EP0953304A2 - Bürste - Google Patents

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Publication number
EP0953304A2
EP0953304A2 EP99303326A EP99303326A EP0953304A2 EP 0953304 A2 EP0953304 A2 EP 0953304A2 EP 99303326 A EP99303326 A EP 99303326A EP 99303326 A EP99303326 A EP 99303326A EP 0953304 A2 EP0953304 A2 EP 0953304A2
Authority
EP
European Patent Office
Prior art keywords
staple
brush
holes
bristles
brush according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99303326A
Other languages
English (en)
French (fr)
Other versions
EP0953304A3 (de
Inventor
Philip Michael Morris
Roger David Jacobs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wisdom Toothbrushes Ltd
Original Assignee
Wisdom Toothbrushes Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wisdom Toothbrushes Ltd filed Critical Wisdom Toothbrushes Ltd
Publication of EP0953304A2 publication Critical patent/EP0953304A2/de
Publication of EP0953304A3 publication Critical patent/EP0953304A3/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/16—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by wires or other anchoring means, specially for U-shaped bristle tufts

Definitions

  • This invention relates to brushes and more particularly to means for attaching the bristles of a brush to the brush head.
  • the brush head is formed with a number of circular holes in which the bristles are to be located.
  • the bristles of each tuft of the brush are made in double length and are folded in half so that the fold is inserted in the hole.
  • the bristle tuft is then retained in the hole by means of a flat staple which passes between the halves of the tuft.
  • the staple is positioned diagonally across the hole and forced into the brush head, thus trapping the bristles between the wall and base of the hole and the staple.
  • the staple In order that the staple be retained in the brush head, it has a length longer than the diameter of the hole so that it bites into the material of the brush head on either side of the hole.
  • the length of the staple has to extend well beyond the edges of the hole, particularly in brushes in which, in use, the bristles are highly stressed.
  • the length dimension of the staple dictates, to a large extent, the spacing of the bristle tufts from which it follows that the minimum spacing of the bristle tufts can be adversely affected.
  • the invention seeks to provide a brush in which the above problem is obviated or significantly reduced.
  • the invention provides a brush head comprising a brush head having a plurality of blind holes therein for receiving bristle tufts; a plurality of bristle tufts formed by bundles of bristles folded in two with the folded part located in the holes, and a plurality of staples of a length greater than the width of the holes forced into the brush head diametrically across the holes and above the bristle fold to retain the bristles in the hole, wherein at least one face of the staple has a surface designed to provide increased friction in the face of the staple and the material of the brush head in which it is embedded.
  • the bristle tufts are typically formed from bundles of bristles of double the desired length folded in half with the folded part located in the holes.
  • the two strands of the folded bristle are of the same length.
  • the fold may be situated so that one strand is longer than the other.
  • the staples are typically flat staples having a length greater than the width of the holes.
  • the surface of the staple may be roughened, for example, by sand blasting.
  • the surface could be formed with corrugations, grooves, ribs or projections.
  • the increased friction surface may be provided on one face of the staple, on opposite faces of the staple or on all but the end faces of the staple.
  • a brush comprises a brush head having a plurality of blind holes therein for receiving bristle tufts, a plurality of bristle tufts formed by bundles of bristles of double the desired length folded in half with the folded part located in the holes and a plurality of flat staples of a length greater than the width of the holes and forced into the brush head diamentrally across the holes and above the bristle fold to retain the bristles in the hole wherein at least one face of the staple has a surface designed to provide increased friction between the face of the staple and the material of the brush head in which it is embedded.
  • the head 1 of a toothbrush comprising a base portion 3 of suitable plastics material from which protrude a number of bristle tufts 5 located in holes in the base 3.
  • Figure 2 shows, in sectional view, the region of the brush head 1 in which one of the bristle tufts 5 is located.
  • the bristle tuft is constructed from a bundle of bristles of twice the required length and these are folded in the middle. They are then inserted in a hole 7 in the base portion 3 with the bend 9 at the inner end.
  • a staple 11 is inserted between the bristles 5 diagonally of the hole 7 and pushed downwardly so that it straddles the bend 13 of the bristles. It is then pushed further down so that it is forced into the plastics material on either side of the hole 7 until its upper part 15 is well below the surface of the base portion 3, the friction between the staple 11 and the plastics material of the base 3 holding the staple 11 in place, in which position it traps the bend 13 of the bristles 5 in the hole 7 to prevent their removal therefrom.
  • the present invention seeks to overcome this problem by increasing the friction between the staple 11 and the plastics material.
  • the staple is treated to provide an uneven surface in contact with the plastics material.
  • Figure 3 shows one embodiment of the invention.
  • the staple 11 is roughened on its four main faces 21 and 23, i.e. excluding the end faces 25. The reason why the end faces 25 are unroughened will be discussed hereafter.
  • Figure 4 shows a second embodiment of the invention.
  • one of the two large main faces 21 of the staple 11 is provided with grooves 31 which extend from one face to the other and into which some of the plastics material of the base portion 3 will be pushed during insertion of the staple 11 into the base portion, thus assisting the staple 11 to remain in place and effectively increasing the friction between that face of the staple 11 and the plastics material.
  • any of the surfaces of the staple 11 can be treated so that, for example, in the embodiment of figure 3, only one of the main faces 21 could be treated. In the grooved embodiment of figure 4, both of the main faces 21 could be treated so as to have the grooves 31 on both faces. If desired, the ends 25 of the staple 11 could also be treated though this would make for difficulties in the manufacturing of the staples which are usually produced from a length of flat wire cut to length.
  • FIG. 5 shows very diagrammatically how the treatment of the wire could take place.
  • the untreated wire 41 which is usually supplied on a reel 43 is fed by any usual method to a treatment station 45.
  • This treatment zone may comprise a sand blasting station in which the wire 41 is treated in a sand blast to roughen its surfaces.
  • the end faces 25 of the staple will not be exposed to the sand blast.
  • the exact amount of roughening desired can be imparted to the wire 41.
  • the wire After passage through the treatment station 45, the wire passes to a take up reel 47 which can then be transported to the brush making machinery for use.
  • the sand blasting station would be replaced by a station in which rollers, knurls, crimps or other treatment devices are applied to the wire.
  • Other forms of erosion could be used such as an electrical discharge apparatus for creating spark erosion.
  • etching techniques could be used.
  • the surface configuration of the wire could be effected by the use of suitably shaped extrusion dies.

