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WO1998027847A9 - Ameliorations relatives a la fabrication de brosses - Google Patents

Ameliorations relatives a la fabrication de brosses

Info

Publication number
WO1998027847A9
WO1998027847A9 PCT/US1997/022683 US9722683W WO9827847A9 WO 1998027847 A9 WO1998027847 A9 WO 1998027847A9 US 9722683 W US9722683 W US 9722683W WO 9827847 A9 WO9827847 A9 WO 9827847A9
Authority
WO
WIPO (PCT)
Prior art keywords
elastomer
head
handle
implement
segments
Prior art date
Application number
PCT/US1997/022683
Other languages
English (en)
Other versions
WO1998027847A1 (fr
Filing date
Publication date
Priority claimed from GBGB9626862.8A external-priority patent/GB9626862D0/en
Application filed filed Critical
Priority to US09/331,815 priority Critical patent/US6514445B1/en
Priority to EP97954082A priority patent/EP0971610A1/fr
Priority to CA002274044A priority patent/CA2274044A1/fr
Publication of WO1998027847A1 publication Critical patent/WO1998027847A1/fr
Publication of WO1998027847A9 publication Critical patent/WO1998027847A9/fr

Links

Definitions

  • a second, elastomeric component such as a thermoplastic elastomer
  • the two component brush is typically now made by injection moulding, such as described in "Zahoransky's fully automatic two-colour mould", Brossa Press (1989).
  • the process typically involves a first moulding step in which a thermoplastic body is made, incorporating voids to accept the elastomer.
  • the elastomer is injected into the voids where it will typically become partially mechanically anchored, on cooling and setting, and also fused to the thermoplastic body.
  • the demands on the joint between the thermoplastic body and the elastomer are, typically, not high.
  • a foaming agent such as Hydrocerol HP20DP from Boehringer- Mannheim is mixed with the polypropylene at a level of from about 1% to about 3%, preferably from about 1.5% to about 2.5%, by weight of the polypropylene.
  • the foaming agent assists the flow of the polypropylene during moulding and, in particular, helps to ensure uniform formation ' of hinges, where used.
  • the handle itself is generally rigid and may be of a shape which is conventional in the manufacture of toothbrushes.
  • the handle may comprise a neck portion which is more flexible than the rest of the handle, for example by inclusion of a flexible joint as described herein.
  • the elastomer is stretched by linear deflection, bending or torsional movements of a segment relative to the adjacent segment or handle. Since, for some geometries of segment-segment or segment-handle connections, or for bending or torsional movements of one segment relative to its neighbour, there will be varying extents of elastomer stretching across an interface, care is required in measuring partial detachment. In such cases of differential elastomer extension, at each point on any one interface to be measured, the stretching should be measured along a line drawn through the elastomer which is perpendicular to the interface at the point where separation is to be determined, when the implement is in its rest, unstressed state. In bending or torsional modes it may be that this line will deviate from the perpendicular as one segment is moved relative to the other.
  • toothbrushes according to this invention can be used for cleaning the teeth by an entirely conventional tooth brushing hand action, preferably in a manner recommended by dental health authorities.
  • the implement can also be an electrically driven toothbrush.
  • Fig. 1 is a perspective view of a toothbrush according to the invention. Some of the bristles are omitted for the sake of clarity.
  • Fig. 2 is a partial side view of the head of a toothbrush according to the invention.
  • a toothbrush 1 has a head 2 which is co-moulded with the handle 5, the head being concave along its longitudinal axis on the top face 3. Voids 13 in the handle are filled with elastomer to provide hand grips.

