mascara applicator

Abstract

A mascara brush includes bristles having a solid round or oval cross section with a diameter of about 6 mils, and a twisted wire core holding the bristles, the twisted wire core having 11 to 13 bristles per turn (equivalent to 210 to 270 bristles per standard size 27 mm to 28 mm brush), and the mascara brush has an average brush diameter of 7.4 mm to 8.2 mm.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of U.S. Patent Application No. 18 / 105196, filed February 2, 2023, and French Patent Application Publication No. 2303943, filed April 20, 2023, the disclosures of which are incorporated herein by reference in their entireties. Summary of the Invention

[0002] In one embodiment, a mascara brush comprises bristles having a solid round or solid oval cross section with a diameter of about 6 mils, and a twisted wire core holding the bristles, the twisted wire core having 11 to 13 bristles per turn, and the brush having an average brush diameter of 7.4 mm to 8.2 mm.

[0003] In one embodiment, the bristles include rounded ends utilizing post-processing techniques such as grinding or heating.

[0004] In one embodiment, the bristles include straight ends.

[0005] In one embodiment, the wire has a diameter of from 0.5 mm to 0.9 mm.

[0006] In one embodiment, the brush has an envelope shape selected from a cylindrical portion with a truncated cone portion, two truncated cone portions, a single truncated cone portion, a single cylindrical portion, and an oval, spirally cut cylindrical portion.

[0007] In one embodiment, about 6 mils includes from 5.7 mils to 6.3 mils.

[0008] In one embodiment, the brush has a circular cross-sectional shape.

[0009] In one embodiment, the brush has a cross-sectional shape that includes straight sides.

[0010] In one embodiment, the package comprises the mascara brush of claim 1, a handle connected to one end of the mascara brush, a cap connected to a second end of the handle, and a container containing mascara.

[0011] In one embodiment, the bristles include rounded ends.

[0012] In one embodiment, the bristles include straight ends.

[0013] In one embodiment, the bristles include a crimp along the length of the bristles.

[0014] In one embodiment, the wire has a diameter of from 0.5 mm to 0.9 mm.

[0015] In one embodiment, the brush has an envelope shape selected from a cylindrical portion with a truncated cone portion, two truncated cone portions, a single truncated cone portion, a single cylindrical portion, and an oval, spirally cut cylindrical portion.

[0016] In one embodiment, about 6 mils includes from 5.7 mils to 6.3 mils.

[0017] In one embodiment, the brush has a circular cross-sectional shape.

[0018] In one embodiment, the brush has a cross-sectional shape that includes straight sides.

[0019] In one embodiment, the brush includes an attachment to the brush, such as a bending mechanism or comb-like element.

[0020] In one embodiment, the package further comprises a wiper, the wiper having an orifice of between 4.75 mm and 5.5 mm.

[0021] In one embodiment, a method for making a mascara brush includes twisting a wire, each wire wrap holding 11 to 13 bristles, the bristles having a solid circular or solid oval cross section with a diameter of about 6 mils, and cutting the bristles to achieve an average brush diameter of 7.4 mm to 8.2 mm.

[0022] In one embodiment, about 6 mils includes from 5.7 mils to 6.3 mils.

[0023] The mascara applicator includes round or oval bristles with a diameter of about 6 mils (about 0.006 inches or about 0.15 mm), a basic round or oval bristle cross-section, and about 240 bristles plus or minus 10% (215 to 265 bristles) corresponding to 11 to 13 bristles per coil, and an average brush diameter of 7.4 mm to 8.2 mm. This bristles has consistently been shown to perform very well as a mascara brush.

