EP3313230A1 - Procédé de fabrication d'une brosse à mascara - Google Patents

Procédé de fabrication d'une brosse à mascara

Info

Publication number
EP3313230A1
EP3313230A1 EP16733405.1A EP16733405A EP3313230A1 EP 3313230 A1 EP3313230 A1 EP 3313230A1 EP 16733405 A EP16733405 A EP 16733405A EP 3313230 A1 EP3313230 A1 EP 3313230A1
Authority
EP
European Patent Office
Prior art keywords
grooves
groove
core
brush
helical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16733405.1A
Other languages
German (de)
English (en)
Inventor
Eric Caulier
Davide Manici
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOreal SA
Original Assignee
LOreal SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LOreal SA filed Critical LOreal SA
Publication of EP3313230A1 publication Critical patent/EP3313230A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/021—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups arranged like in cosmetics brushes, e.g. mascara, nail polish, eye shadow
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/026—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups where the surface of the brush body or carrier is not in one plane, e.g. not flat
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D40/00—Casings or accessories specially adapted for storing or handling solid or pasty toiletry or cosmetic substances, e.g. shaving soaps or lipsticks
    • A45D40/26—Appliances specially adapted for applying pasty paint, e.g. using roller, using a ball
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/04—Preparing bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1046—Brush used for applying cosmetics
    • A46B2200/1053—Cosmetics applicator specifically for mascara

