Plastic article or earthenware shaping or treating: apparatus – Stock pressurizing means operably associated with downstream... – Including additional rotating means downstream of the...
Reexamination Certificate
2005-10-25
2005-10-25
Del Sole, Joseph S. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Stock pressurizing means operably associated with downstream...
Including additional rotating means downstream of the...
C425S205000, C425S209000
Reexamination Certificate
active
06957953
ABSTRACT:
An extruder for extruding extrudate is provided and includes a generally cylindrical barrel portion having an end face. A screw conveyor is rotatably arranged coaxially within the barrel portion and has a downstream end. The screw conveyor has helical flights that define a first flow path with the barrel for the extrudate. The first flow path has a first cross-sectional area. An adapter is arranged on the end face of the barrel portion and defines an exit portion of the extruder. A screw tip is secured to the downstream end of the screw conveyor and extends into the adapter. The screw tip and the adapter define a second flow path for the extrudate with a second cross-section area being at least as large as the first cross-sectional area.
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Ellis Earle L.
Kesselman David A.
Krohn Roy N.
Burdett James R.
Del Sole Joseph S.
Graham Packaging Company L.P.
Venable LLP
Voorhees Catherine M.
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