[0024] This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

[0025] The foregoing aspects and many of the attendant advantages of this invention will become more readily understood by reference to the following detailed description when taken in conjunction with the accompanying drawings, in which: [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a schematic diagram of a cosmetic package including a mascara brush according to one embodiment. [Figure 2] 1 is a photograph of a twisted wire brush according to one embodiment. [Figure 3A] FIG. 1 is a schematic diagram of one embodiment of a brush shape. [Figure 3B] FIG. 1 is a schematic diagram of one embodiment of a brush shape. [Figure 3C] FIG. 1 is a schematic diagram of one embodiment of a brush shape. [Figure 3D] FIG. 1 is a schematic diagram of one embodiment of a brush shape. [Figure 3E] FIG. 1 is a schematic diagram of one embodiment of a brush shape. [Figure 3F] FIG. 1 is a schematic diagram of one embodiment of a brush shape. [Figure 3G] FIG. 1 is a schematic diagram of one embodiment of a brush shape. [Figure 3H] FIG. 1 is a schematic diagram of one embodiment of a brush shape. [Figure 4A] FIG. 2 is a schematic diagram of one embodiment of a brush cross section. [Figure 4B] FIG. 2 is a schematic diagram of one embodiment of a brush cross section. [Figure 4C] FIG. 2 is a schematic diagram of one embodiment of a brush cross section. [Figure 4D] FIG. 2 is a schematic diagram of one embodiment of a brush cross section. [Figure 4E] FIG. 2 is a schematic diagram of one embodiment of a brush cross section. [Figure 4F] FIG. 2 is a schematic diagram of one embodiment of a brush cross section. [Figure 4G] FIG. 2 is a schematic diagram of one embodiment of a brush cross section. [Figure 4H] FIG. 2 is a schematic diagram of one embodiment of a brush cross section. [Figure 4I] FIG. 2 is a schematic diagram of one embodiment of a brush cross section. [Figure 5A] FIG. 2 is a schematic diagram of one embodiment of a brush bristles. [Figure 5B] FIG. 2 is a schematic diagram of one embodiment of a brush bristles. [Figure 5C] FIG. 2 is a schematic diagram of one embodiment of a brush bristles. [Figure 5D] FIG. 2 is a schematic diagram of one embodiment of a brush bristles. [Figure 6A] FIG. 2 is a schematic diagram of one embodiment of a brush cross-sectional shape. [Figure 6B] FIG. 2 is a schematic diagram of one embodiment of a brush cross-sectional shape. [Figure 6C] FIG. 2 is a schematic diagram of one embodiment of a brush cross-sectional shape. [Figure 6D] FIG. 2 is a schematic diagram of one embodiment of a brush cross-sectional shape. [Figure 6E] FIG. 2 is a schematic diagram of one embodiment of a brush cross-sectional shape. [Figure 6F] FIG. 2 is a schematic diagram of one embodiment of a brush cross-sectional shape. [Figure 6G] FIG. 2 is a schematic diagram of one embodiment of a brush cross-sectional shape. [Figure 6H] FIG. 2 is a schematic diagram of one embodiment of a brush cross-sectional shape. [Figure 6I] FIG. 2 is a schematic diagram of one embodiment of a brush cross-sectional shape. [Figure 6J] FIG. 2 is a schematic diagram of one embodiment of a brush cross-sectional shape. [Figure 6K] FIG. 2 is a schematic diagram of one embodiment of a brush cross-sectional shape. [Figure 7] FIG. 1 illustrates a technique for determining mascara volume and separation. [Figure 8A] 1 is a graph of volume test results for solid round bristles of various diameters. [Figure 8B] 1 is a graph of volume test results for hollow round bristles of various diameters. [Figure 8C] 1 is a graph of volume test results for solid bean bristles of various diameters. [Figure 8D] 1 is a graph of volume test results for solid long wavy brush bristles of various diameters. [Figure 8E] 1 is a graph of volume test results for solid short wavy bristles of various diameters. [Figure 8F] 1 is a graph of separation test results for solid round bristles of various diameters. [Figure 8G] 1 is a graph of separation test results for hollow round bristles of various diameters. [Figure 8H] 1 is a graph of separation test results for solid bean bristles of various diameters. [Figure 8I]1 is a graph of separation test results for solid long wavy bristles of various diameters. [Figure 8J] 1 is a graph of separation test results for solid short wavy bristles of various diameters. [Figure 9] FIG. 1 is a schematic diagram of a brush having a bending mechanism. [Figure 10A] FIG. 2 is a schematic diagram of a brush bristle end before grinding. [Figure 10B] FIG. 10 is a schematic diagram of the brush bristle end after grinding. [Figure 11] FIG. 1 is a schematic diagram of a brush including comb-like elements. DETAILED DESCRIPTION OF THE INVENTION

[0027] Bristle structure is important to the effectiveness of mascara application. Although there have been many attempts to invent new bristles and packaging systems, there is a lack of specification of brush characteristics (especially with specific types of bristles) due to the difficulty of determining performance using in vitro data.

