EP0444436B1 - Treatment of bristles - Google Patents

Abstract

The brush bristle active ends processing starts with forming bristle tights and clamping them at a distance from the active ends. After cutting to size, the active ends are ground. The grinding is carried out by a surface, orthogonal to the bristle extension, whose all points move on circular tracks of identical dia. The bristle compression against the grinding surface is variable, and the bristles are supported at a variable spacing.

Description

The invention relates to a method according to the preamble of claim 1. Furthermore, the invention is directed to a device according to the preamble of claim 10.

In the case of a large number of brushes with plastic bristles, in particular if they are used in the human field, e.g. Toothbrushes, hand brushes, massage brushes or the like, the bristle ends with sharp edges due to the cutting process must be reworked, in particular rounded. Furthermore, in many cases it is desirable for the desired effect of a brush to design the bristles on their jacket, in particular in the area immediately adjacent to the end on the use side, differently than to reduce the diameter over the remaining bristle length, for example roughening towards the end the like.

A large number of processes are known for the above-mentioned machining processes, which can be differentiated into thermal, chemical and mechanical processes. In the thermal process, the bristle ends brought to melting temperature either directly by heat (US-A-2 426 328) or by laser beams (EP-A-0 321 938) and the melt bead formed on each bristle is treated in a suitable manner in order to obtain a rounding at the bristle end. In a combined chemical-physical process for the production of bristles that taper towards the end, the bristle ends are either immersed in a solvent at a defined rate and pulled out again, and the solvent bath is subjected to ultrasonic vibration (DE-A-30 07 761) or it a plastic monofilament is immersed in a viscous liquid and coated with a jacket which tapers towards the end by pulling out the corresponding speed profile (US Pat. No. 2,207,158).

Another type of method for producing conical bristles is based on an endless monofilament which, after extrusion, is intermittently tapered by changing the rate of stretching (DE-C-8 41 483, US-A-2 341 823) and cut into bristles in the region of the taper , or hollow monofilaments are produced (US-A-3 184 822) and these are thermally compressed towards the end after cutting. Furthermore, bristles are known in which the bristle jacket is profiled (US-A-2 317 485) and / or roughened (US-A-2 862 284) to improve the cleaning effect.

The invention is concerned exclusively with a mechanical method. As such, planing, milling and grinding, possibly also in combination with one another, are known. To manufacture toothbrushes, the bristles of which lie in a contoured area, the longer bristles are firstly arranged in rows by wedge-shaped inserts displaced outwards, the shorter bristles gripped laterally, cut and ground at their ends, after removing the inserts the longer bristles are ground (EP-A-0 078 569). In another known method (US-A-2 227 126) with combined milling and grinding machining, the toothbrushes or their bristles are guided over the outer surface of a plurality of rotating disk tools, the outer surface of which is recessed and differently profiled. The bristle contour is achieved by a corresponding path of movement of the brushes. In order to cut the bristles into the desired contour before machining, strips are arranged in comb-like manner between the individual rows of bristles, which have different heights and above which the bristles are cut. In order to support each bundle individually, further bars can also be inserted perpendicular to the strips. The actual end machining is complex because of the large number of different tools and the machining result is unsatisfactory, since the bristles or bristle bundles run at different angles to the machining surface.

The invention is based on a known method (DE-C-9 58 016, DE-A-29 22 289), in which the bristles cut to length are processed at their ends by a flat grinding surface rotating about two axes. The grinding surface is arranged perpendicular to the bristles. Due to the circular movement of each point of the grinding surface, the bristles should be pressed accordingly to ensure that each bristle is rounded evenly at its end. The pressure can be varied (DE-C-9 58 016) by the holder fixing the brush being adjustable by means of threaded spindles and threaded nuts, initially with a stronger one Pressure and accordingly greater deflection of the bristles started and then the holder is moved away from the grinding surface. Even with this method, however, due to the large free length of the bristles and the resulting different bending behavior and the possibility of unobstructed evasion of the bristles, in particular in the outer parts of the brush, no uniform rounding of all bristle ends is achieved. It is also not possible to machine contoured brushes. The same applies to another known method (BE-A-1 001 372) in which the bristles are brought to the desired length in a single operation and machined at their ends.

The invention has for its object to further develop the aforementioned method in such a way that a perfect end machining with any brush contour and, if necessary, machining of the bristle jacket is possible in a zone extending from the bristle end in the direction of clamping. Furthermore, the object of the invention is to propose a device suitable for carrying out the method.

