EP3174433B1 - Wire-core applicator with bevelled hollow fibre bristles - Google Patents

Description

The invention relates to a mascara brush with a core made of at least two wire sections twisted together and with a bristle facing made of bristles that are formed by filaments that are hollow on the inside and that are held clamped between the two wire sections.

Such applicators are also referred to as wire core applicators.

To this day, these applicators are held in high esteem, because they not only have advantages in use, but also have various manufacturing advantages that cannot be achieved with the sprayed applicators that compete with them. So e.g. For example, small series can also be produced quite effectively, since very different wire core applicators can usually be produced on the existing production systems without having to invest considerable sums in new tools for a special applicator, unlike with injection-molded applicators.

In general, it also applies to wire core applicators that they should meet two requirements in particular:
Your bristles should have the highest possible mass storage capacity, so that the applicator only has to be dipped once or only a few times into the supply of cosmetics in order to coat the eyelashes with a sufficiently voluminous layer of mascara.

On the other hand, their bristles should have the best possible separation capacity, ie the ability to separate obliquely superimposed eyelashes of the eyelash arch from one another separate and align largely parallel. This is not least because the eyelashes can only be given the desired volume by the mascara mass if they are individually coated all around and are not already soaked in tufts of mascara mass.

In general, therefore, it applies to wire core applicators that they have to meet particularly high demands on the mass storage capacity with regard to the substance to be applied with them.

In the present case, however, it is not just about increasing the mass storage capacity to such an extent that the applicator does not have to be dipped and reloaded too often when applying mascara. In addition, it is primarily a matter of ensuring that an eyelash is wetted as intensively as possible with mascara mass in one application process in order to make the eyelashes appear as voluminous as possible right away - without having to coat the eyelashes several times and risking that the separation will suffer and neighboring eyelashes will eventually stick together due to the multiple mascara application.

The starting point for achieving this is to provide the mascara applicator with bristles which, after dipping into the mascara supply, each carry the thickest possible film of mascara mass.

In order to take this into account, a wide variety of solutions have already been proposed in the prior art.

For example, this is how it works U.S. Patent 4,733,425 in front, To use bristles that are hollow inside or that have a star-shaped, non-circular cross-section. These bristles are said to have excellent mass storage capacity, in particular the bristles that are hollow on the inside, since they can store mascara mass in the area of their interior due to their capillary action with appropriate rheological adjustment of the mascara mass.

The patent application U.S. 2004/011375 A1 suggests bristles with a double beveled tip like a chisel, which can optionally also be hollow on the inside. Such a tip, which is double-beveled in the manner of a chisel, is intended to give the bristle optimum combing and separating power. A connection between the type of bevel and the mass storage and mass release capacity is not established here. According to JP2008307304 the front end of at least part of the bristles has a tapered shape that has been melted by a heating process.

If you examine hollow bristles systematically, you will find that the bristles can actually absorb mascara mass quite well due to the capillary action of their hollow interior. The picking up of mascara is made easier not least by the fact that the applicators are often submerged for hours in the storage container filled with the mascara between two applications, so that the capillary effect, which naturally results in a comparatively slow "suction", can unhindered wearing can come.

The balance is more critical when the mascara mass is released again within the application, which only lasts for a short moment. Even when the bristles are flexed back and forth, thereby pressurizing the supply stored inside them and expelling them to the outside, systematic Try to find that the output of the mascara mass is a "bottleneck", so that improvements are required in this respect.

It is therefore the object of the invention to specify a mascara brush equipped with hollow bristles, in which the mass delivery is improved compared to the known applicators.

This problem is solved with a mascara brush having the features of claim 1 and with a mascara brush with the features of claim 2.

The mascara brush according to the invention has a core made of at least two wire sections twisted together and a bristle facing made of filaments which are hollow on the inside and which are each held clamped between the two wire sections. The filaments form bristles, which are usually no longer in the clamping area of the wire core, but are otherwise hollow on the inside and thus have the necessary capillary effect to absorb mascara mass. It is in no way important that mascara mass is drawn into the bristle over the whole or most of its length by the capillary effect; rather, mostly what is happening at the radially outward end of the respective bristle is of interest.

The mascara brush according to the invention is characterized in a first aspect in that the radially outward, free ends of the bristles are cut obliquely in the manner of a simple wedge, so that a first side of the bristle in question, seen from the wire core along the respective bristle, is seen from a has a maximum length and the diametrically opposite second side has a minimum length. This means that the bristle ends are not chisel- or roof-like, i. H. sharpened from two sides. Instead, at the end of the bristle in question there is a single end face, called the cut face, which runs obliquely in a wedge-like manner to the longitudinal axis of the bristle and, figuratively speaking, resembles the obliquely cut end of a cut rose.

The term "obliquely cut" in the context of the invention is not to be understood to mean that the wedge surface must have been created by a cutting operation, ie a "oblique cutting" of the filament a corresponding grinding of the bristle end must have occurred, this is even the preferred type of production.

The decisive point is that the bevel cut and the resulting wedge surface make the mouth of the bristle significantly larger and thus create a larger area in which the mascara mass can be stored in such a way that it is immediately available for dispensing when it is applied and that The mascara stored a little deeper in the interior of the bristles can also be released more easily via the larger mouth area.

In addition, the cut surface of the bristles resulting from the bevel cut forms a large contact area along which the individual eyelashes can slide for some time before they slip off the end face of the bristle and lie down between neighboring bristles. Meanwhile, the eyelashes have plenty of opportunity to be wetted with mascara mass. This also distinguishes the invention from the prior art, because the individual eyelashes can only stay for a much shorter time on the small-area end face of a hollow bristle running essentially perpendicular to the longitudinal axis of the bristles without a sloping cut surface before they slip off into the spaces between the bristles.

In a mascara brush of the type specified in the introduction, which has bristles with a wedge-shaped bristle tip at their free ends and at least one cut surface (4) forming a wedge, the surface roughness (Rz) of the respective cut surface (4) can be between 0.2 µm and 6. 3 μm, in particular between 2.9 μm and 6.3 μm.

The surface roughness Rz, also known as roughness depth, is to be determined in accordance with DIN EN ISO 4287/4288.

