BE1025531B1 - Rotated brush, method for producing a screwed brush and apparatus for producing a screwed brush - Google Patents

Abstract

The invention relates to a screwed-in brush (1) having a bristle carrier (2) made of twisted wire sections (3) which have oval and / or elliptical cross-sections at least in the distal section (4) of the bristle carrier (2). Further, a screwed-in brush (1) is proposed, the bristle carrier (2) spaced from its proximal end (11) has a pull-out protection (12). With the help of this pull-out protection (12), the bristle carrier (2) can be securely fixed to the handle (7) of the screwed-in brush (1). In addition, a method for producing a screwed-in brush is proposed, in which wire sections (3), of which at least one is profiled, that is, at least two regions (4a, 6a, 13a) with different cross-sections, to the bristle carrier (2) with each other be twisted. A further subject of the invention is also a brush production machine (20) which has a wire forming device (19) with which a cross section of the wire section (3) to be profiled changes in at least one region (4a, 6a, 13a) of a wire section (3) to be profiled can be, so that the wire section (3) after profiling at least two regions (4a, 6a, 13a) having different cross-sections.

Description

Twisted brush, method for producing a twisted brush and device for producing a twisted brush

The invention relates to screwed-in brushes, in particular mascara brushes or interdental brushes, with a bristle holder comprising at least two wire sections twisted together, a bristle covering being formed on a distal section of the bristle holder.

The invention also relates to a

Procedure for

Making a twisted

Brush with one

Bristle holder twisted from at least two

Wire sections, in particular one of those previously described

Kind, as well as a

Brush making machine for

Manufacture of turned

Brushes, especially those described above

Art.

Twisted brushes are known in various embodiments from the prior art. Among other things, they are used as so-called interdental brushes in the dental field and as so-called mascara brushes in the cosmetic field.

The invention addresses the task of

Improve handling of twisted brushes and simplify the manufacture of such brushes.

To solve the problem, a brush with the means and features of claim 1 is first

BE2018 / 5086 proposed. Accordingly, it is particularly provided that at least one wire section of the at least two wire sections of the screwed-in brush has at least two regions with different cross sections.

The different cross sections can be shaped differently or shaped identically and different sizes. A region of one of the wire sections, which forms a proximal section of the bristle holder, can be provided, for example, with a cross section that is particularly suitable for fastening a handle to the bristle holder. In a region of the at least one wire section, which for example forms a distal section of the bristle carrier, the wire section can have a cross section which has particularly positive properties with regard to the attachment of the bristle trimmings to the bristle carrier and / or to a particularly small passable with the brush Hole diameter leads. A particularly small passable hole diameter is particularly desirable for those screwed-in brushes that are used as interdental brushes and are also to be inserted into small interdental spaces. Oval and / or elliptical cross-sections are particularly suitable for this.

Areas of a wire section which have different cross sections can also be understood to mean infinitesimally small areas of a wire section in the context of the claimed invention.

BE2018 / 5086

In particular, the handling of such a screwed-in brush can thus be simplified. This is particularly the case when it is used as an interdental brush, which is to be inserted into the interdental spaces with its distal portion of its bristle holder.

It can also be advantageous if the at least one of the at least two wire sections already has the at least two regions with different cross sections before the wire sections are twisted to form the bristle carrier. In this way, subsequent and possibly not sufficiently precise deformation of the bristle carrier can be avoided.

To improve the handling of screwed-in brushes of the type mentioned, in particular if they are used as interdental brushes which are to be inserted into the interdental spaces with their distal portion of their bristle holder, a brush with the means and features of claim 2 is also proposed. In particular, a brush is proposed in which the wire sections forming the bristle holder have oval and / or elliptical cross-sections, at least in regions which form the distal section of the bristle holder.

At this point it should be mentioned that the features of independent claims 1 and 2 can be combined with one another in a particularly advantageous manner. For example, a screwed-in brush can be provided with its bristle holder on the one hand

BE2018 / 5086 is optimized with regard to the attachment of a handle to the bristle carrier and on the other hand with regard to the smallest possible passable hole diameter.

The use of

Wire sections with elliptical and / or oval

Cross sections at least in the distal

Section of the

Bristle carrier leads to one

Downsizing one

Outside dimension or one

Outside diameter of

Bristle carrier in its distal section

Compared to conventional

Bristle carriers made, for example

Wire sections with circular

Cross section are made.

of the bristle holder

The minimization of the outer dimension in its distal section leads to a smaller passable hole diameter which is smaller in comparison to conventional brushes

Brush. Thus, the brush according to the invention can be more easily, for example, even in tight spaces with at least comparable stability and durability of the brush

Interdental spaces are introduced. This is for comfortable handling of such a screwed-in

Brush desirable as an interdental brush.

By using wire sections with an oval or elliptical cross-section, individual filaments of the bristle material, which is clamped between the two wire sections when the two wire sections are twisted, can be better placed directly on the outside of the twisted wire sections. This improved installation of the individual bristle filaments on the outside of the

BE2018 / 5086 twisted wire sections can succeed particularly well if the twisted wire sections with their elliptical cross sections are arranged relative to one another and then twisted together such that one of two secondary vertices of the elliptical cross section of a wire section is a secondary vertex of the at least one further wire section with an elliptical cross section is facing.

The use of wire sections which also have oval and / or elliptical cross sections in the proximal section of the bristle holder can facilitate the attachment of a handle to a proximal section of the bristle holder. This is particularly the case when the handle is molded onto the proximal section of the bristle holder.

