EP2276370A2 - Kosmetische applikatoranordnung - Google Patents

Kosmetische applikatoranordnung

Info

Publication number
EP2276370A2
EP2276370A2 EP09743246A EP09743246A EP2276370A2 EP 2276370 A2 EP2276370 A2 EP 2276370A2 EP 09743246 A EP09743246 A EP 09743246A EP 09743246 A EP09743246 A EP 09743246A EP 2276370 A2 EP2276370 A2 EP 2276370A2
Authority
EP
European Patent Office
Prior art keywords
polymeric
brush
core
elongated
tines
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.)
Granted
Application number
EP09743246A
Other languages
English (en)
French (fr)
Other versions
EP2276370A4 (de
EP2276370B1 (de
Inventor
Herve F. Bouix
Christophe Jacob
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.)
ELC Management LLC
Original Assignee
ELC Management LLC
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 ELC Management LLC filed Critical ELC Management LLC
Publication of EP2276370A2 publication Critical patent/EP2276370A2/de
Publication of EP2276370A4 publication Critical patent/EP2276370A4/de
Application granted granted Critical
Publication of EP2276370B1 publication Critical patent/EP2276370B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • A45D40/262—Appliances specially adapted for applying pasty paint, e.g. using roller, using a ball using a brush or the like
    • A45D40/265—Appliances specially adapted for applying pasty paint, e.g. using roller, using a ball using a brush or the like connected to the cap of the container
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/16—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by wires or other anchoring means, specially for U-shaped bristle tufts
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/18—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier the bristles being fixed on or between belts or wires
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/20—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier the bristles being fixed or joined in rubber bodies, e.g. in soft rubber
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/002—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions
    • A46B5/0025—Brushes with elastically deformable heads that change shape during use
    • A46B5/0029—Head made of soft plastics, rubber or rubber inserts in plastics matrix
    • 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
    • A46B9/06—Arrangement of mixed bristles or tufts of bristles, e.g. wire, fibre, rubber
    • 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
    • A45D40/262—Appliances specially adapted for applying pasty paint, e.g. using roller, using a ball using a brush or the like
    • A45D40/265—Appliances specially adapted for applying pasty paint, e.g. using roller, using a ball using a brush or the like connected to the cap of the container
    • A45D40/267—Appliances specially adapted for applying pasty paint, e.g. using roller, using a ball using a brush or the like connected to the cap of the container comprising a wiper
    • 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 applicators for applying cosmetics to human hairs or eyelashes, and specifically to a cosmetic applicator assembly that includes a bi-injection molded polymeric brush complementarily engaged with a twisted wire brush.
  • the bi-injection molded polymeric brush of the present invention comprises an elongated polymeric core formed of a first, relatively stiffer polymeric material and multiple protruding polymeric tines formed of a second, relatively softer polymeric material.
  • a cosmetic brush is typically used for applying cosmetic (e.g., mascara and the like) to an application area, e.g., a user's hairs or eyelashes. Such a cosmetic brush can also be used for separating hairs or eyelashes and removing excess cosmetic therefrom.
  • cosmetic e.g., mascara and the like
  • One common type of cosmetic brush includes a twisted wire brush formed by first folding a single metallic wire into a generally U-shaped configuration to provide a pair of parallel wire segments, then disposing multiple relatively soft bristles (also referred to as filaments or fibers, which are typically formed of nylon strands) between a portion of a length of the wire segments, which holds or clamps the soft bristles securely at their midpoints, followed by twisting or rotating the wire segments about each other, thereby forming a helical core (also known as a twisted wire core) with soft bristles radially extending therefrom in a helical or spiral manner.
  • a helical core also known as a twisted wire core
  • the radially extending soft bristles jointly form a bristle portion or a bristle head of the twisted wire brush, which can be used for applying a coating of mascara or other cosmetic onto hairs or eyelashes of a user.
  • the soft and flexible bristles of the twisted wire brush are particularly effective in providing a good grip over the fine hairs or eyelashes and allowing the mascara to thoroughly coat over the hairs or eyelashes.
  • the mascara-coated hairs or eyelashes have a tendency to stick to one another and form unaesthetic clumps.
