MASCARA APPLICATOR
A mascara brush includes from bristles, wherein the bristles have a solid round or oval cross section with a diameter of about 6 mil, a twisted wire core holding the bristles, the twisted wire core includes 11 to 13 bristles per turn (equivalent to 210˜270 bristles per standard size of 27 mm˜28 mm brush); and the brush has an average brush diameter between 7.4 mm to 8.2 mm.
In one embodiment, a mascara brush comprises bristles, wherein the bristles have a solid round or solid oval cross section with a diameter of about 6 mil; a twisted wire core holding the bristles, the twisted wire core includes from 11 to 13 bristles per turn; and the brush has an average brush diameter between 7.4 mm to 8.2 mm.
In one embodiment, the bristles include rounded ends which is utilizing post-processing techniques such as grinding or heating.
In one embodiment, the bristles include a straight end.
In one embodiment, the wire has a diameter of 0.5 mm to 0.9 mm.
In one embodiment, the brush has an envelope shape selected from a cylindrical portion with a frustoconical portion, two frustoconical portions, a single frustoconical portion, a single cylindrical portion, and ovoid, a cylindrical portion with helical cuts.
In one embodiment, about 6 mil includes from 5.7 to 6.3.
In one embodiment, the brush has a cross-sectional shape of a circle.
In one embodiment, the brush has a cross-sectional shape including straight sides.
In one embodiment, a package comprises the mascara brush of claim 1; a stem connected to one end of the mascara brush; a cap connected to a second end of the stem; and a container including mascara.
In one embodiment, the bristles include rounded ends.
In one embodiment, the bristles include straight ends.
In one embodiment, the bristles include crimps along the length of the bristle.
In one embodiment, the wire has a diameter of 0.5 mm to 0.9 mm.
In one embodiment, the brush has an envelope shape selected from a cylindrical portion with a frustoconical portion, two frustoconical portions, a single frustoconical portion, a single cylindrical portion, and ovoid, a cylindrical portion with helical cuts.
In one embodiment, about 6 mil includes from 5.7 mil to 6.3 mil.
In one embodiment, the brush has a cross-sectional shape of a circle.
In one embodiment, the brush has a cross-sectional shape including straight sides.
In one embodiment, the brush includes attachments to the brush, such as a flexing mechanism or comb-like component.
In one embodiment, the package further comprises a wiper, wherein the wiper has an orifice from between 4.75 mm and 5.5 mm.
In one embodiment, a method for making a mascara brush comprises twisting a wire, wherein each wire turn holds from 11 to 13 bristles, wherein the bristles have a solid round or solid oval cross section with a diameter of about 6 mil; cutting the bristles to achieve an average brush diameter between 7.4 mm to 8.2 mm.
In one embodiment, about 6 mil includes from 5.7 mil to 6.3 mil.
A mascara applicator includes about 6 mil (about 0.006 inches or about 0.15 mm) diameter round or oval bristles; a bristle cross section of a basic circle or oval; about 240 bristles plus/minus 10% (215 to 265 bristles), which is the equivalent to 11 to 13 bristles per turn, and an average brush diameter between 7.4 mm to 8.2 mm. This bristle has consistently been proved to be extremely well performing for mascara brushes
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.
The foregoing aspects and many of the attendant advantages of this invention will become more readily appreciated as the same become better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:
Bristle configuration is important to the efficacy of mascara application. While there are many attempts to invent new bristles and packaging systems, there are no specifications of brush characteristics (especially using a specific type of bristle) because it is difficult to determine performance using in vitro data.
In one embodiment, an objective of this disclosure is to provide the best ratio of volume to separation utilizing existing technology. A challenge of mascara is maximizing volume and maximizing separation. An objective is higher separation at a given level of volume.
Using an approach of combining various brush factors that impact make up result—such as bristle shape, bristle size, brush size, number of bristles/separating elements, along with in-vitro methodology for finding the highest volume to separation ratio, combination of superior specification for mascara brush was developed.
Referring to
In the exemplary embodiments illustrated, the cosmetic product is a mascara composition intended to be applied to the eyelashes and/or eyebrows of a user's eyes.
The applicator 1 comprises a gripping member 2 intended to be grasped and handled by the user in order to load the applicator 1 with product and apply the loaded product to the eyelashes and/or eyebrows.
