Method and apparatus for producing hook fasteners

Details Method and apparatus for producing hook fasteners Method and apparatus for producing hook fasteners

B - Operations, Transporting

29

C

B29C 59/04 (2006.01)

Patent

CA 2749929

Apparatus and process are described for forming projections on a substrate for use as hook-type fasteners in touch fastening systems, wherein vibration energy may be used to soften a substrate which may be positioned between a mold and a source of vibration. The mold may include a plurality of cavities into which the softened substrate may be forced to form the projections. The substrate may comprise a film, sheet, web, compos-ite, laminate, etc. and be useful as an attachment strip for temporary or permanent fastening. The source of vibration may be an ultrasonic horn. The process to form such projections may be operated in a continuous, semi-continuous or intermittent manner.

L'invention concerne un appareil et procédé permettant de former des projections sur un substrat utilisable comme fermeture à crochets dans des systèmes de fixation tactile, une énergie de vibration pouvant être utilisée pour ramollir un substrat qui peut être placé entre un moule et une source de vibration. Le moule peut comporter une pluralité de cavités dans lesquelles le substrat ramolli peut être forcé pour former les projections. Le substrat peut être un film, une feuille, une bande, un composite, un stratifié, etc. et être utilisé comme bande de fixation pour attache permanente ou temporaire. La source de vibration peut être un émetteur ultrasonore. Le procédé de formation de ces projections peut être un procédé continu, semi-continu ou intermittent.

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