Technical field

The present disclosure relates to a paint brush. More specifically, the disclosure relates to a paint brush as defined in the introductory parts of and claim 1.

Background art

The conventional paint brush has a handle and a bristle head/bristle pack including a bundle of bristles, which is able to hold therein a paint by adhesion as well as capillary forces.

A parameter for a paint brush is the paint pick-up and the paint release, i.e. the amount of paint that the paint brush pick-up when it is dipped in paint and the amount of paint that the paint brush is able to release to the surface to be painted. A large paint pick-up is often a prerequisite for a god paint release.

There is thus a need for a paint brush with improved paint pick-up.

Summary

It is an object of the present disclosure to mitigate, alleviate or eliminate one or more of the above-identified deficiencies and disadvantages in the prior art and solve at least the above mentioned problem.

The inventors have realized that a paint brush picks-up paint both by adhesion/wetting of the paint to the bristles and by capillary forces that is created between bristles and that sucks the paint into the bundle of bristles. There is a lot of focus on how to increase the paint pick-up of the tip of the paint brush by testing different types of blends of bristles, structures of the tips of the bristles and different inserts separating the bristles in a bundle of bristles.

The amount of paint that could be picked up by the tip of the bundle of bristles is limited by the laws of physics, as an example, the capillary forces in relation to the gravity forces. Further, the inventors have after several tests and analyses realized that the inserts and sets of inserts create voids inside the bristle pack. Paint is sucked into the voids by capillary forces and the paint in the voids is wetting the walls of the voids and thereby entering into the bundle of bristles from the wall of the voids. In production of a paint brush, the inserts are positioned in the bundle of bristles and bristles of the bundle of bristles are positioned between two inserts. If the number of inserts in a paint brush is increased, the challenges of actually positioning the inserts correctly with an intended amount of bristles between two inserts are increased. An increased number of inserts thus also increases the complexity of manufacturing such a paint brush.

According to a first aspect there is provided a paint brush, comprising a handle, a set of inserts and a bundle of bristles comprising a plurality of bristles and, wherein the bundle of bristles comprises a top bundle part, a bottom bundle part and a middle bundle part positioned between the top and bottom bundle parts, the plurality of bristles being arranged such that a length of the bristles extend from the bottom bundle part to the top bundle part, the bottom bundle part of the bundle of bristles is connected to the handle, the set of inserts comprising a first insert and a second insert, the first insert comprises a first insert surface comprising at least two ridges and at least two valleys extending in a direction of a length of the first insert, the second insert comprises a second insert surface comprising at least two ridges and at least two valleys extending in a direction of a length of the second insert, the set of inserts are at least partly arranged in the bottom bundle part of the bundle of bristles, wherein the lengths of the first and second inserts are arranged in parallel with the length of the bristles, the first insert surface of the first inserts is facing the second insert surface of the second insert, the ridges of the first insert surface are positioned at the valleys of the second insert surface, the ridges of the second insert surface are positioned at the valleys of the first insert surface, and at least a part of the bristles of the bundle of bristles is positioned between the first and second insert surfaces, wherein a height of the ridges is at least 1mm and wherein a depth of the valleys is at least 1 mm.

The paint brush according to the above, increases the area of the bristles in the bundle of bristles that the set of inserts could come into contact with and affect. By increasing the area, the paint pick-up of the bundle of bristles could be increased in comparison with a corresponding paint brush without the set of inserts. The area is increased in comparison to a set of inserts having straight, flat or plane surfaces facing each other. By increasing the area, the number of inserts could be reduced and still affect the same amount of bristles in the bundle of bristles or the set of inserts could affect a larger area without the need for increasing the number of inserts. The combination of the valleys and ridges of the first and second insert surfaces and their position in relation to each other makes the area that the set of inserts could affect larger than if the insert surfaces are flat. By increasing the area of the set of inserts, the number of inserts could be reduced and still affect a corresponding amount of bristles. By increasing the area of the set of inserts, the number of inserts could affect a larger amount of bristles without the need of increasing the number of inserts. Further, the paint brush could be manufactured by a less complicated process and still have a large area of the set of inserts that is in contact with the bundle of bristles. Further, how the inserts are affecting the paint pick-up of a bundle of bristles is not limited to the shape of each insert, rather it is the interaction between different surfaces of different inserts that affect the bristles and the paint pick up of the bundle of bristles.

