SE543897C2

SE543897C2 - Paint brush with a cassette collar with inward extending parts

Info

Publication number: SE543897C2
Application number: SE2050363A
Authority: SE
Inventors: Patrik Salim
Original assignee: Orkla House Care Ab
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2021-09-14
Also published as: EP4125494A1; WO2021201743A1; SE2050363A1; EP4125494A4

Abstract

The disclosure relates to a paint brush (1), comprising a handle (2), a cassette collar (3) and a bundle of bristles (4) comprising a plurality of bristles (5), wherein the cassette collar (3) is connected to the handle (2), the cassette collar (3) comprises a wall (31) defining a recess (32) and one or more inward extending parts (33) connected to the wall (31) and positioned in the recess (32), the bundle of bristles (4) comprises a top bundle part (41), a bottom bundle part (43) and a middle bundle part (42) positioned between the top and bottom bundle parts (41,43), the plurality of bristles (5) being arranged such that they extend from the bottom bundle part (43) to the top bundle part (41), the bundle of bristles (4) is connected to the cassette collar (3), at least by that at least a portion of the bottom bundle part (43) is arranged in said recess (32), and the inward extending parts (33) extends from the wall (31) and protrudes into the bottom bundle part (43) arranged in the recess (32) and are configured to increase a circumference (A) of the middle bundle part (42) to be larger than a circumference (B) of the recess.

Description

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. theamount of paint that the paint brush pick-up when it is dipped in paint and the amount ofpaint 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 lt is an object of the present disclosure to mitigate, alleviate or eliminate one or moreof the above-identified deficiencies and disadvantages in the prior art and solve at least the above-mentioned problem.

The inventors haeve realized that a paint brush pick-up paint both by adhesion/wettingof the paint to the bristles and by capillary forces that is created between bristles and thatsucks the paint into the bundle of bristles. There are a lot of focus on how to increase thepaint 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 inlays/inserts separating the bristles in abundle of bristles. The amount of paint that could be picked up by the tip of the bundle ofbristles are limited by the laws of physics, as an example the capillary forces in relation to thegravity forces. However, the inventors have realized that the paint brush not only picks uppaint from the tip of the bundle of bristles, but also from the sides of the bundle of bristles,also above the distance from the tip at which the capillary forces could suck paint into thebundle of bristles. The sides ofthe bundle of bristles picks-up paint by capillary forces and y wetting when paint makes contact with the bundle of bristles.

According to a first aspect there is provided a paint brush, comprising a handle, acassette collar and a bundle of bristles comprising a plurality of bristles, wherein the cassettecollar is connected to the handle, the cassette collar comprises a wall defining a recess andone or more inward extending parts connected to the wall and positioned in the recess, thebundle of bristles comprises a top bundle part, a bottom bundle part and a middle bundle partpositioned between the top and bottom bundle parts, the plurality of bristles being arrangedsuch that they extend from the bottom bundle part to the top bundle part, the bundle ofbristles is connected to the cassette collar, ta-t--š-east--by t-h-a-t--at least a portion of the bottombundle part šfæ-Étgarranged in the recess, and the inward extending parts extends from the wall and protrudes into the bottom bundle part arranged in the recess such that andate a circumference ofthe middle bundle part »which is reot in fíiretït contact »with the šrttﬂaard extendšnß parts, äs increased to be larger than a circumference of the recess.

By increasing the circumference ofthe middle bundle part, the area that is exposed topaint when the paint brush is dipped in paint is increased. The area being the circumferencetimes the length ofthe middle bundle part. The increased area increases the contact area thatis exposed to paint when the paint brush is dipped in paint and thereby increases the possiblepaint pick up by the paint brush. The increased area increases the ability of the middle bundlepart to pick up paint by capillary forces, wetting and direct contact with the paint. The paint ispicked up from the sides of the bundle of bristles in addition to the paint that is picked upfrom the tip ofthe paint brush. The inward extending parts protrudea into the bundle ofbristles such that they effect the circumference of the bottom bundle part and the middlebundle part that is not in direct contact with the inward extending parts. The middle bundle part also pick-up paint by paint entering into voids at the surface of the middle bundle part.

