Transverse direction zipper end sealer
AssigneeIllinois Tool Works Inc.
InventorEric P. Plourde
Life of this patent
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Abstract
An apparatus, device and method for producing end seals on a continuous supply of fastener strip having first and second interlocked profiles before the fastener strip is attached to a supply of thermoplastic film used to make a reclosable bag. The fastener strip is advanced through a guide. A first section is identified and fused thereby providing a first end seal. A second end section is identified with the identification based on the first end seal. The second section is fused, thereby providing a second end seal with the result of a length of fastener strip including a pair of end seals. A device is provided to simultaneously fuse and cut the fastener strip at the exiting end of the fastener guide.
Claims4
A method for producing end seals on a continuous supply of fastener strip for subsequent attachment to a thermoplastic web in a bag making machine, said method comprising the steps of:
- providing said continuous supply of fastener strip, said fastener strip including first and second interlocking profiles with said profiles interlocked along an interlocking length;
- advancing said continuous supply of fastener strip within a guide;
- identifying a first end section of said continuous supply of fastener strip, said first end section consisting essentially of an interlocked first portion of said fastener strip;
- fusing only the first end section such that a first of the end seals is provided;
- identifying a second end section of said continuous supply of fastener strip with said identification based on a measurement from said first end section, said second end section consisting essentially of an interlocked second portion of said fastener strip;
- and
- fusing only the second end section such that a second of the end seals is provided thereby creating a length of said continuous supply of fastener strip for subsequent attachment to said thermoplastic web said length including said first and said second end seals.
Dependencies are inferred from the claim text.