WO2013132110A1

WO2013132110A1 - Twisted brush comprising parallel bristles at the distal end

Info

Publication number: WO2013132110A1
Application number: PCT/EP2013/054911
Authority: WO
Inventors: Benjamin Kohlmann
Original assignee: Geka Gmbh
Priority date: 2012-03-09
Filing date: 2013-03-11
Publication date: 2013-09-12
Also published as: DE202012002307U1; US20150033489A1; EP2822421A1

Abstract

A wire core brush comprising a core consisting of at least two wires twisted together, between which bristle-forming elements are held, which form bristles projecting from the core, characterised in that the wire core brush has been produced such that, after the twisting, it has first bristles projecting substantially in a radial direction having a first length and also has second bristles projecting substantially in a radial direction having a second length which is greater than the first length such that the second bristles project in a substantially radial direction beyond the first bristles, whereupon the brush has been drawn through a hot tube, the inner diameter and temperature of which have been selected and attuned to the residence time of the brush in the tube in such a manner that a section of the second bristles is permanently aligned substantially parallel to the longitudinal axis of the wire core.

Description

Drilled brush with bristles parallel to the distal end

The invention relates to a wire core brush according to the preamble of claim 1.

Wire core brushes have long been state of the art in a wide variety of designs.

Wire core brushes are produced by inserting a number of bristle-forming elements between at least two wires that are initially still parallel to one another, usually in the form of filaments, ie. in the form of fiber sections with a length as a rule defined. Then the wires are twisted together, whereby the filaments are clamped between the wires and permanently held. Typically, the filaments are held approximately midway between the wires twisted together so that each filament forms two bristles that protrude outwardly from the wire core. As a rule, the filaments are clamped in tufts between the twisted wires, so that each tuft of filaments forms two bristle tufts.

Wire core brushes are used for a wide variety of purposes and accordingly produced in very different sizes. Protection is claimed for all types and sizes of wire core brushes using the invention described below. Preferably, however, protection is claimed for cosmetic brushes and hair dye brushes, and in particular for brushes for applying mascara mass to the eyelashes of the eyelid.

Core wire brushes usually have bristles that protrude more or less in the radial direction. The application properties are then determined significantly by the density of the bristle stock, the length of the bristles and the bristle geometry.

In contrast, it is the object of the invention to provide a wire core brush, the at least in one area a noticeably different Ordering behavior, as known in the prior art wire core brush.

This object is achieved with the features of claim 1.

The claim 1 proposes a wire core brush whose bristle stock has received its special application properties by the special treatment of the wire core brush.

The wire core brush according to the invention consists of a core consisting of at least two wires twisted together, wherein bristle-forming elements, preferably in the form of filaments, which form bristles projecting from the core are held between the wires. In order to give the brush its particular application properties, it has been made to have, after twisting, first bristles projecting from the core having a first length and additionally having second bristles projecting from the core and having a second length greater than the first Length, so that the second bristles are seen in the direction perpendicular to the core beyond the first bristles addition. Subsequently, the brush was subjected to a further treatment in which a portion of the second bristles constituting about 30% to 60% of the total length of the second bristles was permanently bent. In many cases, this is done by pulling the brush through a hot tube whose inside diameter and temperature are chosen and tuned to the residence time of the brush in the tube, that part of the tube protruding beyond the first bristles in the direction perpendicular to the core second bristles is permanently aligned substantially parallel to the longitudinal axis of the wire core. In this way, one obtains bristles, whose near the core located first portion is aligned, as usual in wire core brushes, while the core facing away from the second portion of the bristles is aligned substantially parallel to the longitudinal axis of the wire core. It is clear that such, in itself by preferably 90 ° +/- 25 °, better still by 90 ° +/- 15 ° angled bristles show a significantly different order behavior than the conventional, more or less straight or more or less continuously curved bristles of the known wire core brushes. The inner diameter of the tube as well as its temperature and the residence time of the brush in the hot tube are chosen so that the second longer bristles become locally soft, in an intermediate region, so as to be permanently plastically deformed and thereby pass through the tube be folded over that their over the first shorter bristles protruding area is oriented substantially parallel to the longitudinal axis of the wire core. The concrete diameter and temperature values of the tube and the residence time of the brush in the tube or the speed at which the brush is pulled continuously through the tube depend on the individual case and can not be generally determined in advance. However, the concrete values for the diameter, the temperature and the residence time or the speed can be easily determined by conventional tests depending on the bristle material selected for the brush.

