EP2215923A1 - Method for the production of anchorless brushes, more in particular toothbrushes - Google Patents

Method for the production of anchorless brushes, more in particular toothbrushes Download PDF

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Publication number
EP2215923A1
EP2215923A1 EP10000457A EP10000457A EP2215923A1 EP 2215923 A1 EP2215923 A1 EP 2215923A1 EP 10000457 A EP10000457 A EP 10000457A EP 10000457 A EP10000457 A EP 10000457A EP 2215923 A1 EP2215923 A1 EP 2215923A1
Authority
EP
European Patent Office
Prior art keywords
fiber mass
carrier element
fibers
inspection
happens
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.)
Granted
Application number
EP10000457A
Other languages
German (de)
French (fr)
Other versions
EP2215923B1 (en
Inventor
Bart Gerard Boucherie
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.)
GB Boucherie NV
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GB Boucherie NV
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.)
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Publication date
Application filed by GB Boucherie NV filed Critical GB Boucherie NV
Publication of EP2215923A1 publication Critical patent/EP2215923A1/en
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Publication of EP2215923B1 publication Critical patent/EP2215923B1/en
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Anticipated expiration legal-status Critical

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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
    • A46B3/06—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by welding together bristles made of metal wires or plastic materials
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • A46D3/04—Machines for inserting or fixing bristles in bodies
    • A46D3/045—Machines for inserting or fixing bristles in bodies for fixing bristles by fusing or gluing to a body

Definitions

  • the present invention relates to a method for the production of anchorless brushes, more in particular toothbrushes.
  • toothbrushes are made of a handle to which a carrier element is provided with holes throughout in which fibers are introduced that on one side of the carrier element are attached to the carrier element using metallic fixation means referred to as anchors, which are covered afterwards by a cover part.
  • One method for producing such brushes without metallic fixation means consists of making use of a carrier element with openings throughout, in which fibers can be shoved. These fibers are linked to each other on one side of the carrier element by fusing the extremities of the fibers by means of heat.
  • the carrier element with the fibers can be linked in a non detachable fashion with a toothbrush body, or a toothbrush body can be created onto the carrier element, for instance by injection moulding.
  • the toothbrush body will then at least partly cover that side of the carrier element where the fibers are linked to one another.
  • a disadvantage of this known method is that it destroys the products that have been tested and does not assure an even distribution of the force needed to detach the fibers from the toothbrushes that have not been tested.
  • One way of inspecting such a toothbrush after the injection moulding step would be to visually inspect every toothbrush produced to verify that the molten plastic does not protrude on the opposite side of the toothbrush holder.
  • a disadvantage of such a visual inspection method is that it is not only tedious and laborious, but also unreliable since human observation is not always consistent.
  • Another disadvantage of such a visual inspection is that it does not guarantee the quality of the fusion of the fibers since the extremities of the fibers that are fused together are not visible since they are covered by the covering part.
  • the present invention provides a method for the production of anchorless brushes, more in particular toothbrushes, made out of a carrier element provided with holes throughout in which fibers are introduced which are fused together on one side of the carrier element and are at least partly covered by a covering part whereby the method comprises the following steps:
  • Another advantage of this non-destructive inspection is that it enables the inspection of all the fused extremities of the fibers without destroying them.
  • the inspection of the molten fiber mass can happen in a contactless way, or in a way that makes contact with the molten material. It is clear that a contactless inspection protects the inspection instruments against contaminations from the inspected materials, preventing that these instruments need to be cleaned.
  • An advantage of contact making inspection means is that they are generally less complex and less costly.
  • figure 1 represents a first step of the method for producing toothbrushes starting from a carrier element 1 in the form of a plate provided with openings 2 throughout the plate, wherein fibers 3 or fiber bundles have been shoved through the openings 2 in such a way that the fibers protrude from either side of the plate, respectively with a short part 4 and a long part 5.
  • the extremities 6 of the short part are fused together by applying heat to these extremities so that these extremities 6 are fused into a molten fiber mass 7.
  • the molten fiber mass 7 has the shape of one continuous film 8.
  • the molten fiber mass 7 can have the shape of discrete islands 9 as represented in figure 3 , or can have a defined topography 10 as represented in figure 4 .
  • the carrier element 1 can in an alternative embodiment be covered by a covering part 11 that is part of a handle 12 as represented in figure 5 and 6 , where the covering part 11 in the case of figure 5 is a preformed platelet which is fixed on the carrier element 1 and which in the case of figure 6 is a platelet which has been obtained by injection moulding.
  • the fused extremities 6 can be covered by a part of the handle 12 which acts as a covering part 11, whereby the handle 12 can either be of a preformed type as represented in figure 7 , or can be obtained by injection moulding as in figure 8 .
  • a further step of the method is the non-destructive inspection of the molten fiber mass 7, while this mass 7 is still in a molten condition.
  • FIG. 9 One way of executing such a non-destructive inspection is shown in figure 9 .
  • Figures 9 and 10 show a contactless inspection of the molten fiber mass 3 by means of an image recorder 13 which records an image of the molten fiber mass by means of triangulation techniques, whereby a recorder 13 registers a cloud of digital measuring points of the surface of the molten figure mass, and compares them with a reference image in a digital processing unit 15, as illustrated in figure 9 for three-dimensional images 14 and in figure 10 for two-dimensional images 16
  • the carrier element with the fused fibers can be accepted or refused and removed from the production process.
  • Another contactless way is the inspection by means of a camera which records an image of the molten fiber mass and compares it with a reference image in a digital way by a processing unit 15, as illustrated in figure 10 .
  • the image may comprise the colors of molten fiber mass, or may be a heat image which shows the heat distribution in the molten fiber mass, which can be a measure of the quantity of molten fiber mass and of its distribution.
  • the inspection of the molten fiber mass 7 can also happen through contact with the surface, for instance by means of one or more measuring rods 17, which make contact with the surface of the molten fiber mass 7.
  • the position 18 of each measuring rod 10 can then be compared with a reference position in a processing unit 15, as illustrated in figure 12 .
  • the carrier elements with fibers may also be sold as loose parts, with the intention for the end user to mount it onto a handle 12 so as to cover the molten fiber mass 7.

