Method of aperturing thin sheet materials

B - Operations – Transporting – 26 – F

Patent

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Details

B26F 1/24 (2006.01) B26D 7/08 (2006.01) B29C 59/04 (2006.01) B29C 65/08 (2006.01)

Patent

CA 2203404

A method of forming apertures generally greater than about 0.05 square millimeters in a thin sheet material (14). The thin sheet material includes a first side and a second side, at least one side of the thin sheet material is substantially coated with an adhesive (116). The method comprises the steps of (a) placing the adhesive-coated thin sheet material on a patterned anvil (32) having a pattern of raised areas wherein the height of the raised areas is equal to or less than the thickness of the thin sheet material and the adhesive; and (b) subjecting the thin sheet material to a sufficient amount of sonic vibrations to aperture the thin sheet material and the adhesive; and whereby the thin sheet material and the adhesive is apertured in a pattern generally the same as the pattern of raised areas on the patterned anvil (32).

L'invention porte sur un procédé permettant de faire des ouvertures d'une taille généralement supérieure à 0,05 mm<2>, dans un matériau constitué en feuille mince (14). Ce matériau comporte deux faces dont l'une au moins est pratiquement recouverte d'un adhésif (116). Le procédé consiste à (a) placer le matériau en feuille mince recouvert d'adhésif sur une enclume-rouleau à sculptures (32) pourvue d'un ensemble de saillants dont la hauteur est plus ou moins égale à l'épaisseur conjuguée du matériau en feuille et de l'adhésif et, (b) à soumettre ledit matériau à des vibrations soniques en quantité suffisante pour ménager des ouvertures dans celui-ci et l'adhésif. De ce fait, la configuration des ouvertures pratiquées dans le matériau en feuille et l'adhésif est généralement identique à celle des sculptures de l'enclume-rouleau (32).

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