EP3932254A1 - Verfahren zur herstellung einer bürste und bürste - Google Patents

Verfahren zur herstellung einer bürste und bürste Download PDF

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Publication number
EP3932254A1
EP3932254A1 EP21157881.0A EP21157881A EP3932254A1 EP 3932254 A1 EP3932254 A1 EP 3932254A1 EP 21157881 A EP21157881 A EP 21157881A EP 3932254 A1 EP3932254 A1 EP 3932254A1
Authority
EP
European Patent Office
Prior art keywords
bundle
bristle
brush
bundles
bristles
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.)
Pending
Application number
EP21157881.0A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ingo Kumpf
Marc König
Florian Kiefer
Gerhard Steinebrunner
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.)
Zahoransky AG
Original Assignee
Zahoransky AG
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 Zahoransky AG filed Critical Zahoransky AG
Publication of EP3932254A1 publication Critical patent/EP3932254A1/de
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/04—Preparing bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B7/00—Bristle carriers arranged in the brush body
    • A46B7/04—Bristle carriers arranged in the brush body interchangeably removable bristle carriers
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/025—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups the bristles or the tufts being arranged in an angled position relative to each other
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/028—Bristle profile, the end of the bristle defining a surface other than a single plane or deviating from a simple geometric form, e.g. cylinder, sphere or cone
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/06—Arrangement of mixed bristles or tufts of bristles, e.g. wire, fibre, rubber
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/08—Supports or guides for bristles
    • A46B9/10—Adjustable supports
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0238—Bristles with non-round cross-section
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0253—Bristles having a shape which is not a straight line, e.g. curved, "S", hook, loop
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/08—Preparing uniform tufts of bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures

Definitions

  • the invention relates to a method for producing a brush, in particular a toothbrush.
  • the invention also relates to a brush, in particular a toothbrush.
  • Brushes and, above all, toothbrushes are available in a wide variety of designs. Despite the existing diversity, there is still a great need for further embodiments of brushes with shapes and / or properties that are often difficult to implement. The challenge here is to manufacture such brushes economically.
  • the object of the invention is therefore to provide a method and a brush of the type mentioned at the outset which meet this requirement in the most economical way possible.
  • the invention proposes that at least one bristle bundle of the brush, starting from an undeformed initial shape, is permanently reshaped in such a way that at least one bristle filament of the bristle bundle has a curved and / or kinked course after the deformation.
  • the design of the bristles is essential for the function and properties of the brush.
  • the targeted deformation of at least one bristle bundle allows certain properties of the brush, for example its Targeted influence on durability or its cleaning effect.
  • the at least one bristle bundle after its attachment to a bristle carrier for example on a brush head, which, starting from its undeformed initial shape, is permanently reshaped in such a way that at least one bristle filament of the bristle bundle after deformation becomes a curved and / or has a kinked course.
  • the bristle bundles can be attached in a conventional manner.
  • the individualized shaping of the brush can be done in a separate processing step. This can simplify the manufacture of even complex brushes.
  • deforming the bristle bundle By deforming the bristle bundle, its properties can be changed in a targeted manner. By deforming a bundle of bristles, it is possible, for example, to change the cleaning effect of the brush in a targeted manner.
  • the deformation of the at least one bundle of bristles can, for example, strengthen the bundle or soften the bundle. A deformation of the bristle bundle that strengthens the bundle can lead to an increase in the abrasiveness of the bristle bundle.
  • the reshaped bristle bundle can be stiffer compared to its undeformed original shape and thus have a stronger cleaning effect.
  • the targeted deformation of the bristle bundle also makes it possible to increase the cleaning accuracy of the bristle bundle.
  • the targeted deformation makes it possible, for example, for individual bristle filaments to protrude from a free end of the bristle bundle.
  • These bristle filaments can be particularly suitable, for example, for cleaning interdental spaces and / or for cleaning so-called tooth fissures.
  • At least one bundle of bristles starting from an undeformed initial shape, is permanently reshaped in such a way that the bundle of bristles has a rotationally asymmetrical cross section at its free end of the bundle.
  • At least two bundles of bristles are combined in a common bundle section, for example in a common bundle end section. In this way it is possible to produce a common bristle bundle which is larger at the end from two smaller bristle bundles.
  • Another embodiment of the method provides for at least one bristle bundle to be divided at its free end into at least two bristle bundles which are separate from one another and which can also be referred to as bundle end sections. In this way it is possible to produce at least two or more smaller bundles of bristles from a bundle of bristles.
  • bristle filaments of at least one bristle bundle are displaced in order to create a recess in the bristle bundle. This can be done, for example, with the aid of a displacement means. Due to the recess produced in the bristle bundle, the bristle bundle can be more flexible. It is also possible to use the recess in the bristle bundle for receiving an active ingredient and / or a cleaning agent, for example toothpaste.
  • the recess can be arranged between a first closed bundle section, in particular adjoining a free end of the bristle bundle, and a second closed bundle section, in particular adjoining an end of the bristle bundle on the bristle carrier side.