The formation of wedge-shaped cut surfaces which improve combing and have the indicated roughness Rz between 0.2 μm and 6.3 μm, in particular between 2.9 μm and 6.3 μm, improves the mascara absorption capacity of each wedge-shaped, obliquely cut bristle. It is of particular advantage here that the sloping cut surfaces have a good mascara absorption capacity due to the roughness according to the invention and thus also a correspondingly good mascara delivery capacity to the eyelash hairs initially sliding along them during the combing process. The cut surfaces are of particular importance insofar as the eyelashes are first guided and slide along this surface during the make-up process at the beginning of the make-up movement. The surface roughness (Rz) can be produced in particular by grinding the bristle ends using a grinding wheel. The roughness and the associated mass absorption and mass storage capacity for mascara mass are improved by the roughening. In particular, by appropriately selecting the roughness of the grinding wheel(s) used during grinding, the desired roughness of the inclined cutting surface can be influenced and defined.

The above object is thus achieved with a mascara brush with a core made of at least two wire sections twisted together and a bristle facing made of bristles formed by filaments. The filaments are each held clamped between the two wire sections. The bristles are made of a hollow plastic material and have a wedge-shaped tip at their free end instead of an end face running essentially perpendicular to the longitudinal axis of the bristles.

It is therefore expedient if most of the bristles as a whole have a wedge-shaped tip with at least one cut surface and some of the bristles have a wedge-shaped tip formed by a bevel cut and with a cut surface.

As will be explained in more detail later, the at least one wedge surface with which a bristle can be equipped according to the invention makes it possible to push the bristle between the eyelashes at the beginning of application in such a way that the respective eyelash stays in better contact with the bristle, and that too even after the eyelash has slipped off the cut surface forming the wedge surface into the region of the bristle shaft. As a result, the respective bristle shaft and the cut surfaces, which store a thicker film of mascara mass due to their increased roughness, can deliver more of this mascara mass to the eyelashes. This results in a better coating of the eyelash. Last but not least, this benefits the eyelash volume that can be achieved.

According to the invention, the wedge-shaped tip of the respective bristle is formed by a bevel cut in the manner of a simple wedge, so that a first side of the bristle in question has a maximum length (L _MAX ) and its diametrically opposite second side has a minimum length (L _MIN ). In this way, a particularly long wedge surface that slopes down flatly in relation to the longitudinal axis of the bristles can be produced, which favors the effect to be used according to the invention.

For other applications, which do not form part of the invention, the wedge-shaped tip can be formed by a double oblique cut consisting of two converging surfaces which intersect at the free end of the bristle, at least in its imaginary one Renewal. In this way, the bristle in question can act on both sides and thus influence two eyelashes that have applied against the bristle from different sides. Some of the bristles can have a wedge-shaped tip formed by a double oblique cut, which comprises two converging cutting surfaces which intersect or their imaginary extensions intersect at or in the area of the free end of a respective bristle. A bristle designed in this way can displace eyelashes on both sides and thus separate them. Unlike a bristle that is simply cut off at an angle, such a bristle does not show any disturbing preferred direction.

It is particularly favorable if the cut surfaces are essentially flat. Ideally, two opposite cut surfaces at the same bristle end are essentially the same size.

The bristles can be aligned in such a way that one or the two opposite cutting surfaces at a bristle tip are arranged transversely to the longitudinal axis of the wire core, in which case the bristles in particular, which are only equipped with a cutting surface on one side, are arranged and aligned in such a way that a Part of the respective cut surfaces is aligned with the direction towards the brush tip bearing the bristles and a part towards the opposite end of the brush. In a further embodiment, the invention is therefore characterized in that the cut surfaces are aligned transversely, in particular perpendicularly, to the longitudinal axis (LD) of the wire core. It is also advantageous here if the cut surfaces of the bristles are aligned with a cut surface partially in the direction of the end of the brush and partially in the direction of the brush tip. As part of this According to the preferred exemplary embodiment, it is therefore provided that the cut surface formed by the bevel cut is aligned in such a way that, when looking along the longitudinal axis of the wire core (i.e. with a frontal view of the free end of the wire core or with a frontal view of the free end provided for attachment to the handle end of wire core) looks at the gate face frontally, while looking circumferentially does not look at the gate surface. This preferably applies to all bristles of the trimming.

A mascara brush can have several different types of bristles on its bristle tip. For example, a bristle trimming in its entirety can have bristles with a tip that is not pointed and not wedge-shaped and bristles with a bristle tip that is wedge-shaped and has two opposite cut surfaces and bristles with a bristle tip that is wedge-shaped but only has a cut surface on one side, the cut surfaces being divided into different Directions, once towards the end of the bristle and once towards the bristle tip, have. It is therefore particularly expedient if the individual types of bristles are arranged systematically in the bristle stock and are assigned to areas, zones or sectors of the bristle stock. The invention is therefore further characterized in a further development by the fact that the bristle stocking has several areas, sectors or zones which, in the circumferential direction of the bristle stocking, run transversely, in particular perpendicularly, to the longitudinal axis of the wire core (LD) or in the circumferential direction of the bristle stocking spirally to the longitudinal axis of the wire core (LD) or in Longitudinally of the bristle facing along, in particular parallel, to the wire core longitudinal axis (LD) are aligned running, and each at least one of several to each other adjacent bristles each having a similarly designed bristle tip, or are formed by such a row of bristles, and which are arranged in the circumferential direction and/or in the longitudinal direction of the bristle facing adjacent to a/an area or sector or zone comprising a plurality of bristles, whose/ whose bristles have a bristle tip that is designed differently.

However, it is also possible for the bristle stock to have several areas, sectors or zones that run in the circumferential direction of the bristle stock transversely, in particular perpendicularly, to the longitudinal axis of the wire core (LD) or in the circumferential direction of the bristle stock spirally to the longitudinal axis of the wire core (LD) or in the longitudinal direction of the bristle stock along , in particular parallel, to the longitudinal axis of the wire core (LD) and which each comprise at least one row of bristles consisting of a plurality of adjacent bristles, the adjacent bristles of which each have a differently designed bristle tip.

Overall, for example, all bristle types of the bristle types described above or in this application as a whole can be arranged alternately adjacent to one another in an area or a zone or a sector and thereby form an area or a zone or a sector. However, it is also possible for only one type of bristle to be arranged in an area or zone or sector and then, for example in the circumferential direction of the bristle facing, an area or zone or sector with a different type of bristle follows one another in alternation. Preferably, an area or a zone or a sector comprises at least two bristles. All conceivable combinations of bristle types and areas, zones and sectors are of course possible. For example, must not all of the bristle types mentioned above or all of the types of bristles described as a whole occur in every zone or in every area or in every sector or are basically present in a set of bristles.

The extent of a zone, an area or a sector can vary. In a further expedient embodiment, the invention therefore provides that the several areas, sectors or zones in the circumferential direction transverse or along the longitudinal axis (LD) of the wire core once sweep over the circumference or a partial area of the circumference of the bristle facing.