By increased area is meant that the width of the surface is larger in comparison to a width of a straight surface. If the inserts have the same length in parallel to a length of the bristles, the area of the insert with the ridges and valleys is larger than a corresponding area of the insert without ridged and valleys.

Having relatively high ridges (at least 1 mm) and deep valleys (at least 1 mm) in combination with positioning the ridges of one insert at the valleys of the other insert, provides a synergistic effect. On the one hand, because the ridges and valleys have relatively large dimensions, not only will the bottom bundle part be deformed, but some of the deformation will extend all the way to the middle bundle part. The deformation of the middle bundle part, which (in addition to the top bundle part) is the part that is dipped in paint, will increase the pick-up area for the paint. On the other hand, providing such large ridges and valleys may make it difficult to fit the inserts in the paint brush, but by means of the relative displacement of the inserts they can be well accommodated. Thus, by providing the inserts displaced relative to each other, larger dimensions of the ridges and valleys can be provided, whereby the deformation and the pick-up area in the middle bundle part is increased. Accordingly, the pick-up capability of the paint brush is improved.

According to some embodiments, the first insert comprises a second insert surface comprising at least two ridges and at least two valleys extending in a direction of the length of the first insert, wherein the second insert surface is opposite to the first insert surface.

By having ridges and valleys on two surfaces of the first insert, the area of the bundle of bristles that the first insert is in contact with is further increased. Thus, the paint pick-up of the paint brush could be enhanced.

According to some embodiments, the paint brush comprises a further first insert, wherein the first insert surface of the further first insert is facing the second insert surface of the first insert, the ridges of the first insert surface of the further first insert are positioned at the valleys of the second insert surface of the first insert, the ridges of the second insert surface of the first insert are positioned at the valleys of the first insert surface of the further first insert, and at least a part of the bristles of the bundle of bristles are positioned between the first insert surface of the further first insert and the second insert surface of the first insert.

By having several inserts, the set of inserts could even further interact to obtain a large paint pick-up of the paint brush.

According to some embodiments, the second insert comprises a first insert surface comprising at least two ridges and at least two valleys extending in the direction of the length of the second insert, wherein the first insert surface is opposite to the second insert surface.

By having ridges and valleys on two surfaces of the second insert, the area of the bundle of bristles that the insert is in contact with is further increased. Thus, the paint pick-up of the paint brush could be enhanced.

According to some embodiments, the paint brush comprises a further first or second insert, wherein the first insert surface of the second insert is facing the second insert surface of the further first or second insert, the ridges of the first insert surface of the second insert are positioned at the valleys of the second insert surface of the further first or second insert, the ridges of the second insert surface of the further first or second insert are positioned at the valleys of the first insert surface of the second insert, and at least a part of the bristles of the bundle of bristles are positioned between the first insert surface of the further first insert and the second insert surface of the first insert.

By having several inserts, the inserts in the set of inserts could even further interact to obtain a large paint pick-up of the paint brush.

According to some embodiments, the ridges and the valleys of the first and second inserts has a corresponding shape.

According to some embodiments, the first insert and the second insert has the same shape.

According to some embodiments, the height of the ridges are at least 1,5 mm.

According to some embodiments, the depth of the valleys are at least 1,5mm.

According to some embodiments, the valleys are recesses in a plate. According to some embodiments, the ridges extend from a plate.

According to some embodiments, the valleys are the space between two adjacent ridges.

According to some embodiments, the ridges are the space between two adjacent valleys.

According to some embodiments, a cross sectional shape perpendicular to the length of the first and/or second inserts are a waveform or a zig-zag-shape.

According to some embodiments, a cross sectional shape perpendicular to the length of the ridges of the first and/or the second inserts are triangular, arc or rectangular.

According to some embodiments, a cross sectional shape perpendicular to the length of the valleys of the first and/or the second inserts are triangular, arc or rectangular.

According to some embodiments, a cross sectional shape perpendicular to the length of the valleys of the first and/or the second inserts are triangular, arc or rectangular.

According to some embodiments, the cross sectional shape perpendicular to the length of the ridges of the first and/or the second inserts are the same as the cross sectional shape perpendicular to the length of the valleys of the first and/or the second inserts.

According to some embodiments, the first insert surface of the first insert are positioned at a distance of l-5mm from the second inset surface of the second insert.

According to some embodiments, a distance between the first and second insert surfaces of the same first and/or second insert are l-5mm.