  • the above-described twisted wire brushes with soft bristles although effective in applying mascara onto the hairs or eyelashes, cannot sufficiently separate the clumped hairs or eyelashes from one another.
  • a post-application doctoring or arrangement step can be carried out to separate the clumped hairs or eyelashes, by using a separate twisted wire brush with relatively stiff bristles or more preferably, a separate comb with stiff teeth.
  • U.S. Patent No. 3,921,650 discloses a cosmetic applicator having a handle and a rod, while one end of the rod contains a comb with relatively stiff teeth extending perpendicularly from one side of a base portion, a twisted wire brush with relatively soft bristles extending perpendicularly from the other side of the base portion, and a serrated portion at the tip of the rob.
  • U.S. Patent No. 6,408,857 discloses a cosmetic applicator including a twisted wire brush with relatively soft bristles that is bent into a closed loop, and into this loop is inserted a comb with relatively stiff teeth extending from either one side or both sides.
  • the teeth of the comb are offset from the bristles of the twisted wire brush, so that the cosmetic application has a cross-section that resembles either a "T" (if the comb only has teeth extending from one side) or a "+" (if the comb has teeth extending from both sides).
  • 2004/0221865 discloses a mascara brush containing both an application brush part and an arrangement brush part.
  • the arrangement brush part includes a comb with relative stiff teeth formed by injection molding, while the application brush part includes a twisted wire brush with relatively soft bristles.
  • the arrangement brush part and the application brush part are affixed to each other so that the teeth of the comb are offset from the bristles of the twisted wire brush, thereby forming a brush head with both stiff teeth and soft bristles.
  • Combs in the above-described prior art integrated cosmetic applicators are typically formed by a single injection molding process, in which a hot molten polymer is first injected into a mold and then cooled down to form a molded article.
  • both the teeth of the comb and the core of the comb are formed by the same polymer. Because the core of the comb provides structural support for the entire comb, the polymer that forms such core has to be hard enough to provide the required structural support.
  • the teeth of the comb when formed of the same hard polymer, may be too stiff or rigid that they lose grip on the hairs or eyelashes and are not able to get between the clumped hairs or eyelashes.
  • combs of the prior art integrated cosmetic applicators described hereinabove may not be effective in separating the clumped hairs or eyelashes.
  • the present invention relates to an integrated cosmetic applicator assembly containing a polymeric brush and a twisted wire brush.
  • the polymeric brush has an elongated polymeric core and multiple polymeric tines protruding from the elongated polymeric core. More specifically, the elongated polymeric core comprises a first polymeric material of a first tensile modulus, while at least some of the polymeric tines comprise a second polymeric material of a second tensile modulus that is smaller than the first tensile modulus.
  • the twisted wire brush comprises a metal wire core and multiple bristles protruding from the metal wire core.
  • the elongated polymeric core of the polymeric brush is adapted for complementarily engaging at least a portion of the metal wire core of the twisted wire brush to form the integrated cosmetic applicator assembly.
  • the integrated cosmetic applicator assembly of the present invention can be used to effectively perform both the application function and the doctoring/arrangement function.
  • the twisted wire brush with relatively soft bristles is useful for applying a liquid or semi-liquid cosmetic product (e.g., mascara) to human hairs or eyelashes, while the polymeric brush with relatively stiff tines (in comparison with the bristles of the twisted wire brush) is useful for subsequent separation and arrangement of such hairs or eyelashes.
  • the polymeric brush may comprise relatively soft tines useful for applying the cosmetic product to human hairs or eyelashes, while the twisted wire brush may comprise relative stiff bristles useful for subsequent separation and arrangement of the hairs or eyelashes. More importantly, by forming at least some of the protruding tines of the polymeric brush with a polymeric material (i.e., the second polymeric material) relatively softer than the polymeric material used for forming the core of the polymeric brush (i.e., the first polymeric material), the polymeric brush achieves a much better grip on the hairs or eyelashes, while the core of the polymeric brush can continue to provide the required structural support so that the polymeric brush of the present invention can still retain its overall shape during the doctoring/arrangement step, without significant bending or distortion.
  • a polymeric material i.e., the second polymeric material
  • the core of the polymeric brush can continue to provide the required structural support so that the polymeric brush of the present invention can still retain its overall shape during the doctoring/arrangement step, without significant