The aforementioned object is also achieved with a brush, which has the means and features of claim 3. This brush is characterized in particular by the fact that its bristle holder has an anti-pull-out device spaced apart from its proximal end. With the pull-out protection, the bristle holder can be reliably fixed to a handle that can or is arranged on a proximal section of the bristle holder. In this way, the bristle holder can be prevented from unintentionally detaching from the handle during use of the brush. The use of a pull-out safety device arranged in this way is of particular advantage if the handle of the screwed-in brush on the proximal section of the bristle holder

BE2018 / 5086 is injected. The pull-out safety device is at a distance from the proximal end of the bristle holder. The bristle carrier can therefore be made comparatively slim in its proximal section. This makes it possible to provide a slim grip on the proximal section of the bristle holder. In the proximal section of the bristle holder, comparatively little material has to be used for the handle in the brush according to the invention. The pull-out safety device can then be moved into an area which lies between the bristle trim and the proximal section of the bristle holder.

It may be expedient if at least one, preferably all, of the wire sections which are twisted together to produce the respective bristle carrier have at least two regions with differently shaped cross sections. The pull-out safety device can be formed by a change in cross-section of the bristle carrier along its longitudinal extent, which twisted together from the different cross-sections of the at least one wire section

Wire sections result.

It can be advantageous if several or all of them

Wire sections an identical

Profiling, so identical

Areas with different

Have cross sections.

So it is possible, for example

To use wire sections, each round in one area

BE2018 / 5086 have a circular, oval or elliptical cross-section and are provided with a different cross-section in an adjacent area. If two such wire sections with their respective identical cross sections are placed next to one another and then twisted in this way, a bristle carrier is formed which has at least one change in cross section along its longitudinal extent. At this point it should be pointed out that the cross section of the bristle carrier can also be understood to mean the cross section of an imaginary envelope of the bristle carrier.

The bristle carrier can be between its distal

Section and its proximal

Section one

Have middle section.

Between the

Middle section and the proximal

Section, a proximal shoulder can be designed as a pull-out safety device. The handle of the screwed in can be positioned over this proximal shoulder

Breasts form-fitting with the

Bristle holder can be connected and connected in the position of use.

This is particularly the case if the

Bristle holder in its proximal section

Making one

Handle with

Injection molded material is encapsulated.

In this context, it can be advantageous if the bristle carrier in its central section for generating the pull-out protection has an outer dimension which is measurable in a spatial direction oriented transversely to the longitudinal extent of the bristle carrier and which is smaller than one measured in the same spatial direction

BE2018 / 5086

Outside dimension of the bristle carrier is in its adjacent proximal section. With such

Dimensions of the bristle carrier in its proximal section and in its adjacent central section can be used to provide a particularly reliable positive locking of a handle on the proximal section of the pull-out protection provided in this way

Bristle carrier can be reached.

Furthermore, it is possible for the bristle carrier to have a distal shoulder between the middle section and the distal section. To produce such a distal shoulder between the middle section and the distal section, an outer dimension of the bristle holder in its central section that is measurable in a spatial direction oriented to the longitudinal extent of the bristle holder can be smaller or larger than an outer dimension of the bristle holder in its distal section measured in the same spatial direction. The distal shoulder can be used, for example, as a positioning aid for engaging an injection mold in order to inject a handle onto the proximal section of the bristle holder.

The wire sections can at least partially have circular or elliptical or oval or also semicircular cross sections in their regions which form the proximal section of the bristle carrier. In particular for injection molding a handle onto a mascara brush, the use of wire sections with the proximal section of the

BE2018 / 5086

Bristle-forming areas, the semicircular

Have cross sections, be advantageous. To this

In this way, the at least two wire sections can be placed against one another with their, preferably non-curved, flat sides and twisted such that a free area or free area corresponds to a difference area between the cross-sectional area of an imaginary one

Envelopes, both of which are put together like this

Wire sections surrounds, and the sum of

Cross-sectional areas of the juxtaposed

Wire sections corresponds to be particularly small.

Also the middle section of the bristle carrier becomes

Generation of a handle on the proximal section of the

Injected molding material around the bristle carrier, it can be advantageous if areas of the

Wire sections that the middle section of the

Form bristle carrier, have semicircular cross sections. In this way the minimization of the previously defined free

Area also in

Middle section of the

Generate bristle carrier. It should be noted that this is the two to the

Twist the middle section together

Wire sections with their, preferably non-curved,

Flat sides of their semicircular

Cross section facing each other in order to achieve the desired minimization of the free area.

It can be particularly advantageous if the

Wire sections in the proximal section of the

Bristle holder circular or elliptical or oval

Have cross sections, while the wire sections in

BE2018 / 5086

The central section of the bristle carrier has the semicircular cross sections described above. So you can get a particularly sharp one

Generate geometry transition in the form of a shoulder between the central section and the proximal section of the bristle holder, which enables reliable protection against pulling out of the bristle holder from the subsequently attached or molded handle of the screwed-in brush.

In order to minimize the passable hole diameter of the brush, that is to say the dimension through which the brush according to the invention can just be carried out with its distal section, areas, in particular distal areas, of the wire sections which form the distal section of the bristle holder can be oval and / or or have elliptical cross sections. It should be pointed out that the wire sections twisted together in the distal section of the bristle carrier can each face one another with one of their secondary apices of their elliptical cross section. In this way, an outer diameter or an outer dimension of the bristle carrier can be kept particularly small in its distal section and the minimally passable hole diameter of the screwed-in brush can be minimized.

The previously mentioned brush can be on the, in particular around this

Handle of the screwed-in bristle holder attached to be injected so that it at least partially surrounds the proximal section and the pull-out protection. Particularly advantageous

It can be BE2018 / 5086 if the handle is fastened to the bristle holder, in particular injection molded around it, in such a way that it at least partially surrounds the proximal shoulder and also at least part of the central section of the bristle holder.