The procedural part of the object of the invention is solved by the characterizing features of claim 1.

In the method according to the invention, the bristles are clamped in as short cuts or as part of endless monofilaments with a distance from the bristle ends corresponding approximately to the final length. This can be a clamping device used in the production process for brush production, which clamps the bristles in the configuration relevant for the finished brush fixed, or it is the brush body or a part of the same, in which the bristles have been inserted during the manufacturing process.

As a rule, the bristles are then supported at a distance from the clamping point after being clamped, cut to the desired length on this support, which also forms a shearing surface, and then machined, in particular rounded, at the ends by grinding. The grinding pressure required for the end machining is preferably generated by adjusting the grinding surface in the direction of the bristle ends, the grinding pressure possibly being varied during the machining.

Since the length of the bristles can vary depending on the type of brush to be manufactured, the grinding pressure and thus the machining result depends largely on the length of the bristles - the bristles more or less evade the grinding pressure depending on the length and position within the bundle or the brush the bristles are additionally supported laterally between their clamping and the free bristle ends. This lateral support is formed by the shear surface for cutting. It can be varied, for example to ensure the same free length for all bristles and thus to ensure a uniform grinding pressure on all bristle ends. Furthermore, by varying the distance of the lateral support from the bristle ends, the machining result itself, namely the type of rounding, can be influenced, so that flat tips, spherical or ellipsoidal shapes can be produced on the bristle ends.

In the case of a large number of brushes, the bristles or Bristle bundles are not arranged on the brush body perpendicular to the clamping plane, but extend at angles that deviate from 90 degrees. It is often the case that the bristles or Bristle bundles run at different angles. In order to ensure a uniform end processing for all bristles here, too, it is provided that the bristles are laterally supported at a distance from the clamping plane and laterally displaced by means of the support such that they are perpendicular to the clamping plane or to the grinding surface between the support and the bristle ends run, and then the grinding surface is delivered.

The bristles or bundles of bristles are not only supported laterally according to the above-mentioned embodiment within the scope of their predetermined angular position, but are also brought into a position perpendicular to the grinding surface by lateral displacement of the support, that is to say bent relative to the clamping plane at the complementary angle, so that all bristles be acted upon by the grinding surface in the same position. After grinding and after the lateral support has ceased, the bristles return to their originally specified angular position over their entire length.

The above-mentioned process variant can be combined with the cutting process in such a way that the bristle ends are first cut to the desired size immediately after the lateral displacement immediately above the support, then the support is moved parallel to the bristles while increasing the distance to the bristle ends and the grinding surface is then delivered.

Due to the support of the bristles or bristle bundles carried out in the manner according to the invention, they can be cut to the same length despite different angular positions, the bristles being supported directly below the cutting plane. After cutting, the bristles become larger Distance from the bristle ends supported laterally and then ground at their ends.

In the case of toothbrushes, in particular, that the bristles or the bristle bundles have different free lengths in order to form a contoured brush surface, a uniform processing result for all bristles is ensured according to a further embodiment of the invention in that the bristles depending on their length between the clamping plane and the lateral support perpendicular to their extension laterally deflected until the ends of all bristles lie in one plane, and then the grinding surface is delivered.

Due to the deflection of the longer bristles compared to the shorter bristles below the support plane, it can be ensured that all ends of the bristles lie in a common plane, so that the same grinding pressure and free length conditions are present for each bristle during the subsequent grinding.

The method according to the invention also allows processing of the bristle jacket in the region of the bristle ends, for example in order to roughen the bristles, to sharpen them or the like, for example by injecting the abrasive surface, preferably suddenly, to such an extent that the bristles are bent in one direction and with it Bristle jacket of the grinding surface adjoining the bristle end. The length of the bristle jacket lying against the grinding surface and thus the machined length of the bristle can in turn be influenced by the lateral support of the bristles. The smaller the distance of the support from the grinding surface, the smaller the bent bristle length.

In another embodiment with the same objective the grinding surface and the clamping plane are moved parallel to each other from a position in which the grinding surface is located on the side of all bristles and the distance between the two is smaller than the bristle length such that the bristles are bent against the direction of displacement and align with the area to be processed of their jacket on the grinding surface. Here, by changing the distance between the grinding surface and clamping, before moving the grinding surface into the grinding position, the machining length on the bristle jacket can be preset very precisely. In both of the above-mentioned embodiments of the method, the separate and variable-variable support of the bristles can optionally be dispensed with.