  • the recess can also be produced with a closed cross section defined by the bristle filaments of the bristle bundle in the at least one bristle bundle.
  • the bristle bundles can be stuffed into the bristle field or the bristle facing of the brush or attached without anchors.
  • At least one bristle bundle can also be given a helical, conical, frustoconical or cup-shaped shape. It is also possible to spread a bundle of bristles during deformation. In this way, the bristle bundle can be given a fan shape.
  • One embodiment of the method provides for at least two, preferably helical, bristle bundles to be twisted with one another so that they wrap around one another.
  • the bristle bundles can be twisted with one another at a distance from one another or in a mutually contacting manner.
  • the at least one bristle bundle under the action of heat and / or with the aid of of a shaping tool, for example a shaping bundle pocket, starting from the original shape into a desired target shape.
  • a shaping tool for example a shaping bundle pocket
  • a molecular structure of the bristle filaments of the bristle bundle can adapt to a shape in which the bristle filaments are kept deformed, for example with the aforementioned bundle pocket.
  • the heat can relieve stresses that are present in the individual bristle filaments due to the deformed holding and that would actually restore the bristle filaments to their original shape.
  • the reduction of these tensions has the consequence that the bristle bundle permanently retains its reshaped shape after cooling.
  • One embodiment of the method provides for at least one bristle bundle to be placed against the other bristle bundle to support another bristle bundle.
  • a bristle bundle supported in this way has increased stability and thus an increased cleaning effect when penetrating into interdental spaces and / or tooth fissures between tooth and gum.
  • One embodiment of the method provides for at least two bristle bundles to be placed against the third bristle bundle in order to support a third bristle bundle, which can be arranged between the two bristle bundles.
  • the third bundle of bristles is given increased stability by the contact with the second or, if appropriate, several bundles of bristles.
  • At least one bundle of bristles has a cross section, in particular at its free bundle end, with an angular and / or angular internal geometry as a result of the deformation described above and / or with an angular and / or angular outer geometry.
  • Angular and / or angular inner and / or outer geometries can increase the abrasiveness of the correspondingly shaped bundles of bristles. In this way, the bristle bundles reshaped in this way are suitable for a correspondingly intensive cleaning.
  • one embodiment of the method provides that the at least one bundle of bristles is given a cross section, in particular at its free bundle end, with a round or circular inner geometry and / or with a round or circular outer geometry.
  • a brush in particular a toothbrush, of the type mentioned at the outset is also proposed, which has the features of the independent claim directed to such a brush.
  • a brush is thus proposed which has at least one bristle bundle with at least one bristle filament with a curved and / or kinked course.
  • At least one bundle of bristles of the brush can have a rotationally asymmetrical cross section at its free end of the bundle
  • Such brushes can be produced by the method according to one of the claims directed to the method.
  • the brush it is provided that at least two bundles of bristles are combined in a common bundle section.
  • the common bundle section can in particular be a common bundle end section at the free end of the bristle bundles that are united with one another.
  • At least one bundle of bristles is divided at its free bundle end into at least two bundle end sections that are separate from one another.
  • a bristle bundle has a recess.
  • the recess can be produced by displacement and / or deformation of bristle filaments of the bristle bundle.
  • a bundle of bristles in one embodiment, provision is made for a bundle of bristles to have two bundle cross-sections which are axially spaced from one another in relation to its longitudinal axis and which differ from one another in terms of shape and / or size.
  • a bundle of bristles prefferably has a helical, conical, frustoconical or cup-shaped shape. It is also possible for at least one bristle bundle of the brush to be spread apart and thus fan-shaped.
  • At least two, preferably each helical, bristle bundles are twisted with one another so that they wrap around one another.
  • the bundles of bristles that are twisted with one another can be twisted with one another at a distance from one another or contact one another and be twisted with one another.
  • At least one bristle bundle comprises crimped and / or corrugated bristle filaments. Furthermore, it can be provided that at least one bristle bundle bristle filaments of different thicknesses and / or bristle filaments made of different, in particular materials of different stiffness. Furthermore, it can be provided that at least one bristle bundle comprises bristle filaments with a grain additive and / or with an antibacterial additive.
  • the cleaning effect of the bristle bundle can be adjusted accordingly by adding grain.
  • An antibacterial additive in the bristle filaments of the bristle bundle can avoid or at least reduce the formation of a biofilm on the bristle filaments.
  • At least one bundle of bristles can have an outwardly or inwardly curved front contour at its free end of the bundle. It is also possible for at least one bundle of bristles to be fanned out at its free end of the bundle.
  • At least one bristle bundle can be placed against the other bristle bundle to support another bristle bundle.
  • One of the bristle bundles for supporting the other bristle bundle is preferably placed with its free bundle end against the other bristle bundle.
  • Another embodiment of the brush provides that at least two bristle bundles are placed against the third bristle bundle to support a third bristle bundle, in particular located between the two bristle bundles.
  • the at least two bristle bundles for supporting the third bristle bundle can be placed with their free bundle ends against the third bristle bundle.