Definitions

  • the present invention relates to brushes for applying a cosmetic product to the eyelashes or eyebrows, in particular a makeup or care product, for example mascara, and to corresponding packaging and application devices.
  • the brush comprises a core formed by two branches of a metal wire that are twisted together and grip bristles.
  • the brush Since the bristles used are generally the same length, once the branches are twisted, the brush has an envelope surface in the form of a cylinder of revolution. Such a form has limited effectiveness in terms of loading the eyelashes and separation. Efforts have thus been made to give the envelope surface more complex shapes so as to form on the brush, after wiping, zones that are more heavily laden with product, making it possible to properly load the eyelashes, and zones that are less heavily laden, these being usable to separate the eyelashes. Finding the shape that results in the optimum makeup result requires numerous tests, since many factors come into play.
  • the patent application FR 2 605 505 discloses a brush in which the envelope surface of the regions situated between two crests is a planar surface or a surface with a concave profile. An envelope surface is thus obtained which, in cross section, has various shapes such as a triangle, a square or a hexagon, with straight or concave sides.
  • US 6 279 583 provides a similar teaching.
  • helical grooves are cut in a blank.
  • the core is then further twisted so as to intersperse the bristles so that the final brush exhibits a substantially uniform envelope surface
  • US 5 551 456 discloses a brush obtained by twisting a blank that has a flattened cross section.
  • the invention aims to meet this need and, according to one of its aspects, relates to a method for manufacturing a brush for applying a product to the eyelashes and/or eyebrows, comprising a core having two branches which are twisted together and bristles clamped between the branches, this method comprising the steps of:
  • a brush is obtained that comprises product storage zones in the grooves above, for providing a sufficient charge of product, and zones that are loaded with less product, in the area outside said grooves, and that can be used for separating the eyelashes and/or eyebrows.
  • the helical trajectory of the helical groove ensures gradual loading of the eyelashes.
  • the final brush i.e. as manufactured and introduced in a container containing the product to be applied, comprises the at least one helical groove and the at least one second groove that intersects the first one.
  • a "groove” is to be understood as meaning a hollowed-out relief when the brush is observed in cross section.
  • helical is to be understood as meaning a groove which runs around the longitudinal axis of the core as it proceeds along the latter. It can be a helix with a fixed or variable pitch and/or with a constant or variable radius.
  • the pitch is preferably fixed if one considers the helix defined by the bottom of the groove.
  • the radius of the helix is likewise preferably fixed if one considers the same helix.
  • the bottom of the groove can thus be situated at a constant distance from the core, all the way along the groove.
  • the depth of the groove, with respect to the envelope surface outside the groove, can also be variable.
  • the helical groove can be obtained by machining the blank with a relative helical displacement between the tool and the brush.
  • the groove formed at step a) can thus be helical or rectilinear, in which case the groove formed at step b) is helical.
  • the helical groove can also be obtained by machining a longitudinal groove, then twisting the blank about its longitudinal axis in order to give this groove a helical trajectory.
  • the groove formed at step a) is helical.
  • the method according to the invention can comprise the production of several helical grooves, in particular an uneven number of said grooves, preferably between 2 and 10. Said helical grooves can be distributed at equal angles about the longitudinal axis of the core.
  • the or at least one of said first grooves can have, in cross section, a V-shaped profile open towards the outside, with flanks, for example convex flanks, arranged opposite each other.
  • the or each first groove when helical, can extend at least 180° about the longitudinal axis of the core, in particular between a half turn and four turns about the longitudinal axis of the core, preferably by 360°.
  • the or each first groove can extend along at least half of the length of the part of the core carrying the bristles, preferably along 9/10 or more of this length.
  • the or each first groove can extend as far as the proximal end of the portion carrying the bristles but can remain set back from the distal end of said portion.
  • the method according to the invention comprises the production of one or more second grooves, in particular an even number of second grooves, preferably between 2 and 10.
  • the second grooves can be distributed at equal angles about the longitudinal axis of the core.
  • the or at least one of the second grooves can have, in cross section, a V-shaped profile open towards the outside, in particular with flat opposite flanks.
  • the one or more second grooves can have rectilinear axes or, alternatively, non- rectilinear axes.
  • the one or more second grooves can thus be helical and in particular can intersect the one or more first grooves with an angle of between 60° and 120°, preferably close to or equal to 90°.
  • All of the second grooves can be identical, except for a rotation about the longitudinal axis of the core.
  • the brush comprises second grooves which differ from one another, for example with one being helical and the other rectilinear.
  • the number of second grooves is preferably less than or equal to the number of first grooves, preferably less than said number.
  • the second grooves when helical, can have the same helix angle as the first grooves, apart from the sign.
  • the pitch can be the same or different, likewise the radius.