In principle, the use of at least two separate wire sections for producing the bristle carrier is conceivable. In particular, when using the brush according to the invention as an interdental brush, it can be advantageous if the wire sections are two interconnected legs of a piece of wire bent along a bending line. The bending line can preferably be formed on a distal end of the bristle carrier. In this way, sharp edges, which may represent a risk of injury when using the brush as an interdental brush, can be avoided at the distal end of the bristle holder.

It is also possible that the bending line described above is arranged in the middle of the wire piece. In this context, it should be pointed out that the individual regions with different cross sections, if such are provided, can then be introduced into the wire section in the wire sections, preferably with mirror symmetry to the bending line.

Furthermore, it can be provided that the at least two wire sections are twisted together over a partial area of their respective lengths. This with

BE2018 / 5086 the goal of attaching the bristle trim to the bristle holder. However, it is also possible for the at least two wire sections which form the bristle carrier of the brush to be twisted together over their entire length. This can simplify the attachment of a handle to the bristle holder.

At least two or more or all of the wire sections of the brush can have identical profiles or different profiles, as has already been described above. In this way, screwed-in brushes with differently designed bristle carriers can be provided in a particularly simple manner by combining different or also identically designed wire sections.

In one embodiment of the screwed-in brush it can further be provided that at least one wire section of the at least two wire sections tapers in the direction of its distal end. In this way, at least the distal end of the bristle carrier can have the smallest possible dimension, as a result of which the hole diameter that can be passed with the screwed-in brush can be minimized. This is particularly advantageous in order to create a screwed-in brush that acts as an interdental brush for particularly tight

Interdental spaces is suitable. It can in particular be provided that the at least one tapering

Wire section is conical, frustoconical, pyramid-shaped or truncated pyramid-shaped.

BE2018 / 5086

In particular in the case of such a brush, which has at least one wire section tapering, preferably towards its distal end, the different cross sections of the at least two regions of the wire section can have the same cross-sectional shape, but different cross-sectional areas. This is the case, for example, with those brushes in which at least one of the wire sections of the bristle carrier is conical, frustoconical, pyramid-shaped or truncated pyramid-shaped.

Especially in the case of a wire section which has a shape tapering in the course of its longitudinal axis, the areas with different cross sections can be infinitesimally small areas.

Furthermore, with the brush, in particular one which has at least the features of claim 1, it can be provided that the wire sections deviate from an oval or elliptical cross-sectional shape or no oval and / or at least in regions which form the distal section of the bristle carrier. or have elliptical cross sections. The wire sections can thus have, for example, circular or square or rectangular cross sections in these areas.

The production, in particular, of turned-in brushes can be made simple by a method with the means and features of the independent method claim. In particular

BE2018 / 5086 proposes a method for producing a screwed-in brush with a bristle holder from twisted wire sections, in which at least two wire sections are twisted together to form a bristle holder, at least one of which is a profiled wire section which has at least two regions with differently shaped cross sections , It can also be provided that several or all of the wire sections to be twisted are profiled in this way.

The at least one of the wire sections can be delivered profiled and twisted or else profiled in such a way that the wire section has at least two areas with differently shaped cross sections after it has been profiled.

Preferably, however, several or even all wire sections are profiled in such a way that after they have been profiled they each have at least two regions with differently shaped cross sections. The profiles that each of the wire sections receives can preferably be identical.

After profiling it is possible, for example,

Bristle material between the profiled

To lay wire sections and the

Wire sections for

Manufacturing the

To twist the bristle carrier together.

It can be advantageous if the same cross-sections have the same or

BE2018 / 5086

Correspondingly profiled wire sections are twisted together.

Here, em

Bristle carriers arise, which correspond to the

Cross sections of each

Areas of

Wire sections a proximal

Section with a

Cross section of a first shape, has a central section with a cross section of another shape and / or a distal section with another shape. In each of the sections of the bristle carrier, the wire sections can each have identical cross sections.

In an advantageous embodiment of the method according to the invention, it is provided that the wire sections are connected to one another in a piece of wire, that the wire piece is bent along a bending line after the wire sections have been profiled, in order to convert the wire sections into those required for mutual twisting

To bring relative position to each other. So there is one on both sides of the bending line

Wire section is arranged. Did they on the

Bending line continues to be connected

Wire sections reached this position, they can be twisted together to form the bristle holder.

The wire sections can be profiled by means of a wire shaping device and / or a wire alignment device.

Depending on the application, the wire sections, preferably on both sides, in particular the one above

BE2018 / 5086 mentioned, bending line, by means of a

Wire forming device and / or one

Wire alignment device are provided in each area with a circular cross section and / or in each area with an oval and / or in each area with an elliptical cross section and / or in each area with a semicircular cross section.

The wire sections can be pulled off a supply roll before they are profiled. It can be advantageous to straighten the wire sections by means of a wire alignment device, for example the one already mentioned above. In this context, straightening the wire sections can mean that a basic radius of the wire sections is removed, in particular if they are pulled off a wire roll and fed to the wire shaping device.

As a further improvement in the field of the production of twisted brushes, a brush manufacturing machine of the type mentioned at the beginning is also proposed with the means and features of the independent claim directed to such a machine. This brush manufacturing machine is set up for the production of screwed-in brushes, in particular those according to one of claims 1 to 17, and is particularly characterized in that the brush manufacturing machine

Has wire forming device with which in at least one area of a wire section to be profiled a cross section of the wire section to be profiled

BE2018 / 5086 can be changed so that the wire section after profiling has at least two areas with different cross sections.

It can be advantageous if the

Brush making machine one of the

Wire forming device in

Has wire transport direction upstream wire alignment device. This can be several, in particular driven,

Alignment rollers, by which the the

Wire forming device supplied

Wire or a fed

Wire section runs to one

Output radius, which when a

Unwrapped wire may be present to remove and straighten the wire.

