Device for filament end-rounding and a method for end-rounding toothbrush filaments
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United States of America Patent
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Aug 24, 2021
Grant Date -
Aug 22, 2019
app pub date -
May 1, 2019
filing date -
Jun 5, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
An end-rounding device comprises a movable body comprising an abrasive surface; a gearing for transferring a movement from a motor to the movable body; a providing unit for providing a plurality of bristle filament ends to the abrasive surface, wherein the providing unit comprises a clamping unit for clamping a bunch of filaments, wherein the bunch comprises a multiple of filaments of a bristle tuft; wherein the abrasive surface has a diameter from 80 mm to 300 mm and comprises a concave curvature oriented in the direction of the clamping unit; and wherein the clamping unit is movably spaced from the abrasive surface at a distance. A method of smoothening bristle filament ends utilizes the end-rounding device.
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