Method of producing film with through-holes

Abstract

A film 2 made of an elastic material is stretched in at least one direction parallel to a surface of the film and then through-holes 25 are punched in the film in the state where the film is stretched. After the punching is completed, the stretching is terminated, so that the film recovers its original shape. Preferably the through-holes are formed using needles 115. The film may be used in an ink transfer printer (Fig 4).

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Patent Citations (4)

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    GB-1120578-AJuly 17, 1968Grace W R & CoImprovements in the production of porous film
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Cited By (4)

    Publication numberPublication dateAssigneeTitle
    EP-2612575-A1July 10, 2013Insta-Mix, Inc. Subsidiary a (dba Umix, Inc.)Elément de contrôle de l'écoulement possédant une membrane élastique dotée de trous d'épingle
    US-7799254-B2September 21, 2010AMCOR Packaging (Australia) PtyMethod for the treating films
    US-8833216-B2September 16, 2014Amcor LimitedMethod and an apparatus for perforating polymeric film
    WO-9948653-A1September 30, 1999Deutsche Institute für Textil- und Faserforschung Stuttgart - Stiftung des öffentlichen RechtsMembrane permeable a la vapeur d'eau