  • the brush has at least one bundle of bristles with a cross section, in particular at its free end of the bundle, with an angular and / or angular inner geometry and / or with an angular and / or angular outer geometry, at least this one bundle of bristles can have a higher abrasiveness and thus a more intensive cleaning effect .
  • At least one bristle bundle has a cross section, in particular at its free bundle end, with a round or circular inner geometry and / or with a round or circular outer geometry. Due to the round or circular inner geometry and / or the round or circular outer geometry, this bristle bundle can have a lower abrasiveness and thus promote comparatively gentle cleaning.
  • the properties of the bristle bundles can also be influenced by the use of tapered or sharpened bristle filaments and / or of triangular, round, square, X-shaped, diamond-shaped and / or cruciform bristle filaments in cross section.
  • the bristle filaments can consist, for example, of the materials PA6.12, PA6.10, PA10.10, PA11, PA4.10, PBT, PP or also of mixtures of the materials mentioned (e.g. PA6.12 with PBT sheathing).
  • the bristle filaments can, for example, have filament thicknesses of 2-15 mils and / or rounded at the ends or they can also be raw.
  • a device described below for shaping bristle bundles of a bristle facing or bristle field of a brush comprises at least one bundle pocket with at least one, preferably at least two, bundle receptacles formed therein and a heating device. With the heating device, bundles of bristles introduced into the at least one bundle receptacle can be heated.
  • the at least one bundle receptacle is bundle-forming and is set up to have bundles of bristles introduced into the bundle receptacle in comparison to their shape before the introduction into the bundle receptacles under the action of heat given off by the heating device in order to fix the shape of the bristle bundle introduced into the bundle receptacle, which is predetermined by the bundle receptacle.
  • bundle receptacles can be combined in at least one group, a group comprising a number of bundle receptacles corresponding to a number of bristle bundles of a bristle facing or bristle field whose bristle bundles are to be reshaped with the device. In this way, all the bristle bundles of the bristle field of a brush can be reshaped in one work step with the device for individualizing the brush.
  • the bundle receptacles are expediently arranged within a group in the same way as the bristle bundles in the bristle facing of the brush to be processed.
  • At least one bundle receptacle of the bundle pocket of the device can have at least two cross-sections which are axially spaced apart in relation to a longitudinal axis of the bundle receptacles and which differ from one another in terms of shape and / or size. In this way, a device is created that allows a diverse individualization of brushes.
  • a bundle receptacle of the bundle pocket has an insertion channel which opens into at least two channels of the bundle receptacles downstream of the insertion channel.
  • bundles of bristles can be formed which spread apart in their course.
  • the downstream channels of the bundle receptacles can have longitudinal axes that are at a defined angle to one another, in particular at an acute angle Angles are aligned.
  • a bundle of bristles can be formed which has a Y-shape.
  • At least one bundle receptacle of the bundle pocket has a bundle receptacle section which is defined by the lateral surfaces of two cones or truncated cones.
  • the longitudinal center axes of the cones or truncated cones can be congruent.
  • the cones or truncated cones can have different radii.
  • At least one bundle receptacle of the bundle pocket can fan out or spread open, in particular starting from a cross section of the bundle receptacles, preferably cup-shaped and / or conical.
  • the bundle pocket of the device can have at least two bundle receptacles which open into a common bundle receptacle section.
  • the bundle pocket can also have at least one bundle receptacle which is designed to receive at least two bristle bundles and / or which comprises a common bundle receptacle section for at least two bristle bundles.
  • the at least one bundle pocket can have at least one heat exchange element that enables heat exchange favored.
  • the bundle pocket can be brought to the temperature required for the reshaping or deformation of the bristle bundle more quickly by the heating device.
  • the at least one heat exchange element of the bundle pocket can accelerate the cooling of the bundle pocket and a bundle of bristles located therein.
  • a cooling and / or heating rib and / or a cooling and / or heating fin can serve as the heat exchange element.
  • the bundle pocket can have a surface structure that promotes heat exchange.
  • a surface structure that promotes heat exchange.
  • the device can have at least one bundle gripper and / or at least one bundle pocket gripper.
  • both the at least one bundle gripper and the at least one bundle pocket gripper can be movable between an initial position and a processing position.
  • the at least one bundle pocket gripper and / or the at least one bundle gripper preferably in each case, a vibrator be assigned.
  • the bundle pocket and / or a bundle of bristles held with the bundle gripper can be set in vibration.
  • the bristle filaments of the at least one bristle bundle can slide more easily into the bundle pocket.
  • the at least one bundle pocket can have a wall with a constant and preferably as thin a wall thickness as possible.
  • An inner contour of the bundle pocket can be matched to an outer contour of the bundle pocket.
  • An outer contour of the bundle pocket can match an inner contour of the bundle pocket.
  • the introduction of bundles of bristles into the bundle pocket is made easier if the insertion opening of the at least one bundle pocket is provided with an insertion funnel.
