Applicator with bristles of particle-filled plastic

Patent metadata

Field	Value
Publication number	US-10499725-B2
Application number	US-201515500667-A
Country	US
Kind code	B2
Filing date	Jul 31, 2015
Priority date	Jul 31, 2014
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

A mascara brush with a core comprising at least two sections of wire twisted together along a wire core longitudinal axis and a set of bristles comprising bristles of plastic formed by filaments, which are respectively clamped between the two sections of wire and are formed at their free ends with a wedge-shaped bristle tip or without a wedge-shaped bristle tip. The mascara brush provides an increased storage capacity for the mascara composition to be applied with improved delivery of stored mascara composition to the lashes. This is achieved by the bristles being formed from a plastic material extruded into a fibre, to which outwardly protruding particles are added and/or which is provided with punctiform depressions (indentations), which roughen the bristle surface, wherein the bristles that have a wedge-shaped bristle tip at their free ends comprise at least one cut surface that forms a wedge and the surface roughness of which lies between 0.2 μm and 6.3 μm, in particular between 2.9 μm and 6.3 μm.

First claim

The invention claimed is:

1. A mascara brush, comprising:
an inner core of at least two wire portions twisted together along a longitudinal wire core axis (LD); and
a bristle covering of bristles of plastic formed by filaments that are each held clamped between the two wire portions and that are configured at their free ends with a wedge-shaped or without a wedge-shaped bristle tip, wherein the bristles are formed from a plastic material that is extruded to form a fiber and to which outwardly protruding particles are added, and/or that is equipped with point-shaped depressions (indentations) that roughen the bristle surface, wherein the bristles having at their free ends a wedge-shaped bristle tip comprise at least one cut face which forms a wedge and whose surface roughness (Rz) is between 0.2 μm and 6.3 μm.

2. The mascara brush according to claim 1 , wherein the surface roughness (Rz) is produced by grinding the bristle ends with a grinding disk.

3. The mascara brush according to claim 1 , wherein the surface roughness (Rz) of the respective cut face is greater than a surface roughness of an undisturbed bristle shaft surface comprising the outwardly protruding particles and/or point-shaped depressions (indentations).

4. The mascara brush according to claim 1 , wherein each of the bristles has, for a predominant part, a wedge-shaped tip with at least one cut face.

5. The mascara brush according to claim 1 , wherein some of the bristles have a wedge-shaped tip, which is formed by an oblique cut, with a cut face.

6. The mascara brush according to claim 1 , wherein some of the bristles have a wedge-shaped tip formed by a double oblique cut, which has two cut faces running towards each other which, or the imaginary extensions of which, intersect at or in a area of a free end of a respective bristle.

7. The mascara brush according to claim 1 , wherein the at least one cut face is orientated transversely to the longitudinal wire core axis (LD).

8. The mascara brush according to claim 1 , wherein the cut faces of the bristles with a cut face are, in part, orientated in a direction towards a brush tip and, in part, towards a brush end opposite the brush tip.

9. The mascara brush according to claim 1 , wherein the bristle covering has a plurality of areas, sectors or zones, which are orientated to extend, in a circumferential direction of the bristle covering, transversely to the longitudinal wire core axis (LD), or, in the circumferential direction of the bristle covering, spiral-shaped to the longitudinal wire core axis (LD), or, in a longitudinal direction of the bristle covering, alongside of the longitudinal wire core axis (LD), and which respectively comprise at least one bristle row consisting of a plurality of adjacent bristles that each have an identically configured bristle tip, or are formed by such a bristle row, and which, in the circumferential direction and/or in the longitudinal direction of the bristle covering, are respectively disposed adjacent to one area or sector or zone which comprises a plurality of bristles each having a differently configured bristle tip.

10. The mascara brush according to any claim 1 , wherein the bristle covering has a plurality of areas, sectors or zones, which are orientated to extend, in a circumferential direction of the bristle covering, transversely to the longitudinal wire core axis (LD), or, in the circumferential direction of the bristle covering, spiral-shaped to the longitudinal wire core axis (LD), or, in a longitudinal direction of the bristle covering, alongside of the longitudinal wire core axis (LD), and which respectively comprise at least one bristle row which consists of a plurality of adjacent bristles and whose adjacent bristles each have a differently configured bristle tip.

11. The mascara brush according to claim 9 , wherein the a plurality of areas, sectors or zones, in the circumferential direction, transversely or longitudinally to the longitudinal wire core axis (LD), sweep over the circumference or a partial area of the circumference of the bristle covering once.

12. The mascara brush according to claim 1 , wherein the bristle covering consists of bristles or filaments with a wedge-shaped pointed portion and of further bristles or filaments without a wedge-shaped pointed portion, wherein the bristles or filaments with a wedge-shaped pointed portion form one or more sector(s) of the bristle covering and the further bristles or filaments form one or more further sector(s), the sector(s) and the further sector(s) following each other alternately in a circumferential direction.

13. The mascara brush according to claim 12 , wherein between 1 and 8 sectors and between 1 and 8 further sectors are provided.

14. The mascara brush according to claim 12 , wherein the bristles or filaments with the wedge-shaped pointed portion are disposed in such a way, in the bristle covering that otherwise consists of further bristles or filaments, that the bristles or filaments with the wedge-shaped pointed portion form a track extending in a spiral shape on a circumferential enveloping surface of the bristle covering.

15. The mascara brush according to claim 12 , wherein the further bristles or filaments are made of the same material as the bristles or filaments with a wedge-shaped pointed portion.

16. The mascara brush according to claim 14 , wherein chisel faces of the bristles or filaments with a wedge-shaped pointed portion, neglecting their wedge angle, are orientated perpendicularly to a course of an imaginary longitudinal axis of the spiral-shaped track.

17. The mascara brush according to claim 1 , wherein, for an angle (α) by which the cut face(s) formed by an oblique cut or a double oblique cut is/are inclined relative to a longitudinal bristle axis (L), α≤55°.

18. The mascara brush according to claim 1 , wherein the bristles or filaments are tube-shaped and internally hollow, as well as continuously slit in a direction along their longitudinal axis.

19. The mascara brush according to claim 1 , wherein an outer diameter of the bristles with a circular configuration is ≥115 μm and ≤320 μm.

20. The mascara brush according to claim 1 , wherein an outer enveloping circle of bristles configured to be non-circular has an enveloping circle diameter which is ≥100 μm and ≤340 μm.

21. The mascara brush according to claim 1 , wherein at least a part of the bristles is produced by co-extrusion from a first plastic material and a second plastic material different from the first plastic material, wherein the two plastic materials differ with regard to a modulus of elasticity and/or a Shore D hardness, and wherein the first plastic material has a Shore D hardness ≤80 and/or the second plastic material has a modulus of elasticity of at least 1300 N/mm 2 , and
after a grinding process of the areas respectively consisting of one of the first and second plastic materials, namely the bristle core and the bristle jacket, with one and the same grinding disk, which is carried out for producing the respective cut face, different roughnesses are produced in an area of the bristle core and in an area of the bristle jacket that respectively have a surface roughness (Rz) between 0.2 μm and 6.3 μm.

Assignees

• Geka Gmbh

Inventors

• Kamm Wolfgang

Classifications

• A46B2200/1053

  Cosmetics applicator specifically for mascara · CPC title

• A46B9/021 Primary

  arranged like in cosmetics brushes, e.g. mascara, nail polish, eye shadow · CPC title

• A46D1/0238

  Bristles with non-round cross-section · CPC title

• A46D1/0276

  Bristles having pointed ends · CPC title

• A46D1/023

  Bristles with at least a core and at least a partial sheath · CPC title