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US 2014/0014271 A1Published application
Device for producing tubular structures
AssigneePacksys Global (Switzerland) Ltd.
InventorRene Weber
Life of this patent
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AssigneePacksys Global (Switzerland) Ltd.
InventorRene Weber
Estimating the term…
A device for producing tubular structures for packaging tubes, comprising an elongate mandrel (3) extending axially, around which a substrate web can be subjected to a forming process to produce a tubular moulding (4), where, within the mandrel (3), there are a plurality of gas-outlet apertures (15) to which compressed gas can be applied to produce a gas cushion, in particular an air cushion, between the mandrel (3) and the tubular moulding (4), and where there are welding means for welding the tubular moulding, and where, with the aid of means (19) arranged radially adjacent to the mandrel (3) and capable of providing a combination of pressure-application and conveying, the tubular moulding (4) can be forced radially inwards in a direction towards a mandrel surface (16) which belongs to the mandrel (3) and which is convexly curved in a circumferential direction, and the tubular moulding (4) can be transported in a direction of the longitudinal direction of the mandrel (3) by virtue of a frictional effect between the means and the tubular moulding (4).
1-15. (canceled)
A device for producing tubular structures for packaging tubes, comprising an elongated mandrel extending in an axial direction, around which a substrate web can be shaped to produce a tubular shape, the mandrel is provided with a plurality of gas outlet openings for receiving compressed gas to generate a gas cushion between the mandrel and the tubular shape, welding means for welding the tubular shape, combined pressure-application and conveying means disposed radially adjacent to the mandrel for pressing the tubular shape radially inwards in a direction of a mandrel surface of the mandrel, the mandrel surface being convex-curved in the circumferential direction, and the tubular shape is transported in the direction of the longitudinal direction of the mandrel by means of a friction effect between the pressure-application and conveying means and the tubular shape, and wherein the mandrel surface is constituted, at least in sections, by a microporous and/or nanoporous material which form the gas outlet openings in the form of pores, and that the gas outlet openings are constituted such that the generated gas cushion counteracts the pressure-application force of the combined pressure-application and conveying means.
A method for producing tubular structures for packaging tubes, comprising the steps of:
Dependencies are inferred from the claim text.