In principle, it can be the case that an area or a zone or a sector covers an angular distance that makes up 1/8 to 1/64 of the circumference or the enveloping circle of the bristle facing and thus an angular extension between 5.6° and 45°.

With regard to the bristles each equipped with a beveled cutting surface, it can be expedient to alternate between an area or a sector or a zone in which the cutting surfaces of all the bristles are aligned pointing in the direction of the brush tip and an area or a sector or a zone , in which / which the cut surfaces of all bristles are aligned pointing towards the end of the brush. This can be achieved, for example, in that in a first step the bristle stock to produce the cut surfaces is moved with a grinding wheel from the brush tip parallel and along the longitudinal axis of the wire core to the end of the brush, then the bristle stock or the mascara brush by, for example, 1/8 turn, which is one 45° rotation, is rotated and the grinding wheel then in the opposite direction to the previous one Step is moved in a second step from the end of the brush parallel and along the longitudinal axis of the wire core to the tip of the brush. This sequence of steps is carried out until the 360° circumference of the bristles has been completely traversed and swept over by the grinding wheel.

It can also be advantageous if the bristle stocking consists of bristles or filaments with a wedge-shaped point and further bristles or filaments without a wedge-shaped point, the bristle stock being preferably designed in such a way that the bristles or filaments with a wedge-shaped point have one or more sectors ( en) of the set of bristles and the further bristles or filaments form one or more further sector(s), the sector(s) and the further sector(s) preferably and ideally alternating in the circumferential direction follow one another, which the invention also provides in an embodiment.

According to a further embodiment of the invention, it is expedient for there to be between 1 and 8 sectors and between 1 and 8 further sectors.

It can also be advantageous here that the bristles or filaments with a wedge-shaped tip are arranged in the bristle stock, which otherwise consists of other bristles or filaments, so that they form a path running spirally on the peripheral surface of the bristle stock, which the invention also provides.

It can also be expedient for the other bristles or filaments to consist of the same material as the bristles or filaments with a wedge-shaped tip.

It is also advantageous here that the chisel surfaces of the bristles or filaments with a wedge-shaped tip are aligned perpendicular to the course of the imaginary longitudinal axis of the spiral path, neglecting their wedge angle.

It is particularly expedient if the angle (α) by which the cut surface(s) formed by the bevel cut or the double bevel cut is/are inclined relative to the longitudinal axis of the bristles maintains the relationship α≦55° and ideally even α≦35°. This results in a particularly long cut surface that is easy to use because it slopes down only flatly in relation to the longitudinal axis of the bristles. Maintaining the relationship α ≤ 20° has proven to be ideal. This is preferably accompanied by a so-called double bevel, i. H. one and the same cutting surface is ground a first time and then, in a separate operation, a second time, which allows such a steep angle to be achieved. The invention is therefore further characterized in that for the angle by which the cut surface(s) formed by the bevel cut or the double bevel cut is/are inclined relative to the longitudinal axis of the bristles, the relationship α≦55°, preferably α≦35°, in particular α ≤ 20°.

The filaments forming the bristles can have a non-round cross-section and preferably a polygonal or square cross-section.

Surprisingly, it has turned out to be particularly favorable to design the bristles or filaments according to the invention to be tubular, hollow on the inside, preferably over their entire length (before twisting). This results in a particularly favorable, synergistic effect, precisely when the bevel cut is made by grinding the bristles will be produced. If the bristle is hollow on the inside, it can store mascara mass in its hollow space, which is released to the outside in the course of application via the mouth of the hollow space, which lies in the middle of the center of the cut surface. The lashes are thus already pre-coated as they slide along the cut surface, which further improves the mascara application overall. An essential point here is that the bevel cut and the resulting wedge surface allows the mouth of the hollow bristle to be significantly larger and thus creates a larger area in which the mascara mass can be stored so that it is immediately available for dispensing when it is applied and that the mascara stored a little deeper inside the bristles can be released more easily via the larger mouth area. In addition, the cut surface of the bristles resulting from the bevel cut forms a large contact area along which the individual eyelashes can slide for some time before they slip off the end face of the bristle and lie down between neighboring bristles. Meanwhile, the eyelashes have plenty of opportunity to be wetted with mascara mass. The individual eyelashes can only stay for a significantly shorter time on a small-area end face of a hollow bristle, which runs essentially perpendicularly to the longitudinal axis of the bristles, before they slip off into the spaces between the bristles. The invention is therefore characterized in that the bristles or filaments are tubular and hollow inside and preferably in the direction along them

Longitudinal axis are continuously slotted. It is favorable to design the bristles or filaments to be continuously slotted in the direction along their longitudinal axis. In this way, the bristles or filaments become somewhat more unstable, or their stability can be better controlled, so that the bristles deform more during application in such a way that bristles are stored in their cavity Mascara mass is dispensed through the mouth in the area of the bevel cut.

Preferably, the outside diameter of bristles that are circular is 1≧115 μm and even better ≧215 μm. In the majority of cases, the outer diameter of the circular bristles used in the invention is 1≦320 μm. The embodiment of the invention is therefore also characterized in that the outer diameter of circular bristles is ≧115 μm, preferably ≧215 μm, and ≦320 μm.

Where the bristles are non-circular, the outside enveloping circle of bristles that are non-circular in cross-section has an enveloping circle diameter that is ≥ 100 µm and more preferably ≥ 200 µm. In the majority of cases, the outside enveloping circle of the bristles used in the invention and having a non-circular cross-section is ≦340 μm and better still ≦320 μm. Finally, the invention is also characterized in that the outside enveloping circle of non-circular bristles has an enveloping circle diameter that is ≧100 μm, preferably ≧200 μm, and ≦340 μm, in particular ≦320 μm. The enveloping circle is to be understood here as the circle in which the respective cross section of the bristle can be inscribed in the best possible way.

Both the outer diameter of the bristles and the enveloping circle diameter are ≦340 μm, in particular ≦320 μm, because otherwise the bristles become so coarse that their ability to separate the eyelashes is restricted too far.

Where the bristles are hollow, the wall thickness of the bristles used, measured perpendicularly to the outer surface be between 15 µm and 100 µm. The wall thickness of the bristles or their bristle casing, which delimits the cavity inside the bristle, is selected in each case in such a way that the hollow bristle undergoes sufficiently strong deformations under the influence of the forces typically occurring during application, by the mass stored in its interior to push outside.

