METHOD FOR TAPERING BRISTLE OF A TOOTHBRUSH BY A MECHANICAL METHOD
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United States of America Patent
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Issued Date -
Sep 29, 2011
app pub date -
Aug 31, 2009
filing date -
Oct 27, 2008
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Abandoned
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Abstract
A method for tapering the bristle of a toothbrush using grinding drums which have protrusions with a height of between 1.5 to 7.0 mm, and which rotate in the vertical and horizontal directions. The method includes a step of connecting the grinding drums in parallel, such that the grinding drums are arranged in sequence wherein the heights of the protrusions of each of the grinding drums are gradually decreased, and a step of enabling the toothbrush with a non-tapered bristle to pass through each of the grinding drums in series such that the bristle can be ground. The method of the present invention produces highly tapered bristle having a tapered length of 5 mm or longer and an end thickness of 0.02 mm or less even without immersing the bristle into chemicals, and prevents thermal deformations which may otherwise occur in the tapering process performed by a mechanical method.
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