To carry out the method, the invention is based on a device according to the preamble of claim 10 (DE-C-9 58 016).

Such a device is characterized according to the invention by the characterizing features of claim 10. In this embodiment, the support is first brought into the position which is intended for cutting the bristle ends, and then the cutting device is guided over the support and the bristles are cut in the process. The support is then moved away from the bristle ends until there is a certain free bristle length. The grinding wheel is then fed in and the machining process begins. For this purpose, two or more supports can also be provided, which can be moved parallel to the bristles independently of one another and of which the supports close to the bristle ends forms the shear surface and the two together form the support during grinding.

If necessary, the procedure can be such that the grinding member has an infeed drive which forms the device for changing the distance.

In order to be able to process bristles that are at an angle to the grinding surface that deviate from 90 degrees, an embodiment of the device according to the invention is characterized in that the support can be displaced parallel to the grinding surface.

In order to be able to process bristles of different lengths, a device for deflecting the bristles from their extended position is provided between the clamping and the support and engages between the bristles or individual bristle bundles and can be displaced transversely to them. Since the differences in brushes with different bristle lengths are generally only within narrow limits, the bundle spacing is generally sufficient to have enough space between the bundles for the necessary deflection.

The device is further characterized in that the grinding member can be moved parallel to the support into the grinding position from a position next to the bristles fixed by the clamping, in which its distance from the support is smaller than the free length of the bristles. In this way, the bristles can be bent from the grinding surface when the grinding member is moved into the grinding position, that they rest with part of their jacket on the grinding surface and can be processed on the jacket side in this way.

The support can be formed from strips which engage between the bristles or the bristle bundles in the manner of a comb. The strips are preferably arranged at a short distance from one another and on the sides facing one another and in the grid predetermined by the arrangement of the bristles or bristle bundles, these laterally encompassing recesses.

In this embodiment, the strips can be inserted from the side between the bristles or bristle bundles, each bundle of a bundle row being supported laterally in all directions between two adjacent strips.

In order to facilitate the retraction, the ledges are tapered at their leading ends.

Instead of a strip-like design with recesses encompassing the bundle, the design can also be such that the support is formed from bars which engage between the bristles or the bristle bundles in the manner of a comb.

In the aforementioned exemplary embodiment, the bristles are supported in a sufficiently stable manner only in two directions existing perpendicular to one another. All-round support can be achieved by providing two groups of rods which engage in a comb-like manner between the bristles or the bundles of bristles and which run perpendicular to one another, adjacent rods of both groups each comprising a bristle or a bundle of bristles.

The embodiment with the comb-like arranged rods is recommended above all with a narrow bristle spacing then the side support between the bristle bundles can be retracted from the side.

Finally, the device for deflecting the bristles can likewise consist of individual rods which can be inserted from the side between the bristles or the bristle bundles and between the clamping plane and the support and displaceable transversely to the bristles. In this embodiment, too, it is advisable to arrange two or more supports, between which the rods of the deflection device are arranged. The supports and the rods of the deflection device move in simultaneously or in succession between the bristle bundles. The rods of the deflection device only engage in the area of the longer bristle bundles and initially deflect them by transverse displacement between the two supports until all bristle ends lie approximately in one plane. Only then is the grinding element moved in and the ends are machined.

Fig. 1

eine schematische Ansicht einer ersten Ausführungsform der Vorrichtung, teilweise im Schnitt;

Fig. 2

einen Schnitt II-II gemäß Figur 1;

Fig. 3

einen Schnitt III-III gemäß Figur 1;

Fig. 4a-4e

je eine einzelne Borste in vergrößertem Maßstab mit unterschiedlich bearbeiteten Enden;

Fig. 5a-5c

eine schematische Ansicht der Vorrichtung mit verschiedenen Bearbeitungsvorgängen;

Fig. 6a-6c

verschiedene Phasen beim Zuschneiden der Borsten und Bearbeiten der Borstenenden;

Fig. 7a-7d

verschiedene Phasen bei der Bearbeitung von winklig angestellten Borsten
und

Fig. 8a-8d

verschiedene Phasen bei der Bearbeitung unterschiedlich langer Borstenbündel.

The invention is described below with reference to exemplary embodiments shown in the drawing. The drawing shows:

Fig. 1

a schematic view of a first embodiment of the device, partly in section;

Fig. 2

a section II-II of Figure 1;

Fig. 3

a section III-III of Figure 1;

Figures 4a-4e

a single bristle on an enlarged scale with different machined ends;

5a-5c

a schematic view of the device with various machining operations;

6a-6c

different phases in cutting the bristles and processing the bristle ends;

Figures 7a-7d

different phases in the processing of angular bristles
and

Figures 8a-8d

different phases in the processing of bristle bundles of different lengths.

