Patent ID: 8172337
Filing Date: 2012-05-08
Classification: A46B,A46D

Abstract:
1. A method of manufacturing a toothbrush having a head portion, the method comprising: cutting filaments so as to form bristles; immersing first ends of the bristles in an alkaline or acidic solution until the first ends of the bristles have a length of tapering between 3 and 7 millimeters and respective chemically shaped blunt end points have various diameters of between 0.01 and 0.07 millimeters; immersing second ends of the bristles in an alkaline or acidic solution until the second ends of the bristles have a length of tapering between 3 and 7 millimeters and respective chemically shaped blunt end points have various diameters of between 0.01 and 0.07 millimeters; folding each of the bristles into an asymmetric U-shape such that said first end has a height difference with respect to said second end, the height difference being between 0.5 and 2 millimeters; and disposing each of the folded bristles on the head portion of the toothbrush.