  • the bundle pocket can furthermore form or be a, preferably materially homogeneous, monolithic unit. A particularly high degree of design freedom with regard to the shape of the bundle pouch can be achieved if the bundle pouch is 3-D printed. In this way, the bundle pockets can have particularly complex internal structures.
  • bundle pockets are conceivable which, for example, have a helical inner structure for receiving a bristle bundle and which, due to their shape, impress a helical target shape on a bristle bundle arranged therein for deformation.
  • the at least one The bundle pocket of the device has an outlet opening which is preferably arranged in or on a side of the bundle pocket opposite the insertion opening of the bundle pocket. Free filament ends of a bristle bundle arranged in the bundle pocket can protrude from the bundle pocket from this outlet opening and be accessible for post-processing, for example for milling and / or grinding.
  • the bundle pocket of the device can furthermore be provided with an insertion opening for a bundle of bristles and with at least one lateral opening. At least one bundle of bristles can be inserted into the bundle pocket through the insertion opening of the bundle pocket.
  • a displacement means of the device for profiling a bristle bundle introduced into the bundle pocket and / or creating a recess within the bristle bundle can be introduced into the bundle pocket through the lateral breakout of the bundle pocket.
  • This device is also set up by means of the bundle pocket to convert a bundle of bristles inserted into the bundle pocket, proceeding from an undeformed initial shape, into a desired target shape under the action of heat that is emitted by the heating device onto the bundle pocket and thus also onto the bundle of bristles located therein. to reshape.
  • a device for shaping bristle bundles which allows individualization of bristle bundles and thus ultimately expands the design options for individualizing brushes that are equipped with the shaped bristle bundles.
  • the device according to the invention also offers the possibility of increasing the effectiveness of bristle bundles by impressing a technically effective shape to improve. Depending on the application, it is conceivable to bring the bristle bundles into the most varied of shapes.
  • bristle bundles whose bristle filaments follow a helical line or bristle bundles which have a first cross-sectional shape at one end and a second cross-sectional shape at their second end, while the cross-section of the bristle bundle extends from the first end fluidly changed towards the second end.
  • the shape given by the bundle pocket is impressed on the bristle bundle introduced into the bundle pocket of the device.
  • the as yet undeformed bundle of bristles can, for example, have a cylindrical or slightly conical initial shape before it is introduced into the bundle pocket. If the bundle pocket, in particular a receptacle for the bundle pocket into which the bundle of bristles is inserted, has a shape that deviates from this initial shape, the bundle of bristles forcibly adapts its shape or shape when it is inserted into the bundle pocket to the shape given by the bundle pocket.
  • the shape given by the bundle pocket, which the bristle bundle located in the bundle pocket has assumed, can be fixed.
  • the heat given off by the heating device causes a kind of stress-relief annealing of the bristle bundle held deformed in the bundle pocket.
  • the bristle filaments of the bristle bundle held deformed by and / or in the bundle pocket can change their structure accordingly under the action of heat, whereby the changed shape of the bristle bundle can ultimately be fixed.
  • Displacement means are introduced into the bundle pocket and between bristle filaments of the at least one bristle bundle located in the bundle pocket.
  • the bristle filaments of the bristle bundle are displaced laterally by the displacement means.
  • the bristle bundle located in the bundle pocket can be provided with a recess formed within the bristle bundle.
  • the heat given off by the heating device has the effect that the recess produced by the displacement means within the bristle bundle is retained after the bristle bundle has been removed from the bundle pocket. It can be advantageous here to leave the displacement means in its displacement position within the bundle pocket, while the bundle pocket and the bristle bundle located therein are heated by means of the heating device.
  • the displacement means can be inserted and / or inserted into the bundle pocket transversely or at right angles to an insertion direction of a bristle bundle.
  • the bundle pocket can have two opposing, lateral cutouts.
  • the two outbreaks can be arranged on the bundle pocket in such a way that a receiving space in the bundle pocket, into which the at least one bristle bundle can be inserted, lies between the two outbreaks.
  • the displacement means of the device can be inserted through the one opening through the receiving space of the bundle pocket and emerge from the bundle pocket through the other opening. This ensures that the displacement means completely protrudes through the bundle pocket, in particular its receiving space, and thus the desired one Recess generated within the bristle bundle by displacing the bristle filaments of a bristle bundle located in the bundle pocket.
  • the at least one breakout of the bundle pocket can be so large that it creates a recess in the bristle bundle, which is formed on the one hand by a first closed bundle section that lies between the recess and a free end of the bristle bundle, and on the other hand by a second closed bundle section that lies between the recess and an end of the bristle bundle on the bristle carrier side is limited.
  • the closed bundle section which is arranged adjacent to the free end of the bristle bundle, like the closed bundle section, which is arranged adjacent to the end of the bristle bundle on the bristle carrier side, can, for example, have a length that is 5% of a total length of the bristle bundle, measured in the longitudinal direction of the bristle filaments of the bristle bundle.
