Method and apparatus for producing a plastic container having a reclosable fastener
AssigneeUnion Carbide Corporation
InventorEwald A. Kamp
Life of this patent
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Abstract
An apparatus for producing a plastic container having occludable closure strips comprises a source for the closure strips, a rotatable casting cylinder having a pair of spaced apart circumferential grooves defined therein, a mechanism for advancing the closure strips to the casting cylinder, an extruder for casting a plastic film onto the casting cylinder so that it becomes connected to base portions of the closure strips, and a chill roll for receiving the combination of plastic film and closure strips to provide cooling.
Claims10
An apparatus for producing a plastic film connected to a pair of occludable closure strips, each of said closure strips having profile and base portions;
- said apparatus comprising:
- feeding means for supplying said closure strips;
- a rotatable casting cylinder having a pair of spaced apart circumferential grooves defined therein;
- advancing means for advancing said closure strips to said casting cylinder so that respective unoccluded profile portions of said closure strips extend into the respective grooves of said casting cylinder;
- extruding means for casting a plastic film onto said casting cylinder so that said plastic film becomes connected to said base portions of said closure strips;
- urging means for pressing said plastic film against said base portions;
- and
- cooling means for receiving the combination of said plastic film and closure strips to provide cooling.
A method for producing a plastic film connected to a pair of occludable closure strips, each of said closure strips having profile and base portions;
- said method comprising the steps of
- supplying said closure strips;
- advancing said closure strips to a rotatable casting cylinder having a pair of spaced apart circumferential grooves so that respective unoccluded profile portions of said closure strips extend into the respective grooves of said casting cylinder;
- extruding a plastic film onto said casting cylinder so that said plastic film becomes connected to said base portions of said closure strips;
- and
- thereafter, cooling the combination of said plastic film and closure strips.
Dependencies are inferred from the claim text.