According to some embodiments, the set of inserts is configured to create voids between bristles of the bundle of bristles, wherein each void extend in the direction of the length of the bristles either from the first or the second insert into the middle bundle part of the bundle of bristles.

According to some embodiments, the voids comprises a base having a thickness and a width at the first or second insert and a length extending from the first or second insert towards the top bundle part of the bundle of bristles, wherein the thickness of the base of the voids are l-5mm. According to some embodiments, the thickness of the base is 3 mm or smaller, preferably 2 mm or smaller.

According to some embodiments, the paint comprises a cassette collar and wherein at least a part of the bottom bundle part is arranged in the cassette collar.

According to some embodiments, the paint comprises a ferule being arranged to connect the bundle of bristles to the handle.

According to some embodiments, one of the first and second inserts are mounted on the cassette collar.

According to some embodiments, one of the first and second inserts are mounted on the ferrule.

According to some embodiments, the ridges and the valleys extend across the whole length of the first and/or second insert.

According to some embodiments, a distance between two adjacent ridges are at least 1 mm. According to some embodiments, a distance between two adjacent ridges are at least 3mm.

According to some embodiments, a distance between two adjacent valleys are at least 1 mm. According to some embodiments, a distance between two adjacent valleys are at least 3 mm.

According to some embodiments, the number of ridges are different from the number of the valleys of the first or second insert surface.

The present disclosure will become apparent from the detailed description given below. The detailed description and specific examples disclose preferred embodiments of the disclosure by way of illustration only. Those skilled in the art understand from guidance in the detailed description that changes and modifications may be made within the scope of the disclosure.

Hence, it is to be understood that the herein disclosed disclosure is not limited to the particular component parts of the device described or steps of the methods described since such device and method may vary. It is also to be understood that the terminology used herein is for purpose of describing particular embodiments only, and is not intended to be limiting. It should be noted that, as used in the specification and the appended claim, the articles "a", "an", "the", and "said" are intended to mean that there are one or more of the elements unless the context explicitly dictates otherwise. Thus, for example, reference to "a unit" or "the unit" may include several devices, and the like. Furthermore, the words "comprising", "including", "containing" and similar wordings does not exclude other elements or steps.

Brief descriptions of the drawings

The above objects, as well as additional objects, features and advantages of the present disclosure will be more fully appreciated by reference to the following illustrative and non-limiting detailed description of example embodiments of the present disclosure, when taken in conjunction with the accompanying drawings.

Figure 1 shows a side view of a paint brush according to an embodiment of the present disclosure.

Figure 2 shows a cross sectional side view of a paint brush according to an embodiment of the present disclosure.

Figure 3 shows a cross sectional side view of a paint brush according to an embodiment of the present disclosure.

Figure 4 shows a cross sectional side view of a bundle of bristles according to an embodiment of the present disclosure.

Figure 5 shows a top view of a first and/or second insert according to an embodiment of the present disclosure.

Figure 6 shows a top view of a first and/or second insert according to an embodiment of the present disclosure.

Figure 7 shows a top view of a first and/or second insert according to an embodiment of the present disclosure.

Figure 8 shows a perspective view of a first and/or second insert according to an embodiment of the present disclosure.

Figure 9 shows a perspective view of a first and/or second insert according to an embodiment of the present disclosure. Figure 10 shows a cross sectional side view of a paint brush according to an embodiment of the present disclosure.

Figure 11 shows a cross sectional view along the line C-C of the paint brush in figure 10. Figure 12 shows a cross sectional view along the line B-B of the paint brush in figure 10.

Figure 13 shows a cross sectional view along the line A-A of the paint brush in figure

Figure 14 shows top view of a set of inserts according to an embodiment of the present disclosure.

Figure 15 shows top view of a set of inserts according to an embodiment of the present disclosure.

Figure 16 shows top view of a set of inserts according to an embodiment of the present disclosure.

Figure 17 shows top view of a set of inserts according to an embodiment of the present disclosure.

Figure 18 shows a schematically cross sectional side view of bristles and an insert creating a void in the bundle of bristles according to an embodiment of the present disclosure.

Detailed description

The present disclosure will now be described with reference to the accompanying drawings, in which preferred example embodiments of the disclosure are shown. The disclosure may, however, be embodied in other forms and should not be construed as limited to the herein disclosed embodiments. The disclosed embodiments are provided to fully convey the scope of the disclosure to the skilled person.

