Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1994-04-11
1995-05-02
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
156 66, 264 407, 2251311, 225192R, 225461, B29C 4714
Patent
active
054116929
ABSTRACT:
An integral reclosable bag die assembly for extruding a bag film and a closure profile integrally connected thereto, includes a die including an inlet port for receiving molten polymeric material, an elongated outlet port for discharging the molten material, and a coat hanger plenum extending between the inlet and outlet ports for channeling the molten material from the inlet port to the outlet port. The outlet port includes a pair of elongated lips disposed opposite one another. One of the lips is detachably interlocked to a remaining portion of the die and has a closure profile extrusion site configured in the form of the closure profile. The plenum opens into a diverting channel at an upstream location thereof to divert a portion of the molten material from the plenum into the diverting channel. The diverting channel extends from the upstream location of the plenum to the closure profile extrusion site so as to feed the diverted portion of the molten material to the closure profile extrusion site and form the closure profile. The closure profile extrusion site can be a removable insert detachably interlocked to the one of the die lips and having the closure profile formed therein. A choker bar disposed within the plenum is used to spread the molten material flowing downstream through the plenum.
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DiPietro David
Tomic Mladomir
McDonald Alan T.
Reynolds Consumer Products Inc.
Thurlow Jeffery R.
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