[0028] In one embodiment, the objective of this disclosure is to leverage existing technology to provide the best ratio of volume to separation. The challenge with mascara is to maximize volume and maximize separation. The objective is more separation at a given volume level.

[0029] Using an approach that combines various brush factors (such as bristle shape, bristle size, brush size, number of bristles / separation elements, etc.) whose influence produces results, along with in vitro methods to find the best volume to separation ratio, the best combination of specifications for a mascara brush was developed.

[0030] Referring to FIG. 1, a cosmetic package 10 includes a container 6 intended to hold a cosmetic product and an applicator 1 for applying the cosmetic product, which is selectively secured to the container 6 for application of the cosmetic product and extracted from the container 6 for application of the cosmetic product to a surface to be handled.

[0031] In the exemplary embodiment shown, the cosmetic product is a mascara composition intended to be applied to the eyelashes and / or eyebrows of a user.

[0032] The applicator 1 comprises a gripping member 2 intended to be grasped and handled by a user in order to apply product to the applicator 1 and to apply the applied product to the eyelashes and / or eyebrows.

[0033] The gripping member 2 of the applicator 1 constitutes a cap for closing the container 6 .

[0034] The applicator 1 also includes a handle 3 extending along a longitudinal axis and having a first end 31 fixed to the gripping member 2 along the longitudinal axis, and a second end 32 at an end opposite the first end.

[0035] The applicator 1 finally comprises a brush 4 for applying the cosmetic product, which is fixed to the second end 32 of the handle 3 .

[0036] The container 6 is provided with a wiper 7 below the neck and inside the container 6 for removing excess product present on the handle 3 and the applicator member 4. The wiper 7 includes a lip, for example made of an elastomeric material, and defines a wiping orifice preferably having a circular cross section, the diameter of which corresponds substantially to the diameter of the handle 3. In an embodiment, the handle 3 has a diameter of 3 mm to 6 mm. In an embodiment, the wiper 7 has an orifice of 4.75 mm to 5.5 mm.

[0037] In one embodiment, brush 4 includes a twisted wire 41 (as shown in FIG. 2) and bristles 40 held by the twisted wire 41. Typically, twisted wire brushes are folded back into a U-shape and twisted to form turns that grip the bristles 40 in the process. In one embodiment, the twisted wire has between 10 and 30 turns, preferably between 17 and 22 turns. The turns are made clockwise or counterclockwise.

[0038] Referring to FIG. 2, one embodiment of the brush 4 includes 11 to 13 bristles per turn. The brush core is constructed from a twist of iron wire 41 having a circular cross-section and a diameter of 0.5 mm to 0.9 mm, preferably 0.6 mm to 0.8 mm. In one embodiment, the bristles 40 are made of nylon 6,10 having a solid circular cross-section with a diameter of about 6 mils (about 0.006 inches or about 0.15 mm). Each bristles 40 is held within its center by the twisted wire 41, and in one embodiment, all of the bristles define a single helical layer, with the bristles generally spaced apart from one another. That is, one bristles 40 forms an angle with adjacent bristles that is constant within approximately 20% all along the helical layer. For reference, a 28.5 mm long brush with 20 turns may have approximately 240 bristles. A brush that is approximately 25 mm long (10% shorter) may have the same level of bristle density / structure with just 18 turns and 215 bristles (10% less).

[0039] In one embodiment, the brush 4 is manufactured by implementing a conventional manufacturing process used in the industry for all types of brushes with twisted cores. To this end, in a first step, the core wire 41 is bent into a hairpin shape. Tufts of bristles 40 are placed between the bent wires 40. In the twisting action, the bristles are distributed at regular intervals between the twisted wires, so that after twisting, the brush has a uniform distribution of bristles.

[0040] In one embodiment, the brush 4 and bristles 40 are made by an injection molding process.

[0041] In an embodiment, the number of bristles 40 per turn is greater than 5, preferably 10-20 bristles per turn, more preferably 11 to 13 bristles per turn.

[0042] In one embodiment, the brush 4 includes between 18 and 20 turns. In one embodiment, the brush 4 includes between 215 and 265 bristles, more preferably between 230 and 250 bristles.

[0043] The bristles are defined by the number of tufts of fiber within the brush. For example, one tuft can create two separate elements, and when the brush is unwound, there may be about 215 to about 265 tufts. However, this doubles the number of bristles because one tuft is twisted between the wire and the two ends that protrude on either side of the wire.