  • complementary engaging refers to formation of an interlocking relationship between two or more complementary elements or structures.
  • polymer or “polymeric” as used herein refers to any material, composition, structure, or article that comprises one or more polymers, which can be homopolymers, copolymers, or polymer blends.
  • the present invention relates to a polymeric cosmetic brush for use in combination with a twisted wire cosmetic brush.
  • Such polymeric cosmetic brush contains an elongated polymeric core having a longitudinal axis and multiple polymeric tines protruding from the elongated polymeric core.
  • the elongated polymeric core comprises a first polymeric material of a first tensile modulus, while at least some of the polymeric tines comprise a second polymeric material of a second tensile modulus that is less than the first tensile modulus.
  • the elongated polymeric core further comprises one or more protrusions and/or recesses adapted for complementarily engaging one or more corresponding portions of a twisted wire brush.
  • the present invention relates to simply a polymeric cosmetic brush comprising an elongated polymeric core having a longitudinal axis and multiple polymeric tines protruding from the elongated polymeric core, such elongated polymeric core comprising a first polymeric material of a first tensile modulus, while at least some of the polymeric tines comprising a second polymeric material of a second tensile modulus that is less than the first tensile modulus.
  • the present invention relates to a method of making a cosmetic applicator assembly, comprising: forming a polymeric brush comprising an elongated polymeric core and multiple polymeric tines protruding from the elongated polymeric core, wherein the elongated polymeric core comprises a first polymeric material of a first tensile modulus, wherein at least some of the polymeric tines comprise a second polymeric material of a second tensile modulus that is less than the first tensile modulus, wherein the elongated polymeric core further comprises one or more protrusions and/or recesses adapted for complementarily engaging one or more corresponding portions of a twisted wire brush; forming a twisted wire brush comprising a metal wire core and multiple bristles protruding from the metal wire core; and complementarily engaging the elongated polymeric core of the polymeric brush with one or more portions of the twisted wire brush to form the cosmetic applicator assembly.
  • the polymeric brush as described hereinabove is formed by a bi-injection molding process, in which two or more different polymeric materials are simultaneously injection molded to form one article.
  • a bi-injection molding process in which two or more different polymeric materials are simultaneously injection molded to form one article.
  • FIG. IA is a perspective view of an exemplary polymeric brush, according to one embodiment of the present invention.
  • FIG. IB is a top view of the exemplary polymeric brush of FIG. IA.
  • FIG. 1C is a representative or schematic cross-sectional view of the exemplary polymeric brush of FIGS. IA and IB, along the line A-A in FIG. IB.
  • FIG. 2A is a side view of an exemplary twisted wire brush, according to one embodiment of the present invention.
  • FIG. 2B is a representative or schematic cross-sectional view of the exemplary twisted wire brush of FIG. 2A, along the line B-B.
  • FIG. 3A is a side view of a cosmetic applicator assembly formed by complementarily engaging the polymeric brush of FIGS. IA- 1C with the twisted wire brush of FIGS. 2A-2B, according to one embodiment of the present invention.
  • FIG. 3B is a perspective view of the cosmetic applicator assembly of FIG. 3A.
  • FIG. 3 C is a representative or schematic cross-sectional view of the cosmetic applicator assembly of FIGS. 3A-3B, alone the line C-C in FIG. 3 A.
  • FIG. 4 is a side view of a cosmetic package comprising the cosmetic applicator assembly of FIGS. 3A-3C as mounted on one end of a rod, while a cap is mounted at the other end of the rod and adapted for complementarily engaging a neck portion of a cosmetic container, according to one embodiment of the present invention.
  • FIGS. 5-6 are perspective views of exemplary polymeric brushes with polymeric tines of alternative shapes, according to alternative embodiments of the present invention.
  • FIG. 7A is a perspective view of an exemplary polymeric brush having curved polymeric tines, according to one embodiment of the present invention.
  • FIG. 7B illustrates the relative positions of two representative tines of the exemplary polymeric brush of FIG. 7A, as located adjacent to each other in the same row.
  • the present invention provides an integrated cosmetic applicator assembly containing both a twisted wire brush and a bi-injection molded polymeric brush.
  • the bi-injection molded polymeric brush of the present invention contains an elongated polymeric core formed of a first, relatively stiff polymeric material and multiple protruding polymeric tines formed of a second, relatively soft polymeric material.