The device according to FIG. 1 has a grinding member 1 with a grinding support 2. The grinding carrier 2 in turn has a flat grinding surface 3, which is applied as a covering to the grinding carrier 2. In the exemplary embodiment shown, the grinding member 1 is moved in a circular movement about an axis 5 by three eccentrics 4 (see FIG. 3). For this purpose, at least one of the eccentrics 4 is driven. The grinding surface consequently executes the circular movement indicated in FIG. 3 with directional arrows, in which each point of the grinding surface 3 moves on a circle of the same diameter. The grinding member 1 can also be advanced in the direction of the double arrow 6 (see FIG. 1). The infeed movement can be carried out by a hydraulic or spindle drive.

The device can also have a clamping 7, which has a plurality of through holes 8, which are arranged in a grid corresponding to the grid of the bundle arrangement on the finished brush and have a diameter which corresponds approximately to the bundle diameter. This tension can be designed in the form of a clamping device so that the bristle bundles 9 inserted into the through holes 8 are optionally additionally tightly tensioned. Instead of a device-specific clamping 7, this can also be formed directly by the bristle carrier of the brush, to which the bristle bundles 9 are already attached.

The device also has a lateral support 10 which laterally supports the bristle bundles 9 at a distance from the plane predetermined by the clamping 7. The support 10 can be moved parallel to the bristles in the direction of the double arrow 11. Finally, the device also has a cutting device 12 in the form of a cutting knife which can be moved over the entire bristle field. The support 10 serves as the shear surface for the cutting knife.

According to a preferred exemplary embodiment, which can be seen in more detail in FIG. 2, the support 10 consists of parallel strips 13 which can be inserted from the side between the bristle bundles 9 and, for this purpose, taper to a point at their ends 14. The strips 13 are arranged close to each other and have partially circular recesses 15 on the sides facing each other, so that opposing recesses approximately complement each other to form a circular shape and each comprise a bristle bundle 9 on all sides in the retracted position. Instead of the strips shown in FIG. 2, which can only be extended and retracted in one direction, the support can also be formed by simple straight-line rods, in which case two groups of mutually perpendicular rods are provided, each of which is inserted like a comb between the bristle bundles 9 can be so that a bristle bundle is supported laterally between each adjacent and crossing bars.

With the device shown in Figures 1 to 3, the bristles within a bundle in Figure 4 can be closer can be edited as shown. A single bristle 16 initially has the shape shown in FIG. 4a. For example, it is cylindrical and has cuts 17 running perpendicular to its axis at both ends. Such a bristle 16 can only be rounded at its end, as indicated at the end 18 in FIG. 4b. In addition, the bristle 16 can be roughened on its section 19 near the rounded end 18 (FIG. 4c). Instead, it is possible to sharpen the bristle 16 towards the end of the section 20 in order to obtain greater flexibility in the region of the end (FIG. 4d), it also being possible to round the tip 21 at the end of the conically tapering section 20 (Figure 4e).

FIG. 5a shows the usual machining process when rounding the bristle ends. For this purpose, the support 10 is arranged at a predetermined distance from the clamping 7, so that the bristle bundles 9 protrude beyond the support 10 with a length that permits the desired degree of deflection. The grinding member 1 is fed down in the direction of the double arrow 6 until the bristle bundles 9 bend to a small extent. The bristle ends are ground in this position. During grinding, the grinding member 1 can be advanced continuously or in stages in order to achieve a perfectly rounded transition from the bristle end to the bristle jacket or to contour the bristle end in a certain way (FIG. 5b). The bristle bundles can be bent even more strongly, as is shown in FIG. 5c, by even stronger infeed, which can also take place suddenly. This bend can also be obtained in a different manner in that the grinding member 1 is moved from the side into the grinding position from a position outside the bristle bundle at the distance shown in FIG. 5c, the grinding surface 3 bending the bristle bundle accordingly. The bristles can be in position 5c most edited on their coat, for example, roughened or pointed. In such a processing of the bristle jacket, the processing of the bristle ends preferably takes place only after the processing shown in FIG. 5c.