It has proven particularly favorable if, according to the invention, the corners of the radially outward bristle tips are rounded. In addition, particles can also be added to the plastic material, or an additional effect that improves the mass absorption capacity can also be achieved by so-called indentations, i.e. punctiform depressions, instead of particles protruding locally over the surface, i. H. by a large number of local indentations in the bristle surface, which (seen microscopically or greatly enlarged) profile the bristle surface like a crispbread and thus make it more absorbent. Advantageously, the number of indentations or punctiform indentations or indentations distributed over a respective bristle is more than 200.

There may be a further need for optimization in particular if the wire core applicator has a particularly dense set of bristles. In principle, it is then clear that the separating capacity of the bristles can be further increased by making the bristles from as hard a material as possible, which gives the bristles greater rigidity and buckling resistance with the same diameter and therefore has two positive effects. A stiff bristle is inherently better at penetrating between overlapping eyelashes in the eyelash arch. A stiff bristle also shows a significantly lower Tendency to avoid the grinding wheel and therefore offers the possibility of a stronger point cut than a softer bristle. However, when trying to use hard materials and in particular hard plastic materials, the problem arises that the quality of the outer edge of the ground surface can decrease during the grinding. The problem can arise that the edge no longer forms a clean, continuous line, but instead shows a jagged contour, which can prevent the eyelashes from sliding along the edge. In order to avoid this, it can be provided that the bristles consist of two different plastics, have a bristle casing made of a first, softer material and a bristle core, connected to the bristle casing, made of a second, harder material. Since bristles that are as hard as possible and at the same time slim are advantageous for separating eyelashes as efficiently as possible, it would have made sense to make the coat of the filament or the coat of the bristles from the harder material and not the core. This is because the radially outward areas of a cylinder are known to contribute many times more to the flexural rigidity than the central or core area of a cylinder, which is close to the neutral axis. However, it has been shown that the core also gives the filament or the bristles formed by the filament greater flexural rigidity, even if the bristle ends are generously ground and thereby lose most of their original coat in the ground area. The hard core, which is largely retained during grinding, simplifies sharpening the free bristle ends as flatly as possible by grinding them, because it prevents the bristles from escaping the grinding wheel too easily and therefore not coming into close enough contact with the grinding wheel to be sanded efficiently and above all over a considerable length. Consequently the described configuration of the bristles makes it much easier to provide the respective bristle end with a wedge angle that is as flat as possible and at least one wedge surface that is as long as possible.

On the other hand, the soft coat, which is supported by the hard core, behaves extremely well when sanded and surprisingly forms a well-defined outer edge, free from fraying and/or breakouts, i. H. Irregularities on which the individual eyelashes could get caught when the sharpened bristle end penetrates the eyelash trimmings, which could have a negative impact on the separation result.

It can be advantageous if the majority of the filaments or bristles of the bristle facing consists of such a material mix and structure. So z. B. among the filaments forming the bristle stock or brush stock, for example, also a certain number of filaments, often forming a minority, e.g. B. thinner filaments are located, each consisting of only a single material. The filaments are preferably made of the softer material that is also used for the ground filaments.

It can be provided that at least 75% of all filaments and ideally even all filaments used for a mascara applicator consist of the claimed material mix.

The first and preferably also the second material can be a plastic, ideally a thermoplastic.

The two plastics can be firmly connected to each other by coextrusion and the filaments can Be parts of an endless coextruded thread or multiple endless coextruded threads. Co-extrusion is not just any arbitrary, interchangeable process, but imprints its special microstructure on the endless thread and thus also on the filaments cut from it and the bristles formed from it. This microstructure is characterized on the one hand by the fact that the two different plastic materials are particularly intimately bonded or welded or fused to one another and on the other hand by the fact that their plastic molecule chains have a significant orientation in the direction of the longitudinal axis, which later forms the longitudinal axis of the bristles. A cavity can be created, for example, after the coextrusion of such a filament by slitting and partial coring.

The second material to be preferred is one that has a modulus of elasticity (E modulus) of at least ≧1300 N/mm ² . It is significantly better if the second material has at least a modulus of elasticity of ≧1700 N/mm ² . For most applications it is advisable if the modulus of elasticity of the second material does not exceed 2700 N/mm ² .

It can be beneficial to incorporate polyamide 6.12 as the first material in the bristle core. In this case, the first material can have a Shore D hardness of ≦80. The procedure for measuring the Shore hardness D is standardized, the relevant standards are DIN EN ISO 868 and DIN ISO 7619-1.

In the context of a preferred exemplary embodiment, it is provided that the filaments in the non-clamped state, ie before they are clamped between the twisted wire legs, have a non-round cross-section over their entire length and preferably a square cross-section. The have a corresponding cross-section bristles formed from these filaments after twisting.

In the context of a preferred exemplary embodiment, it is provided that the angle a, by which the cut surface formed by the bevel cut is inclined relative to the longitudinal axis L of the bristles, maintains the relationship α≦55° and ideally even α≦35°. In particular, if the preferred value is observed, a long oblique cut results, via which a significant part of the mascara mass stored by the relevant bristle can also be released again. In a particularly preferred exemplary embodiment, which in the majority of cases is produced by a second bevel, an angle α≦20° is provided, which leads to particularly slender bristles.

It has proven to be particularly advantageous if the cut surface of the bevel cut is aligned in such a way that when looking along the longitudinal axis of the applicator (i.e. when looking frontally at the free end of the wire core or when looking frontally at the end of the wire core) looking at the gate surface and not looking along the circumferential direction. With such an orientation of the cutting surface, the area in the direction of movement of eyelashes moving radially inward into the bristle stocking is of maximum size, so that the chance that individual eyelashes hit the cutting surface directly is particularly high.

It has proven particularly favorable if the corners of the radially outward bristle tips are rounded according to the invention.

The outer diameter of the circular bristles according to the invention is preferably greater than or equal to 115 μm and even better is greater than or equal to 215 µm. For many applications, it is preferably the case that the outer diameter should preferably not exceed 320 μm, because otherwise the bristles become so coarse that their ability to separate the eyelashes is restricted too far.

Similar orders of magnitude should be observed when using bristles with a non-round cross-section.

It is preferred here that the outside enveloping circle of the bristles according to the invention, which are non-circular, has an enveloping circle diameter that is greater than or equal to 100 μm and better still greater than or equal to 200 μm. The enveloping circle is to be understood here as the circle in which the respective cross section of the bristle can be inscribed in the best possible way. Here, too, there is preferably an upper limit for the diameter of the enveloping circle, which should be observed in order to avoid bristles that are too coarse and have insufficient separating capacity. Therefore, for many applications, it is preferably the case that the enveloping circle diameter should not exceed 350 μm and preferably 320 μm.