According to some embodiments, the inward extending parts and the wall are integralparts. By being integral parts, the wall and the inward extending parts could be made in a robust and efficient way.

According to some embodiments, the inward extending parts are fused or adhesively connected to the wall.

According to some embodiments, the inward extending parts extends from a bottomedge to a top edge of the wall, wherein the top edge of the wall defines the opening of the recess. By the inward extending parts extending over the whole length/depth ofthe recess and by interacting with the bristles over as long distance as possible the inward extending parts could affect the circumference more and at a further distance from the cassette collar.According to some embodiments, the recess is a through going hole.

According to some embodiments, the inward extending parts having a cross sectionalshape with a base and a protruding surface, wherein a width of the base is smaller than a crosssectional length ofthe protruding surface. By having a protruding surface that is larger thanthe base, the circumference that is in contact with the bottom bundle part is increased as the base is connected to the wall of the cassette collar According to some embodiments, the inward extending parts haxfe-äfæ-a-s a height of at least 1,-,-5 mm, preferably at least 2 mm, extending from the wall into the bottom bundle part.

According to some embodiments, the inward extending parts extend between 155 mm to 5 mm into the bottom bundle part in relation to the wall.

According to some embodiments, the inward extending parts a triangular, square and/or wavy cross sectional shape.

According to some embodiments, the circumference of the middle bundle part is at least 20% larger than the circumference of the recess.

According to some embodiments, the circumference of the middle bundle part is-betw-eeef:--í-Qéíšﬁ9%-åa-rge-r-tha-n--the»-sirss:nfeffs-re-nee--såt-he-r-eeessï-prefeﬁab-š-gf-between 20-60% larger than the circumference ofthe recess.

According to some embodiments, the inwards extending parts covers at least half the circumference of the wall.

According to some embodiments, the inwards extending parts covers at least 75% of the circumference of the wall.According to some embodiments, the inwards extending parts covers the wall.

According to some embodiments, the middle bundle part is located at a distance of at least 1 cm from the cassette collar.

According to some embodiments, the middle bundle part is located at a distance of at least 2 cm from a top end ofthe bundle of bristles.

According to some embodiments, the length of the middle bundle part is at least half the length of the bundle of bristles.

According to some embodiments, the length of the bottom bundle part corresponds tothe depth ofthe recess and the length ofthe top bundle part corresponds to the length towhich the bundle of bristles can pick up paint from the tip ofthe bundle of bristles.

According to some embodiments, a depth ofthe recess is at least 7mm.According to some embodiments, the depth of the recess is between 7mm - 15mm.

According to some embodiments, a depth of the inward extending parts corresponds to the depth ofthe recess.

According to some embodiments, the wall of the recess is parallel with the plurality of bristles in the bundle of bristles.

According to some embodiments, the cassette collar is arranged to be mechanically connected to the brush handle.

According to some embodiments, the cassette collar and/or the plurality of bristles are made from a thermoplastic polymer.

According to some embodiments, the paint brush comprises an insert at least connected to the bundle of bristle.

According to some embodiments, the paint brush comprises a ferrule configured to connect the cassette collar to the handle.

According to some embodiments, the inward extending parts protrudes into thebundle of bristles in a direction that is perpendicular to the extension of the bristles in the bundle of bristles.

According to some embodiments, the wall and the inward extending parts defines asecond recess that is a sub-part of the recess, wherein the circumference of the second recessis larger than the circumference ofthe recess. The second recess is the opening that the bottom bundle part is arranged in.

According to some embodiments, the cross sectional shape of the second recess substantially corresponds to the cross sectional shape of the middle bundle part.

According to some embodiments, the cross sectional shape of the second recess has a gear shape.

According to some embodiments, the cross sectional shape of the second recess has the shape of a circular or e||iptica| gear.