Abstract

Method for the production of anchorless brushes, more in particular toothbrushes, made out of a carrier element (1) provided with holes (2) throughout in which fibers (3) are introduced that on one side of the carrier element (1) are fused together and are at least partly covered by a covering part (11) whereby the method comprises the following steps:
- provide a carrier element (1) with holes throughout;
- introduce fibers (3) into the holes (2) of the carrier element (1) with one extremity protruding through the carrier element (1);
- fuse the protruding extremities (4) of the fibers (3) by applying heat to these extremities until they melt;
- inspect the molten fiber mass (7)in molten condition in a non-destructive way; and,
- cover the fiber mass (7) by a covering part (11).

Description

  • The present invention relates to a method for the production of anchorless brushes, more in particular toothbrushes.
  • It is known that toothbrushes are made of a handle to which a carrier element is provided with holes throughout in which fibers are introduced that on one side of the carrier element are attached to the carrier element using metallic fixation means referred to as anchors, which are covered afterwards by a cover part.
  • In recent years, anchorless toothbrushes made without the use of metallic fixation means for the fibers have gained morepopularity.One method for producing such brushes without metallic fixation means consists of making use of a carrier element with openings throughout, in which fibers can be shoved. These fibers are linked to each other on one side of the carrier element by fusing the extremities of the fibers by means of heat.
  • The carrier element with the fibers can be linked in a non detachable fashion with a toothbrush body, or a toothbrush body can be created onto the carrier element, for instance by injection moulding.
  • The toothbrush body will then at least partly cover that side of the carrier element where the fibers are linked to one another.
  • Production techniques for producing such brushes were already described in the following patents of the present applicant : EP 0.972.464 en EP 0.972.465 .
  • It is important for the quality of the toothbrush that the fibers are attached firmly to the brush, so as to avoid the detachment of fibers during use of the toothbrush.
    Detachment of the fibers during use can lead to swallowing of the fibers by the user, and to further complications.
  • To check whether the fibers are linked correctly to the toothbrush, one can carry out discrete destructive tests by pulling out the fibers throughout the carrier element which holds the fibers and by measuring the force required to do so.
  • A disadvantage of this known method is that it destroys the products that have been tested and does not assure an even distribution of the force needed to detach the fibers from the toothbrushes that have not been tested.
  • If the molten fiber mass is covered by injection moulding, , it is necessary to avoid that the mass of added plastic penetrates through the molten fiber mass and protrudes between the fibers of the brush.
  • This would not only adversely affect a proper anchoring of the fibers to the toothbrush but would also adversely affect the appearance of the brush on the opposite side of the injection moulded cover.
  • One way of inspecting such a toothbrush after the injection moulding step would be to visually inspect every toothbrush produced to verify that the molten plastic does not protrude on the opposite side of the toothbrush holder.
  • A disadvantage of such a visual inspection method is that it is not only tedious and laborious, but also unreliable since human observation is not always consistent.
  • Another disadvantage of such a visual inspection is that it does not guarantee the quality of the fusion of the fibers since the extremities of the fibers that are fused together are not visible since they are covered by the covering part.
  • It is therefore an objective of the invention to give a solution to one or more of the above mentioned disadvantages.Since the fibers are fused to each other by means of heat, and since it was discovered that the shape and the dimensions of the layer of molten fiber material are directly linked to the strength of the link of the fibers, it is possible to check the uniformity of the pulling force required to detach the fibers from the brush by inspecting the shape and dimensions of the layer of molten fiber material.
  • To this end the present invention provides a method for the production of anchorless brushes, more in particular toothbrushes, made out of a carrier element provided with holes throughout in which fibers are introduced which are fused together on one side of the carrier element and are at least partly covered by a covering part whereby the method comprises the following steps:
    • provide a carrier element with holes throughout;
    • introduce fibers into the holes of the carrier element with one extremity protruding through the carrier element;
    • fuse the protruding extremities of the fibers by applying heat to these extremities until they melt;
    • inspect the molten fiber mass in molten condition in a non-destructive way; and,