Figure 1 shows a paint brush 1. The first aspect of this disclosure shows a paint brush 1 comprising a handle 2, a set of inserts 3 and a bundle of bristles 4 comprising a plurality of bristles 5.

The handle 2 as such is only partly disclosed and the actual size and shape of the handle 2 could be adapted to the specific type of paint brush 1. The bundle of bristles 4 comprises a top bundle part 41, a bottom bundle part 43 and a middle bundle part 42. The middle bundle part 42 is positioned between the top and bottom bundle parts 41, 43. The plurality of bristles 5 being arranged such that a length LI of the bristles 5 extend from the bottom bundle part 43 to the top bundle part 41, as is disclosed in figure 4. The bottom bundle part 43 of the bundle of bristles 4 is connected to the handle 2. According to an aspect the top bundle part 41 and the middle bundle part 42 are the parts of the paint brush 1 that is intended to be dipped in paint. According to an aspect the top bundle part 41 and the middle bundle part 42 are the parts of the bundle of bristles 4 in which paint could be picked up by capillary forces from the tip of the bundle of bristles 4.

The cross sectional shape of the bottom bundle part 43 corresponds to the cross sectional shape of the middle bundle part 42 in the transition between the bottom and middle bundle part 43, 42. The cross sectional shape of the top bundle part 41 corresponds to the cross sectional shape of the middle bundle part 42 in the transition between the top and middle bundle part 41, 42. The cross sectional shape of the middle bundle part 42 is different at the transition from the bottom bundle part 43 from the cross sectional shape at the transition to the top bundle part 41. This is due to the fact that the bristles 5 extend from the top to the bottom of the bundle of bristles 4 and thus each bristle 5 has a part that is located in the bottom bundle part 43, a part that is located in the middle bundle part 42 and a part that is located in the top bundle part 41.

The cross sectional shape of the bottom bundle part 43 is different from the cross sectional shape of the top bundle part 41. This is due to that the set of inserts 3 affects the shape of the bundle of bristles 4 less at parts of the bristles 5 that are positioned further from the set of inserts 3.

According to an aspect, the paint brush 1 comprises a ferrule 8 as is disclosed in figure 2. According to an aspect, the ferrule 8 connects the bundle of bristles 4 to the handle 2.

According to an aspect, the paint brush 1 comprises a cassette collar 7. According to an aspect, the cassette collar 7 is a ferrule 8.

According to an aspect, at least a part of the bottom bundle part 43 is arranged in the cassette collar 7.

According to an aspect, the paint brush 1 comprises a ferule 8 being arranged to connect the bundle of bristles 4 to the handle 2. According to an aspect, at least a part of the bottom bundle part 43 is arranged in the ferrule 8. According to an aspect, one of the first and second inserts 31, 32 are mounted in the cassette collar 7.

According to one aspect, one of the first and second inserts 31, 32 are mounted in the ferrule 7.

According to an aspect, as is disclosed in figure 3, the paint brush 1 comprises a cassette collar 7 and a ferrule 8. According to an aspect, the cassette collar 7 is connected directly to the ferrule 7 and the ferrule 7 is, in turn, directly connected to the handle 2. According to an aspect the cassette collar 7 is connected directly to the ferrule 7 and the handle 2. According to an aspect, the ferrule 7 is configured to connect the cassette collar 7 to the handle 2.