The present disclosure will become apparent from the detailed description givenbelow. The detailed description and specific examples disclose preferred embodiments of thedisclosure by way of illustration only. Those skilled in the art understand from guidance in thedetailed 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 theparticular component parts of the device described or steps of the methods described sincesuch device and method may vary. lt is also to be understood that the terminology usedherein is for purpose of describing particular embodiments only, and is not intended to belimiting. lt should be noted that, as used in the specification and the appended claim, thearticles "a", "an", "the", and "said" are intended to mean that there are one or more oftheelements unless the context explicitly dictates otherwise. Thus, for example, reference to "aunit" 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.

Terminology -- The term "paint pick-up" is to be interpreted as the volume or weight ofpaint that the paint brush is able to pick-up when it is dipped in paint and to hold in the bundle of bristles.

Brief descriptions of the drawings The above objects, as well as additional objects, features and advantages of thepresent disclosure will be more fully appreciated by reference to the following illustrative andnon-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 ofthe present disclosure.

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

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

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

Figure 5 shows a side view of an inward extending part of a cassette co||ar according to an embodiment of the present disclosure.

Figure 6 shows a perspective view of an inward extending part of a cassette co||ar according to an embodiment of the present disclosure.

Figure 7 shows a cross sectional view of a wall of a cassette co||ar according to an embodiment of the present disclosure.

Figure 8 shows a cross sectional view of a cassette co||ar according to an embodiment of the present disclosure.

Figure 9 shows a cross sectional view of a cassette co||ar according to an embodiment of the present disclosure.

Figure 10 shows a cross sectional view of a cassette co||ar according to an embodiment of the present disclosure.

Figure 11 shows a perspective view of a wall of a cassette co||ar according to an embodiment of the present disclosure.

Figure 12 shows a perspective view of a cassette co||ar according to an embodiment of the present disclosure.

Figure 13 shows a side view of an inward extending part of a cassette co||ar according to an embodiment of the present disclosure.

Figure 14 shows a side view of an inward extending part of a cassette co||ar according to an embodiment of the present disclosure.

Figure 15 shows a side view of an inward extending part of a cassette co||ar according to an embodiment of the present disclosure.

Figure 16 shows a side view of an inward extending part of a cassette co||ar according to an embodiment of the present disclosure.

Figure 17 shows a cross sectional view of a paint brush according to an embodiment of the present disclosure.

Figure 18 shows a cross sectional view along the line C-C in figure 17 of a top bundle part of the bundle of bristles according to an embodiment of the present disclosure.

Figure 19 shows a cross sectional view along the line B-B in figure 17 of a middle bundle part ofthe bundle of bristles according to an embodiment of the present disclosure.

Figure 20 shows a cross sectional view along the line A-A in figure 17 of a bottombundle part of the bundle of bristles arranged in a cassette collar according to an embodiment of the present disclosure.

Detailed description The present disclosure will now be described with reference to the accompanyingdrawings, in which preferred example embodiments of the disclosure are shown. Thedisclosure may, however, be embodied in other forms and should not be construed as limitedto 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 paint brush comprises a handle 2, a cassette collar3 and a bundle of bristles 4. 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.

The bundle of bristles 4 comprises a plurality of bristles 5. The cassette collar 3 isconnected to the handle 2. According to an aspect the cassette collar 3 is connected directly tothe handle 2, as is disclosed in figure 2. The bundle of bristles 4 comprises a top bundle part41, a bottom bundle part 43 and a middle bundle part 42 positioned between the top andbottom bundle parts 41,43, as is disclosed in figure 4. The plurality of bristles 5 being arrangedsuch that they extend from the bottom bundle part 43 to the top bundle part 41. According toan aspect, each bristles 5 in the bundle of bristle comprises a part that is positioned in each of the bundle parts 41, 42, 43.

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

The cassette collar 3 comprises a wall 31 and one or more inward extending parts 33,as is disclosed in figure 8, 9, 10 and 12. The wall 31 defines a recess 32. Put in another way, thewall 31 encircles or enclose an area and thereby defines the recess 32, as is disclosed in figure11. The inward extending parts 33 are connected to the wall 31 and positioned in the recess32.

According to an aspect the inward extending parts 33 and the wall 31 are integral parts, as is disclosed in figure 9.

According to an aspect the inward extending parts 33 are fused or adhesively connected to the wall 31, as is disclosed in figure 9 and 10.

