Pile weatherstripping and methods of making same

Details Pile weatherstripping and methods of making same Pile weatherstripping and methods of making same

E - Fixed Constructions

06

B

E06B 7/22 (2006.01) D04D 5/00 (2006.01)

Patent

CA 2444190

Pile weatherstripping has a pile of yarn segments (20) which are attached to a flexible plastic backing strip (1) by ultrasonic welding (21) of the pile thereto. Loops of the yarn (20) are captured in a channel (16) on one side of the backing strip. This channel is formed by extracting flanges (15) from the backing strip by a cutting tool (FIG. 8) having a pair of chiseled cutting surfaces (2a, 2b) tapering inwardly and spaced from each other. The backing strip is preferably wound on a capstan (9) in a plurality of turns so as to feed the strip past the cutting tool. The cutting tool leaves notches along the channel on the outside of the flanges. The base of the channel is unaffected by the cutting tool and presents a stress-free surface at which the yarn is welded. The notches improve the bending strip flexibility of the backing so as to facilitate insertion of the weatherstrip into a T-slot (22).

L'invention concerne un bourrelet de poil qui se présente sous la forme d'une couche de segments de fil (20) fixée sur une bande dorsale en plastique (1) par soudage ultrasonore (21). Les boucles de fil (20) sont prises dans un canal (16) sur un côté de la bande. Ce canal est constitué par l'extraction de brides (15) à partir de la bande au moyen d'un outil tranchant (figure 8) à paire de surfaces tranchantes en biseau (2a, 2b) décroissant vers l'intérieur et espacées. De préférence, la bande est enroulée sur un cabestan (9), en plusieurs tours, et le cabestan déroule la bande devant l'outil tranchant, qui laisse des encoches le long du canal à l'extérieur des brides. La base du canal n'est pas affectée par l'outil tranchant et présente une surface non contrainte sur laquelle sont soudés les fils. Les encoches améliorent la flexibilité de courbure de la bande, facilitant l'insertion du bourrelet dans une rainure en T (22).

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