Ideally, it is ensured that the second bristles become so hot within a quarter of their length that the material of the bristles deforms here permanently plastically. In other words, the second bristles are not heated to such an extent over their predominant length that they permanently deform plastically.

The inner diameter of the tube, its temperature and the residence time of the brush or the speed are preferably selected so that the first bristles of shorter length are not or not significantly affected by the hot tube, with particular care being taken to ensure that The tips of these bristles are not melted and possibly form thickenings in the manner of a bead. If only the orientation of the first bristles changes slightly as the brush passes through the hot tube, for example, in which these bristles tend to tilt in one direction with respect to their original orientation by up to 15 °, preferably only by up to 10 ° This is of course no better for the purposes of the invention. It is more natural, of course, if the parameters are chosen such that the first bristles are not visibly influenced. For the latter purpose, the inner diameter of the hot tube is preferably chosen to be so generous that it is larger than the outer diameter of the bristle lining formed by the first, shorter bristles.

The inventively required different lengths of the bristles can be achieved by using filaments of different lengths, or by a subsequent trimming of the bristle trim, following the twisting of the wires.

In addition to the task mentioned above, there is always the task to be solved to prevent the so-called "blobb." By this is meant the phenomenon that when pulling out a mascara bust excess mascara mass accumulates in the region of the distal tip and the area around the scraper seals so that as the mascara applicator continues to pull out of its reservoir it creates an oppression in it which abruptly collapses as soon as the mascara applicator has completely passed the scraper, creating the undesirable "blopping noise" and there is a risk that there is a spattering of mascara. This object is achieved by a wire core brush having a core consisting of at least two wires twisted together, with bristle-forming elements, preferably in the form of filaments, forming bristles projecting from the core between the wires, and at least some of the bristles comprising two sections a first portion extending straight or substantially rectilinearly from the wire core at an angle of 50 ° to 90 ° and more preferably 70 ° to 90 ° relative to the longitudinal axis defined by the wire core, and a second portion which is predominantly parallel to the longitudinal axis of the wire core, wherein the first and the second portion are connected to each other via a sharply curved intermediate portion, namely a portion within which the longitudinal axis of a bristle changes its direction by an angle ß of 40 ° to 90 ° and whose length is less than 1/4 and preferably less than 1/6 the total length of the respective bristle makes. The total length of a bristle is understood to be the length of a bristle between its root, ie its clamping between the wires, and its end facing away from the root end. A section of a Bristle is essentially straightforward in the sense of this description if its local radius of curvature outside the root is greater than or equal to 3 mm and preferably greater than or equal to 6 mm.

It is particularly advantageous if only part of the bristle lining of the wire core brush consists of such angled bristles. Ideally, this part of the bristle trim is the one with which the distal, i. the handle side remote end of the wire core brush is busy. It is particularly advantageous if such bristles make up about 1/8 to about 1/4 of the length of the entire bristle facing at the distal end of the bristle facing.

Surprisingly, the bristles not projecting substantially at right angles to the wire core and extending approximately parallel to the wire core prevent the accumulation of mascara mass causing the "blobb" in the region of the distal end of the applicator, or they reduce the tendency that it comes to this, at least considerably.

Ideally, at least part of the bristles aligned parallel to the longitudinal axis of the wire core projects beyond the distal end of the wire core brush and in this way forms organs with the aid of which, in a special manner, preferably in the manner of a brush, a substance can be applied or with their help a combing effect can be realized, such as in the case of an applicator for mascara mass combing the eyelashes.