The set of inserts 3 comprises a first insert 31 and a second insert 32, as is disclosed in figure 13 - 17. The set of inserts 3 are at least partly arranged in the bottom bundle part 43 of the bundle of bristles 3, as is disclosed in figure 13 and in figure 18. The set of inserts 3 is configured to separate bristles 5 of the bundle of bristles 5 and to create voids 6 in the bundle of bristles 4. Bristles 5 of the bundle of bristles 4 constitutes the walls of the voids 6. The voids 6 extend from the first and second inserts 31, 32 in the bottom bundle part 43 into the middle bundle part 42, as is seen in figure 12. The set of inserts 3 also affect how the bristles 4 are positioned in the top bundle part 41, as is seen in figure 12 and 18. The cross sectional shape and size of the voids 6 are reduced in relation to the distance from the set of inserts 3. The further distance from the set of inserts 3, the more the bristles 5 constituting a wall of the voids 6 converges towards each other. In the top bundle part 41, the bristles 5 has converged so much that they constitute a top 6b of the voids 6, i.e. the voids 6 extend from the set of inserts 3 to the top 6b of the voids 6. The top 6b of the voids 6 is positioned (or constitutes) in the transition between top and middle bundle part 41, 42. The shape of the voids 6 are affected by and corresponds to the shape of the first and second inserts 31, 32 of the set of inserts 3. The voids 6 are according to an aspect defined as the voids 6 in the bundle of bristles 4 that substantially has the same cross sectional shape perpendicular to the length of the bristles LI as a cross sectional shape perpendicular to a length L2 of the first and/or second insert 31, 32. The thickness T6 of the voids 6 is reduced towards the top of the voids 6 as the bristles 5 converges towards each other. A shape of the voids 6 is tapered from a bottom 6a of the voids 6 towards the top 6b of the voids 6, as is disclosed in figure 18. The set of inserts 3 affect the bristles 5 of the bundle of bristles 4 also in the top bundle part 41 of the bundle of bristles 5. In the top bundle part 41, the distance between bristles 5 is affected by the set of inserts 3, even if the bristles 5 has converged so much that there are no common void 6, as is seen in figure 11 and 18.

The first insert 31 comprises a first insert surface 33a, as is disclosed in figure 8 and 9. The first insert surface 33a of the first insert 31 comprises at least two ridges 34 and at least two valleys 35, as is disclosed in figure 5-9. The at least two ridges 34 and at least two valleys 35 extending in a direction of the length L2 of the first insert 31. According to an aspect a width of the ridges 34 are at least 1mm. . According to an aspect a width of the valleys 35 are at least 1mm.

The second insert 32 comprises a second insert surface 36b. The second insert surface 36b comprises at least two ridges 37 and at least two valleys 38. The at least two ridges 37 and at least two valleys 38 extending in a direction of a length L2 of the second panel 32.

According to an aspect a width of the ridges 37 are at least 1mm. . According to an aspect a width of the valleys 38 are at least 1mm.

The set of inserts 3 are at least partly arranged in the bottom bundle part 43 of the bundle of bristles 4. The lengths L2 of the first and second inserts 31, 32 are arranged in parallel with the length LI of the bristles 5. The first insert surface 33a of the first inserts 31 is facing the second insert surface 36b of the second insert 32. The ridges 34 of the first insert surface 33a are positioned at the valleys 38 of the second insert surface 36b. The ridges 37 of the second insert surface 36b are positioned at the valleys 35 of the first insert surface 33a. At least a part of the bristles 5 of the bundle of bristles 4 is positioned between the first and second insert surfaces 33a, 36b.

The first and second insert surfaces 33a, 36b interacts with the bristles 5 that are positioned between the first insert surface 33a and the second insert surface 36b. The ridges 34, 37 and valleys 35, 38 of the first and second insert surfaces 33a, 36b increases a surface width of the first and second inserts 31, 32 in comparison to a flat insert without any ridges and valleys. The surface width of the first and second inserts 31, 32 increases the amount of bristles 5 in the bundle of bristle 4 that could be positioned at the first and second insert surfaces 33a, 36b and thus be affected by the first and second inserts 31, 32.

According to an aspect, as is disclosed in figures 5-9 and 15, the first insert 31 comprises a second insert surface 36a comprising at least two ridges 37 and at least two valleys 38 extending in a direction of the length L2 of the first insert 31, wherein the second insert surface 36a is opposite to the first insert surface 33a. By having ridges 37 and valleys 38 on the first and the second insert surfaces 33a, 36 of the first insert 31, the first inserts 31 comes into contact with a larger part of the bristles 5 of the bundle of bristles 4 and thus is configured to affect the shape of the bundle of bristles 4 on two sides.

According to an aspect, the set of inserts 3 of the paint brush 1 comprises a further first insert 31. The first insert surface 33a of the further first insert 31 is facing the second insert surface 36a of the first insert 32. The ridges 34 of the first insert surface 33a of the further first insert 31 are positioned at the valleys 38 of the second insert surface 36a of the first insert 31, as is disclosed in figure 15 an 16. The ridges 37 of the second insert surface 36a of the first insert 31 are positioned at the valleys 35 of the first insert surface 33a of the further first insert 31. At least a part of the bristles 5 of the bundle of bristles 4 are positioned between the first insert surface 33a of the further first insert 31 and the second insert surface 36a of the first insert 31.

