Method and device for producing a hook-and-pile type closure...

A - Human Necessities – 44 – B

Patent

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A44B 18/00 (2006.01)

Patent

CA 2268537

The invention relates to a process and a device for manufacture of an adhesive fastening element with interlocking means integrated with a backing. The interlocking means are produced by introducing a thermoplastic into the gap between a pressure roller and a shaping roller. This shaping roller has a screen with openings which are produced by etching or by means of a laser so that the finished interlocking means result exclusively from the circumstance that the thermoplastic hardens at least in part in the openings in the screen. This makes it possible to prepare the shaping roller at very low cost. In addition, a previously customary second process step in formation of the interlocking means is eliminated.

L'invention concerne un procédé et un dispositif pour produire une pièce de fermeture adhésive avec des éléments d'arrimage formés d'un seul tenant avec un support. Les éléments d'arrimage sont obtenus par acheminement d'un thermoplastique jusqu'à un espace entre un cylindre compresseur et un cylindre de formage. Ce dernier présente un tamis avec des évidements ouverts réalisés par corrodage ou à l'aide d'un laser, de manière que les éléments d'arrimage finis ne s'obtiennent que par durcissement au moins partiel du thermoplastique dans les évidements ouverts du tamis du cylindre de formage. Ce procédé permet de réaliser des cylindres de formage très économique et rend par ailleurs superflue une seconde opération jusqu'à présent habituelle lors de la réalisation des éléments d'arrimage.

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