  • the invention also relates to a brush for applying a product to the eyelashes and/or eyebrows, in particular obtained by the method according to the invention as defined above, comprising a core having two branches which are twisted together and bristles held by the core, defining an envelope surface having at least one first helical groove and a second groove, which is helical or non-helical, in particular rectilinear, intersecting the first one.
  • the brush can comprise several first grooves and at least one second groove or at least one first groove and several second grooves, preferably several first grooves and several second grooves, the grooves defining a grid pattern on the envelope surface on account of their intersections.
  • the brush can have any one of the features set forth above, irrespective of the way in which it is manufactured.
  • the grooves intersect substantially at 90°.
  • the invention likewise relates to a packaging and application device comprising:
  • Such a brush comprises the at least one helical groove and the at least one second groove intersecting the first.
  • the container can be provided with a wiping member for removing the excess product present on the brush.
  • FIG. 1 shows an example of a packaging and application device according to the invention, in schematic longitudinal section,
  • FIG. 2 is a side view of an example of a brush according to the invention
  • FIGS. 3 and 4 show a brush blank used in the manufacture of the brush
  • FIG. 5 is a perspective view of the blank, after a first treatment step
  • FIG. 6 is a front view along VI in Figure 5
  • Figure 7 shows a perspective view of the treated blank from Figures 5 and 6, after the core has been twisted
  • FIG. 9 is a front view along IX in Figure 8,
  • FIG. 12 is a front view along XII in Figure 11.
  • the packaging and application device 1 shown in Figure 1 has a container 2 containing a product P to be applied to the eyelashes or eyebrows and an applicator 3 which, in the example in question, can be fixed removably to the container 2.
  • the product P comprises for example one or more pigments, in particular an iron oxide. It is preferably a mascara.
  • the applicator 3 has a stem 5 of longitudinal axis Y, which is provided at a distal end 5 a with a brush 10 according to the invention, and is provided at the other end with a gripping member 11 , which likewise forms a cap for closing the container 2 in a sealed manner.
  • the latter has a body 13 which is provided at the top with a threaded neck 14 onto which the gripping member 11 can be screwed in order to close the container 2.
  • the applicator can be fixed to the container in some other way.
  • the neck 14 is able to receive a wiping member 20 which, for example, is attached thereto.
  • This wiping member 20 has a lip 26 defining a wiping orifice with a diameter adapted to that of the stem 5.
  • the diameter of the stem 5 is, for example, between 3 and 8 mm.
  • the brush 10 can be fixed, in a conventional manner, in a seat provided at the distal end 5a of the stem 5, which is advantageously made of a thermoplastic material.
  • the brush 10 has a twisted metal core 40 formed by two branches which are twisted together and which between them grip bristles 41. It can be a stainless steel wire.
  • the core 40 is fixed at one end in the corresponding seat of the stem 5 by a proximal portion 40a that does not have bristles, it being possible for said portion to have a length of the order of 8 mm, for example.
  • the free ends of the bristles 41 define the envelope surface S of the brush 10.
  • the longitudinal axis X of the core 40 of the brush 10 is rectilinear in the example in question.
  • the envelope surface S defines at least one helical groove 50 which extends along almost the entire length of the portion 40c of the core carrying the bristles and which makes at least a half turn about the longitudinal axis X of the core between the distal and proximal ends thereof, in this case a complete turn.
  • the brush 10 comprises five such helical grooves 50 distributed at equal angles about the axis X.
  • the brush 10 also has rectilinear grooves 80 distributed at equal angles and intersecting the grooves 50.
  • the brush 10 can be manufactured by proceeding as follows.
  • a first brush blank 10 ⁇ as shown in Figure 3 is formed by machining a brush with an envelope surface as a cylinder of revolution about the longitudinal axis X.
  • This blank 10 ⁇ shown in Figure 3 has a conical distal portion 60 converging towards the distal end 40b of the core.
  • the blank 10 ⁇ has a proximal portion 62 with a likewise conical shape converging towards the proximal end of the brush.
  • the portions 60 and 62 are connected by an intermediate portion 61 which is longer than the portions 60 and 62 and which has a slightly conical shape converging towards the distal end of the brush.
  • the total length L of the portion 40c of the core carrying the bristles 41 is for example between 25 and 30 mm, for example of the order of 27 mm.
  • the greatest diameter D of the blank 10 ⁇ is, for example, between 8 and 10 mm, for example of the order of 9 mm.
  • the greatest diameter D is measured at a distance / from the proximal end of the portion 40c of the core.
  • the distance / is preferably between 2 and 6 mm, for example of the order of 4 mm in the example in question.
  • the diameter dd of the distal end face of the blank 10 ⁇ is, for example, between 8 and 10 mm, for example of the order of 9 mm.
  • the diameter d p at the proximal end of the envelope surface is, for example, between 4 and 6 mm, for example of the order of 5 mm.
  • the diameter dd at the distal end is for example between 4 and 5 mm, for example of the order of 4.5 mm, where preferably d p > dd.
  • the distal portion 60 converges more than the intermediate portion 61.
  • the diameter dj at the junction between the portions 61 and 60 is less than the diameter D and is for example between 7 and 9 mm, for example of the order of 8 mm.