According to an aspect, the second insert 32 comprises a first insert surface 33b the paint comprises at least two ridges 34 and at least two valleys 35 extending in the direction of the length L2 of the second insert 32, wherein the first insert surface 33b is opposite to the second insert surface 36b.

By having ridges 34 and valleys 35 on the first and the second insert surfaces 33a, 36 of the second insert 32, the second inserts 32 comes into contact with a larger part of the bristles 5 of the bundle of bristles 4 and thus are configured to affect the shape of the bundle of bristles 4 on two sides.

According to an aspect, the paint brush 1 comprises a further first or second insert 31, 32. The first insert surface 33b of the second insert 32 is facing the second insert surface 36a, 36b of the further first or second insert 31, 32. The ridges 34 of the first insert surface 33b of the second insert 32 are positioned at the valleys 38 of the second insert surface 36a, 36b of the further first or second insert 31. The ridges 37 of the second insert surface 36a, 36b of the further first or second insert 31, 32 are positioned at the valleys 35 of the first insert surface 33b of the second insert 32. At least a part of the bristles 5 of the bundle of bristles 4 are positioned between the first insert surface 33a of the further first insert 31 and the second insert surface 36a of the first insert 31.

According to an aspect the ridges 34, 37 and the valleys 35, 38 of the first and second inserts 31, 32 has a corresponding shape, as is disclosed in figure 14-16. According to an aspect the first insert 31 and the second insert 32 has the same shape, as is disclosed in figure 14 and 16.

According to an aspect, a height H of the ridges 34, 37 is at least 1 mm. According to an aspect, a height H of the ridges 34, 37 is at least 1, 5 mm. According to an aspect, the height H of the ridges 34, 37 is the distance from a center of the insert to a top of the ridges 34, 37 as is disclosed in figure 9 and 10. According to an aspect the height H of the ridges 34, 37 is the distance from a bottom of the valleys 35, 38 to the top of the ridges, as is disclosed in figure 16.

According to an aspect, a depth D1 of the valleys 35, 38 is at least 1 mm. According to an aspect, a depth D1 of the valleys 35, 38 is at least 1, 5 mm. According to an aspect the depth D1 of the valleys 35, 38 is the distance from the center of the insert to a bottom of the ridges 34, 37 as is disclosed in figure 9 and 10. According to an aspect the depth D1 of the valleys 35, 38 is the distance from the bottom of the valleys 35, 38 to the top of the ridges, as is disclosed in figure 16.

According to an aspect, the depth D1 of the valleys 35, 38 is equal to the height H of the ridges 34, 37.

According to an aspect, the valleys 35, 38 are recesses 35, 38 in a plate 39, as is disclosed in figure 19.

According to an aspect, the ridges 34, 37 extend from a plate 39 as is disclosed in figure

14-17.

According to an aspect, the valleys 35, 38 are the space between two adjacent ridges

34, 37, as is disclosed in figure 14-17.

According to an aspect, the ridges 34, 37 are the space between two adjacent valleys

35, 38 as is disclosed in figure 19.

According to an aspect, some of the ridges 34, 37 of a first or second inserts 31, 32 are positioned at ridges 34, 37 of another first or second inserts 31, 32, as is disclosed in the lower parts of figure 17. According to an aspect, some of the valleys 35, 38 of a first or second inserts 31, 32 are positioned at valleys 35, 38 of another first or second inserts 31, 32, as is disclosed in the lower parts of figure 17. According to an aspect, a cross sectional shape perpendicular to the length L2 of the first inserts 31 are a waveform as is disclosed in figure 6 and 9. According to an aspect, a cross sectional shape perpendicular to the length L2 of the first inserts 31 are a zig-zag-shape as is disclosed in figure 5, 7 and 8. According to an aspect, a cross sectional shape perpendicular to the length L2 of the second inserts 32 are a waveform. According to an aspect, a cross sectional shape perpendicular to the length L2 of the second inserts 32 are a zig-zag-shape. According to an aspect, a cross sectional shape perpendicular to the length L2 of the first and second inserts 31, 32 are a waveform. According to an aspect, a cross sectional shape perpendicular to the length L2 of the first and second inserts 31, 32 are a zig-zag-shape. According to an aspect, a cross sectional shape perpendicular to the length L2 of the first and/or second inserts 31, 32 are a waveform or a zig-zag-shape.