Landscapes

  • Brushes (AREA)
EP99303326A 1998-04-28 1999-04-28 Bürste Withdrawn EP0953304A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9809079.8A GB9809079D0 (en) 1998-04-28 1998-04-28 Brush
GB9809079 1998-04-28

Publications (2)

Publication Number Publication Date
EP0953304A2 true EP0953304A2 (de) 1999-11-03
EP0953304A3 EP0953304A3 (de) 1999-12-08

Family

ID=10831128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99303326A Withdrawn EP0953304A3 (de) 1998-04-28 1999-04-28 Bürste

Country Status (2)

Country Link
EP (1) EP0953304A3 (de)
GB (2) GB9809079D0 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1015263A3 (fr) 2001-12-21 2004-12-07 Zahoransky Anton Gmbh & Co Procede et dispositif pour la fabrication de brosses.
US8402591B2 (en) 2009-07-01 2013-03-26 Colgate-Palmolive Company Toothbrush having improved tuft retention and anchor wire
CN114222512A (zh) * 2019-08-12 2022-03-22 贝尔肯霍夫有限公司 包括借助于卡钉固定的刷毛簇的刷子和用于制造这种卡钉的线材

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997046136A1 (en) * 1995-06-12 1997-12-11 Anchor Advanced Products, Inc. Brush for improved tuft retention and anchor wire therefor
US5724697A (en) * 1996-08-02 1998-03-10 Colgate-Palmolive Company Toothbrush construction

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1015263A3 (fr) 2001-12-21 2004-12-07 Zahoransky Anton Gmbh & Co Procede et dispositif pour la fabrication de brosses.
US8402591B2 (en) 2009-07-01 2013-03-26 Colgate-Palmolive Company Toothbrush having improved tuft retention and anchor wire
US8726447B2 (en) 2009-07-01 2014-05-20 Colgate-Palmolive Company Toothbrush having improved tuft retention and anchor wire
CN114222512A (zh) * 2019-08-12 2022-03-22 贝尔肯霍夫有限公司 包括借助于卡钉固定的刷毛簇的刷子和用于制造这种卡钉的线材
US12232604B2 (en) 2019-08-12 2025-02-25 Berkenhoff Gmbh Brush having a bristle bunch fastened by means of clamps, and wire for producing such clamps

Also Published As

Publication number Publication date
GB9809079D0 (en) 1998-06-24
GB9909785D0 (en) 1999-06-23
EP0953304A3 (de) 1999-12-08
GB2336769A (en) 1999-11-03

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