Rotatable bowl assembly for centrifugal processing apparatus hav

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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138111, 138125, 138126, 138129, 138141, 138150, 156 83, 156196, 156296, 156305, 1563086, 494 17, 494 18, 494 42, B31F 2310, B32B 3100, C09J 500, C09J 502

Patent

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044591691

ABSTRACT:
A rotatable processing bowl assembly adapted for mounting in a centrifuge includes an umbilical tubing system formed of a plurality of individual flexible tubes each of which communicates with the processing bowl. Each tube has an exterior wall and includes a first portion extending adjacently from the bowl and a second portion which is spaced from the bowl. The exterior walls of the tubes are bonded together along their first portions so that the joined exterior walls collectively define the outer periphery of the tubing system along the first portions of the tubes. Preferably, the tubes are also wound to form a predetermined helical pattern along their first portions. This arrangement enhances the tubing system's durability and resistance to fatigue along the bonded together first portions, particularly at higher rotational speeds, and permits direct, facile connection of the free and unattached second portions with external apparatus.

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Excerpt from Science, vol., (Sep., 1975) "New Flow-Through Centrifuge Without Rotating Seals Applied to Plasmapheresis," pp. 999-1000.

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