Brush filament bundles and preparation thereof
First Claim
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1. A method for manufacturing filament bundles for use in the manufacture of bristle tufts for a toothbrush, the method comprising:
- (a) advancing a bundle comprising a plurality of long, continuous strands of filaments through a bonding device in the direction of a longitudinal axis of the bundle, each continuous strand of filament having a first end and a second end;
(b) forming at least one bond between the plurality of continuous strands of filaments, intermediate the first ends and second ends of the filaments, wherein forming the at least one bond between the plurality of continuous strands of filaments prevents the filaments from moving axially with respect to each other;
(c) advancing the bundle further through the bonding device; and
(d) forming at least one subsequent bond, axially spaced from the bond formed in step (b) along the longitudinal axis of the bundle to provide an unbonded region between the bonds.
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Abstract
Methods and devices are provided for forming filament bundles of long, continuous strands of filaments. The methods include bonding the long, continuous stands of filaments together so that they cannot move axially with respect to any other filament in the bundle. Methods of bonding include ultrasonic welding, freezing or applying adhesive.
39 Citations
19 Claims
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1. A method for manufacturing filament bundles for use in the manufacture of bristle tufts for a toothbrush, the method comprising:
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(a) advancing a bundle comprising a plurality of long, continuous strands of filaments through a bonding device in the direction of a longitudinal axis of the bundle, each continuous strand of filament having a first end and a second end; (b) forming at least one bond between the plurality of continuous strands of filaments, intermediate the first ends and second ends of the filaments, wherein forming the at least one bond between the plurality of continuous strands of filaments prevents the filaments from moving axially with respect to each other; (c) advancing the bundle further through the bonding device; and (d) forming at least one subsequent bond, axially spaced from the bond formed in step (b) along the longitudinal axis of the bundle to provide an unbonded region between the bonds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19)
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16. A method for manufacturing filament bundles for use in the manufacture of bristle tufts for a toothbrush, the method comprising:
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(a) advancing a bundle comprising a plurality of long, continuous strands of filaments through a bonding device in the direction of a longitudinal axis of the bundle, the filaments being suitable for use in the manufacture of toothbrush bristles; (b) shaping the bundle to the shape of a tuft on the toothbrush; and (c) forming a plurality of bonds spaced axially along the length of the plurality of continuous strands of filaments, wherein the bonds prevent the filament from moving axially with respect to each other.
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Specification