초록 ▼

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

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.

대표청구항 ▼

[ We claim:] [1.] A method for making a toothbrush having a body with a shaft-like handle, a head piece, toothbrush bristles, a neck section joining said handle to the head piece, the head piece for retaining toothbrush bristles, said body being made of a first plastic material through an injection

[ We claim:] [1.] A method for making a toothbrush having a body with a shaft-like handle, a head piece, toothbrush bristles, a neck section joining said handle to the head piece, the head piece for retaining toothbrush bristles, said body being made of a first plastic material through an injection molding step, and said body being provided with two or more portions made of a second material, through a second injection molding step, wherein said second material provided through said section injection molding step is injected through a single step, multi-point injection process into spaced apart recesses on said body to form said portions, said portions thus being physically isolated from each other by said first plastic material.