Toothbrush head with anchor-free bristle tufting
First Claim
1. A toothbrush head, comprisinga bristle carrier sized for insertion into a human mouth, and bristles constructed to brush teeth attached to said bristle carrier, said bristles being grouped in tufts that are seated in multiple holes in the bristle carrier and fastened by their ends close to a rear side of the bristle carrier by one of the group consisting of welded bonds, adhesive bonds and bonds resulting from casting in place, at least one hole in the bristle carrier being divided by at least one transverse wall into plural segments, said at least one transverse wall being constructed such that the bristles seated in the segments form a common tuft with a smooth and closed outer contour corresponding to the contour of the hole.
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Accused Products
Abstract
The invention is directed to a brush head, in particular a toothbrush head, having a bristle carrier and bristles attached thereto, which are seated in the form of tufts in holes in the bristle carrier and fastened by their ends close to the bristle carrier to the bristle carrier without anchoring, in particular by welding and/or adhesive bonding to a rear side of the bristle carrier using the method referred to as anchor-free tufting. According to the invention, at least one hole (2) in the bristle carrier (1) is divided by means of at least one transverse wall (4) into several segments and said at least one transverse wall is constructed such that the bristles seated in the segments form a common tuft (3) with a smooth and closed outer contour corresponding to the contour of the hole and are supported by the transverse wall.
115 Citations
27 Claims
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1. A toothbrush head, comprising
a bristle carrier sized for insertion into a human mouth, and bristles constructed to brush teeth attached to said bristle carrier, said bristles being grouped in tufts that are seated in multiple holes in the bristle carrier and fastened by their ends close to a rear side of the bristle carrier by one of the group consisting of welded bonds, adhesive bonds and bonds resulting from casting in place, at least one hole in the bristle carrier being divided by at least one transverse wall into plural segments, said at least one transverse wall being constructed such that the bristles seated in the segments form a common tuft with a smooth and closed outer contour corresponding to the contour of the hole.
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17. A method of making a toothbrush head, comprising
providing a bristle carrier having multiple holes and sized for insertion into a human mouth, dividing at least one said hole by at least one transverse wall into plural segments, and attaching bristles constructed to brush teeth and grouped in tufts in said holes in said bristle carrier by fastening ends of said bristles close to a rear side of the bristle carrier by one of the group consisting of welded bonds, adhesive bonds and bonds resulting from casting in place, said at least one transverse wall being constructed such that the bristles seated in the segments form a common tuft with a smooth and closed outer contour corresponding to the contour of the hole.
Specification