    • cover the fiber mass by a covering material.
  • It is particularly advantageous to integrate this inspection of the molten fiber mass into the production steps of the toothbrush, since in this way destruction of good brushes and materials is avoided.
  • Another advantage of this non-destructive inspection is that it enables the inspection of all the fused extremities of the fibers without destroying them.
  • The inspection of the molten fiber mass can happen in a contactless way, or in a way that makes contact with the molten material. It is clear that a contactless inspection protects the inspection instruments against contaminations from the inspected materials, preventing that these instruments need to be cleaned.
  • An advantage of contact making inspection means is that they are generally less complex and less costly.
  • With the intention of better showing the characteristics of the method for producing anchorless brushes according to the invention, hereby, as an example without any limitative character, preferred production methods are described, with reference to the accompanying drawings, wherein:
    • figure 1 and 2 schematically represent two successive steps of the method according to the invention;
    • figures 3 and 4 are variants of the step represented in figure 2;
    • figures 5 to 8 represent different types of finished toothbrushes;
    • figure 9 represents a further step of the method of the invention following the step represented in figure 2;
    • figures 10 to 12 represent variants of the step of the method represented in figure 9;
    • figure 12 is figure 11 with comparison of the rod position to a reference position.
  • figure 1 represents a first step of the method for producing toothbrushes starting from a carrier element 1 in the form of a plate provided with openings 2 throughout the plate, wherein fibers 3 or fiber bundles have been shoved through the openings 2 in such a way that the fibers protrude from either side of the plate, respectively with a short part 4 and a long part 5.
  • In a following step represented in figure 2, the extremities 6 of the short part are fused together by applying heat to these extremities so that these extremities 6 are fused into a molten fiber mass 7.
  • In the example shown in figure 2 the molten fiber mass 7 has the shape of one continuous film 8.
  • Alternatively the molten fiber mass 7 can have the shape of discrete islands 9 as represented in figure 3, or can have a defined topography 10 as represented in figure 4.
  • The carrier element 1 can in an alternative embodiment be covered by a covering part 11 that is part of a handle 12 as represented in figure 5 and 6, where the covering part 11 in the case of figure 5 is a preformed platelet which is fixed on the carrier element 1 and which in the case of figure 6 is a platelet which has been obtained by injection moulding.
  • In another alternative embodiment the fused extremities 6 can be covered by a part of the handle 12 which acts as a covering part 11, whereby the handle 12 can either be of a preformed type as represented in figure 7, or can be obtained by injection moulding as in figure 8.
  • Following the steps of the method of the invention as represented in figures 1 and either one of the figures 2 to 4, a further step of the method is the non-destructive inspection of the molten fiber mass 7, while this mass 7 is still in a molten condition.
  • One way of executing such a non-destructive inspection is shown in figure 9.
  • Figures 9 and 10 show a contactless inspection of the molten fiber mass 3 by means of an image recorder 13 which records an image of the molten fiber mass by means of triangulation techniques, whereby a recorder 13 registers a cloud of digital measuring points of the surface of the molten figure mass, and compares them with a reference image in a digital processing unit 15, as illustrated in figure 9 for three-dimensional images 14 and in figure 10 for two-dimensional images 16
  • Depending on the tolerances set, the carrier element with the fused fibers can be accepted or refused and removed from the production process.
  • Another contactless way is the inspection by means of a camera which records an image of the molten fiber mass and compares it with a reference image in a digital way by a processing unit 15, as illustrated in figure 10.
  • The image may comprise the colors of molten fiber mass, or may be a heat image which shows the heat distribution in the molten fiber mass, which can be a measure of the quantity of molten fiber mass and of its distribution.
  • As illustrated in figure 11 the inspection of the molten fiber mass 7 can also happen through contact with the surface, for instance by means of one or more measuring rods 17, which make contact with the surface of the molten fiber mass 7. The position 18 of each measuring rod 10 can then be compared with a reference position in a processing unit 15, as illustrated in figure 12.
  • After the inspection the product is left undamaged, and it can be linked to the covering part, either immediately, or at a later time. The carrier elements with fibers may also be sold as loose parts, with the intention for the end user to mount it onto a handle 12 so as to cover the molten fiber mass 7.