It can also be useful if the

Brush making machine one

Has wire cutting device.

This can

Wire forming device in

Wire transport direction may be arranged downstream.

The brush manufacturing machine can expediently be set up to carry out the method according to the invention.

The usual materials, in particular metal, metal alloys and plastics, can be used as the material for the wire sections from which the bristle carrier is made.

Embodiments of the invention are based on the

BE2018 / 5086

Drawing described in more detail below. Some of them show in a highly schematic representation:

Fig. 1 shows a section of a bristle carrier made of two twisted wire sections in perspective

Representation, wherein the wire sections each have a circular cross section, a section of a further bristle carrier made of two twisted together

Wire sections in perspective

Representation, the wire sections each having a semicircular cross section, another perspective representation of a section according to the two

Wire sections each have one, a screwed together this elliptical one

Brush, being twisted

bristle carrier

cross-section

bristle carrier

Fig. 4 to

Fig. 6 schematic end views of the in the

1 to 3 bristle carrier shown

Clarification of the free surfaces resulting from the different cross-sectional geometries of the wire sections,

Fig. 7 is a perspective view of a

BE2018 / 5086

Fig. 8

Fig. 9

Fig. 10

Fig. 11 profiled wire piece according to the invention with two outer sections, in which the wire piece has a circular cross-section, two adjoining, further arranged sections, in which the wire piece each has a semicircular cross section and a central region or a central section in which the The piece of wire has an elliptical cross section, the piece of wire shown in FIG. 7 and bent around a bending line as a bristle carrier blank, the bristle carrier produced from the bristle carrier blank shown in FIG for the sake of clarity, the screwed-in brush according to the invention shown in the following figures is not shown, a partially sectioned side view of a bristle inserted into an injection mold Enträgers with a bristle trim at its distal end, a side view after the injection of

BE2018 / 5086

Injection molding material into the brush shown in FIG. 10,

Fig. 12 a

Front view of the in Fig.

illustrated brush,

FIG. 13 a FIG. perspective view of the in the 11 and 12 shown Brush, FIG. 14 a strongly schematic perspective presentation one Part of one

invention

Brush manufacturing machine,

15 is a perspective view of a bristle carrier blank for one

Bristle holder of a screwed-in brush comprising two interconnected wire sections, each of the two wire sections having a proximal section with a round cross section and an adjoining middle and distal section with a rectangular cross section,

16 is a perspective view of another

Bristle blank for one

Bristle holder of a screwed-in brush comprising two interconnected wire sections, each of the two wire sections having a proximal section

BE2018 / 5086 with a round cross section and an adjoining middle and distal section with a truncated pyramid-shaped shape tapering towards the distal end of the wire section,

Fig. 17 is a perspective view of another

Bristle blank for one

Bristle holder of a screwed-in brush comprising two interconnected wire sections, each of the two wire sections having a truncated pyramid-like shape over the entire length of the wire section,

18 is a perspective view of another

Bristle blank for one

Bristle holder of a screwed-in brush comprising two interconnected wire sections, each of the two wire sections having a frustoconical shape tapering over the entire length of the wire section, and

Fig. 19 is an overview of different

Cross-sectional geometries at

Design of the wire sections and their

Cross sections can be used.

The Fig.

to 13 show a screwed-in brush designated as a whole, as used, for example, as a mascara brush or as

Interdental brush

BE2018 / 5086 is used. This brush 1 has a bristle carrier 2 made of two wire sections 3 twisted together. A bristle stock 5 is formed on a distal section 4 of the bristle holder 2 and a handle 7 is formed on a proximal section 6 of the bristle holder 2.

In the case of the screwed-in brush 1 shown in FIGS. 10 to 13, the handle 7 is injection-molded around the proximal section 6 of the bristle carrier 2. The injection mold 8 shown in FIG. 10, into which the bristle carrier 2 with its proximal section 6 can be inserted, is used for this purpose. Injection molding material can be introduced into the interior of the injection mold 8 via the injection opening 9 and the injection nozzle attached thereto, and the handle 7 can be produced by injection molding around the proximal section 6 of the bristle carrier 2 and connected to it.

In one embodiment of the brush 1 according to the invention, the use of a bristle carrier 2 is provided, as is shown in sections and in a highly schematic manner in FIG. 3. The wire sections 3 each have an elliptical cross section, at least in regions 4a which form the distal section 4 of the bristle carrier 2. By using such wire sections 3, which are elliptically shaped in cross section, a hole diameter that can be passed with the brush 1 and that is to be kept as small as possible, in particular for the use of the brush 1 according to the invention as an interdental brush,

BE2018 / 5086 can be minimized. These areas 4a of

Wire sections 3 can also be referred to as distal regions 4a.

1 and 2 show sections of bristle carriers 2, which are made from wire sections 3 with a circular cross-section (see FIG. 1) and from wire sections 3 with a semicircular cross-section (see FIG. 2).

4 to 6 each show the sections of bristle carriers shown in FIGS

Front view.

In these

Figures are the two wire sections 3 each of one representing an imaginary envelope

Circle surrounded. On the basis of the free area or open area identified by reference numeral 10, which is composed of a

Difference between the area delimited by the envelope and the total cross-sectional area of the two wire sections 3, it becomes clear that when using wire sections 3 with a circular cross-section, the free area 10 is largest. The smallest possible free area 10 is achieved when using wire sections 3 with a semicircular cross section (cf. FIG. 5). Hardly any free area 10 uncovered by the total cross section of the two wire sections 3 can be seen.