The gripping member 2 of the applicator 1 constitutes a cap for closing the container 6.
The applicator 1 also comprises a stem 3 extending along a longitudinal axis and having, along this longitudinal axis, a first end 31 secured to the gripping member 2 and a second end 32 at the opposite end from the first end 31.
The applicator 1 finally comprises a brush 4 for applying the cosmetic product that is secured to the second end 32 of the stem 3.
The container 6 is provided with a wiper 7 below the neck and in the interior of the container 6. The wiper 7 is for removing the excess product present on the stem 3 and on the applicator member 4. This wiper 7 comprises, for example, a lip made of an elastomer material, defining a wiping orifice which preferably has a circular cross section, the diameter of which corresponds substantially to that of the stem 3. In embodiments, the stem 3 has a diameter from 3 mm-6 mm. In embodiments, the wiper 7 has an orifice from between 4.75 mm and 5.5 mm
In one embodiment, the brush 4 comprises a twisted wire 41 (as seen in
Referring to
In one embodiment, the brush 4 is manufactured by implementing a conventional manufacturing process used industrially for all types of brush having a twisted core. To this end, in a first stage, the core wire 41 is folded into a hairpin. Tufts of bristles 40 are placed between the folded wire 40. In a twisting operation, the bristles are distributed regularly between the twisted wires, so that after twisting the brush has a uniform distribution of bristles.
In one embodiment, the brush 4 and bristles 40 are made by a process of injection molding.
In embodiments, the number of bristles 40 per turn is greater than 5, preferably between 10 and 20 bristles per turn, more preferably from 11 to 13 bristles per turn.
In one embodiment, the brush 4 comprises 18-20 turns. In one embodiment, the brush 4 comprises from 215 to 265 bristles, more preferably from 230 to 250 bristles.
Bristles are defined by counting the number of strands of fiber in the brush. For example, 1 strand can create two separating elements, when the brush is decoiled, there might be 215˜265 strands but this can translate to double the number of “bristles,” because one strand is twisted between the wire and two ends protrude on each side of the wire.
After twisting has been effected, the brush is ground or trimmed to shape the longitudinal profile or the cross-sectional profile or both the longitudinal profile and the cross-sectional profile. In one embodiment, such as
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 synthetic material, for example chosen from PP, PA, PET, PS, PE, PVC, TPEs, or silicone. In embodiments, the bristles 40 have a magnetic filler or one for improving sliding, for example graphite, PTFE or molybdenum disulfide. In embodiments, these raw materials may or may not be provided with agents improving the sliding and wetting properties of the material.
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In one embodiment, a brush includes about 6 mil (0.006 inches/about 0.15 mm) diameter bristles, a bristle cross section of a solid circle, 240 bristles plus/minus 10% (215 to 265 bristles), equivalent to 11 to 13 bristles per turn, and an average brush diameter between 7.4 mm to 8.2 mm.
The “average brush diameter” has the following meanings for different-shaped brushes. According to
The “average brush diameter” is defined as a midpoint of the diameter range if the shape is continuously changing (i.e. frustoconical/multiple frustoconical/ovoid) if the diameter is not continuously changing (i.e. straight with or without taper), then the “average brush diameter” is the diameter of the main body.
Embodiments of the brush also have longitudinal cuts that produce a cross-section of the brush other than circular. Brushes have longitudinal cuts to result in various brush cross section as illustrated in
As used herein, about 6 mil (about 0.006 inches, about 0.15 mm) includes from 5.7 mil to 6.3 mil (0.0057 to 0.0063 inches, 0.1425 to 0.1575 mm).
As used herein a “round cross section” can also be slightly offset to be an oval very close to a circle, such as within 90% of being a perfect circle).
In embodiments, the brush includes post-treatments such as cuts (flat cut, helical cut, offset rounded cut, etc.)
In embodiments, the bristle edges are rounded, such as through heating, grinding, and the like.
In embodiments, the bristles are curved. In such a case, the dimensions, such as diameter, are determined before curving.
In embodiments, the brush is coiled in either clockwise or counterclockwise direction. In embodiments, the direction is the same as the direction of un-screwing the cap from the bottle. For example, when the cap unscrews counterclockwise, then, the bristles are wound in the same counterclockwise direction.