Abstract

L'invention porte sur le procédé de fabrication de l'articulation souple élastique en deux parties d'un article pour soins personnels consistant à injecter un élastomère dans une cavité (13) formée dans un manche (5) de plastique ou dans une tête (2) à une température d'au moins 245 °C, ce qui fusionne l'élastomère et le plastique et crée l'articulation souple élastique. L'invention porte également sur un article pour soins personnels comportant une articulation souple élastique reliant un matériau plastique présentant un point de ramollissement Vicat de moins de 245 °C à un élastomère, ledit élastomère étant fusionné au matériau plastique de manière à pouvoir être étiré jusqu'à 120 % de sa longueur à l'état non étiré sans provoquer de séparation entre l'élastomère et le plastique. L'invention assure une adhérence améliorée entre l'élastomère et le plastique permettant à l'articulation de mieux supporter les flexions répétitives. La durabilité de l'article s'en trouve améliorée.
PCT/US1997/022683 1996-12-24 1997-12-12 Ameliorations relatives a la fabrication de brosses WO1998027847A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US09/331,815 US6514445B1 (en) 1996-12-24 1997-12-12 Brush making
EP97954082A EP0971610A1 (fr) 1996-12-24 1997-12-12 Ameliorations relatives a la fabrication de brosses
CA002274044A CA2274044A1 (fr) 1996-12-24 1997-12-12 Ameliorations relatives a la fabrication de brosses

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9626862.8 1996-12-24
GBGB9626862.8A GB9626862D0 (en) 1996-12-24 1996-12-24 Improvements in brush making

Publications (2)

Publication Number Publication Date
WO1998027847A1 WO1998027847A1 (fr) 1998-07-02
WO1998027847A9 true WO1998027847A9 (fr) 1998-11-26

Family

ID=10805013

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/022683 WO1998027847A1 (fr) 1996-12-24 1997-12-12 Ameliorations relatives a la fabrication de brosses

Country Status (7)

Country Link
EP (1) EP0971610A1 (fr)
CN (1) CN1127312C (fr)
CA (1) CA2274044A1 (fr)
CZ (1) CZ293029B6 (fr)
GB (1) GB9626862D0 (fr)
HU (1) HUP0000165A3 (fr)
WO (1) WO1998027847A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2197516T3 (es) 1997-09-26 2004-01-01 GLAXOSMITHKLINE CONSUMER HEALTHCARE GMBH & CO. KG Cepillo de dientes.
DE19816098A1 (de) * 1998-04-09 1999-10-14 Coronet Werke Gmbh Reinigungsbürste, insbesondere Zahnbürste
GB2338648A (en) * 1998-06-25 1999-12-29 Sophia Basi Cleaning device with resilient head mounting
GB0014495D0 (en) * 2000-06-15 2000-08-09 Smithkline Beecham Gmbh & Co Process
WO2006005216A1 (fr) 2004-07-12 2006-01-19 Trisa Holding Ag Procede et dispositif pour produire une brosse a dents en moulage par injection bimatiere ou multimatiere
MX350287B (es) 2012-03-09 2017-09-04 Colgate Palmolive Co Método para fabricar una placa cabezal y fabricar un implemento para el cuidado bucal usando la misma.
CN104552756A (zh) * 2014-12-31 2015-04-29 黎初胜 一种牙刷柄的制造方法
MY197050A (en) * 2016-03-09 2023-05-23 Lion Corp Toothbrush

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4734230A (en) * 1986-07-24 1988-03-29 Ex-Cell-O Corporation Method and appartus for forming composite products
GB8807673D0 (en) * 1988-03-31 1988-05-05 Lingner & Fischer Gmbh Novel article
DE3840136C1 (fr) 1988-11-29 1990-05-17 Blendax Gmbh, 6500 Mainz, De
DE3923495C1 (fr) * 1989-07-15 1991-01-24 M + C Schiffer Gmbh, 5466 Neustadt, De
SK94893A3 (en) 1991-03-27 1994-05-11 Lingner & Fischer Gmbh Toothbrush having a flexibly linked in its head
GB9106511D0 (en) 1991-03-27 1991-05-15 Lingner & Fischer Gmbh Novel article
US5398369A (en) * 1994-07-07 1995-03-21 Chesebrough-Pond's Usa Co., Division Of Conopco, Inc. Toothbrush with pliable pressure pad
GB9414140D0 (en) 1994-07-13 1994-08-31 Procter & Gamble Toothbrush

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