[0044] After twisting is achieved, the brush is ground or trimmed to shape the longitudinal profile, cross-sectional profile, or both the longitudinal and cross-sectional profiles. In one embodiment, such as FIG. 3, the brush 4 has a cylindrical-conical shape, with the cylindrical portion forming a portion of the perimeter having the largest diameter. In this embodiment, the brush 4 has an average brush diameter of 7.4 mm to 8.2 mm. This diameter is a critical factor in the volume-to-separation ratio, as it determines the accessibility of the lashes to the mass deposited within the brush. Contrary to conventional wisdom, larger brushes correspond to smaller volumes, while smaller brushes deliver more instant / immediate volume.

[0045] In embodiments, the bristles 40 of the brush are made of polyamide 6, 10, polyamide 6 / 6, polyamide 6, 12, or polyamide 6, or polyamide 11, polyamide 10.10, or any other variation of PA, or polyester, or polytetrafluoroethylene. In embodiments, the bristles 40 are made of a natural or artificial material, for example, selected from PP, PA, PET, PS, PE, PVC, TPE, or silicone. In embodiments, the bristles 40 have a magnetic filler or a material for improving sliding, such as graphite, PTFE, or molybdenum disulfide. In embodiments, these raw materials may or may not be provided with agents that improve the sliding and wet properties of the material.

[0046] As shown in Figures 3A through 3H, the free ends of the bristles 40 define the envelope of the brush 4. In Figure 3A, this envelope is substantially in the form of a cylinder 300 of revolution about its longitudinal axis, beginning at the end of the portion of the brush 4 that supports the bristles 40 and is located on the handle side. A frustoconical portion 302 is then provided where the cylindrical portion 300 terminates and continues to the distal end of the brush 4. This frustoconical portion narrows in diameter from the cylindrical portion 300 toward the free end of the brush 4. In Figure 3A, the cylindrical portion 300 comprises the majority of the length of the brush 4, and the frustoconical portion 302 comprises a portion of the length of the brush 4.

[0047] In Figure 3A, the brush envelope is also substantially in the form of a cylinder 304 of revolution about its longitudinal axis, beginning at the end of the portion of brush 100 that supports the bristles located on the handle side. A frustoconical portion 306 is then provided where cylindrical portion 304 terminates and continues to the distal end of brush 100. This frustoconical portion narrows in diameter from cylindrical portion 304 toward the free end of brush 100. In Figure 3A, cylindrical portion 304 comprises most of the length of brush 100, and frustoconical portion 306 comprises part of the length of brush 100.

[0048] 3C, the brush envelope is substantially entirely a frustoconical portion 310 that begins at the end of the portion of the brush 102 that supports the bristles located on the handle side and continues to the distal end of the brush 102. This frustoconical portion narrows in diameter toward the free end of the brush 102.

[0049] 3D, the brush envelope is substantially entirely in the form of a cylinder 312 of revolution about its longitudinal axis, beginning at the end of the portion of the brush 104 that supports the bristles located on the handle side. The cylindrical portion 312 continues to the distal end of the brush 104.

[0050] In Figure 3E, the brush envelope is substantially entirely in the form of an oval 314 of revolution about the longitudinal axis beginning at the end of the portion of the brush 106 that supports the bristles located on the handle side. The oval portion 314 continues to the distal end of the brush 106.

[0051] In Figure 3F, the brush envelope includes a portion in the form of a cylinder 316 of revolution about its longitudinal axis, starting from the end of the portion of the brush 108 that supports the bristles located on the handle side. A frustoconical portion 318 is then provided where the cylindrical portion 316 terminates and continues to the distal end of the brush 108. This frustoconical portion 108 narrows in diameter from the cylindrical portion 316 toward the free end of the brush 108. In Figure 3F, the frustoconical portion 318 has a different longitudinal axis than the cylindrical portion, and as a result, the frustoconical portion 318 is at an angle to the longitudinal axis of the cylindrical portion 316.

[0052] In Figure 3G, the brush envelope is substantially entirely in the form of a cylinder 320 of revolution about its longitudinal axis, beginning at the end of the portion of the brush 110 that supports the bristles located on the handle side. The cylindrical portion 320 continues to the distal end of the brush 110. In the embodiment of Figure 3G, a spiral cut 322 is provided on the outer surface of the cylindrical portion 320.