According to an aspect, as is disclosed in figure 7-10, the recess 32 is a through going hole 32.

According to an aspect the inwards extending parts 33 covers at least half the circumference of the wall 31.

According to an aspect the inwards extending parts 33 covers at least 75% of the circumference of the wall 31.According to some embodiments, the inwards extending parts 33 covers the wall 31.

According to an aspect the cassette collar 3 comprises inward extending parts 33ahaving a first cross sectional shape and size and/or inward extending parts 33b having a second cross sectional shape and/or size, as is discloses in figure 10.

As is disclosed in figure 5, the inward extending parts 33 comprises a base 331 having awidth W. The inward extending parts 33 a height H, the height being the distancefrom the base 331 to a top of the inward extending parts 33. The inward extending parts 33comprises a protruding surface 332 with a depth D2, as is disclosed in figure 6, and a length L.The length L ofthe protruding surface 332 is the sum of the lengths L1 and L2 of the right andleft sub-parts ofthe protruding surface 332 as disclosed in figure 5 and 6. The depth D2 is thedistance that the inward extending parts 33 could be in contact with the bristles 5 in the direction of the length ofthe bristles 5.

According to an aspect, a depth D1 ofthe recess 32 is at least 7mm. According to anaspect, the depth D1 ofthe recess 32 is between 7mm - 15mm. According to an aspect, a depth D2 of the inward extending parts 33 corresponds to the depth ofthe recess 32.

According to an aspect, the inward extending parts 33 have a cross sectional shapewith a base 331 and a protruding surface 332. According to an aspect the width W of the base 331 is smaller than a cross sectional length L of the protruding surface 332.

According to an aspect the inward extending parts 33 ljgyghaæ a triangular crosssectional shape, as is disclosed in figure 15. According to an aspect the inward extending parts33 mat-tia square cross sectional shape, as is disclosed in figure 14. According to an aspectthe inward extending parts 33 a wavy cross sectional shape, as is disclosed in figure16. According to an aspect the inward extending parts 33 hashanygma triangular cross sectional shape with a rounded tip, as is disclosed in figure 13.

According to an aspect the cassette collar 3 is arranged to be mechanically connected to the handle 2.

The bundle of bristles 4 is connected to the cassette collar 3. The bundle of bristles 4 isat least connected to the cassette collar 3 by that at least a portion ofthe bottom bundle part 43 is arranged in the recess 32, as is disclosed in figure 17 and 20.

The inward extending parts 33 are positioned in the recess 32. The inward extendingparts 33 and reduces an opening 38 ofthe cassette collar 3. The inward extending parts 33extends from the wall 31. The inward extending parts 33 extends from the wall 31 into therecess 32. The inward extending parts 33 protrudes into the bottom bundle part 43 arrangedin the recess 32. The inward extending parts 33 protrudes into the bundle of bristles 4 and separate bristles 5 from other bristles 5 ofthe bundle of bristles 4, as is disclosed in figure 20.

The recess 32 has a circumference C2 as is disclosed in figure 7. The circumference C2 of the recess 32 corresponds to a length of the wall 31.

The bundle of bristles 4 has according to an aspect different circumferences from itstop to its bottom. The bristles 5 in the bundle of bristles 4 are affected by the shape of thewall 31 and the shapes ofthe inward extending parts 33. The cross sectional shape of thebundle of bristles 4 are different along the length ofthe bundle of bristles 4. Put in anotherway, the cross sectional shape of the bottom of the bundle of bristles 4 is different from the cross sectional shape of the top of the bundle of bristles 4, as is schematically disclosed in figure 18 and 20. Figure 18 discloses a cross sectional view along the line C-C in figure 17 andthe figure 20 discloses a cross sectional view along the line A-A in figure 17. The circumferenceof the bottom bundle part 43 of the bundle of bristles 3 substantially corresponds to acircumference C3 ofthe cassette collar 3 defined by the wall 31 and the protruding surfaces 332 ofthe inward extending parts 33, as is schematically disclosed in figure 8.