According to an aspect, a cross sectional shape perpendicular to the length L2 of the ridges 34, 37 of the first and/or the second inserts 31,32 are triangular, arc or rectangular. According to an aspect, a cross sectional shape perpendicular to the length L2 of the ridges 34 of the first inserts 31 are triangular, arc or rectangular as is disclosed in figure 6 - 9. According to an aspect, a cross sectional shape perpendicular to the length L2 of the ridges 37 of the second inserts 31, 32 are triangular, arc or rectangular. According to an aspect, a cross sectional shape perpendicular to the length L2 of the ridges 34, 37 of the first and the second inserts 31, 32 are triangular, arc or rectangular.

According to an aspect, a cross sectional shape perpendicular to the length L2 of the valleys 35, 38 of the first and/or the second inserts 31, 32 are triangular, arc or rectangular as is disclosed in figures 6 - 9. According to an aspect, a cross sectional shape perpendicular to the length L2 of the valleys 35 of the first inserts 31 are triangular, arc or rectangular. According to an aspect, a cross sectional shape perpendicular to the length L2 of the valleys 38 of the second inserts 32 are triangular, arc or rectangular. According to an aspect, a cross sectional shape perpendicular to the length L2 of the valleys 35, 38 of the first and the second inserts 31, 32 are triangular, arc or rectangular.

According to an aspect, the cross sectional shape perpendicular to the length L2 of the ridges 34, 37 of the first and/or the second inserts 31,32 are the same as the cross sectional shape perpendicular to the length L2 of the valleys 35,38 of the first and/or the second inserts 31,32, as is disclosed in figure 16. According to an aspect, the cross sectional shape perpendicular to the length L2 of the ridges 34, 37 of the first inserts 31 are the same as the cross sectional shape perpendicular to the length L2 of the valleys 35 of the first inserts 31. According to an aspect, the cross sectional shape perpendicular to the length L2 of the ridges 37 of the second inserts 32 are the same as the cross sectional shape perpendicular to the length L2 of the valleys 38 of the second inserts 31, 32. According to an aspect, the cross sectional shape perpendicular to the length L2 of the ridges 34, 37 of the first inserts 31 are the same as the cross sectional shape perpendicular to the length L2 of the valleys 38 of the second inserts 32. According to an aspect, the cross sectional shape perpendicular to the length L2 of the ridges 37 of the second inserts 32 are the same as the cross sectional shape perpendicular to the length L2 of the valleys 35 of the first inserts 31. According to an aspect, the cross sectional shape perpendicular to the length L2 of the ridges 34, 37 of the first and the second inserts 31,32 are the same as the cross sectional shape perpendicular to the length L2 of the valleys 35,38 of the first and the second inserts 31,32.

According to an aspect, the first insert surface 33a of the first insert 31 are positioned at a distance D2 from the second inset surface 36b of the second insert 32A, as is disclosed in figure 14 and 19. According to an aspect, the distance D2 from the first insert surface 33a of the first insert 31 to the second inset surface 36b of the second insert 32 is between 1-5 mm. According to an aspect, the distance D2 from the first insert surface 33a of the first insert 31 to the second inset surface 36b of the second insert 32 is smaller than 3 mm.

According to an aspect, a distance T between the first and second insert surfaces 33a, 36a; 33b, 36b of the same first and/or second insert 31, 32 are l-5mm. Put in another way, the thickness of the first and/or second inserts 31, 32 are between l-5mm. The distance T between the first and second insert surfaces 33a, 36a; 33b, 36b of the same first and/or second insert 31, 32 according to some aspects are different in different positions on the first and second insert surfaces 33a, 36a; 33b, 36b, as is disclosed in figure 15. The distance T between the first and second insert surfaces 33a, 36a; 33b, 36b of the same first and/or second insert 31, 32 according to some aspects are constant in different positions on the first and second insert surfaces 33a, 36a; 33b, 36b, as is disclosed in figure 8 and 9.

The set of inserts 3 is configured to create voids 6 between bristles 5 of the bundle of bristles 4, as is disclosed in figure 12 and 18. Each void 6 extend in the direction of the length LI of the bristles 5 from either the first or the second insert 31, 32 into the middle bundle part 32 of the bundle of bristles 4.