In FIG. 6a, the bristle bundles 9 are in turn held by the clamping 7. The support 10 initially serves as a shear surface for the cutting device 12. For this purpose, the support 10 is first moved upwards towards the bristle end after it has been inserted between the bristle bundles. In the position shown in FIG. 6a, in which the bristles of different lengths protrude above the support 10 at different heights, the cutting device 12 moves over the support 10 and brings the bristles to the same length, as shown in FIG. 6b. The support 10 then moves down into its position specified for the grinding process and the grinding member 1 is fed. After grinding, the bristle bundles 9, as shown in FIG. 6c, are rounded at their ends.

Figure 7a shows a clamping 7, in which the bristle bundles 9 are held in a position deviating from 90 degrees. For this configuration of the bristle bundles, two supports 10, 22 are provided which are moved into contact with one another between the bristle bundles 9. The supports 10, 22, as shown in FIG. 7b, are then displaced transversely to the bristle bundles 9. So that the bristle bundles are aligned with the clamping 7 in the vertical. The upper support 10 in turn moves up to near the bristle ends and forms a shear surface for the cutting device 12. Subsequently, the support 10 is again brought down into contact with the support 22, so that the bristle sections projecting above the support 10 continue to be used stand perpendicular to the flat grinding surface 3. Then the grinding member 1 is fed and the bristle ends are processed. After the grinding member 1 has moved away and the supports 10, 22 have been pulled out, the bristle bundles 9 again take those in FIG. 7d shown angular position for clamping 7. The ends of all the bristles of the bundle 9 are rounded evenly.

FIGS. 8a to 8d show the processing of a bristle arrangement within which the bristle bundles have different lengths. This is the case, for example, with brushes in which the bristle ends lie on a contoured surface.

Here too, the bristle bundles 9 are in turn fixed in a clamping 7. In addition to the bristle bundles 9 of the same length, there is at least one bristle bundle 23 of greater length (FIG. 8a). In this case, the device again has two supports 10, 22, which are arranged at a distance from the clamping 7, but also at a distance from one another. In the area of the long bundle of bristles 23, a device 24 engages between the two supports 10, 22, which in the exemplary embodiment shown is formed by two parallel rods 24 which are arranged at a distance from one another which corresponds approximately to the diameter of the bundle of bristles 9, and fix the bristle bundle 23 between them. The rods 24 can be displaced transversely to the bristle extension, as indicated by the arrow 24 in FIG. 8b. With this displacement movement, the rods 24 deflect the bundle of bristles 23 between the supports 10 and 22 to the side. The extent of the displacement movement is selected so that the ends of the bristle bundle 23 lie in one plane with the ends of the bristle bundle 9 (FIG. 8c). Then the grinding member 1 is fed in order to machine the ends of the bristles. After the grinding member 1 has moved away and the supports 10, 22 and the rods 24 have been moved out, the bundle of bristles 23 returns to the extended position (FIG. 8d), so that the ends of all the bundles of bristles 9, 23 are rounded uniformly.

Claims (22)