The cross sectional shape ofthe bottom bundle part 43 corresponds to the crosssectional shape of the middle bundle part 42 in the transition between the bottom and middlebundle part 43, 42. The cross sectional shape ofthe top bundle part 41 corresponds to thecross sectional shape ofthe middle bundle part 42 in the transition between the top andmiddle bundle part 43, 42. The cross sectional shape ofthe middle bundle part 42 is differentat the transition from the bottom bundle part 43 from the cross sectional shape at thetransition to the top bundle part 41. This is due to the fact that the bristles 5 extend from thetop to the bottom of the bundle of bristles 4 and thus each bristle 5 has a part that is locatedin the bottom bundle part 43, a part that is located in the middle bundle part 42 and a partthat is located in the top bundle part 41.

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

The inward extending parts 33 are configured to increase a circumference C1 of themiddle bundle part 42 to be larger than a circumference C2 ofthe recess 32. The inwardextending parts 33 increases the circumference C3 ofthe cassette collar 3 that is in contactwith the bottom bundle part 43 ofthe bundle of bristles 4. Put in another way, thecircumference ofthe parts of the cassette collar that is in contact with the bundle of bristles 4is larger than the circumference C2 ofthe recess 32 ofthe cassette collar 3. The circumferenceof the bottom bundle part 43 substantially corresponds to the circumference of the parts ofthe cassette collar 3 that is in contact with the bundle of bristles 4, i.e. parts ofthe wall 31 andthe protruding surface 332 ofthe inward extending parts 33. The parts ofthe bundle ofbristles 4 that is not in direct contact with the cassette collar 3 could be re-arranged in thebundle of bristles 4 and the cross sectional shape changes. The inward extending parts 33increases- the circumference C3 of the cassette collar 3 that is in contact with the bottombundle part 43 so much in relation to the circumference C2 ofthe recess 32, such that also the circumference C1 of the middle bundle part 42 is larger than the circumference C2 ofthe recess 32. According to an aspect the circumference Cl ofthe middle bundle part 42 isreduced in relation to the distance from the cassette collar 3 and the circumference Cl of themiddle bundle part 42 in the transition to the top bundle part 41 is larger than thecircumference C2 of the recess 32. The larger the ratio of the length L of protruding surface332 is in relation to the width W ofthe base 331, i.e. L/W, the larger the circumference Cl of the middle bundle part 43 will be in relation to the circumference ofthe recess 32.

According to an aspect the inward extending parts 33 increases- the circumference Clof the middle bundle part 42 by making the surface uneven in a radial direction, i.e. in adirection from the center ofthe bundle of bristles 4 and outwards. The length ofthe unevensurface is longer than if the surface would have been straight and smooth. The inwardextending parts 33 separate the bristles 5 at the outer surface ofthe middle bundle part 42from one another and creates voids 42l at the surface of the middle bundle part 42, as isdisclosed in figure l9. The figure 19 discloses a cross sectional view along the line B-B in figurel7. When the paint brush l is dipped in paint, paint will enter into these voids 42l and bepicked-up by the paint brush l. The larger circumference Cl thus creates a larger surface onthe middle bundle part 42, at which paint could be sucked into the bundle of bristles by capillary forces and wetting, and creates the voids 42l, that could pick-up even further paint.

According to an aspect the inward extending parts 33 are configured to increase acircumference ofthe top bundle part 4l to be larger than the circumference C2 of the recess32. The circumference to the top bundle part 4l is larger than the circumference C2 of the recess 32.

According to an aspect the inward extending parts 33 extends- from a bottom edge to atop edge of the wall 3l, wherein the top edge ofthe wall 31 defines the opening ofthe recess 32 as is disclosed in figure l2.

According to an aspect the inward extending parts 33 protrudes into the bundle ofbristles 4 in a direction that is perpendicular to the extension ofthe bristles in the bundle ofbristles 4. Put in another way, the inward extending parts 33 extends into the bundle of bristles 4 in a radial direction of the bristles 5.