The wall thickness of the bristles or their bristle casing, which delimits the cavity inside the bristle, must be chosen so that the bristle undergoes sufficiently strong deformations under the influence of the forces typically occurring during application in order for the mass stored inside to move outwards press. The wall thickness of the bristles according to the invention, measured perpendicular to the outer surface, is therefore preferably between 15 μm and 100 μm, the limit values included in each case.

• Die Fig. 1 zeigt ein Ausführungsbeispiel der erfindungsgemäßen Borste von vorn, d. h. in Draufsicht auf die Anschnittfläche, die die gewünschte Keilfläche bildet.
• Die Fig. 2 zeigt eine erfindungsgemäße Borste gem. Fig. 1 in Seitenansicht ihrer Keilfläche.
• Die Fig. 3 zeigt die Fig. 2 im Schnitt entlang der Borstenlängsachse und beladen mit Mascaramasse.
• Die Fig. 4 zeigt ein zweites Ausführungsbeispiel einer erfindungsgemäßen Borste von vorn, d. h. in Draufsicht auf die Keilfläche.
• Die Fig. 4a zeigt einen Schnitt durch den Borstenschaft der Borste gem. Fig. 4, der unterhalb der Keilfläche entlang einer Ebene senkrecht zur Borstenlängsachse ausgeführt ist.
• Die Fig. 5 zeigt ein drittes Ausführungsbeispiel einer erfindungsgemäßen Borste von vorn, d. h. in Draufsicht auf die Keilfläche.
• Die Fig. 6 zeigt einen Schnitt durch die Borste gem. Fig. 5, der entlang einer Ebene senkrecht zur Borstenlängsachse ausgeführt ist.
• Die Fig. 7 zeigt ein weiteres, abgewandeltes Ausführungsbeispiel, das eng an das von den Fig. 1 bis 3 beschriebene Ausführungsbeispiel anlehnt.
• Die Fig. 8 zeigt eine Gesamtschau eines mit den erfindungsgemäßen Borsten bestückten Drahtkernapplikators.
• Die Fig. 9 zeigt die Ausrichtung der Anschnittfläche des Schräganschnitts, die so ausgerichtet ist, dass man bei Blick entlang der Applikatorlängsachse auf die Anschnittfläche schaut.
• Die Fig. 10 zeigt abermals die Ausrichtung der Anschnittfläche des Schräganschnitts, die so ausgerichtet ist, dass man bei Blick entlang der Applikatorlängsachse auf die Anschnittfläche schaut.
• Die Fig. 11 zeigt eine Variante der Erfindung mit wechselweise angespitzten und nicht angespitzten Borsten
• Die Fig. 12 zeigt eine Ausschnittvergrößerung aus Fig. 6
• Die Fig. 13 zeigt einen Ausschnitt der von Fig. 6 gezeigten Variante, frontal von vorne gesehen.
• Die Fig. 14 zeigt einen Ausschnitt einer zu den in den Fig. 11 und 12 dargestellten Borstenvariante alternativen Ausführungsform.

Further modes of action, advantages and design or modification options according to the invention result from the following description of some exemplary embodiments based on the figures.

• the 1 shows an exemplary embodiment of the bristle according to the invention from the front, ie in a top view of the cut surface which forms the desired wedge surface.
• the 2 shows a bristle according to the invention gem. 1 in side view of their wedge surface.
• the 3 show the 2 in section along the longitudinal axis of the bristles and loaded with mascara mass.
• the 4 shows a second exemplary embodiment of a bristle according to the invention from the front, ie in a plan view of the wedge surface.
• the Figure 4a shows a section through the bristle shaft of the bristle gem. 4 , which is carried out below the wedge surface along a plane perpendicular to the longitudinal axis of the bristles.
• the figure 5 shows a third exemplary embodiment of a bristle according to the invention from the front, ie in a plan view of the wedge surface.
• the 6 shows a section through the bristle acc. figure 5 , which runs along a plane perpendicular to the longitudinal axis of the bristles.
• the 7 shows another modified embodiment that closely resembles that of the Figures 1 to 3 described embodiment is based.
• the 8 shows an overall view of a wire core applicator fitted with the bristles according to the invention.
• the 9 Figure 12 shows the orientation of the bevel gate's gate surface, which is oriented to look at the gate surface when viewed along the applicator longitudinal axis.
• the 10 Figure 12 again shows the orientation of the bevel gate's gate surface, which is oriented to look at the gate surface when viewed along the longitudinal axis of the applicator.
• the 11 shows a variant of the invention with alternately pointed and non-pointed bristles
• the 12 shows an enlarged detail 6
• the 13 shows a section of the 6 variant shown, seen frontally from the front.
• the 14 shows a section of one of the in the 11 and 12 illustrated bristle variant alternative embodiment.

Such an applicator or such a mascara brush 18 as him / her 8 shows is usually produced in that between at least one wire clip 11 with two straight wire sections 12, 13, a plurality of initially mostly straight filaments is inserted. A filament in the context of the invention is preferably a section of an endlessly extruded fiber. As a rule, the filaments are inserted between the wire sections 12, 13 of the wire clamp 11 in such a way that they protrude to the same extent on both sides of the wire clamp 11 or its wire sections 12, 13 (preferably a maximum of +/-10%).

The wire sections 12, 13 are then twisted together, causing the filaments to disperse and eventually become firmly pinched between the wire sections. Each filament forms i. i.e. R. then two bristles 1 out. After twisting, the brush contour is cut with a milling cutter and counter-knife while the brush rotates in such a way that the large number of radially protruding bristles correspond exactly to a given brush body according to the drawing. Then, in a next step, the bristles are beveled according to the invention, mostly by grinding.

In this respect, only "different sides of one and the same coin" are addressed within the scope of this description, when the term "filament" is used on one occasion and the term "bristle" on another.

Figures 1 and 2 show the details of an embodiment of a bristle 1 according to the invention.

In this exemplary embodiment, the bristle has a circular cross-section and the bristle is hollow on the inside, preferably over its entire length up to its base-side anchoring point between the twisted wires, cf. 1 . The bristle thus forms a tube, the interior of which can receive and store mascara mass at least in the vicinity of its opening to the outside.

At its radially outward, free end, the bristle 1 has a bevel cut 3 in the manner of a simple wedge. This means that a first side of the relevant bristle, seen in the direction along the longitudinal axis L of the bristle, has a maximum length L _MAX and the second side diametrically opposite it has a minimum length _LMIN . One side of the bristle is longer than the side diametrically opposite it, cf. 2 .