[0053] In Figure 3H, the brush envelope includes a first frustoconical portion 324 that begins at the end of the portion of the brush 102 that supports the bristles located on the handle side. The frustoconical portion 324 narrows in diameter toward the free end of the brush 102. At the narrowest diameter of the first frustoconical portion 324, the frustoconical portion 326 is connected to a second frustoconical portion 326 that increases in diameter toward the free end of the brush 102.

[0054] While the brushes in Figures 3A through 3H depict embodiments of the brush envelope shape from the side, in Figures 4A through 4I, various cross-sectional envelope shapes are shown to illustrate the longitudinal cutouts. A brush may have two or more different cross-sectional shapes from Figures 4A through 4I.

[0055] The shape embodiments shown in Figures 3A through 3H, and those in Figures 4A through 4I, are formed, for example, by cutting or grinding the bristles when attached to a twisted core.

[0056] In FIG. 4A, the cross-sectional envelope shape of the brush 4 is circular.

[0057] In FIG. 4B, the cross-sectional envelope shape of brush 200 is square, cut or ground on four equal sides.

[0058] In FIG. 4C, the cross-sectional envelope shape of brush 202 is rectangular by cutting or grinding on four sides, one pair of sides being larger than the second pair.

[0059] In FIG. 4D, the cross-sectional envelope shape of brush 204 is hexagonal, having been cut or ground on six equal sides.

[0060] In FIG. 4E, the cross-sectional envelope shape of brush 206 is octagonal, cut or ground on eight equal sides.

[0061] In FIG. 4F, the cross-sectional envelope shape of brush 208 is oval.

[0062] In Figure 4G, the cross-sectional envelope shape of the brush 210 is generally circular with three longitudinal cutouts 216 made on the exterior. Each longitudinal cutout 216 is equally spaced around the circumference of the brush. Each longitudinal cutout 216 is made up of three sides.

[0063] In Figure 4H, the cross-sectional envelope shape of the brush 212 is generally circular with three longitudinal cutouts 218 made on the exterior. Each longitudinal cutout 218 is equally spaced around the circumference of the brush. Each longitudinal cutout 218 consists of a single flat surface.

[0064] In Figure 4I, the cross-sectional envelope shape of the brush 214 is generally circular with three longitudinal cutouts 220 made on the exterior. Each longitudinal cutout 220 is equally spaced around the circumference of the brush. Each longitudinal cutout 220 is comprised of a curved surface.

[0065] 5A through 5D show embodiments of bristles having various shapes for use in a brush.

[0066] Referring to FIG. 5A, one embodiment of bristles 500 for use in a brush includes bristles having blunt or straight ends 502.

[0067] Referring to FIG. 5B, one embodiment of bristles 504 used in the brush includes bristles having rounded ends 506 .

[0068] Referring to Figure 5C, one embodiment of the bristles 508 used in the brush includes kinks. The spacing between the kinks 510 can be closely spaced or relatively far apart. In Figure 5C, short wavy bristles are shown.

[0069] Referring to Figure 5D, one embodiment of bristles 512 is shown having kinks 514 that are spaced further apart than the kinks shown in Figure 5C. Figure 5D shows long wavy bristles.

[0070] 6A through 6K show embodiments of bristles having various cross-sectional shapes for use in a brush.

[0071] FIG. 6A is an embodiment of a bristle 400 having a solid oval cross-sectional shape.

[0072] FIG. 6B is an embodiment of bristles 402 having a cross-sectional shape that is a hollow triangle with three holes.

[0073] FIG. 6C is an embodiment of bristles 404 having a cross-sectional shape of a solid diamond.

[0074] FIG. 6D is an embodiment of bristles 406 having a solid circular cross-sectional shape.

[0075] FIG. 6E is an embodiment of bristles 408 having a hollow circular cross-sectional shape.

[0076] FIG. 6F is an embodiment of bristles 410 having a cross-sectional shape that is a hollow diamond with four holes.

[0077] FIG. 6G is an embodiment of bristles 412 having a solid four-lobe cross-sectional shape.

[0078] FIG. 6H is an embodiment of bristles 414 having a solid rectangular cross-sectional shape.