  • this can mean that a first closed or breakout-free section of the bundle bag, which is arranged between the breakout and the insertion opening of the bundle bag, and a second closed or breakout-free section of the bundle bag, which is between the breakout and one of the insertion opening of the bundle bag opposite end of the bundle pocket is arranged, each have a length of at least 5% of a total length of the bundle pocket.
  • the at least one cutout of the bundle pocket can have a length, measured between the insertion opening of the bundle pocket and an end of the bundle pocket arranged opposite the insertion opening of the bundle pocket, which is between 10% and 90% or 95%, in particular between 50% and 90% of the total length of the bundle pocket measured in the same direction.
  • the device has at least one closure means.
  • the closure means of the device can be set up to at least temporarily close the at least one lateral opening of the at least one bundle pocket.
  • the closure means can effectively prevent bristle filaments of a bristle bundle introduced into the bundle pocket from being accidentally pushed or getting out of the breakout of the bundle pocket.
  • the device has at least one processing means for processing a bundle of bristles, in particular a milling cutter and / or a grinder.
  • the device can furthermore have a cooling device.
  • the heating device extends over an area which covers a circular ring segment with an angular range between 180 ° and 270 °.
  • a cooling device of the device can extend over an area which covers a circular ring segment with an angular range between 180 ° and 90 °.
  • the heating device has a heating plate, preferably the one extends over an area which covers a circular ring segment with an angular range between 180 ° and 270 °, for example.
  • a cooling device of the device for example the previously mentioned one, can have a cooling plate, preferably which extends over an area that covers a circular ring segment with an angular range, for example between 180 ° and 90 °.
  • This type of heating device and cooling device is particularly suitable for use in a brush manufacturing machine, as will be described in more detail below and which has a rotary indexing table, by means of whose bundle pockets and the bristle bundles located therein can be transported between different stations of the brush manufacturing machine.
  • the device has a bundle spreading device.
  • the bundle spreading device is designed to spread, in particular, adjacent bundles of bristles before being introduced into the bundle pocket, in particular into the bundle receptacles. This can simplify the introduction of the bundle of bristles into the bundle pocket. By spreading the bristle bundles, a distance between two adjacent bundles can be increased.
  • the device can also have a moistening device for moistening and / or steaming the bundles of bristles.
  • a moistening device for moistening and / or steaming the bristle bundles.
  • bristle filaments that make up the bristle bundles can be held together.
  • the bristle bundles can at least temporarily assume a more compact shape. This favors the introduction of the bristle bundles into the bundle pocket, in particular into the bundle receptacles of the bundle pocket.
  • the device can have a control unit which is set up to control the heating device in such a way that the bundles of bristles in the bundle pocket are heated according to defined heat profile curves.
  • the heating device and / or the bundle pocket, here in particular the bundle receptacles, can be designed to heat the bristle bundles by conduction by means of mechanical contact, by induction and / or convection, preferably by means of a temperature-controlled fluid, and / or by means of thermal radiation.
  • a cooling device of the device can be set up to cool the bristle bundles by means of a temperature-controlled fluid, in particular by means of compressed air and / or by means of nitrogen.
  • the cooling device can comprise, for example, a cold air gun, a vortex tube and / or a vortex tube.
  • the bundle pocket can be produced by erosion and / or by 3D printing and / or by milling and / or from thin, subsequently interconnected layers and / or plates.
  • the bundle receptacles of the bundle pocket can have a surface roughness of at most 6.3 ⁇ m. This can facilitate the introduction of the bundle of bristles into the bundle receptacles.
  • the bundle receptacles can also be ground, in particular flow-ground, and / or polished in the direction of insertion of the bristle bundles. This, too, can reduce resistance when inserting the bundle of bristles and promote targeted insertion of the bundle of bristles into the bundle receptacles. It is also possible for the bundle receptacles to have a surface coating in order to reduce their surface roughness.
  • the device can have a suction device with which a negative pressure can be applied to the bundle pocket, in particular to the bundle receptacles. This, too, can facilitate the introduction of the bundle of bristles into the bundle pocket, in particular into the bundle receptacles. The bundle of bristles can be sucked into the bundle receptacles of the bundle pockets due to the vacuum applied.
  • the bundle pocket can be perforated, in particular on the side. This can promote a heat exchange when the bristle bundles are heated and then cooled via the bundle pocket. Furthermore, the bundle pocket can have at least one flow channel. It is thus possible, for example, to feed a heated and / or a cooled fluid for the introduction of heat and / or for cooling the bristle bundle through the bundle pocket.
  • the device can furthermore have a discharge device via which fluid heated by the heating device, in particular warm air, can be discharged into the environment.
  • a discharge device via which fluid heated by the heating device, in particular warm air, can be discharged into the environment.
  • the device, in particular the heating device is to be operated in circulating air mode, it can be advantageous if the device, in particular the heating device, has a closed system, in particular a circulating air system in which the fluid heated by the heating device, in particular heated air, can circulate.
  • a closed system for example a circulating air system, can help to save energy when heating the bundle pocket and the bundles of bristles therein.
  • the device can have a control unit, for example the previously mentioned control unit and / or a regulating unit.