According to the invention, filaments are preferably used to form the bristles, which consist of a thermoformable plastic. The diameter of the preferably circular or at least substantially round filaments is preferably between 0.08 mm and 0.6 mm and ideally between 0.1 mm and 0.4 mm.

Preferably, wires are used which have a diameter between 0.5 mm and 1.1 mm prior to twisting.

Further effects, advantages and design options result from the exemplary embodiment described with reference to FIGS.

Show it:

1 shows a side view of an embodiment of the wire core brushes according to the invention.

Figure 2 is a perspective view of the embodiment shown in Figure 1;

Figure 3 is a side view of a blank for making the embodiment shown in Figure 1, the second bristles of which have not yet been heat treated;

Figure 4 shows the blank shown in Figure 3 as it passes through the heated tube used to hot-work the second bristles;

Figure 5 shows a section of the leading edge of the heated tube of Figure 4 at the moment when the last of the first bristles has been inserted into the tube and the first of the second bristles is about to be inserted into the tube.

FIG. 1 shows an exemplary embodiment in the form of a mascara applicator for applying mascara mass to the eyelashes.

Such a Mascaraapplikator 1 is relatively small, the diameter D of its bristle field is preferably in the range of 3 mm to 8 mm. Seen in the longitudinal direction L along the wire core, the bristle stock of the mascara applicator preferably has a length LA between 15 mm and 40 mm. In Figure 1 on the left side, a portion of the wire core is seen, which carries no bristles and which serves to attach the applicator to a handle or a handle connected to the handle.

The Mascaraapplikator has a wire core 2 of at least two wires twisted together. The wires hold between bristles forming elements or filaments clamped, which usually on both sides protrude out of the wire core and form two bristles in this way.

The entirety of the bristles preferably forms a helical-line configuration, as shown in FIG. In this case, this helical configuration need not be so clearly pronounced as that drawn in FIG.

As can be seen very well with reference to FIG. 1, the bristle field is formed about 3/4 of its length exclusively by first bristles 3. Preferably, except for individual exceptions, all bristles 3 are all or at least predominantly substantially radially remote from the wire core 2, specifically over their entire length. This means preferably that all or the vast majority of these first bristles with the longitudinal axis L of the wire core at an angle of 90 ° +/- 25 ° and better still include an angle of 90 ° +/- 15 °. FIG. 1 shows the situation that the first bristles have remained completely unaffected by the heat treatment of the second bristles. This is advantageous, but not necessarily the case. A slight inclination of the first bristles, in the example shown in FIG. 1 on average, for example, by approximately 5 ° to the right, is tolerable as a side effect of the heat treatment of the second bristles.

Less than the last, distal, i. The side of the later handle facing away, quarter of the bristle trim consists of second bristles, which are recognizable have a greater length than the first bristles. In other preferred embodiments, it is even the case that only the two or even only one turn lying at the very distal end is occupied by such second bristles.

Special feature of these second bristles is their course. As can be seen, these bristles consist essentially of two sections 5 and 7 extending in different directions, which are connected to one another via an intermediate section 6.

In their first, the wire core near section 5, these second bristles run in principle as well as the first bristles. In In fact, the first bristles of the first bristle are also substantially radially remote from the wire core 2, the term "radially protruding" being defined just as for bristles. The second, wire core facing away portion 7 of these second bristles is oriented so that the longitudinal axis of this section is substantially parallel to the longitudinal axis L of the wire core. From a substantially parallel course can be spoken in any case, if the course of the longitudinal axis of the bristle in this second section deviates by less than 10 ° from the course of the longitudinal axis L of the wire core.

The first section 5 and the second section 7 of each second bristle are, as can be seen quite well from FIG. 1, connected to one another by an intermediate section 6. In this intermediate section 6, the bristle is sharply curved, while in the other sections it is essentially rectilinear, in the sense already defined above.

The length of this intermediate section 6 is less than 1/4 of the total length of the respective second bristle. Within this intermediate portion, the second bristle is angled in this embodiment by about 90 ° +/- 5 °.