For injection molding a handle 7 on the proximal

Section 6 of the bristle carrier 2, it is advantageous to the free surface 10, ie the area of the cross section

BE2018 / 5086 of the envelopes that are not of the cross section of the

Wire sections 3 is covered to keep it as small as possible. For the

Application of brush 1 as

Interdental brush can

use of

Wire sections 3, at least in the distal

Section 4 of the bristle holder 2 oval and / or elliptical

Have cross sections, a good one

Compromise from the smallest possible open space

10, minimized passable

Hole diameter and

Durability of the bristle carrier 2 can be achieved.

The screwed-in brush 1 shown in FIGS. 10 to 13 has a bristle carrier 2 which has a pull-out safety device 12 at a distance from its proximal end 11. This pull-out safety device 12 is in the form of a change in cross-sectional geometry along the longitudinal extent of the bristle carrier 2. With the pull-out protection 12, the bristle carrier 2 can be prevented from being pulled out of the handle 7 arranged by injection molding on the proximal section 6 of the bristle carrier.

The pull-out safety device 12 enables a positive connection between the bristle carrier 2 and the overmolded handle 7.

In the embodiment of the brush 1, as shown in FIGS. 10 to 13, the wire sections 3 each have three regions 4a, 6a and 13a, each with differently shaped cross sections. The pull-out protection 12 is caused by one due to the different cross sections

BE2018 / 5086

Cross-sectional change of the bristle carrier 2 is formed along its longitudinal extent. As a result, the bristle holder 2 has a central section 13 between its distal section 4 and its proximal section 6, which represents a cross-sectional tapering of the bristle holder 2. Between the middle section 13 and the proximal section 6, a proximal shoulder 14 is formed as a pull-out safety device 12. After injection molding onto the proximal section 6 of the bristle holder 2, the handle 7 is positively connected to the bristle holder 2 via this proximal shoulder 14. 10 and 11 in particular show that the bristle carrier 2 in its central section 13 has an outer dimension which is measurable in a spatial direction transverse to the longitudinal extent of the bristle carrier 2 and which is smaller than an outer dimension of the bristle carrier 2 in its adjacent proximal section 6 measured in the same spatial direction is.

The bristle carrier 2 also has a distal shoulder 15 between the middle section 13 and the distal section 4. To produce the distal shoulder 15, an outer dimension of the bristle holder 2 in its central section 13, which is measurable in a spatial direction oriented transversely to the longitudinal extent of the bristle holder 2, is smaller than an outer dimension of the bristle holder 2 in its distal section 4 measured in the same spatial direction. The distal shoulder 15 can be as Serve positioning stop for the injection mold 8 shown in Fig. 10. 10 to 13

In the embodiment of the brush 1 illustrated in BE2018 / 5086, the wire sections 3 each have circular cross sections in their regions 6a, which form the proximal section 6 of the bristle holder 2. These areas 6a can also be referred to as proximal areas 6a of the wire sections 3.

The wire sections 3 of the in the Fig.

The brushes 1 to 13 shown in their areas 13a, which form the central section of the bristle holder 2 and therefore can also be referred to as central areas 13a, each have a semicircular shape

Cross sections on. The two are twisted together

Wire sections 3 in the central section 13 are oriented relative to one another in such a way that they are undulated

Flat sides of their semicircular

Cross-section facing each other. Due to the

Use of in this middle section 13 in

Cross-section semicircular

The wire sections get the

Bristle holder 2 of the invention

Brush in his

Midsection one to the rest

Sections and 6 of the

Bristle carrier 2 relative taper.

The

Transition from the taper in the middle section to the extension in the proximal

Section 6 then forms the previously described

Pull-out protection 12.

As already mentioned above, the wire sections in the distal section 4 of the bristle carrier 2 have elliptical cross sections.

This qualifies the

Brush 1 for use as

Interdental brush, which has a particularly small passable hole diameter

BE2018 / 5086 and so also in comparatively narrow

Interdental spaces can be easily inserted.

The two wire sections 3 twisted together in the distal section 4 of the bristle carrier 2 are oriented such that they face one another with one of their two secondary apices of their elliptical cross section. In the area of the mutually facing apex of the elliptical cross sections, the is then also clamped

Bristle filaments which form bristles and are arranged between the two wire sections 3.

The handle 7 is fastened to the bristle holder 2 in such a way that it encloses the proximal section 6 and the pull-out protection 12 in the form of the proximal shoulder 14 and part of the central section 13 of the bristle holder 2.

7 to 9 and 10 to 13 illustrate, the wire sections 3 are two interconnected legs of a piece of wire 17 bent along a bending line 16. At a distal end 18 of the bristle carrier 2, the wire sections 3 are also connected to one another in the position of use. The bending line 16 of the bristle carrier 2 is then located at the distal end 18 of the bristle carrier 2. In this way, sharp edges and / or transitions, which can represent a risk of injury when using the brush 1 as an interdental brush, are avoided.

BE2018 / 5086

8 illustrates that the bending line 16 is arranged in the middle of the wire piece 17 and the profiling introduced into the wire sections 3 arranged on both sides of the bending line 16 is mirror-symmetrical to the bending line 16.

The brush 1 shown in FIGS. 10 to 13 can be produced by means of the method described below. To produce the screwed-in brush 1, wire sections 3, which here are connected to form a piece of wire 17, as can be seen for example in FIG. 14, are profiled by means of a wire-forming device 19 of a brush-making machine 20 according to the invention in such a way that the piece of wire 17 is initially still on both sides imaginary bending line 16 areas 4a, 6a, 13a with different cross-sectional geometries.

Fig. 7 and

piece of wire

17, the two wire sections 3, each with three, on both sides of its bending line 16

areas

4a,

6a,

13a different

Has cross-sectional geometry.