  • the device can have at least one temperature sensor with which a temperature of the bundle pocket can be determined.
  • several temperature sensors are provided with which the temperature of the bundle pocket can be determined at various points. With a plurality of temperature sensors, a more precise temperature distribution can be determined on and / or at least indirectly also in the bundle pocket.
  • a temperature-controlled fluid is to be used to heat the bundle of bristles in the bundle pocket, it can be useful if the device has at least one temperature sensor on the heating device and / or in or on an inflow channel and / or in or on an outflow channel.
  • All of the temperature sensors mentioned above can be used by the control unit and / or the regulating unit of the device to monitor the heat input into the bundle pocket.
  • a cross-sectional area of a bundle receptacle can be at least 20% larger than a total cross-sectional area of individual bristle filaments which are to be introduced into this bundle receptacle.
  • the bundle receptacle is thus oversized in relation to the bristle bundles, as a result of which the bristle bundles can be more easily inserted into the bundle receptacle.
  • at least a part of the heating device is integrated into the bundle pocket of the device. This can promote efficient heating of the bristle bundles located in the bundle pocket.
  • the device can be a guide for a, for example for the aforementioned bundle gripper, a guide for the have at least one displacement means and / or a guide for the at least one previously mentioned closure means of the device.
  • FIGS. 1 and 2 show a brush, designated as a whole by 1, which is designed as a toothbrush.
  • the brush 1 has a bristle field 2 which comprises several bristle bundles 3.
  • the bristle field 2 is formed on a bristle carrier 4, which can be inserted as a brush head in a receptacle 5 on a handle 6 of the brush 1.
  • the bristle field 2 shown shows the bristle bundles 3 before they are deformed and thus in accordance with their unchanged initial shape. What shape such a bristle field 2 can assume after deformation of at least some of the bristle bundles 3 is shown by way of example in FIG Figures 6 to 8 shown.
  • At least one of the bristle bundles 3 of the bristle field 2 is permanently deformed in such a way that at least one bristle filament of the bristle bundle 3 has a curved and / or kinked course after deformation .
  • At least one bristle bundle 3 can have a rotationally asymmetrical cross-section at its free bundle end, like the two outer bristle bundles 3A and 3B of the bristle carrier 4 according to FIGS Figures 1 and 2 show.
  • the bundle of bristles 3 can also obtain the rotationally asymmetrical cross section by deformation.
  • the at least partially still undeformed bristle bundles 3 of the bristle field 2 can basically each of the in the tabular overviews of the Figures 3-5 take on the forms shown.
  • Each of the shapes shown promotes the individualization of brushes and also has a certain technical effect that can, for example, have a positive influence on the usage properties, such as the cleaning effect or cleaning properties, or also the cost-effectiveness of the manufacture of the brushes.
  • a brush 1 can be created in which at least two bristle bundles 3 are combined in a common bundle section.
  • a bundle of bristles 3 is shown in FIGS. B16 and C16, for example Figure 5 shown.
  • a brush 1 which has at least one bundle of bristles 3, which is divided at its free bundle end into at least two bundle end sections which are separate from one another.
  • Such a bristle bundle 3 is shown, for example, in the representations A18 to C18 Figure 5 reproduced.
  • a brush 1 in which at least one bundle of bristles 3 has a recess, as shown, for example, in illustration D18 or also in illustrations A17 to D17 of FIG Figure 5 are shown.
  • the shape according to illustration D18 shows a recess 7 in a bristle bundle 3.
  • the recess 7 was created by displacing and / or deforming bristle filaments of the bristle bundle 3 with the aid of a displacement means, in particular with the aid of a needle-shaped displacement means.
  • bristle bundles 3 shown have two axially spaced apart with respect to a longitudinal axis of the bristle bundle 3 Bundle cross-sections that differ from one another in terms of shape and / or size - for example in Figures A19 to H19 Figure 5 .
  • the representation E18 of the Figure 5 shows a helically wound or coiled bundle of bristles 3.
  • Representation F18 shows three bundles of bristles 3 which are each helically shaped and which are also twisted with one another.
  • Bundles of bristles 3 with crimped and / or corrugated bristle filaments 3 are shown in the representations E16 to J16 of Figure 5 and partly also in the Figures 7 and 8 reproduced.
  • bristle bundles 3 from bristle filaments which have different thicknesses and / or consist of different, in particular differently stiff or elastic materials.
  • bristle filaments which have a grain additive and / or an antibacterial additive can be used for the bristle bundles 3.
  • the representation I18 of the Figure 5 shows two curved bristle bundles 3, which are applied to the third bristle bundle 3 to support a third bristle bundle 3 arranged between the two bristle bundles 3.
  • the two outer bristle bundles 3 contact the third bristle bundle 3 with their free bundle ends.
  • a brush 1 which has at least one bristle bundle 3 with a cross section that has an angular and / or angular inner geometry and / or an angular and / or angular outer geometry
  • the shapes A15 to D15 can be accessed.