According to an aspect, the voids 6 comprises a base 6a having a thickness T6 and a width at the first or second insert 31, 32 and a length L6 extending from the first or second insert 31,32 towards the top bundle part 41 of the bundle of bristles 4. According to an aspect the thickness of the base 6a of the voids T6 are l-5mm. The thickness of the voids 6 is related to the thickness T of the first or second insert 31, 32 that the void 6 extends from. The thickness of the voids 6 at the bottom 6a corresponds to the thickness T of the first or second insert 31, 32 that the void 6 extends from. The thickness of the voids 6 at the bottom 6a are according to an aspect substantially equal to the thickness T of the first or second insert 31, 32 that the void 6 extends from. The bristles 5 constituting the walls of the voids 6 generate a capillary force between them and paint could be stored in the voids 6. If the thickness of the voids 6 is to large, i.e. if the distance between the bristles 5 constituting opposite walls of the voids 6, the capillary force will be overcome by the gravity force acting on the paint. Paint that is picked-up by the paint brush 1 when it is dipped in paint, will be sucked into the bundle of bristles 4 and partly stored in the voids 6. The voids 6 will be filled with paint from the top 6b of the voids 6 to a distance towards the bottom 6b of the voids 6 as long as the thickness T6 is below a threshold at which the gravity forces overcomes the capillary forces. Paint that is sucked into the voids 6 are first sucked up by capillary forces between the bristles in the top bundle part 41. The larger volume of the voids 6 that has a thickness T6 that is below the threshold, the more paint could be picked-up and stored in the paint brush 1. The ridges and valleys 34, 37; 35, 38 of the set of inserts 3, increases the area that each first and second inserts 31, 32 are in contact with bristles 5. By increasing this area, the set of inserts 3 comes into contact with a larger part of the bristles 5 in the bundle of bristles 4 (compared to inserts without ridges and valleys) and thereby creates larger volumes of the voids 6 that has a thickness that is below the threshold. Put in another way, the possible paint pick-up of the paint brush 1 is increased.

According to an aspect, the thickness T6 of the base 6a is 3 mm or smaller. According to an aspect, the thickness T6 of the base 6a is 2 mm or smaller.

According to an aspect, the ridges 34, 37 and the valleys 35, 38 extend across the whole length L2 of the first and/or second insert 31, 32.

According to an aspect, a distance between two adjacent ridges 34, 37 are at least 3 mm. According to an aspect, a distance between two adjacent ridges 34, 37 are at least 1 mm.

According to an aspect, a distance between two adjacent the valleys 35, 38 are at least 3 mm. According to an aspect, a distance between two adjacent the valleys 35, 38 are at least 1 mm. According to an aspect, the number of ridges 34, 37 are different from the number of the valleys 35,38 of the first or second insert surface 33a, 33b; 36a, 36b.

The ridges and valleys 34, 37; 35, 38 of the set of inserts 3, increases the area of each first and second inserts 31, 32 that are in contact with bristles 5. By increasing the area of each first and second inserts 31, 32, the thickness of the first and second inserts 31, 32 could be adapted and optimized in relation to capillary forces without a need to increase the number of first and second inserts 31, 32. This also makes it possible to increase the paint pick-up without increasing the number of insert of the paint brush 1 and thereby make the production more complex.

Paint that is picked-up by the paint brush 1 and stored in the voids 6, will also be wetting the walls of the voids 6, i.e. the bristles 5, and be sucked in to smaller voids between bristles 5 by capillary forces. As the area of the walls of the voids 6 are increased, also the paint pick-up increased by this way of paint pick-up.

If a painter should paint with the paint brush 1 according to the above, the painter starts by dipping the paint brush 1 in paint. Often the top and middle bundle part 41, 42 is dipped in paint. Paint is sucked in to the small voids between the bristles 5 at the top of the top bundle part 41. Thereafter the paint is sucked further up in the bundle of bristles 4 by capillary forces and sucked into the voids 6 in the middle bundle part 42. The bristles 5 constituting the walls of the voids 6 picks-up paint by wetting of the bristles 5 and by capillary forces sucking the paint into smaller voids between the bristles 5. The set of inserts 3 according to the above increases the amount of paint that the paint brush 1 in configured to pick-up.

The person skilled in the art realizes that the present disclosure is not limited to the preferred embodiments described above. The person skilled in the art further realizes that modifications and variations are possible within the scope of the appended claims. Additionally, variations to the disclosed embodiments can be understood and effected by the skilled person in practicing the claimed disclosure, from a study of the drawings, the disclosure, and the appended claims.