[0079] FIG. 6I is an embodiment of bristles 416 having a solid triangular cross-sectional shape.

[0080] FIG. 6J is an embodiment of solid round bristles 418 with split ends.

[0081] FIG. 6K is an embodiment of bristles 420 having a bean-like cross-sectional shape.

[0082] In one embodiment, the brush comprises bristles with a diameter of about 6 mils (about 0.006 inches / about 0.15 mm), a solid circular bristle cross section, 240 bristles plus or minus 10% (215 to 265 bristles) which corresponds to 11 to 13 bristles per turn, and an average brush diameter of 7.4 mm to 8.2 mm.

[0083] "Average brush diameter" has the following meanings for brushes of various shapes: According to Figures 3A through 3H, brush embodiments may be straight, frusto-conical, multiple frusto-conical, oval, etc., with or without a tapered tip.

[0084] The "average brush diameter" is defined as the midpoint of the diameter range; if the diameter is not continuously varying (i.e., straight, with or without tapering), then if the shape is continuously varying (i.e., frusto-conical / multiple frusto-conical / ovoid), then the "average brush diameter" is the diameter of the body.

[0085] Embodiments of the brush also have longitudinal cutouts that create non-circular brush cross-sections. The brush has longitudinal cutouts to create various brush cross-sections as shown in Figures 4A through 4I. When a flat cutout or multiple cutouts are present, the minimum width is considered to be the "average brush diameter."

[0086] As used herein, about 6 mils (about 0.006 inches, about 0.15 mm) includes 5.7 mils to 6.3 mils (0.0057 inches to 0.0063 inches, 0.1425 mm to 0.1575 mm).

[0087] As used herein, a "circular cross-section" may deviate slightly, such as within 90% of being perfectly circular, such as an oval that is very close to circular.

[0088] In one embodiment, the brush includes post-treatments such as cutouts (flat cutouts, spiral cutouts, offset circular cutouts, etc.).

[0089] In one embodiment, the bristle ends are rounded, such as by heating or grinding.

[0090] In embodiments, the bristles are curved, in which case the dimensions, such as diameter, are determined before bending.

[0091] In embodiments, the brush is wrapped in either a clockwise or counterclockwise direction. In embodiments, the direction is the same as the direction in which the cap is unscrewed from the bottle. For example, if the cap is unscrewed counterclockwise, the bristles are wrapped in the same counterclockwise direction.

[0092] In an embodiment, the metal wire 41 is 0.5 mm to 0.9 mm, preferably 0.6 mm to 0.8 mm.

[0093] In an embodiment, the stem 3 has a diameter of between 4 mm and 6 mm.

[0094] 9 is a schematic diagram of a brush 900 having a bending feature 902. The bending feature is a reduced diameter section of a shank 904. The shank 904 may be made of a flexible material such that the shank bends at the bending feature.

[0095] FIG. 10A is a schematic diagram of a bristle end 1000 before grinding.

[0096] FIG. 10B is a schematic diagram of the bristle end 1002 after grinding.

[0097] FIG. 11 is a schematic diagram of a brush 1100 that includes comb-like elements 1102 for a combing-like effect. [Example]

[0098] Determining Bristle Type Based on Volume-to-Separation Ratio Various bristles of various diameters are tested to determine the volume to separation ratio, including solid, hollow, pea (bean), long wave, and short wave bristles with diameters of 4 mil, 5 mil, and 6 mil.

[0099] The test protocol involves applying mascara onto the false eyelashes using a mechanical arm configured to apply it in a predetermined number of strokes. The false eyelashes are weighed before and after application of the mascara. The false eyelashes are analyzed by image analysis to count the number of pixels.

[0100] Referring to Figure 7, images were created for each bristle / brush size / bristle count variation. The images were analyzed for deposition, volume, and separation for each bristle / brush size / bristle count variation. By analyzing the fake eyelashes, it is possible to quantify the volume / separation differences for each test cell. Then, by utilizing a DOE (Design of Experiments) program, it is possible to obtain a graphical heat map showing which variations produce which volume levels and which separation levels make up that volume. It is then possible to find the brush specifications that produce the highest ratio.

[0101] 8A through 8J are heat maps determining the volume to separation ratio for each bristle type. Bristle diameter is on the y-axis and wiper orifice size is on the x-axis. Bristle diameters ranged from 4 mils to 6 mils, and wiper diameters from 4 to 5.3 were measured.