  • Other forms of Figures 3-5 have cross-sections that have an angular and / or angular inner geometry and / or an angular and / or angular outer geometry.
  • a brush 1 which has at least one bristle bundle 3, which has a cross section, in particular at its free bundle end, with a round or circular inner geometry and / or with a round or circular outer geometry, the corresponding shapes in lines 8 -13 the tabular overview of forms Figure 4 can be used.
  • the bristle bundle 3 and the bristle filaments of the bristle bundle 3 first to bring it into a target shape, then to keep it in the target shape and at the same time to apply heat.
  • the application of heat can change the molecular structure of the bristle bundles 3, which are held deformed, in accordance with the target shape, so that the bristle bundle 3 remains in the deformed target shape after the bristle bundle 3 has cooled.
  • the bundle pockets can have shaping bundle receptacles which correspond to those in the Figures 3 to 8 Shaped shapes of bristle bundles 3 are formed.
  • the bundle pockets are thus used as molding tools in order to reshape the bundles of bristles 3.
  • the bristle bundles 3 can by changing their geometry obtain advantageous properties that they did not have before their deformation. These properties can be divided into the groups cleaning effect, design / marketing and production properties. These groups can in turn be subdivided as follows:
  • the cleaning effect of the bristle bundles 3 can also be adapted through targeted deformation.
  • the bundle of bristles 3 can, for example, have a tapered end of the bundle.
  • individual bristle filaments that form the tip of the bristle bundle protrude from the other bristle filaments and thus come to places, for example in interdental spaces, in tooth pits or in tooth fissures, which they would not reach without deformation.
  • Supporting bundle positions as in accordance with form I18, can also contribute to a higher rigidity of the supported bristle bundles 3.
  • the abrasiveness of a bristle bundle can also be increased with the help of an angular milling cut, as in the shapes D16, C18 (partly), A20 (partly) and B20 (partly).
  • the cleaning properties of the bristle bundles 3 can be influenced by a targeted combination of the bristle filaments from which the bristle bundles 3 are formed.
  • bristle bundles 3 can be formed from bristle filaments which have different filament geometries and / or different material thicknesses and / or consist of different materials.
  • bristle filaments with grain additives, made of stiffer filament material such as PBT or mixtures of the aforementioned materials and / or with a higher degree of filling (before and / or after deformation) can be formed.
  • the bristle bundles 3 are given a certain spring elasticity by deformation into one of the geometries in the representations E16 to J16, E18, F18, A20 (central part), the helical bristle bundle 3 show.
  • a combination of bristle filaments of different thicknesses, corrugated bristle filaments and / or crimped bristle filaments, or a lower degree of filling in a 3 can increase the sensitivity.
  • the combination of bristle bundle geometries that increase absasiveness and sensitivity increase in a bristle field 2 of a brush 1 can have the advantage of compensating for excessive sensitivity or abrasiveness caused by the shape or nature of the bristle bundles 3.
  • a special feature of bent, reshaped or transformed bundles of bristles 3 is that they can both reduce and increase abrasiveness, depending on the direction in which they are bent and in which direction they are being cleaned. Examples of shapes that reduce abrasiveness in one cleaning direction but increase abrasiveness in another cleaning direction are shown in the illustration G18, H18, F19, G19, H19.
  • structures can be generated in the bristle field 2, for example flags, logos, letters, symbols, color gradients in the bristle bundle 3.
  • a few large bundles of bristles 3 become several small bundles of bristles 3, which can then also be referred to as partial bundles, through deformation and the division that takes place in the process.
  • the bristle bundles 3 can initially be plugged straight, i.e. without inclination, into the holes of a bristle carrier and then bent obliquely to a correspondingly desired inclination.
  • the subsequent deformation can considerably simplify the stuffing process and thus the manufacture of the brush.
  • Bundles of bristles 3 can be shaped into areas by means of a deformation that has taken place after they have been fastened into which they would otherwise not reach.
  • Bundle positions which were previously difficult or even impossible due to the rounding of bristle bundles can now be achieved by subsequent deformation of the bristle bundles 3.
  • a sensitive outer geometry paired with an abrasive inner geometry as in the B15 form can on the one hand protect sensitive gums on the outside and still ensure a satisfactory cleaning effect on the teeth on the inside.
  • the representations A16 to D16 would in the plan view the show the same bundle geometry.
  • This bundle geometry can, however, be implemented in various ways.
  • the bundle geometry from illustration A16 is formed from a bundle 3, while the bundle geometry from illustration B16 is formed from two bundles of bristles 3.
  • the bundle geometry from illustration C16 is formed from four bristle bundles 3.
  • the bundle geometry from illustration D16 was generated by a so-called contour cut. During the contour cut, free bundle ends can be trimmed in the desired manner to produce, for example, an end-face contour on the bristle bundle 3.
  • the representations E16 to J16 also show the same or at least similar bundle geometries that were implemented in different ways.