  • the junction between the portions 60 and 61 is situated at a distance lj from the distal end of the core preferably greater than the distance /.
  • lj is between 5 and 8 mm, for example of the order of 6.5 mm.
  • the blank 10 ⁇ can also be produced with another shape, in particular with several relative maxima for its cross section.
  • the grooves 50 are machined in it first of all in the rectilinear state, as illustrated in Figures 5 and 6, in order to obtain a blank 10 ⁇ 2
  • these grooves 50 are five in number and are distributed at equal angles about the axis X of the blank.
  • each of the grooves 50 corresponds substantially to the difference D-dd, and it can be slightly greater than D-dd, as can be seen in Figure 6.
  • Each groove 50 has, in cross section, a substantially V-shaped profile as illustrated in Figure 6, with opposite flanks 51.
  • Each flank 51 is convex towards the opposite flank 51 and has a profile in the shape of an arc of a circle.
  • the bottom of each groove 50 has a profile in the shape of an arc of a circle with the concavity facing outwards.
  • Each groove 50 is symmetrical with respect to a median plane containing the axis X.
  • the distal end 50a of the grooves 50 is situated at a non-zero distance t from the distal end of the portion 40c, as can be seen in Figure 5.
  • the grooves 50 go as far as the proximal end of the portion 40c.
  • the portion 40c of the core is twisted about its axis X, which deforms the whole brush and in particular the grooves 50, which assume a helical configuration as shown in Figure 7. This additional twisting is effected in the same direction as the twisting of the branches of the core 40.
  • this twisting entails a complete turn of the proximal end with respect to the distal end of the core portion 40c.
  • the blank 10 ⁇ is obtained.
  • At least one other groove 80 is machined in the blank 10 ⁇ in such a way as to intersect at least one of the helical grooves 50.
  • each groove 80 preferably has, in cross section, a V-shaped profile as illustrated in Figure 9, with flat opposite flanks 81.
  • the grooves 80 are rectilinear with a longitudinal axis parallel to the axis X, and the bottom of the grooves is situated at a distance from the axis X that is substantially the same as the distance of the bottom of the grooves 50 from the axis X, being preferably greater than da/2.
  • the grooves 80 have a distal end which is set back from the distal end of the portion 40c of the core carrying the bristles, as can be seen in Figure 8.
  • the second grooves 80 are offset angularly, at their proximal end, from the first grooves 50.
  • the first grooves 50 all have a proximal end which is distinct from the proximal end of the second grooves 80.
  • the grooves 50 and 80 have different cross sections. Thus, in cross section, the first grooves 50 appear more open than the second grooves 80.
  • Figure 10 shows a variant which differs from the embodiment described above in that the rectilinear grooves 80 are replaced by a helical groove 80 with axis X, which extends about more than one revolution, beginning slightly back from the distal end of the portion 40c carrying the bristles and extending as far as the proximal end.
  • the groove 80 can extend between a quarter turn and three turns.
  • the helix pitch may or may not be the same as for the groove 50.
  • the grooves 50 and 80 intersect substantially at right angles, several times.
  • the variant in Figures 11 and 12 is similar but has a greater number of helical grooves 80, for example as many second grooves 80 as first grooves 50.
  • the grooves 50 and 80 can intersect at right angles, as is illustrated.
  • the helix pitch of the grooves 50 and 80 can be the same, with only the inclination being different.
  • a grid pattern is obtained that defines islands corresponding to portions each following a helical trajectory, these portions each being delimited by two consecutive grooves 50 and by two adjacent grooves 80.
  • the invention is not limited to the exemplary embodiments that have just been described.
  • the number of helical grooves 50 is not limited to five and may be lower, for example one, two, three or four helical grooves, or higher.
  • the pitch of the helical grooves 50 or 80 can be adjusted in such a way that each helical groove 50 or 80 extends, for example, between a quarter of a turn along the entire length of the core portion 40c carrying the bristles, up to 3 complete turns.
  • the profile of the grooves 50 or 80 can be other than V-shaped and can, for example, have a rectangular shape, a semicircular shape or another shape.
  • the shape of the blanks 10 ⁇ or 10 ⁇ can be obtained by cutting out the bristles with the aid of a milling device or by laser or by any other suitable technique.
  • the blank lO ⁇ not to have conical portions, and it can have, for example, a diameter that varies with two relative extremes on either side of a relative minimum, for example what is generally a peanut shape.
  • a groove 50 or 80 can have a constant cross section along the core or, alternatively, a cross section that changes along the core; for example, the depth of the groove varies along the core, or its shape can vary.
  • the width at the bottom of the groove 50 or 80 is less than or equal to 0.5 mm, being for example 0.4 mm, and greater than or equal to 3 mm at the opening of the groove, for example 4.5 mm.
  • a distance of at least 1.5 mm between the bottom of a groove 50 or 80 and the axis X is preferred, this distance being able to be up to 5 mm, for example, for a brush with a greater external diameter of 12 mm.
  • the longitudinal axis of the core is preferably rectilinear; in alternatives it is curved, for example with a radius of curvature of between 30 and 200 mm.
  • At least one rectilinear groove 80 is first of all formed on the blank 10 ⁇ after which at least one helical groove 50 is formed by moving the cutting tool relative to the brush.
  • At least one helical groove 50 is formed without twisting the core, and then the one or more grooves 80 are formed.

