Brush and Method for Producing Same

Abstract

The invention relates to a brush including a brush head body which includes a recess through which a bundle of bristles passes, the securing-side end of which is provided by means of a melt process with a thickened portion for securing the bundle of bristles to the brush head body, wherein the brush head body forms a collar which extends up to the thickened portion and circumferentially surrounds the bundle of bristles and which is provided at a distance from a brush head body surface projected over by the bundle of bristles at the use side, and is bonded to the thickened portion by means of a melting process.

Claims

1. A brush comprising a brush head body which comprises a recess through which a bundle of bristles passes, the securing-side end of which is provided by means of a melt process with a thickened portion for securing the bundle of bristles to the brush head body, wherein the brush head body forms a collar which extends up to the thickened portion and circumferentially surrounds the bundle of bristles and which is provided at a distance from a brush head body surface projected over by the bundle of bristles at the use side, and is bonded to the thickened portion by means of a melting process.

2. The brush according to claim 1, wherein a front side which is shaped by the collar is fully connected to the thickened portion by means of a melting process.

3. The brush according to claim 1, wherein the collar has a conical outer circumferential surface.

4. The brush according to claim 1, wherein a free front side of the collar is provided between a front side of the brush head body through which the bundle of bristles passes at the use side, and a rear side of the brush head body which extends substantially in parallel therewith.

5. The brush according to claim 1, wherein the brush head body has at least one recess and wherein the bundle of bristles is received in the recess.

6. The brush according to claim 1, wherein the brush head body is made from the same plastic as filaments of the bundle of bristles.

7. The brush according to claim 5, wherein the securing-side end of the bundle of bristles is arranged at a distance from a surface of the brush head body.

8. The brush according to claim 2, wherein the melt of the thickened portion is pressed against the collar.

9. The brush according to claim 1, wherein the brush head body is provided with a coating at its rear side which is opposite the use-side end of the bundle of bristles.

10. (canceled)

Description

[0018] Further details and advantages of the present invention will become apparent from the following description of an embodiment in conjunction with the drawing, in which:

[0019] FIG. 1 is a schematic sectional view of a part of a brush head body;

[0020] FIG. 2 shows the detail shown in FIG. 1 of the brush head body after introduction of a bundle of bristles;

[0021] FIG. 3 highlights the embodiment shown in FIGS. 1 and 2 during melting of the bundle of bristles, and

[0022] FIG. 4 shows the bundle of bristles after welding with the brush head body in the embodiment according to FIGS. 1 to 3.

[0023] FIG. 1 shows a brush head body 1 in a sectional view. The brush head body 1 has a recess 2 which is inwardly offset relative to a rear side 3 and is thus provided between said rear side 3 and a front side 4. A collar 5 which is formed by the material of the brush head body 1 and which projects over a bottom 6 of the recess 2 towards the rear side 3 is located in the recess 2. Thus, the bottom 6 forms an annular gap around the collar 5. The collar 5 is part of a continuous recess 7 without steps that is recessed in the brush head body 1.

[0024] In the illustrated embodiment the brush head body 1 consists of a plastic component, for instance PP or PA.

[0025] In addition to the details according to FIG. 1, FIG. 2 shows a bundle of bristles 8 which is introduced into the recess 7. A securing-side end of the bundle of bristles 8 projects over a free front side 9 of the collar 5. The distance between the free end of the bundle of bristles 8 and the front side 9 of the collar is about 1 to 2.5 the diameter of the bundle of bristles 8. In the position shown in FIG. 2, the bundle of bristles 8 is now axially fixed, for instance by a holding plate which presses against the use-side end of the bundle of bristles.

[0026] FIG. 3 illustrates the process step of melting the bundle of bristles 8. For this purpose hot air flows in the illustrated embodiment with a flow S at the end side against the securing-side end of the bundle of bristles 8. The hot air fuses the bundle of bristles 8. Melt is developing in this process, the melt interconnecting neighboring filaments of the bundle of bristles 8 and also passing up to the collar 5. The hot air applied to the bundle of bristles 8 also heats the free front side 9 of the collar 5 and melts the same. This yields a welding between a thickened portion of the bundle of bristles 8, which thickened portion is designated by reference numeral 10, and the collar 5. The thickened portion 10 can also be produced by applying a hot plate or by the radiation heat of a strong light source.

[0027] As illustrated by FIG. 4, this yields a solid material bond between the bundle of bristles 8 and the brush head body 1. The brush is thereby produced in its basic shape. The rear side 3 can also be provided with a coating to cover the recess 2 and to produce a flat and esthetically appealing design also on the rear side of the future brush. On the finished product, the use-side end of the bundle of bristles 8 projects over the front side 4 of the brush head body 1. Owing to the material bond the bundle of bristles 8 is safely connected to the brush head body 1.

LIST OF REFERENCE NUMERALS

[0028] 1 Brush head body [0029] 2 Recess [0030] 3 Rear side [0031] 4 Front side [0032] 5 Collar [0033] 6 Bottom [0034] 7 Recess [0035] 8 Bundle of bristles [0036] 9 Free front side [0037] 10 Thickened portion