In embodiments, the metal wire 41 is from 0.5 mm to 0.9 mm, preferably, from 0.6 mm to 0.8 mm.
In embodiments, the stem 3 has a diameter from 4 mm to 6 mm.
Different bristles in various diameters are tested to determine a ratio of volume versus separation. The different bristles include solid, hollow, haricot (bean), long-wave, and short-wave having diameters of 4 mil, 5 mil, and 6 mil.
A testing protocol includes applying mascara onto fake lashes using a mechanical arm configured to apply a predetermined number of strokes. The fake lashes are weighed before and after application of mascara. The fake lashes are analyzed via image analysis to count the number of pixels.
Referring to
Each of the FIGS. from 8A to 8E relates to the volume for each bristle type. A dashed oval representing the highest volume is shown in each figure. The value for volume is obtained from the legend to the right of the figure. For example, the highest volume value from
Each of the FIGS. from 8F to 8J relates to the separation for each bristle type. A dashed oval represents the corresponding separation value for the size of the bristle determined to have the highest volume from
For example, from
Therefore, the volume to separation ratio of 6 mil solid bristles becomes 89.9/21.2, which is 4.24.
From the
While illustrative embodiments have been illustrated and described, it will be appreciated that various changes can be made therein without departing from the spirit and scope of the invention.
Claims
1. A mascara brush, comprising:
- bristles, wherein the bristles have a solid round or solid oval cross section with a diameter of about 6 mil;
- a twisted wire core holding the bristles, the twisted wire core includes from 11 to 13 bristles per turn; and
- the brush has an average brush diameter between 7.4 mm to 8.2 mm.
2. The mascara brush of claim 1, wherein the bristles include rounded ends which is utilizing post-processing techniques such as grinding or heating.
3. The mascara brush of claim 1, wherein the bristles include a straight end.
4. The mascara brush of claim 1, wherein the wire has a diameter of 0.5 mm to 0.9 mm.
5. The mascara brush of claim 1, wherein the brush has an envelope shape selected from a cylindrical portion with a frustoconical portion, two frustoconical portions, a single frustoconical portion, a single cylindrical portion, and ovoid, a cylindrical portion with helical cuts.
6. The mascara brush of claim 1, wherein about 6 mil includes from 5.7 to 6.3.
4. The mascara brush of claim 1, wherein the brush has a cross-sectional shape of a circle.
5. The mascara brush of claim 1, wherein the brush has a cross-sectional shape including straight sides.
6. A package, comprising:
- the mascara brush of claim 1;
- a stem connected to one end of the mascara brush;
- a cap connected to a second end of the stem; and
- a container including mascara.
7. The package of claim 9, wherein the bristles include rounded ends.
8. The package of claim 9, wherein the bristles include straight ends.
9. The package of claim 9, wherein the bristles include crimps along the length of the bristle.
10. The package of claim 9, wherein the wire has a diameter of 0.5 mm to 0.9 mm.
11. The package of claim 9, wherein the brush has an envelope shape selected from a cylindrical portion with a frustoconical portion, two frustoconical portions, a single frustoconical portion, a single cylindrical portion, and ovoid, a cylindrical portion with helical cuts.
12. The package of claim 9, wherein about 6 mil includes from 5.7 mil to 6.3 mil.
13. The package of claim 9, wherein brush has a cross-sectional shape of a circle.
14. The package of claim 9, wherein the brush has a cross-sectional shape including straight sides.
18. The package of claim 9, includes attachments to the brush such as a flexing mechanism or comb-like component.
19. The package of claim 9, further comprising a wiper, wherein the wiper has an orifice from between 4.75 mm and 5.5 mm.
20. A method for making a mascara brush, comprising:
- twisting a wire, wherein each wire turn holds from 11 to 13 bristles, wherein the bristles have a solid round or solid oval cross section with a diameter of about 6 mil;
- cutting the bristles to achieve an average brush diameter between 7.4 mm to 8.2 mm.
21. The method of claim 20, wherein about 6 mil includes from 5.7 mil to 6.3 mil.
Type: Application
Filed: Feb 2, 2023
Publication Date: Aug 8, 2024
Inventor: Kyoo Jin PARK (Leonia, NJ)
Application Number: 18/105,196