  • the softer tines of such a bi-injection molded polymeric brush are believed to provide a much better grip on the hairs or eyelashes and is therefore more effective in separating clumped hairs or eyelashes, while the stiff core of such a bi-injection molded polymeric brush can continue to provide the required structural support, so that the polymeric brush of the present invention can still retain its overall shape during the doctoring/arrangement step, without significant bending or distortion.
  • FIGS. IA- 1C shows various views of a bi-injection molded polymeric brush 1, according to one exemplary embodiment of the present invention.
  • the bi-injection molded polymeric brush 1 includes a handle portion 10 and a brush head portion 20.
  • the brush head portion 20 has an elongated polymeric core 24 and multiple polymeric tines 26, which protrude perpendicularly from the elongated polymeric core 24.
  • the elongated polymeric core 24 is formed of a first, relatively stiff polymeric material, while at least some (and preferably all) of the multiple polymeric tines 26 are formed of a second, relatively soft polymeric material.
  • the first, relatively stiff polymeric material can be characterized by a first tensile modulus preferably ranging from about 800 MPa to about 3000 MPa
  • the second, relatively soft polymeric material can be characterized by a second tensile modulus that is less than the first tensile modulus, which preferably ranges from about 35 MPa to about 1200 MPa.
  • the first tensile modulus ranges from about 1000 MPa to about 2000 MPa, and the second tensile modulus ranges from about 95 MPa to about 570 MPa. Most preferably, the first tensile modulus ranges from about 1250 MPa to about 1600 MPa, and the second tensile modulus ranges from about 200 MPa to about 280 MPa.
  • Exemplary polymers that can be used as the first polymeric material in the present invention include, but are not limited to: ethylene-propylene diene monomer or EDPM rubber, ethylene vinyl acetate copolymer, acrylonitrile polymers, polyamide, polycarbonate, polyester, polyethylene terephthalate, polymethyl methacrylate, polyolefins (such as, for example, polyethylene and polypropylene), polyoxymethylene, polystyrene, polyurethane, and acrylonitrile butadiene styrene.
  • Exemplary polymers that can be used as the second polymeric material in the present invention include, but are not limited to: silicone elastomers, thermoplastic elastomers (such as, for example, styrene-ethylene- butylene-styrene or SEBS block copolymer), vinyl elastomers (such as ethyl vinyl acetate or EVA), thermoplastic polyester elastomers (such as those commercialized under the trademark Hytrel ® by Du Pontde Nemours), thermoplastic polyurethane elastomers (such as those commercialized under the trademark Pellethane ® by Dow Chemical Company), acrylonitrile polymers, and ethylene propylene diene monomer or EDPM rubber.
  • silicone elastomers such as, for example, styrene-ethylene- butylene-styrene or SEBS block copolymer
  • vinyl elastomers such as ethyl vinyl acetate or EVA
  • the first polymeric material is polypropylene
  • the second polymeric material is a silicone elastomer or a thermoplastic polyester elastomer.
  • the first polymeric material is polycarbonate or acrylonitrile butadiene styrene
  • the second polymeric material is a thermoplastic polyurethane elastomer.
  • the first polymeric material is polyoxymethylene
  • the second polymeric material is a thermoplastic polyester elastomer.
  • the elongated polymeric core 24 of the polymeric brush 1 may comprise one or more protrusions and/or recesses for complementarily engaging one or more corresponding portions of a metal wire core of a twisted wire brush.
  • protrusion as used herein broadly covers any protruding structure, which includes, but is not limited to: clips, hooks, spikes, nodes, lugs, pins, and tabs.
  • reces as used herein broadly covers any recessing structure, which includes, but is not limited to: surface openings (such as grooves, pits or holes), loops, bores, central lumens, and clearances.
  • the elongated polymeric core 24 may comprise a surface groove that extends along the longitudinal axis of the polymeric core 24, and at least one portion of the metal wire core of the twisted wire brush can be inserted into such surface groove, as described by U.S. Patent No.
  • the elongated polymeric core 24 may comprise an annular surface groove, and at least one portion of the metal wire core of the twisted wire brush forms a loop that is adapted to engage such annular surface groove of the elongated polymeric core 24, as described by U.S. Patent No. 6,408,857, the content of which is incorporated by reference in its entirety for all purposes.
  • the elongated polymeric core 24 contains a central lumen 22 with at least one opening at one side of the elongated polymeric core 24, as illustrated in FIGS. IA- 1C.
  • Such a central lumen 22 may extend through the entire length of the elongated polymeric core 24, or it may extend only through a portion thereof and close at a distal end 24T of the polymeric core 24, as shown in FIGS. 1A-1B.