Claims (13)

  1. Method for the production of anchorless brushes, more in particular toothbrushes, made out of a carrier element (1) provided with holes (2) throughout in which fibers (3) are introduced that on one side of the carrier element (1) are fused together and are at least partly covered by a covering part (11) whereby the method comprises the following steps:
    - provide a carrier element (1) with holes throughout;
    - introduce fibers (3) into the holes (2) of the carrier element (1) with one extremity protruding through the carrier element (1);
    - fuse the protruding extremities (4) of the fibers (3) by applying heat to these extremities until they melt;
    - inspect the molten fiber mass (7)in molten condition in a non-destructive way; and,
    - cover the fiber mass (7) by a covering part (11).
  2. Method according to claim 1, characterized in that the non-destructive inspection happens in a contactless way.
  3. Method according to claim 1, characterized in that the non-destructive inspection happens in a contact making way.
  4. Method according to claim 1, characterized in that the inspection happens according to the colors of the molten fiber mass (7).
  5. Method according to claim 1, characterized in that the inspection happens according to the shape of the molten fiber mass (7).
  6. Method according to claim 1, characterized in that the inspection happens according to the temperature of the molten fiber mass (7).
  7. Method according to claim 1, characterized in that the inspection happens according to the dimensions of the molten fiber mass (7).
  8. Method according to any of the preceding conclusions, characterized in that the inspection happens according to any combination of claims 2 to 7 included.
  9. Method according to any of the preceding conclusions, characterized in that the inspection happens by means of a measuring system which measures a cloud of measuring points (14) of the surface of the molten fiber mass (7), and compares this with a reference image in a digital way.
  10. Method according to any of the preceding conclusions, characterized in that the inspection happens by means of a measuring system which creates a two dimensional image (16) of the surface of the molten fiber mass (7), and compares this with a reference image in a digital way.
  11. Method according to any of the preceding conclusions, characterized in that the inspection happens by means of a measuring system which operates in an optical way.
  12. Method according to claim 11, characterized in that the inspection happens by means of at least one measuring rod which makes contact with the surface of the molten fiber mass, and the position (18) of which is compared with a reference position.
  13. Method according to claim 12, characterized in that the evaluation of the position (18) of the measuring rod happens in a digital way.
EP20100000457 2009-02-04 2010-01-19 Method for the production of anchorless brushes, in particular toothbrushes Active EP2215923B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2009/0059A BE1018439A3 (en) 2009-02-04 2009-02-04 METHOD FOR PRODUCING ANCHORLESS BRUSHES, MORE CERTAIN TOOTHBRUSHES.

