Bristle sub-assemblies having parallel pairs of bristles;...

A - Human Necessities – 46 – B

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A46B 5/06 (2006.01) A46D 1/08 (2006.01) A46D 3/05 (2006.01)

Patent

CA 2387165

An apparatus for forming bristle sub-assemblies includes a vertically oriented slot, which is formed by two endless belts (52, 54). A wheel (76) disposed above the slot pushes a bristle string into the slot. The bristle string has a plurality of bristles connected to a base string in two rows. The bristle rows can be horizontally oriented, so that all of the bristles are co-planar in a horizontal plane, or they can be angularly oriented with the base string at the vertex of the angle. When the bristles are pushed into the slot, they bend to adopt a new, substantially parallel orientation. An ultrasonic heater (80) heats the bent bristles to re-set the thermoplastic material from which the bristles are made so that the cooling, the parallel orientation is maintained.

Cette invention concerne un dispositif permettant de former des sous-ensembles de poils, qui comprend une fente orientée dans le sens vertical entre deux courroies sans fin (52, 54). Une roue (76) disposée au dessus de la fente pousse un cordon de poils dans la fente. Le cordon de poils comporte une pluralité de poils reliés au cordon de base, en deux rangées. Les rangées de poils peuvent être orientées soit dans le sens horizontal de sorte que la totalité des poils est située dans le même plan horizontal, soit angulairement, avec le cordon de base au sommet de l'angle. Lorsqu'ils sont poussés dans la fente, les poils se cintrent et adoptent une nouvelle orientation sensiblement parallèle. Un appareil de chauffage à ultrasons (80) chauffent les poils cintrés pour reformer le matériau thermoplastique dans lequel sont faits les poils. Ainsi, l'orientation parallèle est maintenue après refroidissement.

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