Brush for application of mascara on eyelashes

Details Brush for application of mascara on eyelashes Brush for application of mascara on eyelashes

2000-04-28

2001-11-13

Wilson, John J. (Department: 3732)

Toilet

Hair device

Eyelash or eyebrow

C132S317000, C132S313000, C132S216000

Reexamination Certificate

active

06314967

ABSTRACT:

This invention relates to a brush for use in applying makeup on eyelashes, more precisely a brush impregnated with a product that will subsequently be applied on eyelashes so that mascara is applied to them to make them more esthetic.
This invention relates to a brush for applying mascara under optimum conditions, more precisely by a single application on eyelashes based on structural characteristics that induce better absorption of the makeup product used.
Conventional brushes used to apply mascara on eyelashes are traditionally structured using relatively long tufts of fibers arranged helically around a support or core composed of a twisted metal wire.
More precisely, these brushes are usually manufactured using relatively ductile fibers appropriate for making up something as delicate as eyelashes, usually made of different variants of nylon, taking advantage of the moisture absorption property of this material.
Furthermore, as everyone knows, the brush is used by dipping it into a receptacle containing the makeup and moving it over a wiper which is designed to leave the necessary quantity of mascara uniformly distributed on the brush so that a uniform quantity of the said product is applied on the eyelashes.
However, due to the nature of the fibers used, this operation does not guarantee that the product will be satisfactorily distributed over the entire brush since the said fibers bend in the direction of the brush centerline due to the proximity of the fibers and their flexibility, with the result that a concentration of the product is created within the said brush greater than the quantity of the product retained by the fibers in the part of the said fibers that come into contact with the eyelashes.
Consequently, the user finds difficult to obtain a good result with a single pass, and needs to make repeated applications.
There are several solutions on the market for solving this problem based on consistency between various parameters such as the diameter of the fiber used, different types of fiber cross-section, and miscellaneous surface finishes (smooth or with longitudinal slits parallel to the axis of the fiber, a variable number of fibers in the tufts, different diameters of metal wire, different numbers of turns in the helical part of the brush, etc.)
In practice, the use of fibers with longitudinal slits along their surface parallel to the axis of the said fibers is designed such that the product fills these slits, thus forming a sort of “stock” in which the product is retained in the area located close to the free end of the tufts, where the fibers come into contact with the user's eyelashes.
However, the results obtained in this case are really not satisfactory, which is why repeated applications are necessary to obtain a satisfactory result, as mentioned above.
The brush according to this invention solves the problem mentioned above satisfactorily by enabling application of the product under optimum conditions, and consequently makeup can be applied to the eyelashes in a single application.
Consequently and more precisely, starting from a structure similar to the structure of a conventional brush, in other words based on tufts of fibers laid out helically around a core or support composed of a twisted steel wire, the characteristics of the above mentioned brush are based on the fact that the said fibers consist of a combination of plastic fibers and vegetable fibers, preferably made of cotton, linen or the like, and satisfactorily distributed.
Vegetable fibers are added to the brush so that they can act as a depository for the mascara by making use of their absorption capacity, and also act as spacers for the plastic fibers since they are located in the spaces between the plastic fibers, so that the spacing between plastic fibers is more than usual. Thus, in addition to being made up, the eyelashes are also combed at the same time, consequently each plastic fiber is supplied with mascara by the adjacent vegetable fibers resulting in a better application of the product on the eyelashes.
The plastic fibers used may have any of the characteristics used in conventional brushes, such as a smooth, solid or hollow outside surface, longitudinal slits being formed in the outside surface, and also preferably the diameter must be of the order of 0.17 mm whereas the maximum diameter of the vegetable fibers (preferably cotton, linen or the like) will be of the order of 0.6 mm and may be composed of 1 or several pieces.
Furthermore, the proportion of vegetable fibers in the general context of the brush, in other words compared with the total number of fibers, may be between 10 and 50%.
Finally, the diameter of the metal wire forming the core of the brush and the fiber attachment element, should also preferably be between 0.50 and 0.75 mm and the pitch of the spiral formed by the fiber is between 1 and 2 mm.


REFERENCES:
patent: 3965664 (1976-06-01), Goetti et al.
patent: 5765573 (1998-06-01), Guest

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