On both sides of the

Bending line 16 is first followed by an area 4a in which the two wire sections 3 have an elliptical cross section.

According to the area

4a with the elliptical

The cross section is followed by a shorter region 13a, which is a semicircular one

Has cross section.

On this

Area 13a with a semicircular cross-section then adjoins each of the two wire sections 3 with an area 6a which has a circular cross-section.

BE2018 / 5086

The two proximal areas 6a of the wire piece 17 with a circular cross section facing each other in FIG. 8 form the proximal section 6 of the bristle carrier 2 after the twisting of the wire sections 3 arranged on both sides of the bending line 16. The two middle areas 13a of the wire piece 17 each have a semicircular cross section after twisting, the central section 13 of the bristle holder 2. After the twisting of the two wire sections 3, the two distal regions 4a of the wire piece 17, each with an elliptical cross section, finally form the distal section 4 of the bristle holder 2.

After the wire piece 17 has been profiled, it is bent along the bending line 16 (cf. FIG. 8) and two legs of the wire piece 17 separated by the bending line 16 are placed next to one another as wire sections 3 of the bristle carrier 2 to be produced. Bristle material can then be inserted between the two wire sections 3 defined in this way and the wire sections 3 can be twisted together to form the bristle carrier 2 of the brush 1 in such a way that regions 4a, 6a, 13a of the wire sections 3 of identical cross-section on both sides of the bending line 16 to produce a distal section 4, a middle section 13 and a proximal section 6 of the bristle carrier 2 are connected to one another. These three previously mentioned sections of the bristle carrier 2 then have different cross-sectional geometries from one another.

The wire piece 17 can be on both sides of the bending line 16

BE2018 / 5086 by means of the wire-forming device 19 of the brush-making machine 20 and optionally also with a wire-aligning device 22 of the brush-making machine 20, as is at least partially shown in FIG. 14, in each case in at least one area 6a with a circular, in at least one further or elliptical and

Area 4a with an oval in at least one other

Area

13a with a semicircular cross section, that is to say profiled.

If the wire piece 17 is unwound from a wire supply roll 23, as can also be seen in FIG. 14 as part of the brush manufacturing machine 20, it is expedient to straighten the wire piece 17 by means of the wire alignment device 22. Rolling up the piece of wire onto the supply roll 23 gives it a basic radius which must be removed before profiling. The brush manufacturing machine 20 also comprises three wire clamps 24 with which the wire piece 17 can be gripped and pulled off the supply roll 23.

The wire-forming device 19 comprises two press halves 25 that can be moved on top of one another and onto the wire piece 17 arranged between them, with which the desired cross-sectional profiles can be produced on the wire piece 17. The wire sections 3 of the wire piece 17 to be profiled have a total of at least two different cross sections after their profiling. The wire piece 17 with its two

BE2018 / 5086

Wire sections 3 can after profiling using a

Removed gripper and to downstream

Stations of the

Brush manufacturing machine 20 are passed.

The

Drahtausrichteinrichtung

Wire forming device

Brush manufacturing machine

The wire alignment device is located in front of the

Alignment rollers 26, all of which are also driven by these wire alignment rollers arranged in front.

includes

The several

Individual needs or can be. With help

6 can be straightened from the stock roll of his profiling.

at

Wire straightening rollers 26 original, in which the use of the one in one.

withdrawn wire piece 17 with the wire forming device

The need can also be changed to

Usually circular cross-section

Supply roll elliptical

Is a stripped wire piece 17 or oval cross-section such

Change of

Cross-sectional geometry of the subtracted from the supply roll

Wire pieces desired, it is advantageous to

Wire alignment rollers of the

Drive wire alignment device 22.

Wire piece 17, the wire forming device 19th

After having passed the desired profile, it reaches

Wire cutter

Brush making machine 20.

Wire piece cut to length

Brush manufacturing machine

With this can be.

is that and one of them

The for

Implementation of the method described above set up.

BE2018 / 5086

The screwed-in brush 1 shown in FIGS. 10 to 13 has a bristle carrier 2 which consists of two wire sections 3 twisted together. Each of the two wire sections 3 comprises areas 4a, 6a and 13a with different cross sections.

Wire sections 3 connected to one another via a bending line 16 are also shown in FIGS. 15 to 18. The wire sections 3 shown in FIGS. 15 to 18 have not yet been twisted together and have not yet been provided with bristle trimmings 5 and can therefore also be referred to as bristle carrier blanks from which bristle carriers 2 for screwed-in brushes 1 can be produced. All of the bristle carrier blanks shown in FIGS. 15 to 18 are suitable for producing a screwed-in brush 1.

The two bristle carrier blanks of bristle carriers 2, which are shown in FIGS. 15 and 16, each consist of two wire sections 3, each of the two wire sections each having a proximal region 6a in which the respective one

Wire section 3 has a round and here even a circular cross section.

To each of the proximal ones

Areas 6a close a middle area 13a of the respective

Wire section 3, which finally merges into a distal region 4a of the respective wire section.

The wire sections 3 of the bristle carrier blank have in the middle region 13a and in the distal region 4a

BE2018 / 5086 according to FIG. 15 has a rectangular cross section.

This leads to the bristle carrier 2 emerging from the

Bristle carrier blank is made at its distal

Section a comparatively small one

External dimensions so that one with this

Bristle holder 2 equipped screwed brush 1 is for relatively small

Hole diameter, so for

Example of a comparatively small one

Interdental spaces are suitable.

The brush holder blank, which is shown in FIG. 16, comprises two wire sections 3, the central area 13a and distal area 4a of which is truncated pyramid-shaped and thus tapers in the direction of the distal end of the bristle holder 2 or the wire sections 3. This also favors a comparatively small external dimension of the bristle carrier 2 in its distal section 4, so that this bristle carrier 2, which can be produced from the bristle carrier blank shown in FIG. 16, is also particularly suitable for producing an interdental brush.