  • the opening in the central lumen 22 is preferably characterized by an angel ⁇ (shown in FIG. 1C), which ranges from about 1° to about 90°, more preferably from about 15° to about 75°, and most preferably from about 30° to about 60°.
  • the handle portion 10 of the exemplary polymeric brush 1 includes a central lumen 12 that connects with the central lumen 22 of the elongated polymeric core 24. Further, the central lumen 12 has a narrow aperture or slit 14 that also connects with the opening of the central lumen 22 of the elongated polymeric core 24.
  • the central lumens 12 and 22 in the polymeric brush 1 are adapted for accommodating the metal wire core of a twisted wire brush, with which the polymeric brush 1 is to be complementarily engaged.
  • the slit 14 at the handle portion 10 allows the soft bristles of the twisted wire brush to pass through the handle portion 10 with little or no bending, and the opening of the central lumen 22 in the elongated polymeric core 24 accommodates the soft bristles of the twisted wire brush and allow them to fully extend outward from the elongated polymeric core 24.
  • FIG. 2A shows the side view of an exemplary twisted wire brush 2, with which the polymeric brush 1 of FIGS. IA- 1C is to be complementarily engaged.
  • the twisted wire brush 2 includes a metal wire core 30, which is formed by folding a single metallic wire into a U-shape to provide a pair of parallel wire segments, and then twisting or rotating the pair of wire segments about each other in a helical manner.
  • the twisted wire brush 2 also includes multiple soft and flexible bristles 42 and 44 of different lengths, which extend radially from the metal wire core 30.
  • the longer bristles 42 are arranged at one side of the metal wire core 30, while the shorter bristles 44 are arranged at the other side of the metal wire core 30, as shown in the cross-sectional view of FIG. 2B. More specifically, when viewed at the cross-section, the longer bristles 42 jointly form a fan-shaped configuration around the metal wire core 30, and such configuration is preferably characterized by an angel that is the same as the angle ⁇ shown in FIG. 1C.
  • the twisted wire brush 2 of FIG. 2A-2B can be complementarily engaged with the polymeric brush 1 of FIG. 1A-1C to form a cosmetic applicator assembly 3, as shown in FIGS. 3A-3C.
  • the shorter bristles 44 and the metal wire core 30 of the twisted wire brush 2 can fit into the central lumen 22 of the polymeric brush 1, while the longer bristles 42 of the twisted wire brush 2 can fully extend outward from the opening of the central lumen 22 of the polymeric brush 1.
  • the metal wire core 30 of the twisted wire brush 22 may extend along the entire length of the polymeric brush 1 through the central lumens 22 and 12 of the polymeric brush 1 and further outwards.
  • the resulting cosmetic applicator assembly 3 therefore has the polymeric tines 26 on one side and the soft bristles 42 on the other side, as shown in FIG. 3C.
  • all of the protruding polymeric tines of the polymeric brush comprise the second, relatively soft polymeric material.
  • some of the protruding polymeric tines of the polymeric brush comprise the second, relatively soft polymeric material, while other tines may comprise the first, relatively stiff polymeric material that is used to form the elongated polymeric core of the polymeric brush.
  • some of the protruding polymeric tines may even comprise a third polymeric material that is different from the first and second polymeric materials.
  • Such different polymeric tines of different compositions can be arranged in any configurations with respective to one another, either randomly or into an orderly pattern.
  • the polymeric tines of the same composition may be arranged into one or more straight rows that are substantially parallel to the longitudinal axis of the elongated polymeric core of the polymeric brush, or into one or more spirals that wind around the longitudinal axis of the elongated polymeric core.
  • substantially perpendicular or “substantially parallel” as used herein refers to less than 10 degrees of deviation from a perpendicular or parallel direction.
  • the polymeric brush of the present invention may have tines of any size, shape, and spacing suitable for its intended functions, e.g., application, arrangement, and/or separation of human hairs or eyelashes.
  • the tines of the polymeric brush of the present invention have an average height ranging from about 0.1 mm to about 10 mm, more preferably from about 0.5 mm to about 7 mm, and most preferably from about 0.8 mm to about 5 mm.
  • the average cross-sectional diameter of the polymeric tines preferably ranges from about 0.1 mm to about 2 mm, more preferably from about 0.2 mm to about 1.5 mm, and most preferably from about 0.3 mm to about 0.9 mm.
  • the polymeric brush preferably has cylinder-shape tines with tapered ends, as shown in FIGS. 1 A-3C.
  • the polymeric brush may have spike-shaped polymeric tines 26', as shown in FIG. 5.
