Toothbrush and method for making such toothbrush
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United States of America Patent
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-
Jun 9, 1998
Grant Date -
N/A
app pub date -
Apr 18, 1995
filing date -
Sep 1, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In making a toothbrush of the type having a shaft-like handle (3), a neck section (4) joining the handle and a headpiece (5) for toothbrush bristles (6), the body is made of a first plastic material through an injection molding step. In order to provide the body with two or more portions (20, 21, 22) made of a second material, the toothbrush body is provided with recess sections (17, 18, 19). The second material is supplied through a plurality of channels (29, 30, 31, 32) into injection nozzle means (33, 34, 35) to provide injection of the section material in a single step, multi-point injection process into the recesses on the body to form the portions (20, 21, 22), the recesses (17, 18, 19) and the portions (20, 21, 22) thus being physically isolated from each otehr by the first material.
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Family
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Cited Art Landscape
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