Landscapes

  • Brushes (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une brosse (10) permettant d'appliquer un produit sur les cils et/ou les sourcils, comprenant un noyau (40) ayant deux branches torsadées ensemble et des poils (41) serrés entre les branches, ce procédé consistant : a) à produire une ébauche de brosse, dont la surface d'enveloppe définit au moins une première rainure hélicoïdale (50); b) à produire, dans l'ébauche obtenue en a), au moins une deuxième rainure (80) croisant la première rainure.
EP16733405.1A 2015-06-29 2016-06-23 Procédé de fabrication d'une brosse à mascara Withdrawn EP3313230A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1556032A FR3037781B1 (fr) 2015-06-29 2015-06-29 Procede de fabrication d'une brosse a mascara
PCT/EP2016/064630 WO2017001291A1 (fr) 2015-06-29 2016-06-23 Procédé de fabrication d'une brosse à mascara

Publications (1)

Publication Number Publication Date
EP3313230A1 true EP3313230A1 (fr) 2018-05-02

Family

ID=54186124

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16733405.1A Withdrawn EP3313230A1 (fr) 2015-06-29 2016-06-23 Procédé de fabrication d'une brosse à mascara

Country Status (7)

Country Link
US (1) US20180184793A1 (fr)
EP (1) EP3313230A1 (fr)
JP (1) JP2018519093A (fr)
KR (1) KR20180019180A (fr)
CN (1) CN107708477A (fr)
FR (1) FR3037781B1 (fr)
WO (1) WO2017001291A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3015206B1 (fr) * 2013-12-19 2016-01-08 Albea Services Applicateur pour produit cosmetique et ensemble applicateur associe
JP6832162B2 (ja) * 2017-01-10 2021-02-24 株式会社 資生堂 化粧料塗布具
EP4295726A1 (fr) * 2022-06-21 2023-12-27 Chanel Parfums Beauté Applicateur de produit cosmetique comportant des sillons helicoïdaux et article cosmetique comportant un tel applicateur

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4632136A (en) * 1983-11-02 1986-12-30 Plough, Inc. Mascara application system
FR2605505B1 (fr) 1986-10-24 1989-06-02 Oreal Brosse pour l'application de produits cosmetiques
US5551456A (en) 1994-11-03 1996-09-03 Sanderson-Macleod, Inc. Mascara brush construction
US5595198A (en) 1995-06-07 1997-01-21 Risdon Corporation Mascara applicator and method of making the same
US6279583B1 (en) * 1999-12-10 2001-08-28 Color Access, Inc. Mascara brush with multi-length fibers and method of making the same
FR2836347B1 (fr) * 2002-02-25 2004-04-23 Coty Sa Procede de coupe de poils de brosse d'applicateur cosmetique, tube de guidage et machine de mise en oeuvre, ainsi que brosse, systeme applicateur et produit cosmetique correspondants
FR2852500B1 (fr) * 2003-03-20 2007-02-23 Oreal Brosse et dispositif de conditionnement et d'application comportant une telle brosse
US8245716B2 (en) * 2006-09-11 2012-08-21 Albea Services Flocked cosmetic applicators, methods of manufacture and dispensers including such applicators
FR2958130B1 (fr) * 2010-03-30 2012-06-08 Oreal Applicateur pour appliquer un produit sur les cils et/ou sourcils.
FR2980962B1 (fr) * 2011-10-11 2014-03-14 Oreal Applicateur de produit cosmetique et procede de fabrication associe
FR3004090B1 (fr) * 2013-04-08 2015-10-09 Oreal Brosse a mascara
JP2015019814A (ja) * 2013-07-18 2015-02-02 東京パーツ株式会社 液塗布具

Also Published As

Publication number Publication date
JP2018519093A (ja) 2018-07-19
FR3037781A1 (fr) 2016-12-30
WO2017001291A1 (fr) 2017-01-05
US20180184793A1 (en) 2018-07-05
CN107708477A (zh) 2018-02-16
FR3037781B1 (fr) 2019-04-05
KR20180019180A (ko) 2018-02-23

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