  • the polymeric brush of the present invention may have fin- shaped polymeric tines 26", as shown in FIG. 6.
  • the polymeric tines of the polymeric brush can either have the same size and/or shape, or have different sizes and/or shapes.
  • the tines can be spaced or arranged in any suitable manner.
  • the tines can be arranged into straight rows that are substantially parallel to the longitudinal axis of the polymeric brush (as shown in the drawing figures described hereinabove), or zigzagged rows with center lines substantially parallel to the longitudinal axis of the polymeric brush, or spiral rows that wind around the longitudinal axis of the polymeric brush.
  • the polymeric tines can be arranged substantially perpendicular to the surfaces of the elongated polymeric core of the polymeric brush, as shown in the above-described drawings.
  • the tines can be tilted or slanted from the surfaces of the elongated polymeric core by any angle ranging from about 5 degrees to about 85 degrees.
  • tines in the same row may curve or bend in such a manner that top portions of adjacent tines in the same row are curved away from each other with respect to the center line of the row, as described by U.S. Patent No. 6,581,610, the content of which is incorporated herein by reference in its entirety for all purposes, and as illustrated in FIGS. 7A and 7B.
  • tines 126A and 126B in the same row 124 can be curved away from each other with respect to the center line of the row 124 (as indicated by the dotted line).
  • the cosmetic applicator assembly as described hereinabove may further comprise one or more optional components, such as, for example, a cap 54 and a rod 52 that extends from the cap 54, as shown in FIG. 4.
  • the rod 52 may contain a recess or protrusion adapted for complementarily engaging the handle portion 10 of the polymeric brush 1 and the metal wire core 30 of the twisted wire brush 2.
  • the cap 54 is adapted for complementarily engaging a neck portion 62 of a cosmetic container 60 that contains therein a liquid or semi-liquid cosmetic, such as mascara.
  • the cap 54 contains internal threads (not shown), and the neck portion 62 of the container 60 contains external threads 64 that are complementary to the internal threads of the cap 54, so that the cap 54 can be screwed onto the container 60 in a leak-tight manner.
  • affixation means or mechanisms either mechanical or adhesive-based, can be readily used for affixing or otherwise engaging the cap 54 with the neck portion 62 of the container 60.
  • the neck portion 62 of the container 60 may also contain one or more internal wiper structures (not shown) for removing excess cosmetic from the cosmetic applicator assembly 3 when the cosmetic applicator assembly is being removed from the container 60.
  • the polymeric brush of the present invention can be readily formed by a bi-injection molding process, in which two different thermoplastic or thermosetting polymers are injection-molded together to form a single article, i.e., the polymeric brush of the present invention.
  • a first polymer with a relatively high tensile modulus can be melted and injected at high pressure into a first mold, which preferably contains two or more solid parts that are complementarily engaged with one another to define at least a first cavity therein.
  • the first cavity may correspond to the desired shape of the elongated polymeric core to be formed.
  • the two or more solid parts of the first mold are disengaged from one another to expose an elongated polymeric core formed by the solidified first polymer.
  • the elongated polymeric core so formed is then transferred into a second mold, which also contains two or more solid parts complementarily engaged with one another to define cavities that not only accommodate the elongated polymeric core already formed, but also define the desired shapes of the polymeric tines to be formed.
  • a second polymer with a relatively low tensile modulus, preferably already melted, can be injected at high pressure into the second mold.
  • the two or more solid parts of the second mold are disengaged from one another, thereby exposing multiple polymeric tines that have been molded over the elongated polymeric core to form the polymeric brush of the present invention.
  • the time interval between the first and second molding step is relatively short, e.g., less than 20 minutes, more preferably less than 10 minutes, and most preferably less than 2 minutes, so that the surface of the elongated polymeric core is still hot from the first molding step when the second molding commences.
  • the surface energy of the elongated polymeric core remains relatively high when the molten second polymer is injected into the second mold, which allows the second polymer to readily adhere to the surface of the elongated polymeric core.
  • the polymeric tines can therefore be adhered to the surface of the elongated polymeric core without the need for any adhesive.
  • the surface of the elongated polymeric core may contain any suitable patterns (e.g., recesses or grooves) for increasing the adhesion or attachment between the polymeric tines and the elongated polymeric core.

