Brush finishing machine and a method of profiling toothbrush bristle tufts
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United States of America Patent
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-
Nov 4, 1997
Grant Date -
N/A
app pub date -
Aug 4, 1995
filing date -
Aug 4, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A toothbrush finishing machine and method are provided for producing toothbrushes with profiled, or contoured, patterns of bristle tufts. The bristles are selectively trimmed to different lengths using successively a plurality of different rotating cutting devices which each have a substantially cylindrical cutting surface with an axial gap therein. The axial gap of each preceding cutting device is wider than the corresponding axial gap of a succeeding axial device. Each rotating cutting device is followed by a rounding device provided for rounding the free end of the bristles. Each rounding device has deflecting members to selectively deflect bristles other than those trimmed in the preceding trimming step, so that the trimmed bristles have their ends projecting beyond the deflected bristles. The projecting bristle ends are engaged by the rounding device to be rounded.
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