In any case, the bristle is not only cut "a little" obliquely, but shows a clearly recognizable oblique cut 3. Preferably, the relationship α ≤ applies to the angle at which the cut surface 4 formed by the oblique cut 3 is inclined relative to the longitudinal axis L of the bristle 55° and ideally even α ≤ 35°. An additional bevel has a particularly advantageous effect on the slenderness of the wedge, with which an angle α ≤ 20° can be achieved.

In this way it is ensured that the incision area is large enough to achieve the effect intended by the invention, see again 2 .

Last but not least, this results in a very pronounced cut surface 4, which is preferably so long that it extends over at least 1/10, better still over at least 1/6, of the total length of a bristle. To put it another way, it can be said that for many applications it is particularly favorable to adhere to the following relationship: L _MAX ≤ L _MIN + ½ times the filament diameter to L _MIN + 2 times the filament diameter. With the said, additional bevel, this can be increased even further up to L _MAX ≤ L _MIN + 4 times the filament diameter - as with the one that is not drawn to scale in this respect figure 2 can be seen from the dimensioned cut face length AFL.

It should also be noted that the Figures 1 and 2 show an optional exemplary embodiment, the cut surface 4 of which is essentially flat, ie is flat in itself. Another embodiment, which is again clearly preferred for certain applications, is 7 represented figuratively.

This embodiment corresponds to that of the Figures 1 and 2 The embodiment shown is complete and differs therefrom only in that the cut surface 4 is curved convexly outwards, at least in some areas, mostly predominantly. Ideally, the cut surface is convexly curved (roughly in the manner of a pocket watch crystal) in two mutually perpendicular directions. Surprisingly, tests have shown that such a convex curvature again significantly improves the release of the stored mascara mass and the wetting of the eyelashes sliding past.

The effect achieved with the invention can best be based on the 3 explain. The mascara mass shown here in black penetrates completely or at least a little into the hollow bristle core 5 and is stored there. If the bristles are moved or bent, e.g. B. when it passes through the wiper and / or in the course of the actual application, a certain overpressure arises in the hollow bristle core, which in any case pushes out the mascara mass stored in the vicinity of the mouth somewhat outwards, so that the mascara mass is ready for delivery to the eyelashes .

The area on which the mascara mass is available for delivery to the eyelashes is now substantially increased by the inclined cut 3 according to the invention with its cut surface 4, which 3 makes clearly recognizable.

In addition, the cutting surface 4 can come into better contact with the eyelashes (usually longer and more intensively) than a small end surface running approximately perpendicular to the longitudinal axis L of the bristles. Because such a small forehead is harder for the eyelashes to hit and when an eyelash has laid on this small forehead, then the further movement of the eyelashes inward in the direction of the trimming is impeded, so that a tension builds up that causes the eyelashes to jump off the small forehead, often before a large part of the mascara mass available at the bristle mouth can be delivered to them. This is different with the bristles designed according to the invention. Here the movement of the eyelashes W in the inward direction of the trimming is not significantly impeded. Instead, the eyelashes W can gradually slide along the large cut surface 4 in the direction inward of the stocking and intensively absorb the mascara mass. This improves the loading of the lashes with mascara mass and at the same time improves the ability of the bristles to penetrate between the lashes.

If you turn again 1 then you will find the bristle outer diameter 9 drawn in there, which should preferably be at least 115 μm and even better at least 215 μm for circular bristles.

You can also find in 1 the wall thickness 7 of the bristles according to the invention is drawn in, which should preferably be between 15 μm and 100 μm, inclusive in each case.

With view on 2 It is also noteworthy that the cut surface 4 preferably does not merge into the outer peripheral surface of the bristle with a sharp edge, but with the formation of a rounding, which of course does not have to be circular.

Preferably, the bevel cut is not made by correspondingly oblique cutting when cutting the continuous thread into individual filaments, but by grinding the radially outward ends of the bristles, the held between the wire sections already twisted together.

In this way, with appropriate movement and positioning of the grinding wheel relative to the bristle to be ground, the preferred embodiment can be implemented in which the cut surfaces 4 of the inclined cuts 3 are aligned in such a way that when you look along the longitudinal axis LD of the wire core or the brush as a whole looks at her. This considerably improves the contact between the eyelashes and the bristles, because the cutting surfaces 4 then present themselves with a maximum area, seen in the direction in which the eyelashes move relative to the bristles.

The angle at which the grinding wheel must be held and moved relative to the brush for this purpose cannot be generally defined numerically due to the strong dependence on the stiffness and length of the bristles actually used find out what bristles he is using once he has been instructed on what he is supposed to achieve systematically.

the 4 Fig. 12 shows a second embodiment which is a modification of the first embodiment. The only difference is that the bristle according to the invention is slotted in the direction of the longitudinal axis of the bristle in this exemplary embodiment.

The slot is preferably carried out like the Figure 4a illustrated. The slit is then designed in such a way that it "gaps", ie the edges of the slit do not touch one another when the bristle is not under load, so that the free cross-section of the slit is practically zero. About it moreover, the slit is preferably designed to occupy between 7% and 21% of the total area of the wall cross-section that an identical but unslit bristle has. These specifications for the slot also apply to bristles with a non-round cross-section.

For bristles with a round cross-section, the cut-out angle β describing the slit preferably satisfies the following relationship: 15°≦β≦50°β.

The slit described is the result of the use of filaments slit end-to-end along the length. These filaments are of course "squashed" in the area of their nip between the twisted wire sections so that they form bristles which are slotted from their radially outward end to the nip area between the twisted wire sections.

The slit has the advantage that the bristles tend to be more easily deformed, so that even the low forces occurring during the actual application can be sufficient to deform the bristles in such a way that the mascara mass initially stored in their hollow bristle core 5 passes through the mouth at the cut surface 4 and/or the slit 8 emerges to the outside and is then available there for absorption by the eyelashes.

the figure 5 shows a third embodiment, which is a modification of the embodiment examples described above in the form of bristles with a circular cross-section. The only difference is that the bristle according to the invention in this exemplary embodiment is not round but non-round or preferably has a polygonal or quadrangular, ideally square, cross-section.

Therefore, what was said above for the other exemplary embodiments also applies to this exemplary embodiment, unless something else is defined precisely because of its non-round cross section.

The crucial point is that bristles with a non-round cross-section are in many cases much more suitable for the implementation of the invention than bristles with a round cross-section. Because in the case of bristles with a non-round cross-section, the bristles can be given a so-called preferred direction, i. H. a direction in which the bristles have an increased bending stiffness. The preferred direction can be linked to the cut 3 in such a way that the forces that arise on the wedge surface and tend to "bend the bristles aside" are absorbed particularly well, so that the bristles do not give way prematurely, but rather long and intensively with the force against the cut surface 4 adjacent eyelash remains in contact.

