Gas separation – Combined or convertible
Patent
1996-10-24
1998-06-02
Smith, Duane S.
Gas separation
Combined or convertible
553852, 55DIG29, 53425, 53561, 53574, 264525, 264542, 425210, 425524, 425534, 425535, 454187, 454191, B01D 4600
Patent
active
057592187
ABSTRACT:
In an apparatus for extruding plastic into a length of parison in the form of a vertically oriented hollow tube, molding a container from the parison and for filling the container with liquid product, the apparatus having a extruder, with a parison head, for forming the parison, a hot knife for cutting the parison to a selected length with concomitant release of plastic particulates, gripping apparatus for maintaining an opening at a top of the cut parison, a sealer for sealing a bottom of the cut parison, vacuum apparatus for molding the container with a temporary top opening, an extendable and retractable nozzle for filling the molded container through the temporary top opening with the liquid product and a sealer for sealing the filled container, the improvement including an outer shroud for surrounding the extruder, including the parison head, with H.E.P.A. filtered air, an inner shroud, in communication with a vacuum exhaust and disposed around the parison head, for preventing the particulates from entering the parison upon cutting thereof by the hot knife, and a third shroud, surrounding the nozzle, for directing H.E.P.A. filtered air into the molded container before and during liquid filling thereof.
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Martin Blake E.
Palmer Richard D.
Wood Robert P.
Allergan
Hackler Walter A.
Smith Duane S.
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