Method and apparatus for capping stem fasteners

B - Operations – Transporting – 29 – C

Patent

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B29C 67/00 (2006.01) A44B 18/00 (2006.01)

Patent

CA 2277118

A method and apparatus for capping headed stem fasteners. The precursor web (54) having a backing (56) with a rear surface (58), a front surface, and a multiplicity of polymeric stems (60) projecting distally from the front surface of the backing is fed into a variable nip (64) between a heated member opposite a support surface (68). The support surface (68) has a shape generally conforming to the contour of the heated member (66). The variable nip (64) compressively engages the polymeric stems between the heated member (66) and the support surface (68) so that distal ends of the polymeric stems are deformed. The heated member (66) can be a heated roll or a heated belt. The support surface (58) may be a curved capping shoe or a belt shaped to create a particular nip profile.

L'invention concerne un procédé et un appareil permettant de former des dispositifs de fermeture à tiges pourvues d'une tête. La bande de matériau précurseur (54), qui présente un support (56) pourvu d'une surface arrière (58), d'une surface avant et d'une multiplicité de tiges (60) de polymère faisant saillie à partir de ladite surface avant, est introduite dans une zone de contact (64) variable située entre un organe chauffé et une surface de support opposée. Ladite surface de support (68) a une forme qui épouse, de façon générale, le contour de l'organe chauffé (66). Dans la zone de contact variable (64), les tiges de polymère sont comprimées entre l'organe chauffé (66) et la surface de support (68), de sorte que les extrémités distales de ces tiges de polymère sont déformées. L'organe chauffée (66) peut être un cylindre chauffé ou une bande chauffée. La surface de support (58) peut être une mâchoire incurvée de formage d'extrémité ou une bande configurée pour créer une zone de contact présentant un profil particulier.

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