Publications (2)

Publication Number Publication Date
EP2215923A1 true EP2215923A1 (en) 2010-08-11
EP2215923B1 EP2215923B1 (en) 2014-05-21

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EP20100000457 Active EP2215923B1 (en) 2009-02-04 2010-01-19 Method for the production of anchorless brushes, in particular toothbrushes

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EP (1) EP2215923B1 (en)
BE (1) BE1018439A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016008576A1 (en) * 2014-07-15 2016-01-21 Zahoransky Ag Carrier plate and brush, in particular toothbrush with carrier plate

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4635313A (en) * 1983-11-16 1987-01-13 North American Philips Corporation Brush with self retaining bristles
EP0405204A2 (en) * 1989-06-24 1991-01-02 Frisetta GmbH Method and apparatus for forming zones or tufts of bristles
DE4302870A1 (en) * 1993-02-02 1994-08-04 Zahoransky Anton Fa Method of making brushes and brush making machine
DE19738256A1 (en) * 1997-09-02 1999-03-11 Rueb F A Holding Gmbh Method and device for producing bristle fields and bristle field produced therewith
EP0972464A1 (en) 1998-07-14 2000-01-19 Firma G.B. BOUCHERIE, naamloze vennootschap Method for manufacturing brushes and brush manufacturing machine applying this method
EP1136016A1 (en) * 2000-03-21 2001-09-26 G.B. Boucherie, N.V. Method and device for melting ends of bristles
WO2003017801A1 (en) * 2001-08-24 2003-03-06 Kao Corporation Toothbrush manufacturing method
US20040117934A1 (en) * 2002-12-19 2004-06-24 Trisa Holding Ag Toothbrush and process for producing the same
EP2078472A1 (en) * 2008-01-10 2009-07-15 G.B. Boucherie, N.V. Stamp for pressing bundles of fibres

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4635313A (en) * 1983-11-16 1987-01-13 North American Philips Corporation Brush with self retaining bristles
EP0405204A2 (en) * 1989-06-24 1991-01-02 Frisetta GmbH Method and apparatus for forming zones or tufts of bristles
DE4302870A1 (en) * 1993-02-02 1994-08-04 Zahoransky Anton Fa Method of making brushes and brush making machine
DE19738256A1 (en) * 1997-09-02 1999-03-11 Rueb F A Holding Gmbh Method and device for producing bristle fields and bristle field produced therewith
EP0972464A1 (en) 1998-07-14 2000-01-19 Firma G.B. BOUCHERIE, naamloze vennootschap Method for manufacturing brushes and brush manufacturing machine applying this method
EP0972465A1 (en) 1998-07-14 2000-01-19 Firma G.B. BOUCHERIE, naamloze vennootschap Method for manufacturing brushes and brush manufacturing machine applying this method
EP1136016A1 (en) * 2000-03-21 2001-09-26 G.B. Boucherie, N.V. Method and device for melting ends of bristles
WO2003017801A1 (en) * 2001-08-24 2003-03-06 Kao Corporation Toothbrush manufacturing method
US20040117934A1 (en) * 2002-12-19 2004-06-24 Trisa Holding Ag Toothbrush and process for producing the same
EP2078472A1 (en) * 2008-01-10 2009-07-15 G.B. Boucherie, N.V. Stamp for pressing bundles of fibres

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016008576A1 (en) * 2014-07-15 2016-01-21 Zahoransky Ag Carrier plate and brush, in particular toothbrush with carrier plate
CN106455806A (en) * 2014-07-15 2017-02-22 沙郎斯基股份公司 Carrier plate and brush, in particular toothbrush with carrier plate
CN106455806B (en) * 2014-07-15 2019-01-01 沙郎斯基股份公司 Support plate and brush, the toothbrush especially with support plate
EP3169191B1 (en) * 2014-07-15 2023-05-03 Zahoransky AG Method of attaching bristle bundles consisting of bristle filaments to a carrier plate

Also Published As

Publication number Publication date
EP2215923B1 (en) 2014-05-21
BE1018439A3 (en) 2010-11-09

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