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AssigneeSekisui Jushi Kabushiki Kaisha
InventorsKuniaki Fujita, Kazuyuki Oba, Yukou Usuda, Satoru Tajika, Tetsuya Marutani, Izuru Kawamoto
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The present invention relates to: a packaging strap coil and its production method, wherein the innermost strap end is securely fixed to prevent un-winding thereof and the strap can be smoothly drawn out to the innermost end for strap-packaging of an item; a packaging strap coil unit which prevents deformation of the strap coil; and a packaging machine. The strap coil 11 comprises a number of layers of a resin packaging strap 11a wound helically and carelessly around a hollow 11b defining the axis of the strap coil 11. The strap 11a is made of a thermoplastic resin at least on its external surface. In the strap coil 11, a plurality of perforations 11d are pierced in the vicinity of an innermost end of the strap 11a through to a plurality of laminated layers. Each perforation 11d provides a melt-bonded area 11e along its periphery to bond the laminated layers of the strap 11a together.
A packaging strap coil comprising a plurality of layers of a packaging strap spaced apart from and wound helically around an axis of the strap coil forming a hollow strap coil including a plurality of coiled strap layers, the strap being made of a thermoplastic resin at least on an external surface thereof and having an innermost strap end disposed within the hollow strap coil, wherein a plurality of perforations are formed in and through the innermost strap end into a plurality of strap layers, and wherein the innermost strap end and subsequent strap layers are melt-bonded to each other through each perforation to form laminated strap layers.
A method for producing a packaging strap coil comprising the steps of:
A method for producing a packaging strap coil comprising the steps of:
A packaging strap coil, comprising:
Dependencies are inferred from the claim text.