It can be clearly seen from FIG. 1 that the second sections of the second bristles oriented substantially parallel to the longitudinal axis L of the wire core protrude beyond the distal end of the wire core, preferably by at least 2 mm, more preferably by at least 3 mm. Due to this, these bristles can be used in the manner of a brush. Preferably, such that the area bounded by the bristles central area receives a supply of the mass to be applied, which is discharged again as soon as the bristles projecting beyond the distal end of the wire core brush-like over the surface to be treated is painted.

Alternatively, these bristles may be used in the manner of a comb, which may be used, for example, to separate adherent eyelashes from each other. It can also be seen from FIG. 1 that the ends of the second bristles projecting beyond the distal side of the applicator have preferably been cut. This can be seen from the fact that they all end in the same circle. The fact that the bristles have been trimmed, in particular in comparison with the figure 3 clearly visible.

FIG. 3 shows a blank for producing the wire core brushes according to the invention in the form of the mascara applicator. The wire core has been fitted in this embodiment initially with filaments, all of which had the same length, so that initially resulted in a brush blank with all the same length bristles.

In the next step, the brush blank has been trimmed to have the shape shown in Figure 3 by having shorter first bristles 3 and longer second bristles 4. The longer bristles 4 are not yet heat treated at the stage shown in Figure 3 been exposed.

Alternatively, one can do without such trimming, if one feeds the wires to be twisted together from the outset with different lengths of filaments. Another alternative is the advanced technique in which the twisting motion associated with twisting is used to trim the bristle stock while twisting.

Figure 4 illustrates the next step, namely the manner in which the second bristles 4 receive their orientation.

For this purpose, a heated tube 8 is preferably used, is pulled through the hollow interior of the blank of the brush. As indicated in FIG. 4, the first bristles can pass through the interior of the tube completely or substantially unhindered and are therefore not or not significantly influenced by the heat of the heated tube.

The inner diameter of the tube is dimensioned so that the second bristles first come into contact with the end face 9 of the tube and inevitably be bent as soon as the area in which the second bristles are provided, enters the heated tube.

As the excerpt may clarify, the figure 5 shows in a very simplified representation, the second bristles come locally very intense with the heated tube at the end face 9 or in the region of which, the insertion of the brush facilitating, insertion 10 in contact and are therefore locally heated to the extent that they can be plastically deformed permanently. Once the bristles have been bent once, the part of these second bristles, which only now, in the already bent state enters the tube, much less intense with the hot tube wall in contact and is therefore not heated excessively. As a result, the second bristles in the intermediate region 6, approximately at the level of the outer diameter at which the first bristles terminate, are sharply bent, while the relatively long end of the second bristles, which initially stood far beyond the diameter, abuts the first bristles end, remains largely straight and is thereby oriented so that its longitudinal axis is substantially parallel to the longitudinal axis of the wire core.

At which point the sharply bending intermediate region 6 is formed, can be adjusted by suitable dimensioning of the inner diameter of the heated tube. If the inner diameter of the tube is smaller than the outer diameter of the portion of the bristle facing which is predetermined by the first bristles, then the intermediate area 6 is at least predominantly in the range of a diameter which is smaller than the maximum outer diameter of the bristle facing predetermined by the first bristles becomes. If the inner diameter of the tube is greater than the outer diameter of the portion of the bristle facing which is predetermined by the first bristles, then the intermediate region 6 forms at least predominantly in the region of a diameter which is greater than the maximum outer diameter of the bristle facing, which passes through the first bristles is given.

Ideally, the inner diameter of the heated tube is selected (namely, preferably 10% to 25% smaller than the maximum outer diameter). ßendurchmesser of the predetermined by the first bristles Besatzabschnitts), that the folded and thus substantially parallel to the longitudinal axis of the wire core extending region of the second bristles is located on a diameter which substantially corresponds to the maximum outer diameter of the portion of the bristle facing, by the first bristles is formed. In this way, a brush is obtained with a continuous cylindrical outer contour, or different stocking areas, which merge into each other substantially without a diameter jump.