According to an aspect the wall 31 and the inward extending parts 33 define-s a secondrecess 38 that is sub-part ofthe recess 32. The circumference C3 of the second recess 38corresponds to the circumference C3 defined by the wall 31 and the protruding surfaces 332 of the inward extending parts 33, as is schematically disclosed in figure 8 The circumference C3 of the second recess 38 is larger than the circumference C2 of the recess 32.

According to an aspect the cross sectional shape of the second recess 38 substantially corresponds to the cross sectional shape of the middle bundle part 42.

According to an aspect the cross sectional shape of the second recess 38 has a gearshape. According to an aspect the cross sectional shape ofthe second recess 38 has the shapeof a circular gear. According to an aspect the cross sectional shape of the second recess 38 has the shape of an e||iptica| gear.

According to an aspect the inward extending parts 33 have-hast a height H of at leastlgäï-å mm. According to an aspect the inward extending parts 33 havehas- a height H of at least2 mm, According to an aspect the height H of the inward extending parts 33 extends from the wall 31 into the bottom bundle part 43.

According to an aspect the inward extending parts 33 extend between låfâ mm to 5mm into the bottom bundle part 43 in relation to the wall 31.

According to an aspect the circumference ofthe middle bundle part 42 is at least 10%larger than the circumference of the recess 32. According to an aspect the circumference of the middle bundle part 42 is at least 20% larger than the circumference of the recess 32.

According to an aspect the circumference of the middle bundle part 42 is between 10-60% larger than the circumference of the recess 32. According to an aspect the circumferenceof the middle bundle part 42 is between 20-60% larger than the circumference ofthe recess According to an aspect the circumference ofthe bottom bundle part 43 is at least 10%larger than the circumference of the recess 32. According to an aspect the circumference of the bottom bundle part 43 is at least 20% larger than the circumference of the recess 32.

According to an aspect the circumference ofthe bottom bundle part 43 is between 10-80% larger than the circumference ofthe recess 32. According to an aspect the circumferenceof the bottom bundle part 43 is between 20-80% larger than the circumference ofthe recess According to an aspect the circumference of the top bundle part 41 is at least 5% largerthan the circumference of the recess 32. According to an aspect the circumference ofthe bottom bundle part 43 is at least 10% larger than the circumference of the recess 32.

According to an aspect the circumference of the bottom bundle part 43 is between 5-40% larger than the circumference ofthe recess 32. According to an aspect the circumference of the top bundle part 41 is between 5-30% larger than the circumference of the recess 32.

According to an aspect the middle bundle part 42 is located at a distance of at least 1cm from the cassette collar 3. Put in another way, the transition from the bottom bundle part43 to the middle bundle part 42 is located at a distance of at least 1 cm from the cassette collar 3.

According to an aspect the middle bundle part 41 is located at a distance of at least 2cm from a top end of the bundle of bristles 4. Put in another way, the transition from the topbundle part 41 to the middle bundle part 42 is located at a distance of at least 2 cm from thetop ofthe bundle of bristles 4.

According to an aspect the length ofthe middle bundle part 42 is at least halfthelength ofthe bundle of bristles 4.

According to an aspect the top bundle part 41 is the part ofthe bundle of bristles 4 inwhich paint could be picked up by capillary forces from the tip of the bundle of bristles 4.According to an aspect the top bundle part 41 and the middle bundle part 42 are the parts ofthe paint brush 1 that is intended to be dipped in paint. According to an aspect the top bundlepart 41 and the middle bundle part 42 are the parts of the paint brush 1 that is configured tobe dipped in paint.

According to an aspect the wall 31 of the recess 32 is parallel with the plurality of bristles 5 in the bundle of bristles 3, as is disclosed in figure 2 and 3.

According to an aspect the handle 2 and/or the cassette collar 3 and/or the plurality of bristles 5 are made from a thermoplastic polymer.

According to an aspect the paint brush 1 comprises an insert at least connected to the bundle of bristles 4.

When a painter paints a surface with a paint brush he/she starts by dipping the paintbrush 1 in the paint. The paint interacts with the bundle of bristles 4 and the paint brush 1 pick-up paint and stores it in the bundle of bristles 4 of the paint brush 1. When the paintbrush 1 is pressed towards a surface, the paint is released and the surface is painted. lt willthus be possible to paint a larger surface with the paint brush 1 with an increased paint pick-up in comparison to a similar paint brush without the increased circumference Cl. By similar is here meant a paint brush with the corresponding size and mix of bristles.