In the wire sections 3, which are shown in FIGS. 15 to 18, the two wire sections 3, which are assigned to a bristle carrier 2, also have profiles which are identical to one another. This means that each of the two wire sections 3, which are connected to one another via the bending line 16, has the same sequence and design of regions 4a, 13a and 6a.

BE2018 / 5086

The wire sections 3 of the bristle carrier 2 blanks shown in FIGS. 17 and 18 each taper in the direction of their distal end. As already stated above, the two wire sections 3 of the exemplary embodiment shown in FIG. 17 have a frustoconical shape, that is to say a shape which tapers conically towards the distal end. at

Figure 18 embodiment shown in one

Blank one

Bristle holder with two

Wire sections 3 can be seen that each of the

Wire sections 3 one towards its respective distal

Truncated pyramid-shaped end

shape

So these point

Wire sections 3

Areas with different, namely smaller, cross sections.

In the embodiments of

Wire sections 3 according to FIGS. 17 and 18, which are suitable for the production of bristle carriers 2 of screwed-in brushes 1, have the different cross sections of the three

areas

4a,

6a and

13a of each

Section of wire the same

Cross-sectional shape.

However, they are becoming smaller

Cross-sectional areas of the cross sections of each wire section 3 the closer they are to the respective distal

end of

Wire sections 3 lie.

In the exemplary embodiments of wire sections 3, which are shown in FIGS. 15 to 18, the wire sections 3 have an oval and / or elliptical shape, at least in the regions 4a which form the distal section 4 of the bristle carrier 2

BE2018 / 5086

Cross-sectional shape on different cross-sections. There are therefore no oval and / or elliptical cross sections here.

FIG. 19 now shows a non-exhaustive collection of possible cross-sectional shapes that can be used in the production and design of wire sections 3 in the different areas 4a, 6a and 13a of the wire sections 3. At this point it should be expressly mentioned that the wire sections 3 in their different regions 4a, 6a and 13a can also be provided with cross-sectional shapes or cross-sections other than those shown in FIG. 19.

As an improvement in the technical field of the screwed-in brushes 1, such a brush 1 with a bristle holder 2 made of twisted wire sections 3 is proposed, which have oval and / or elliptical cross sections at least in the distal section 4 of the bristle holder 2. Furthermore, a screwed-in brush 1 is also proposed, the bristle carrier 2 of which has a pull-out safety device 12 at a distance from its proximal end 11. With the help of this pull-out safety device 12, the bristle carrier 2 can be secured against pulling out on the handle 7 of the screwed-in brush 1. In addition, a method for producing a screwed-in brush 1 is also proposed, in which wire sections 3 are twisted together to form a bristle carrier 2, at least one wire section 3 of which has at least two areas 4a, 6a, 13a with different shapes

BE2018 / 5086

Has cross sections. Another object of the invention is a brush manufacturing machine 20, which has a wire shaping device 19 with which a cross section of the wire section 3 to be profiled can be changed in at least one area 4a, 6a, 13a of a wire section 3 to be profiled, so that the wire section 3 according to FIG

Profiling has at least two areas 4a, 6a, 13a with differently shaped cross sections.

BE2018 / 5086

LIST OF REFERENCE NUMBERS

brush

bristle carrier

Wire sections distal section of 2

4a distal area of FIG. 3

Bristle trim on 2 proximal section of 2

6a proximal area of 3

Handle

injection mold

Injection port

Free space proximal end of 2

pull-out protection

Middle section of 2

13a middle area of 3 proximal paragraph distal paragraph

elastic line

Wire piece distal end of 2

Wire forming device

Brush manufacturing machine

removal gripper

Drahtausrichteinrichtung

supply roll

wire terminals

Press halves

Drahtausrichtrollen

Wire cutter

Claims (24)

