B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 47/06 (2006.01) B67D 7/02 (2010.01) B67D 7/76 (2010.01) B67D 99/00 (2010.01) B29C 49/22 (2006.01) B65D 1/20 (2006.01) B65D 51/16 (2006.01) B65D 85/84 (2006.01)
Patent
CA 2256790
A blow molded drum has a port including a neck with exterior buttress threads and a port opening having a sleeve fusion bonded in the neck. The sleeve having a inner cylindrical sealing surface, and a shoulder. A drop-in down tube assembly seats with the shoulder and has an upwardly extending nipple. Either a dispense head or a closure radially seals within the sleeve and is secured by a retainer with interior buttress threads engaging with the exterior threads on the port neck. The dispense head has a first flow duct extending to a nipple engaging portion to seal with the upwardly extending nipple and a second flow duct leading to an annular space around the nipple for a return fluid line or for providing air or a gas for displacing withdrawn fluid. The closure is preferably comprised of a cylindrically shaped interior liner portion for engaging and sealing with the cylindrical sealing surface of the sleeve, such as by an o-ring, and has a pathway which includes the spiral gap between the cooperating buttress threads on the neck and on the retainer. A microporous membrane may be placed in the pathway to allow venting of gases but preclude leakage of the liquid in the drum.
Hennan John M.
Rauworth Barry L.
Borden Ladner Gervais Llp
Entegris Inc.
Fluoroware Inc.
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