Method for producing a member for applying cosmetic product, and associated assembly for the production thereof

Patent metadata

Field	Value
Publication number	US-10279522-B2
Application number	US-201214353659-A
Country	US
Kind code	B2
Filing date	Oct 24, 2012
Priority date	Oct 25, 2011
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

The method for producing a member for applying a cosmetic product comprising:
an application portion ( 3 ); a longitudinal core ( 5 ), housed in the application portion ( 3 );

the method comprising the following successive steps:
a first step for injecting the application portion ( 3 ) into a cavity ( 29 ) of a mold ( 27 ); a second step for injecting the longitudinal core ( 5 ) into the cavity ( 29 ) of the mold ( 27 ).

In the first step, a pin ( 31 ) is arranged in the cavity ( 29 ) and in the second step, the pin ( 31 ) is moved relative to the cavity ( 29 ), and the longitudinal core ( 5 ) is injected into a space ( 47 ) freed up by the pin ( 31 ).

First claim

The invention claimed is:

1. A method for producing a member for applying a cosmetic product, the application member comprising:
an application portion;
a longitudinal core, housed in the application portion; and
wherein the application portion comprises a longitudinal support portion and a plurality of application elements protruding from the support portion, the longitudinal core being housed in the support portion and being radially enclosed in the application portion;

the method comprising the following successive steps:
a first step for injecting the application portion into a cavity of a mold;
a second step for injecting the longitudinal core into the cavity of the mold wherein,
the first step is executed before the second step;
in the first step, a pin is arranged inside the cavity;
in the second step, the pin is moved relative to the cavity and the longitudinal core is injected into a space freed up by the pin.

2. The method according to claim 1 , wherein the pin has a portion having substantially the same shape as the longitudinal core.

3. The method according to claim 1 , wherein, in the first step, the application portion is injected around the pin.

4. The method according to claim 1 , wherein the application portion is made of a first material, the longitudinal core being made of a second material, different to the first.

5. The method according to claim 4 , wherein the second material is more rigid than the first material.

6. The method according to claim 1 , wherein the longitudinal core is injected concomitantly with the movement of the pin.

7. The method according to claim 1 , wherein the injection of the longitudinal core and the movement of the pin are synchronized so that the space freed up by the pin is constantly completely filled with the injected material.

8. The method according to claim 1 , wherein the longitudinal core and the application portion are injected via the same injection orifice of the mold opening into the cavity.

9. The method according to claim 1 , wherein the longitudinal core protrudes from the application portion longitudinally on a first side of the application portion.

10. The method according to claim 1 , wherein the longitudinal core protrudes from the application portion longitudinally on a first side of the application portion, the longitudinal core and the application portion being injected via the same injection orifice of the mold situated longitudinally on a second side of the application portion opposite the first side.

11. The method according to claim 2 , wherein, in the first step, the application portion is injected around the pin.

12. The method according to claim 2 , wherein the application portion is made of a first material, the longitudinal core being made of a second material, different to the first.

13. The method according to claim 3 , wherein the application portion is made of a first material, the longitudinal core being made of a second material, different to the first.

14. The method according to claim 2 , wherein the longitudinal core is injected concomitantly with the movement of the pin.

15. The method according to claim 3 , wherein the longitudinal core is injected concomitantly with the movement of the pin.

16. The method according to claim 4 , wherein the longitudinal core is injected concomitantly with the movement of the pin.

17. The method according to claim 5 , wherein the longitudinal core is injected concomitantly with the movement of the pin.

18. The method according to claim 2 , wherein the injection of the longitudinal core and the movement of the pin are synchronized so that the space freed up by the pin is constantly completely filled with the injected material.

19. A method for producing a member for applying a cosmetic product, the application member comprising:
an application portion;
a longitudinal core, housed in the application portion; and
wherein the application portion comprises a longitudinal support portion and a plurality of application elements protruding from the support portion, the longitudinal core being housed in the support portion and being radially enclosed in the application portion;

the method comprising the following successive steps:
a first step for injecting the application portion into a cavity of a mold;
a second step for injecting the longitudinal core into the cavity of the mold wherein,
the first step is executed before the second step;
in the first step, a pin is arranged inside the cavity;
in the second step, the pin is moved relative to the cavity and the longitudinal core is injected into a space freed up by the pin;
the longitudinal core is injected concomitantly with the movement of the pin;
the injection of the longitudinal core and the movement of the pin are synchronized so that a space freed up by the pin is constantly completely filled with an injected material.

20. The method according to claim 19 , wherein the support portion and the application elements are made of a same first material, the longitudinal core being made of a second material, different from the first, the second material being more rigid than the first material.

21. The method according to claim 19 , wherein the support portion defines a cavity, the cavity being substantially cylindrically shaped and closed at one longitudinal extremity, the cavity housing an extremity of the longitudinal core.

22. The method according to claim 21 , wherein the application portion is in radial contact with the longitudinal core on an entire inner surface of the cavity the inner surface being substantially cylindrical in shape.

23. The method according to claim 19 , wherein the longitudinal core protrudes from the application portion through a single opening thereof.

24. The method according to claim 19 , wherein the second portion completely surrounds a radial surface of the longitudinal core.

25. The method according to claim 19 , wherein the application portion extends externally from the longitudinal member along a radial direction.

26. The method according to claim 19 , wherein the application elements are integrally formed with the support portion.

27. The method according to claim 19 , wherein longitudinal core is formed of a single part.

Assignees

• Oreal

Inventors

• Charnay Patrick

Classifications

• B29L2031/718

  Cosmetic equipment, e.g. hair dressing, shaving equipment (brushes B29L2031/42, combs B29L2021/005) · CPC title

• B29L2031/42

  Brushes · CPC title

• A46D3/00

  Preparing, {i.e. Manufacturing} brush bodies · CPC title

• B29C45/1671 Primary

  with an insert · CPC title

• B29C45/1635

  using displaceable mould parts, e.g. retractable partition between adjacent mould cavities · CPC title