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Tufting toothbrush

A technology of toothbrush and tow, applied in the direction of brushes, brush bodies, household appliances, etc., can solve the problems of unimplantable mold rods, hindering the insertion of clusters, and interference of the injection molding process.

Inactive Publication Date: 2008-07-23
THE GILLETTE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And if the tuft is too large, one or more bristles may not be implanted in the form bar, but curled sideways, preventing the tuft from being fully inserted into the form bar, which will then Interference with the injection molding process
[0007] If it is necessary to position the tufts so that the tufts of the final toothbrush have different lengths and / or different extension angles, the method of delivering pre-cut tufts from a hopper to a mold rod Inherent flaws are usually exacerbated by

Method used

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Embodiment Construction

[0047] The preferred implementation of the present invention generally includes the following steps, which are discussed briefly here and described in more detail below. The process described below is suitable for producing a toothbrush 10 with tufts 12 , 14 , 16 of different lengths, wherein the angles of extension of those tufts also differ from one another, for example for the production of the toothbrush shown in FIG. 1 . In this document, the arrangement of the clusters will be referred to as the cluster geometry. The tufts of bristles are held in a mold bar 28 (see FIGS. 12 and 13 ), which has the desired tuft geometry and is used as part of an injection molding cavity for forming the tufts. Form a toothbrush handle 18 around.

[0048] see in general figure 2 And Fig. 4, the filament bundle that is made up of bristle material is arranged in the form of a plurality of filament bundles 22, and the diameter of each filament bundle 22 and the number of filaments all corres...

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Abstract

Methods and devices are provided for tufting oral brushes. The methods include inserting free ends of continuous strands of filaments into blind openings in a moldbar, at least some of the blind openings having different depths and / or extending at different angles.

Description

technical field [0001] The present invention relates to a method and apparatus for making a cluster toothbrush. Background technique [0002] Conventional toothbrushes generally include tufts of bristles mounted on the head of a toothbrush handle. Until recently, the bristles were generally mounted vertically to the upper surface of the toothbrush head, and the individual tufts were also the same length. Methods and apparatus for installing bristles in this orientation are also known. [0003] Recently, the oral care industry has recognized the advantages of toothbrushes having bristle tufts of different lengths and / or tufts having different angles of extension relative to the toothbrush head. Fig. 1 shows a toothbrush in which the tufts extend at different angles. [0004] A method of manufacturing a toothbrush comprising the steps of: arranging tufts of machined (end spheroidized) bristles such that the raw ends of the bristles extend into a cavity; A toothbrush body i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/14A46D3/00A46D3/04B29C33/12B29L31/42
CPCA46D3/005B29L2031/425B29C45/14385A46B2200/1066
Inventor 威廉·马瑟韦约瑟夫·德普伊特
Owner THE GILLETTE CO