It should also be noted that the heated tube is preferably not in one piece, but consists of at least two tube half shells, between which the brush to be treated is used so that immediately after the joining of the two half shells of the stocking region, which consists of the first bristles, substantially Fully enclosed by the pipe. Now the brush can be pulled through the tube immediately, whereupon immediately the second bristles to be treated are "relocated" with no appreciable time delay, such a tube substantially simplifying the manufacturing process which eliminates the need for the brush to be incorporated therein Thread closed pipe and for a long time only pull through the bristle stock formed by the first bristles through the pipe (and expose the heat), until it finally comes to flipping the second bristles.

Mascara applicator

wire core

first bristles

second bristles

first section

Intermediate region of the second bristles second section of the second bristles heated tube

Front side of the heated pipe

Insertion slope of the heated pipe

Claims

claims

Wire core brush comprising a core (2) consisting of at least two wires twisted together, between which bristle-forming elements are formed, which form bristles projecting from the core, characterized in that the wire core brush has been made substantially radial after twisting Direction projecting first bristles

(3) having a first length (LI) and in addition substantially radially projecting second bristles (4) having a second length (L2) which is greater than the first length (LI), so that the second bristles (4 ) in a substantially radial direction beyond the first bristles, whereupon the brush has been drawn through a hot tube (8) whose inner diameter and temperature are so selected and tuned to the residence time of the brush in the tube that a portion

(7) the second bristle (4) is permanently aligned substantially parallel to the longitudinal axis (L) of the wire core (2);

Core wire brush comprising a core (2) consisting of at least two wires twisted together, between which bristle-forming elements are formed which form bristles projecting from the core (2), characterized in that some of the bristles have two sections (5, 7), namely a first portion (5) projecting from the core (2) at an angle of 50 ° to 90 °, and more preferably 70 ° to 90 °, and a second portion (7) substantially parallel to the longitudinal axis (L) the core extends, wherein the first and the second portion (5, 7) via a sharply curved intermediate portion (6) are interconnected within which the longitudinal axis of the bristle changes its direction by an angle ß of 40 ° to 90 ° and the less is 1/5 and preferably less than 1/8 of the total length of the bristles, ie the length of the bristle between its root and its end facing away from the root end;

3. wire core brush according to claim 2, characterized in that the inner diameter and temperature of the tube (8) are selected and tuned to the residence time of the brush in the tube that the first bristles (3) are not or not significantly deformed;

4. Wire core brush according to one of the preceding claims, characterized in that the second bristles (4) having a bristle portion (7) which extends substantially parallel to the longitudinal axis (L) of the core, the distal outermost quarter and preferably the distal outermost fifth form of boron ^¬ tehbesatzes;

5. Wire core brush according to one of the preceding claims, characterized in that the second bristles (4) having a bristle portion (7) which extends substantially parallel to the longitudinal axis (1) of the core, in the direction of the longitudinal ^¬ axis of the core over protrude the remaining bristle trim;

6. Wire core brush according to one of the preceding claims, characterized in that the bristles (3, 4) have a ^{diam ¬} ser of 0.08 mm to 0.3 mm and preferably a diameter of 0.1 mm to 0.25 mm;

A wire core brush according to any one of the preceding claims, characterized in that each of the wires twisted to the wire core (2) has a diameter between 0.5 and 1.1 mm before twisting.

8. wire core brush according to one of the preceding claims, characterized in that the bristle stock of 15 to 50 filaments and preferably from 20 to 30 filaments per Win ^¬ tion is formed.

9. A method of making a brush comprising the steps of:

Producing a wire-core brush with a bristle stocking of essentially different first and second th bristles (3, 4),

Locally heating the second bristles (4) such that they become plastically deformable in this area

• transferring the sections of the second bristles projecting beyond the imaginary envelope into a position in which the longitudinal axis of these sections runs essentially parallel to the longitudinal axis of the wire core.