outer wall of the cap. The said inner wall is spaced from a further concentric inner wall providing a recess therebetween to engage the upper portion of the cylindrical glass body. In operation, the neck collapses about the vacuum tube to form a seal therebetween and the outer wall portion collapses about the wall of the flask to form a seal thereabout.
REFERENCES:
patent: 2477044 (1949-07-01), Carmean
patent: 2742709 (1956-04-01), Woody et al.
patent: 3238634 (1966-03-01), Voigtlaender-Tetzner
patent: 3246674 (1966-04-01), Kapeker
patent: 3293773 (1966-12-01), Frazer et al.
patent: 4024648 (1977-05-01), Bender
Dimitroff Michael V.
Parkinson Martin
Bio-Vac Incorporated
Camby John J.
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