  • the bristle bundles 3 of the representations F16, G16, H16 and J16 are more sensitive due to the curved or coiled shape of their bristle filaments than the bristle bundles 3 of the representations E16, I16, the bristle filaments of which have a less curved course. Furthermore, it can be seen in the bundle geometry of illustration G16 that the undeformed bristle bundle 3 does not have to be round in its initial shape. Such a bundle of bristles 3 can for example be attached using the anchorless method.
  • the representations A17 to D17 show bundles of bristles 3 with a straight reshaped or with a helically reshaped inner geometry.
  • the representations B6 to F6 and E17 illustrate how bundles of bristles 3 can be configured with more complex logos and / or flags for the targeted individualization of brushes 1.
  • the representations A18 to C18 illustrate the division a bristle bundle 3 into two bristle bundles 3 (A18), the division of two bristle bundles 3 into three bristle bundles 3 (B18) and the division of a bristle bundle 3 into three bristle bundles 3 (C18).
  • Representations D18, G19 and H19 show bundles of bristles 3 which, with the aid of a recess 7, which can also be referred to as a recess, create a reservoir for receiving a cleaning agent, for example toothpaste.
  • the representations E18 and F18 show a coiled or also helical bundle of bristles 3 with a contour cut, so that the bristle filaments of the bundle of bristles 3 in the finished state represent a dome at the tip, that is to say are curved outward.
  • a helical bristle bundle 3 can stand alone or be twisted or intertwined with further helical bristle bundles 3.
  • the representations G18 and H18 show hook-shaped reshaped or transformed bristle bundles 3.
  • the bristle bundle 3 of the representation G18 was stuffed perpendicular to the brush surface and the bristle bundle 3 of the representation H18 at an angle. This is to illustrate that the bristle bundles 3 do not necessarily have to be stuffed vertically for transforming.
  • the illustration A19 shows a bundle of bristles 3 which, for example, fans out upwards with the aid of displacers, in particular needle-shaped displacers, and thus promotes particularly sensitive cleaning.
  • the representations C19 to E19 show bundles of bristles 3 with different funnel shapes.
  • the representations F19 to H19 show that the bristle bundles can also end in a curved manner.
  • In the representations I19 and J19 can be seen. how a straight-cut bundle of bristles 3 is sharpened by reshaping.
  • the bristle filaments become like this through its deformation bent so that the bristle filaments lying on the inside in the bend protrude beyond the bristle bundles 3 lying further outside, so that the bristle bundle 3 has a pointed end face.
  • FIG Figures 6 to 8 show exemplary bristle fields 2 in which bristle bundles 3 are combined, the shapes from the tabular overviews of FIG Figures 3 to 5 exhibit.
  • a brush 1 in particular a toothbrush, which has at least one bristle bundle 3 which comprises at least one bristle filament with a curved and / or kinked course.

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  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Brushes (AREA)
EP21157881.0A 2020-06-29 2021-02-18 Verfahren zur herstellung einer bürste und bürste Pending EP3932254A1 (de)

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Citations (2)

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DE102012010415A1 (de) * 2012-05-25 2013-11-28 Gb Boucherie Nv Verfahren und Vorrichtung zum Herstellen von Bürsten, Borstenträger sowie Bürste
WO2020083848A2 (de) * 2018-10-22 2020-04-30 Zahoransky Ag Vorrichtung und verfahren zum formen von borstenbündeln, bürstenherstellungsmaschine, verwendung einer vorrichtung zum formen von borstenbündeln, bürste, computerprogramm sowie computerlesbares medium

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US4493125A (en) * 1980-08-05 1985-01-15 Collis George C Toothbrush with curved bristles
US6859969B2 (en) * 1999-06-11 2005-03-01 James A. Gavney, Jr. Multi-directional wiping elements and device using the same
US7140058B2 (en) * 2002-09-27 2006-11-28 Colgate-Palmolive Company Toothbrush with kinetic plate
US7137163B2 (en) * 2002-09-27 2006-11-21 Colgate-Palmolive Company Power toothbrush and power source
JP2007244546A (ja) * 2006-03-15 2007-09-27 Toray Monofilament Co Ltd 歯ブラシ用毛材および歯ブラシ
US20100115724A1 (en) * 2008-11-13 2010-05-13 Acumen Co., Ltd. Brush head of a toothbrush
DK2910143T3 (da) * 2014-02-21 2020-03-02 Procter & Gamble Hoved til et mundplejeredskab
WO2017182355A1 (de) * 2016-04-20 2017-10-26 Trisa Holding Ag Bürstenprodukt und verfahren zur herstellung

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Publication number Priority date Publication date Assignee Title
DE102012010415A1 (de) * 2012-05-25 2013-11-28 Gb Boucherie Nv Verfahren und Vorrichtung zum Herstellen von Bürsten, Borstenträger sowie Bürste
WO2020083848A2 (de) * 2018-10-22 2020-04-30 Zahoransky Ag Vorrichtung und verfahren zum formen von borstenbündeln, bürstenherstellungsmaschine, verwendung einer vorrichtung zum formen von borstenbündeln, bürste, computerprogramm sowie computerlesbares medium

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