[0102] Each of Figures 8A through 8E relates to the volume of each bristle type. A dashed oval representing maximum volume is shown in each figure. Volume values ​​are obtained from the legend to the right of the figure. For example, the highest volume value from Figure 8A for solid bristles is 89.9, which corresponds to 6 mil bristles.

[0103] Figures 8F through 8J each relate to the separation of each bristle type. The dashed ovals represent the corresponding separation values ​​for the bristle size determined to have the largest volume from Figures 8A through 8E. The separation values ​​are taken from the legends to the right of the figures.

[0104] For example, from Figure 8A, the solid bristles with the greatest volume were determined to be at 6 mils. Then, the separation value from Figure 8F for the 6 mil solid bristles is 21.2.

[0105] Therefore, the volume to separation ratio for a 6 mil solid bristles would be 89.9 / 21.2, which is 4.24.

[0106] From Figures 8A through 8E, it can be determined that the brush with 6 mil solid bristles has the highest level of volume for separation.

[0107] While illustrative embodiments have been shown and described, it will be appreciated that various changes can be made therein without departing from the spirit and scope of the invention.

[0108] The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: [Explanation of symbols]

[0109] 1 Applicator, applicator member 2. Gripping member 3, 904 Handle 4, 100, 102, 104, 106, 108, 110, 200, 202, 204, 206, 208, 210, 212, 214, 900, 1100 Brush 6 containers 7 wiper 10. Cosmetic packaging 31 (of applicator) first end 32 (of the applicator) second end 40, 400, 402, 404, 406, 408, 410, 412, 414, 416, 418, 420, 500, 504, 508, 512 Brush bristles 41 Twisted wire, iron wire, metal wire 216, 218, 220 Longitudinal cutouts 300, 304, 312, 316, 320 Cylinders, cylindrical parts 302, 306, 310, 318 Conical section 314 Oval, egg-shaped part 322 Spiral cut 324 truncated cone, first truncated cone 326 truncated cone, second truncated cone 502 (of the bristles 500) straight end 506 (of the bristles 504) rounded ends 510 (Brush hair 508) Frizz 514 (Brush hair 512) Frizz 902 Bending mechanism 1000 Brush bristle end (before grinding) 1002 Brush bristle end (after grinding) 1102 Comb-like elements

Claims

1. bristles having a solid round or solid oval cross section with a diameter of about 6 mils; a twisted wire core holding the bristles, the twisted wire core including 11 to 13 bristles per turn; 1. A mascara brush comprising: The mascara brush has an average brush diameter of 7.4 mm to 8.2 mm. Mascara brush.

2. 10. The mascara brush of claim 1, wherein the bristles include rounded ends.

3. 10. The mascara brush of claim 1, wherein the bristles include straight ends.

4. 4. A mascara brush according to any one of claims 1 to 3, wherein the wire has a diameter of from 0.5 mm to 0.9 mm.

5. 5. The mascara brush according to claim 1, wherein the mascara brush has an envelope shape selected from a cylindrical portion with a truncated cone portion, two truncated cone portions, a single truncated cone portion, a single cylindrical portion, and an oval, spirally cut cylindrical portion.

6. 6. The mascara brush of claim 1, wherein the approximately 6 mils comprises from 5.7 mils to 6.3 mils.

7. 7. The mascara brush according to claim 1, wherein the mascara brush has a circular cross-sectional shape.

8. 7. The mascara brush according to claim 1, wherein the mascara brush has a cross-sectional shape that includes straight sides.

9. The mascara brush according to claim 1; a handle connected to one end of the mascara brush; a cap connected to the second end of the stem; a container containing mascara; Including the package.

10. 10. The package of claim 9, wherein the bristles include a crimp along the length of the bristles.

11. 11. The package of claim 9 or 10, comprising an attachment to the mascara brush, such as a bending mechanism or a comb-like element.

12. 12. The package of claim 9, further comprising a wiper, the wiper having an orifice of 4.75 mm to 5.5 mm.

13. 1. A method for making a mascara brush, comprising: twisting the wire, each wire spool carrying 11 to 13 bristles, the bristles having a solid circular or solid oval cross section having a diameter of about 6 mils; cutting the bristles to achieve an average brush diameter of 7.4 mm to 8.2 mm; A method comprising:

Images