1. Method for treating bristles of brushes on and in the vicinity of the use-side bristle end, in that the bristles, optionally combined into bundles, are clamped spaced from their use-side ends, are laterally supported between said ends and the clamping means and cut to size, as desired, at the support and subsequently by means of an abrading surface located substantially at right angles to the bristle extension and whereof all points are moved on circular paths of the same diameter treatment is carried out, it being possible to modify the pressure of the bristle ends on the abrading surface, characterized in that the bristles, optionally in bundles, are supported by means of the lateral support, which forms the shearing surface for the cutting to size for influencing the treatment result on the use-side ends with a variable spacing from the abrading surface, but which is always the same for all the bristles.
2. Method according to claim 1 for the treatment of bristles, particularly the use-side bristle ends of brushes, in which the bristles, optionally in bundles, extend at an angle differing from 90° with respect to the clamping plane, characterized in that the bristles are so laterally supported with a spacing from the clamping plane and are sideways displaced by means of the support, that they run between the support and the bristle ends at right angles to the clamping plane or to the abrading surface and then the abrading surface is fed in.
3. Method according to claim 2, characterized in that, following the lateral displacement and immediately above the support, the bristle ends are firstly cut to the desired size, then the support is moved in bristle-parallel manner whilst increasing the spacing from the bristle ends and then the abrading surface is fed in.
4. Method according to claim 1 for treating the use-side bristle ends of brushes, in which the bristles, optionally in bundles, have a different length, characterized in that the bristles, as a function of their length between the clamping plane and the lateral support are laterally deflected at right angles to their extension until the ends of all the bristles are located in one plane and then the abrading surface is fed in.
5. Method according to one of the claims 1 to 4, characterized in that for the treatment of the bristle material the abrading surface, preferably in sudden bursts, is fed in to such an extent that the bristles are bent in one direction and with the bristle envelope are connected to the bristle end engage on the abrading surface.
6. Method according to one of the claims 1 to 4, characterized in that for the treatment of the bristle material the abrading surface and the clamping plane are displaced parallel to one another from a position in which the abrading surface is positioned laterally of all the bristles and the spacing of both from one another is smaller than the bristle length, in such a way that the bristles are bent counter to the displacement direction and engage with the area to be treated of their envelope on the abrading surface.
7. Method according to one of the claims 1 to 6, characterized in that for adjusting the pressure, the abrading surface is fed in in the direction of the bristles.
8. Method according to one of the claims 1 to 7, characterized in that for treating the bristle envelope the abrading surface is fed in, preferably in sudden bursts, to such an extent that the bristles are bent in one direction and with their bristle envelope connected to the bristle end engage on the abrading surface.
9. Method according to one of the claims 1 to 7, characterized in that for the treatment of the bristle envelope the abrading surface and the clamping plane are displaced parallel to one another from a position in which the abrading surface is positioned laterally of all the bristles and the spacing of the two from one another is smaller than the bristle length, in such a way that the bristles are bent counter to the displacement direction and engage on the abrading surface with the area to be treated of the envelope.
10. Apparatus for treating the bristles of brushes on and in the vicinity of the use-side bristle ends with a clamping means fixing the bristles, optionally in bundles, a lateral support for the bristles acting between the clamping means and the bristle ends, a cutting device for cutting to length the bristles, as desired, at the support and an abrading member with an abrading surface located substantially at right angles to the bristle extension and which is driven by eccentrics in such a way that each point of the abrading surface moves on a circular path with the same diameter, and having a device for modifying the spacing between the clamping means and the abrading surface, characterized in that the support (10), which forms the shearing surface for the cutting device and surrounds substantially on all sides the bristles or individual bristle bundles (9) in a plane parallel to the abrading surface (3) and is movable parallel to the bristles for the the treatment of the bristle ends.
11. Apparatus according to claim 10, characterized in that the abrading member (1) has an infeed drive forming the spacing modifying device.
12. Apparatus according to claim 10 for performing the method according to claim 2 or 3, characterized in that the support (10) is displaceable parallel to the abrading surface (3).
13. Apparatus according to one of the claims 10 to 12, characterized in that there are two or more parallel supports (10, 22), whereof that (10) facing the bristle ends forms the shearing surface.
14. Apparatus according to one of the claims 10 to 13, characterized in that the supports (10, 22) are movable independently of one another parallel to the bristles.
15. Apparatus according to one of the claims 10 to 14 for performing the method according to claim 4, characterized in that between the clamping means (7) and the support (10, 22) is provided a device (24) engaging between the bristles or individual bristle bundles (9) and movable transversely thereto for deflecting the bristles out of their stretched position.
16. Apparatus according to one of the claims 10 to 15 for performing the method according to claim 6, characterizing in that the abrading member (1) is displaceable parallel to the support into the abrading position from a position alongside the bristles fixed by the clamping means (7), in which its spacing from the support (10) is smaller than the free length of the bristles.
17. Apparatus according to one of the claims 10 to 16, characterized in that the support is formed by strips (13) engaging in comb-like manner between the bristles or bristle bundles (9).
18. Apparatus according to one of the claims 10 to 17, characterized in that the comb-like strips (13) are arranged with a small mutual spacing and have in the grid or raster given by the arrangement of the bristles or bristle bundles (9) recesses (15) laterally surrounding the same.
19. Apparatus according to one of the claims 10 to 18, characterized in that the strips (13) can be introduced from the side between the bristles or bundles (9) and the leading ends (14) thereof are pointed.
20. Apparatus according to one of the claims 10 to 19, characterized in that the support (10) is formed by bars engaging in comb-like manner between the bristles or bristle bundles (9).
21. Apparatus according to claim 20, characterized in that there are two groups of bars engaging in comb-like manner between the bristles or bristle bundles (9) and which run at right angles to one another, adjacent bars of both groups in each case surrounding a bristle or a bristle bundle.
22. Apparatus according to one of the claims 15 to 20, characterized in that the device for deflecting the bristles (23) comprises individual bars (24), which can be introduced between the bristles or bristle bundles (9) and are displaceable transversely to the bristles.

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