As the top bundle part 41 is dipped in paint, capillary forces and wetting will suck paintinto the top bundle part 41 from the top of the bundle of bristles 4. ln addition, paint will bepicked up from the sides ofthe top bundle part 41. As the paint brush 1 is dipped further intothe paint, also the middle bundle part 42 of the paint brush 1 will be immersed in the paintand start to interact with the paint. Capillary forces and wetting effects will suck paint into themiddle bundle part 42 from the sides, i.e. from the outer surface ofthe middle bundle part 42,and further paint will be picked up by the paint brush 1. By being sucked in is meant that paintis sucked into the bundle of bristles 4 and positioned in voids between the bristles 5 in themiddle bundle part 42. ln addition to the paint that is sucked into the bundle of bristles 4,paint will also enter into the voids 421 at the surface ofthe middle bundle part 42. As thesurface area of the middle bundle part 42 is increased by increasing the circumference Cl ofthe middle bundle part 42, in comparison to a similar paint brush without any inwardextending parts, the paint pick-up by capillary forces and wetting will be increased. ln additionto this, the inward extending parts 33 interacts with the bristles 5 of the bundle of bristles tocreate voids 421 at the surface ofthe middle bundle part 42. The voids 421 are configured tostore paint and the possible paint pick-up by the paint brush 1 is thus even further increasedby the inward extending parts 33. The inward extending parts 33 will thus increase the paintpick-up of a paint brush without increasing the size of the paint brush or the amount of bristles 5 in the bundle of bristles 5.

To manufacture a paint brush 1 according to the above, bristles 5 are aligned andmixed into a bundle. The bottom ends ofthe bristles 5 in bundle are thereafter pressed intothe recess 32 with the inward extending parts 33 of the cassette collar 3. The amount ofbristles 5 are adapted to the size ofthe recess 32 and the inward extending parts 33 such thatit together with the inward extending parts 33 fills the recess 32. As the bristles 5 are arrangedin the cassette collar 3 it creates a bundle of bristles 5 that has a corresponding shape as thecassette collar 3. The bristles 5 are positioned between the inward extending parts 33 and fill-sout gaps between the inward extending parts 33 and thereby the inward extending parts 33extends into the bundle of bristles 4 and affects the circumference of the bundle of bristles 4 at least in the bottom bundle part 43 and the middle bundle part 41.

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

Claims

1. A paint brush (1), comprising a handle (2), a cassette collar (3) and a bundle of bristles (4) comprising a plurality of bristles (5), wherein the cassette collar (3) is connected tothe handle (2), the cassette collar (3) comprises a wall (31) defining a recess (32) andone or more inward extending parts (33) connected to the wall (31) and positioned inthe recess (32), the bundle of bristles (4) comprises a top bundle part (41), a bottombundle part (43) and a middle bundle part (42) positioned between the top and bottombundle parts (41, 43), the plurality of bristles (5) being arranged such that they extendfrom the bottom bundle part (43) to the top bundle part (41), the bundle of bristles (4)is connected to the cassette collar (3) , at least by that at least a portion of the bottombundle part (43) is arranged in said recess (32), and the inward extending parts (33)extends from the wall (31) and protrudes into the bottom bundle part (43) arranged inthe recess (32) and are configured to increase a circumference (C1) ofthe middle bundle part (42) to be larger than a circumference (C2) ofthe recess (32).

2. The paint brush (1) according to claim 1, wherein the inward extending parts (33) and the wall (31) are integral parts.

3. The paint brush (1) according to claim 1, wherein the inward extending parts (33) are fused or adhesively connected to the wall (31).

4. The paint brush (1) according to any of the preceding claims, wherein the inward extending parts (33) extends from a bottom edge to a top edge of the wall, wherein the top edge of the wall defines the opening of the recess (32).