What has just been said applies even more when the bristle is slit in the direction of the longitudinal axis, because then the non-slit surfaces adjoining the slit surface can be dimensioned in such a way that the weakening effect of the slit can be compensated to the same extent as that appears necessary in individual cases in order to achieve an optimal application result.

In addition, it is particularly advantageous for a whole range of applications - specifically those in which slotted filaments are used - not only to have a non-round bristle cross-section to choose, but polygonal or so that it has kinks. In particular, it is made rectangular.

How to be good at using the figure 5 can understand, such a cross-section, in which the wall of the bristle has kinks, leads to a stabilization of the bristle, similar to what is achieved by beads or folds in a metal sheet. In this way too an excessive weakening of the bristle by the slit can be avoided. This means that on the one hand the bristles can "work" or deform, not least under the influence of the forces occurring during application, in such a way that the mascara mass stored in the core of the bristle is released to the outside, but on the other hand it is reliably avoided that the bristle is regularly so overloaded during the application that it collapses or buckles due to the slit and is then no longer able to make any further really meaningful contribution to the make-up result, but instead begins to "smear" until it has straightened up again after the overload has ended .

the 6 FIG. 12 illustrates some characteristics of this embodiment according to FIG figure 5 . The enveloping circle shown in dot-dash lines, which envelops the outer circumference of the bristle profile, can be seen here. The diameter of the bristle profile is preferably chosen such that the following applies to the enveloping circle diameter 9*: 9*≧100 μm and better 9*≧200 μm.

In contrast, the same applies to the wall thickness 7 as to the bristles with a circular cross-section. Finally, it should be noted that the bristles of the applicators according to the invention consist entirely of hollow filaments. For others, mostly For more specific applications, a mix of the hollow filaments according to the invention and solid, preferably equally ground filaments is preferred, with the hollow filaments usually being in the majority.

the 11, 12 and 13 illustrate a variant of the mascara brush according to the invention with an extremely advantageous application and separation effect.

As can be seen, the bristles here consist of bristles 1a formed by filaments with a bevel cut, as described above, and of other bristles 1b, also formed of filaments, without a bevel cut.

The bristle facing is designed in such a way that the bristles 1a with a bevel cut form a plurality of sectors 100 of the set of bristles and the other bristles 1b form a further sector 101 . In the example shown in the figure, the sectors and the further sectors in the circumferential direction finally follow one another in a repeating, alternating pattern.

The number of sectors depends on the individual application and the rheological properties of the cosmetic used. Preferably there are between 1 to 8 sectors and between 1 to 8 other sectors.

Alternatively, there is the possibility that the filaments or bristles with a bevel cut are arranged in the bristle facing that otherwise consists of other filaments so that they form a path running spirally on the peripheral surface of the bristle facing, which is not shown here in the figures.

Ideally, the other filaments are made of the same material as the filaments with the bevel cut.

In another variant, also according to the invention and therefore claimed, of the mascara applicator previously explained with reference to the figures, the trimming is designed in such a way that the inclined surfaces of the filaments with a bevel cut, neglecting their wedge or bevel angle, are perpendicular to the course of the imaginary longitudinal axis of the spiral track are aligned.

the 14 illustrates a variant of the mascara brush according to the invention with an extremely advantageous application and separation effect.

As can be seen, the bristle facing 26 consists of bristles 1a, 1c formed by filaments with a wedge-shaped point and other bristles 1b also formed from filaments without a wedge-shaped point, with the bristles 1a, 1c differing only with regard to the orientation of their cut surface 4. The cut face 4 of each of the bristles 1a faces the brush end 16 and the cut face 4 of each of the bristles 1c faces the brush tip 15.

The bristle stock 26 is designed in such a way that the bristles 1a with wedge-shaped taper arranged adjacent to several in a row of bristles 17 form a sector 100 of the bristle stock 26, the bristles 1c with wedge-shaped taper arranged adjacent to several in a row of bristles 17' form a sector 102 of the bristle stock 26 form, and the further bristles 1b arranged in a row of bristles 17'' form a further sector 101 of the bristle stock 26. In the case of the figured in 14 shown For example, the sectors 100 and 102 and the further sector 101 follow one another alternately in the circumferential direction. Sector 102 is again followed by a sector 101. The sequence of sectors continues until a 360° circular arc is closed over the circumference of the bristle facing 26 .

The number of sectors depends on the individual application and the rheological properties of the cosmetic used. Preferably between 1 to 8 sectors 100, 102 and between 1 to 8 further sectors 101 are present.

Alternatively, there is the possibility that the filaments or bristles 1a, 1c with a wedge-shaped tip are arranged in the bristle stock 26, which otherwise consists of further filaments or bristles 1, 1b, so that they form a path running spirally on the peripheral surface of the bristle stock 26, which is shown here is not shown figuratively.

Ideally, the other filaments or bristles 1b are made of the same material as the filaments or bristles 1a, 1c with a wedge-shaped tip.

In another variant of the mascara applicator that is also according to the invention and is therefore claimed, the bristles are designed in such a way that the chisel surfaces of the filaments or bristles with a wedge-shaped tip, neglecting their wedge angle, are aligned perpendicular to the course of the imaginary longitudinal axis of the spiral path are.

While in the embodiment according to the 14 all the bristles 1a, 1b, 1c of a respective row of bristles 17, 17', 17" are of the same design with regard to the formation of the bristle tip, a row of bristles can of course also be made of Bristles may be formed, each having differently designed bristle tips. It is thus possible for bristles 1a, 1b, 1c to be formed next to one another and adjacent to one another in a row of bristles, which are arranged in a recurring pattern relative to one another, with the pattern forming a sector, a region or a zone. All conceivable combinations are executable. Sectors, areas or zones can also run spirally over the circumference of the bristle facing 26 or be arranged, formed and aligned to run in the longitudinal direction of the longitudinal axis LD of the wire core.

Reference List

1

bristle

1a, 1c

Bristles that are pointed in a wedge shape (variant)

2 1b

Bristles that are not wedge-shaped (variant) bristle shaft

3

bevel cut

4

bleed surface

5

Bristle core, hollow

6

bristle coat

7

wall thickness of the bristle coat

8th

slot

9

bristle outer diameter

9*

enveloping circle diameter

10

bristle length

11

wire clip

12

First wire section of wire clip

13

Second wire section of wire clip

100, 102...