Expectations 1. Twisted brush (1), in particular mascara brush or interdental brush, with one Bristle carrier (2) at least from two wire sections (3) twisted together, one at a distal section (4) of the bristle carrier (2) Bristle trim (5) is formed, characterized in that at least one wire section (3) of the at least two wire sections (3) has at least two areas (4a, 6a, 13a) with different cross sections. 2. Twisted brush (1), especially mascara Brush or interdental brush, preferably after Claim 1, with a bristle carrier (2) at least from two wire sections (3) twisted together, wherein on a distal section (4) of the Bristle carrier (2) is formed with a bristle stock (5), characterized in that the Wire sections (3) at least in areas (4a) which form the distal section (4) of the bristle carrier (2) have oval and / or elliptical cross sections. 3. Twisted brush (1), in particular according to claim 1 or 2, with a bristle carrier (2) consisting of at least two twisted wire sections (3), with a distal section (4) of the Bristle carrier (2) has a bristle trim (5), characterized in that the Bristle carrier (2) spaced from its proximal BE2018 / 5086 End (11) has a pull-out safety device (12) with which the bristle carrier (2) can be fixed to a handle (7) which can be arranged or arranged on a proximal section (6) of the bristle carrier (2). 4. Brush (1) according to one of claims 1 to 3, characterized in that at least one wire section (3), preferably all wire sections (3), at least two areas (4a, 6a, 13a) with different shapes Has cross sections, the pull-out protection (12) being formed by a change in cross section of the bristle carrier (2) along its longitudinal extension, which results from the different cross sections of the at least one wire section (3) in the case of twisted wire sections (3). 5. Brush (1) according to one of the preceding claims, characterized in that the bristle carrier (2) between its distal section (4) and its proximal section (6) has a central section (13), between the central section (13) and the proximal section (6) has a proximal shoulder (14) as a pull-out safety device (12), via which the handle (7) can be positively connected to the bristle holder (2) and connected in the position of use. 6. Brush (1) according to one of the preceding claims, characterized in that the bristle carrier (2) BE2018 / 5086 in its central section (13) for generating the pull-out protection (12) has an outer dimension which is measurable in a spatial direction oriented to the longitudinal extension of the bristle carrier (2) and which is smaller than one in the same Direction measured Outside dimension of the Bristle carrier (2) in its adjacent proximal section (6). 7. Brush (1) according to one of the preceding claims, characterized in that the bristle carrier (2) between the central section (13) and the distal section (4) has a distal shoulder (15), in particular being used to produce the distal shoulder ( 15) between the central section (13) and the distal section (4), an outer dimension of the. Which can be measured in a spatial direction oriented to the longitudinal extent of the bristle carrier (2) Bristle carrier smaller or (2) larger in its central section (13) than one in the same Direction measured Outside dimension of the Bristle carrier (2) in its distal section (4). 8. Brush (1) according to one of the preceding claims, characterized in that regions (6a) of the wire sections (3) which form the proximal section (6) of the bristle carrier (2) have circular or elliptical or oval or semicircular cross sections. 9. Brush (1) according to one of the preceding claims BE2018 / 5086 characterized in that regions (13a) of the wire sections (3) which form the middle section (13) of the bristle carrier (2) have semicircular cross sections, in particular with two wire sections (3) twisted together to form the middle section (13) Flat sides of their respective semicircular cross sections face each other. 10. Brush (1) according to one of the preceding claims, characterized in that regions (4a) of the wire sections (3) which form the distal section (4) of the bristle carrier (2) have oval and / or elliptical cross sections, in particular wherein two in the distal section (4) of the Bristle carrier (2) twisted together Wire sections (3) with one of each Secondary to their elliptical Cross sections face each other. 11. Brush (1) according to one of the preceding claims, characterized in that the handle (7) is fastened to the bristle carrier (2) in such a way that it is injection molded around the bristle carrier in such a way that it grips the proximal section (6) and the pull-out protection (12 ), preferably at least partially encloses the central section (13) of the bristle carrier (2). 12. Brush (1) according to one of the preceding claims, characterized in that the wire sections (3) two interconnected legs of one BE2018 / 5086 are wire piece (17) bent along a bending line (16), preferably wherein the bending line (16) is formed at a distal end (18) of the bristle carrier (2) and / or is arranged in the middle of the wire piece (17) , 13. Brush (1) according to one of the preceding claims, characterized in that the at least two wire sections (3) are twisted together over a partial area of their respective lengths or that the at least two wire sections (3) are twisted together over their entire length. 14. Brush (1) according to one of the preceding claims, characterized in that at least two or more or all of the wire sections (3) are identical Have profiles or different profiles. 15. Brush (1) according to one of the preceding claims, characterized in that at least one Wire section of the at least two wire sections Direction of his distal Tapered in the end, especially that the at least one Wire section is conical, frustoconical, pyramid-shaped or truncated pyramid-shaped. 16. Brush (1) according to one of the preceding claims, characterized in that the different cross sections of the at least two areas (4a, 6a, 13a) have the same cross-sectional shape, but have different cross-sectional areas. BE2018 / 5086 17. Brush (1) according to any one of the preceding claims, characterized in that the wire sections (3) at least in areas (4a), the distal Form section (4) of the bristle carrier (2), from an oval and / or elliptical Cross-sectional shape differing cross-sections or have no oval and / or elliptical cross-sections. 18. Process for making a screwed-in Brush (1), in particular according to one of the preceding claims, wherein at least two wire sections (3) are twisted together to form a bristle carrier (2), at least one of which is a profiled wire section (3) which has at least two areas (4a, 6a, 13a) with differently shaped cross sections. 19th Procedure according to Claim characterized in that at least one wire section for all wire sections (3) before twisting Production of the bristle carrier (2), in particular identical, is / are profiled in such a way that he / she has at least two each areas 6a, with different shapes Has / have cross sections, in particular with cross sections having the same cross section areas 6a, the profiled Wire sections (3) are twisted together. 20. The method according to claim 18 or 19 thereby BE2018 / 5086 characterized in that the wire sections (3) are connected to one another to form a wire piece (17), that the wire piece (17) is bent over after the profiling of the wire sections (3) along a bending line (16) around the wire sections (3) to bring one in a relative position required for the twisting. 21. The method according to any one of claims 18 to 20, characterized in that the wire sections elastic line Wire forming device on one side or in particular by means of and / or that of one Wire alignment device (22), each in one Area (4a, 6a, 13a) with a circular and / or in one area (4a, 6a, 13a) with an oval and / or in one area 13a) with an elliptical and / or in each area (4a, 6a, 13a) with a semicircular cross section. 22. Brush manufacturing machine (20) for Production of twisted brushes (1), in particular according to one of the Claims up to 17, characterized in that the Brush manufacturing machine Wire shaping device (19), with which in at least one area (4a, 6a, 13a) of a wire section (3) to be profiled a cross section of the wire section (3) to be profiled can be changed, so that the wire section (3) at least after profiling two areas (4a, 6a, BE2018 / 5086 13a) with differently shaped cross sections. 23. Brush manufacturing machine (20) according to claim 22, characterized in that the Brush manufacturing machine Wire forming device (19) transport direction Wire alignment device (22) (20) has one of the ones upstream in wire and / or that the brush production machine (20) has one Has wire cutting device (27). 24. Brush manufacturing machine (20) according to claim 22 or 23, characterized in that the 15 brush manufacturing machine (20) is set up to carry out a method according to one of claims 18 to 21.