5. The paint brush (1) according to any of the preceding claims, wherein the recess (32) is a through going hole (32).

6. The paint brush (1) according to any of the preceding claims, wherein the inward extending parts (33) have a cross sectional shape with a base (331) and a protrudingsurface (332), wherein a width (W) ofthe base (331) is smaller than a cross sectional length (L) of the protruding surface (332).

7. The paint brush (1) according to any ofthe preceding claims, wherein the inward extending parts (33) has a height (H) of at least 1,5 mm, preferably at least 2 mm, extending from the wall (31) into the bottom bundle part (43).

8. The paint brush (1) according to any ofthe preceding claims, wherein the inwardextending parts (33) extend between 1, 5 mm to 5 mm into the bottom bundle part(43) in relation to the wall (31).

9. The paint brush (1) according to any ofthe preceding claims, wherein the inwardextending parts (33) has a triangular, square or wavy cross sectional shape.

10. The paint brush (1) according to any of the preceding claims, wherein thecircumference ofthe middle bundle part (42) is at least 10% larger than thecircumference of the recess (32), preferably at least 20% larger than the circumferenceof the recess (32).

11. The paint brush (1) according to any of the preceding claims, wherein thecircumference ofthe middle bundle part (42) is between 10-60% larger than thecircumference ofthe recess (32), preferably between 20-60% larger than thecircumference of the recess (32).

12. The paint brush (1) according to any ofthe preceding claims, wherein the inwardsextending parts (33) covers at least half the circumference of the wall (31).

13. The paint brush (1) according to any ofthe preceding claims, wherein the inwardsextending parts (33) covers at least 75% of the circumference of the wall (31).

14. The paint brush (1) according to any ofthe preceding claims, wherein the middlebundle part (42) is located at a distance of at least 1cm from the cassette collar (3).The paint brush (1) according to any ofthe preceding claims, wherein the middlebundle part (41) is located at a distance of at least 2cm from a top end ofthe bundle ofbristles (4).

15. The paint brush (1) according to any ofthe preceding claims, wherein the length of themiddle bundle part (42) is at least half the length ofthe bundle of bristles (4).

16. The paint brush (1) according to any ofthe preceding claims, wherein a depth (D1) ofthe recess (32) is at least 7mm.

17. The paint brush (1) according to any ofthe preceding claims, wherein the depth (D1) ofthe recess (32) is between 7mm - 15mm.

18. The paint brush (1) according to any of the preceding claims, wherein a depth (D2) ofthe inward extending parts (33) corresponds to the depth of the recess (32).

19. The paint brush (1) according to any of the preceding claims, wherein the wall (31) of the recess (32) is parallel with the plurality of bristles (5) in the bundle of bristles (3).

20. The paint brush (1) according to any ofthe preceding claims, wherein the cassettecollar (3) is arranged to be mechanically connected to the handle (2).

21. The paint brush (1) according to any ofthe preceding claims, wherein the cassettecollar (3) and/or the plurality of bristles (4) are made from a thermoplastic polymer.The paint brush (1) according to any of the preceding claims, further comprising aninsert at least connected to the bundle of bristles (4).

22. The paint brush (1) according to any ofthe preceding claims, comprising a ferrule (7)configured to connect the cassette collar (3) to the handle (2).

23. The paint brush (1) according to any ofthe preceding claims, wherein the inwardextending parts (33) protrudes into the bundle of bristles (4) in a direction that isperpendicular to the extension ofthe bristles in the bundle of bristles (4).

24. The paint brush (1) according to any ofthe preceding claims, wherein the wall (31) andthe inward extending parts (33) defines a second recess (38) that is sub-part of therecess (32), wherein the circumference (C3) of the second recess (38) is larger than thecircumference (C1)ofthe recess (32).

25. The paint brush (1) according to claim 25, wherein the cross sectional shape ofthesecond recess (38) substantially corresponds to the cross sectional shape of the middlebundle part (42).

26. The paint brush (1) according to claim 25 or 26, wherein the cross sectional shape ofthe second recess (38) has a gear shape.

27. The paint brush (1) according to any of claims 25-27, wherein the cross sectional shape of the second recess (38) has the shape of a circular or elliptical gear.