Landscapes

  • Brushes (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
EP09743246.2A 2008-05-06 2009-04-17 Kosmetische applikatoranordnung Active EP2276370B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/115,583 US20090276973A1 (en) 2008-05-06 2008-05-06 Cosmetic Applicator Assembly
PCT/US2009/040889 WO2009137259A2 (en) 2008-05-06 2009-04-17 Cosmetic applicator assembly

Publications (3)

Publication Number Publication Date
EP2276370A2 true EP2276370A2 (de) 2011-01-26
EP2276370A4 EP2276370A4 (de) 2014-03-12
EP2276370B1 EP2276370B1 (de) 2015-10-28

Family

ID=41265287

Family Applications (1)

Application Number Title Priority Date Filing Date
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US (1) US20090276973A1 (de)
EP (1) EP2276370B1 (de)
JP (1) JP5277311B2 (de)
KR (1) KR20110005302A (de)
CN (1) CN102014691B (de)
AU (1) AU2009244638A1 (de)
CA (1) CA2722569C (de)
ES (1) ES2559869T3 (de)
WO (1) WO2009137259A2 (de)

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Publication number Priority date Publication date Assignee Title
WO2019072773A1 (en) 2017-10-12 2019-04-18 L'oreal APPLICATOR FOR APPLYING A PRODUCT ON KERATIN MATERIALS

Also Published As

Publication number Publication date
WO2009137259A2 (en) 2009-11-12
EP2276370A4 (de) 2014-03-12
CA2722569A1 (en) 2009-11-12
CN102014691B (zh) 2014-07-16
AU2009244638A1 (en) 2009-11-12
US20090276973A1 (en) 2009-11-12
JP5277311B2 (ja) 2013-08-28
JP2011519670A (ja) 2011-07-14
ES2559869T3 (es) 2016-02-16
CA2722569C (en) 2014-06-17
CN102014691A (zh) 2011-04-13
KR20110005302A (ko) 2011-01-17
EP2276370B1 (de) 2015-10-28
WO2009137259A3 (en) 2010-03-04

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