Sectors of bristles pointed in a wedge shape

101

Sectors of bristles that are not wedge-shaped

a

wedge angle

β

opening angle of the slot

L

longitudinal axis of the bristles

LD

Longitudinal axis of the wire core

LMAX

maximum length extension

LMIN

minimal length extension

AFL

face length

W

eyelash

M

mascara mass

Claims (15)

1. A mascara brush comprising an inner core of at least two wire portions (12, 13) twisted together, and a bristle covering (26) of bristles (1) formed by internally hollow filaments that are each held clamped between the two wire portions, characterized in that the radially outward free ends of the bristles have an oblique cut (3) like a simple wedge, so that a first side of said bristle has a maximum longitudinal extent (L_MAX) and the second side diametrically opposite to the first side has a minimum longitudinal extent (L_MIN), and that the corners of the radially outward bristle tips are rounded.
2. A mascara brush comprising an inner core of at least two wire portions (12, 13) twisted together along a longitudinal wire core axis (LD), and a bristle covering (26) of bristles (1) of plastic formed by filaments that are each held clamped between the two wire portions (12, 13) and that are configured at their free ends with a wedge-shaped or without a wedge-shaped bristle tip, wherein the bristles, in particular at least partially, are formed by internally hollow filaments, characterized in that, in particular at least, the bristles that are internally hollow have at their radially outward free ends an oblique cut (3) like a simple wedge and a wedge-shaped bristle tip with at least one cut face (4) forming a wedge, and that the corners of the radially outward bristle tips are rounded.
3. The mascara brush according to claim 1 or 2, characterized in that the cut faces (4) of the bristles (1) are, in part, orientated in a direction towards the brush end (16) and, in part, towards the brush tip (15).
4. The mascara brush according to one of the preceding claims, characterized in that the bristle covering has a plurality of areas, sectors or zones (100, 102), which are orientated to extend, in the circumferential direction of the bristle covering (26), transversely, in particular perpendicularly, to the longitudinal wire core axis (LD), or, in the circumferential direction of the bristle covering (26), spiral-shaped to the longitudinal wire core axis (LD), or, in the longitudinal direction of the bristle covering (26), alongside, in particular parallel, to the longitudinal wire core axis (LD), and which respectively comprise at least one bristle row (17, 17') consisting of a plurality of adjacent bristles (1a, 1c) that each have an identically configured bristle tip, or are formed by such a bristle row (17, 17'), and which, in the circumferential direction and/or in the longitudinal direction of the bristle covering, are respectively disposed adjacent to one area or sector or zone (101) which comprises a plurality of bristles (1b) each having a differently configured bristle tip.
5. The mascara brush according to one of the preceding claims, characterized in that the bristle covering (26) has a plurality of areas, sectors or zones, which are orientated to extend, in the circumferential direction of the bristle covering (26), transversely, in particular perpendicularly, to the longitudinal wire core axis (LD), or, in the circumferential direction of the bristle covering (26), spiral-shaped to the longitudinal wire core axis (LD), or, in the longitudinal direction of the bristle covering (26), alongside, in particular parallel, to the longitudinal wire core axis (LD), and which respectively comprise at least one bristle row which consists of a plurality of adjacent bristles (1) each having a differently configured bristle tip.
6. The mascara brush (18) according to claim 4 or 5, characterized in that the plurality of areas, sectors or zones (100, 101, 102), in the circumferential direction, transversely or longitudinally to the longitudinal wire core axis (LD), sweep over the circumference or a partial area of the circumference of the bristle covering (26) once.
7. The mascara brush (18) according to one of the preceding claims, characterized in that the bristle covering (26) consists of bristles (1a, 1c, 1d, 1e, 1f) or filaments (1') with a wedge-shaped pointed portion and of further bristles (1b) or filaments (1') without a wedge-shaped pointed portion, wherein the bristle covering (26) is preferably designed such that the bristles (1a, 1c, 1d, 1e, 1f) or filaments (1') with a wedge-shaped pointed portion form one or more sector(s) (100, 102) of the bristle covering (26) and the further bristles (1b) or filaments (1') form one or more further sector(s) (101), wherein the sector(s) (100, 102) and the further sector(s) (101) preferably follow each other alternately in the circumferential direction.
8. The mascara brush (18) according to claim 7, characterized in that the bristles (1a, 1c, 1d, 1e, 1f) or filaments (1') with a wedge-shaped pointed portion are disposed in such a way in the bristle covering (26) that otherwise consists of further bristles (1b) or filaments (1') that they form a track extending in a spiral shape on a circumferential enveloping surface of the bristle covering (26).
9. The mascara brush (18) according to one of claims 6 to 8, characterized in that the further bristles (1b) or filaments (1') are made of the same material as the bristles (1a, 1c, 1d, 1e, 1f) or filaments (1') with a wedge-shaped pointed portion.
10. The mascara brush (18) according to claim 8 or 9, characterized in that the chisel faces (4a) of the bristles (1a, 1c, 1d, 1e, 1f) or filaments (1') with a wedge-shaped pointed portion, neglecting their wedge angel, are orientated perpendicularly to a course of an imaginary longitudinal axis of the spiral-shaped track.
11. The mascara brush (18) according to one of the preceding claims, characterized in that an area or a zone or a sector sweeps over an angular distance that constitutes ⅛ to 1/64 of the 360° circumference or of the 360° enveloping circle of the bristle covering.
12. The mascara brush (18) according to one of the preceding claims, characterized in that an area or a sector or a zone in which the cut faces (4) of all bristles are orientated to point in a direction towards the brush tip (15), and an area or a sector or a zone in which the cut faces (4) of all bristles are orientated to point in a direction towards the brush end, are configured respectively alternately.
13. The mascara brush according to one of the preceding claims, characterized in that the filaments (1) are slit along their length and/or that the bristles or filaments are tube-shaped and internally hollow, as well as continuously slit in a direction along their longitudinal axis.
14. The mascara brush according to one of the preceding claims, characterized in that the angle (α) by which the cut face (4) formed by the oblique cut (3) is inclined relative to the longitudinal bristle axis (L), satisfies the relationship α ≤ 55° and preferably even α ≤ 35° and ideally α ≤ 20°, wherein the mascara brush in the latter case preferably has been sharpened twice in succession, in two consecutive operations.
15. The mascara brush according to one of the preceding claims, characterized in that the oblique cuts (3) forming the simple wedge are orientated to the longitudinal axis (LD) of the wire core such that the oblique cuts are visible when viewed along the longitudinal axis.

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