Brush – broom – and mop making – Processes
Patent
1991-12-30
1992-11-24
Rosenbaum, Mark
Brush, broom, and mop making
Processes
A46D 100
Patent
active
051657619
ABSTRACT:
A method of making toothbrushes having bristle tufts with ends in two or more distinct planes, all of said bristle tufts having individual bristles which are substantially uniformly rounded at their free ends. The method of making is a repeated sequence of steps used to attach all of the bristle tufts of the shortest overall length followed by cutting and end rounding of the individual bristles in the first group of tufts while all of the free ends of the bristles are in a first plane. This is done prior to affixing the next group of bristle tufts of greater overall length. The cutting and end rounding sequence is thereafter repeated for each ascending bristle tuft elevation. The final toothbrush bristle contour is a function of the pattern of attachment for each bristle tuft elevation.
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Chin Frances
Linman E. Kelly
O'Flaherty Thomas H.
Rosenbaum Mark
The Procter & Gamble & Company
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