Toilet – Hair device – Comb
Reexamination Certificate
1999-08-31
2001-09-11
Wilson, John J. (Department: 3732)
Toilet
Hair device
Comb
C132S115000, C132S112000
Reexamination Certificate
active
06286518
ABSTRACT:
The present invention relates to a device for applying a more or less viscous product to the hair, particularly a dye product.
BACKGROUND OF THE INVENTION
Currently, hair dye products are applied to the hair using brushes. This conventional procedure has the drawback that it places the dye product in contact with the scalp, which may give rise to certain skin reactions, particularly allergic reactions.
Moreover, the production of special dye effects, for example on individual locks of hair, is difficult to achieve using the current technique without appropriate application devices.
DESCRIPTION OF THE PRIOR ART
There is a device for applying a product to the hair, comprising a product reservoir and an application head equipped with teeth. The reservoir has flexible walls and the head comprises channels which open out in this reservoir on the one hand and between the teeth on the other. The teeth may thus be supplied with product when pressure is exerted on the reservoir and allow this product to be distributed over the hair as it passes between them.
Devices of this type do not, however, always give satisfaction in practice. It is actually difficult to exert a substantially constant pressure on the reservoir with a view to controlling the emission of the appropriate quantity of product as it is applied to the hair. The irregular emission of product gives rise to unexpected runs and thus causes this product to come into contact with the scalp. These runs also give rise to a random distribution of product over the hair, making it impossible to obtain the aforesaid dye effects, particularly on individual locks of hair.
SUMMARY OF THE INVENTION
The present invention aims to remedy all these drawbacks.
The device it relates to comprises, in a manner known per se, a reservoir containing the product to be applied and a head for dispensing this product, equipped with at least one row of application teeth, this head being connected to the reservoir by at least one channel opening out in the reservoir on the one hand and near the base of the teeth on the other to allow the product to flow from this reservoir toward this base of the teeth.
According to the invention, the head comprises at least one row of teeth, hereinafter called “retention teeth”, extending along each row of application teeth and located at a distance from the latter, these retention teeth being shorter than the application teeth; the space between one row of application teeth and an adjacent row of retention teeth, and the spaces between the teeth in these two rows, are such that it permit [sic] the hair to pass between the teeth of these rows but such that they allow the product to be retained in them so that said space located between one row of application teeth and an adjacent row of retention teeth forms an intermediate product reservoir capable of receiving and temporarily retaining this product.
This reservoir, at the level at which the channel or channels for conveying the product opens or open out, is located at the base of the application teeth and allows the hair to pass through it so that the latter can be loaded with product. This intermediate reservoir may be supplied periodically with product according to requirements so that it allows regulation and monitoring of the emission of product and thus the uniform application of the latter over the hair.
Thus, by virtue of the invention, the product is at no time placed in contact with the scalp and there is no risk of such contact occurring.
The channel or channels for conveying the product may open out between the teeth of one or other of the rows but, preferably, open out between two adjacent rows of application and retention teeth.
The device according to the invention may be a single-use device and have application teeth having a shape which is adapted to the viscosity of the product it is specifically intended to apply. Thus, in the case of a product having a relatively high viscosity, i.e. having a cream consistency, each application tooth has a base of cylindrical shape extending substantially as far as the top of the retention teeth whilst each of the latter has a substantially conical shape. In the case of a product having a medium or low viscosity, i.e. having, respectively, a gel or oil consistency, each application tooth has an oval-shaped section extending substantially as far as the top of the retention teeth whilst each of the latter has a substantially conical shape.
These arrangements have been found to allow the hair to be fully impregnated with product, depending on the viscosity of the latter, without the retention teeth forming an obstacle to the passage of the hair over them.
At the top, the application teeth may have a conical shape or the shape of a shell.
According to a preferred embodiment of the invention, the head comprises two lateral rows of application teeth and a central row of retention teeth and also a plurality of channels for conveying the product which open out between two adjacent rows.
REFERENCES:
patent: 3066683 (1962-12-01), Pace
patent: 3520311 (1970-07-01), Iesersek et al.
patent: 3960160 (1976-06-01), Hogan
patent: 4592376 (1986-06-01), Sigmund et al.
patent: 4867183 (1989-09-01), Busch et al.
patent: 5638608 (1997-06-01), Dorber
patent: 5803093 (1998-09-01), Romano
patent: 5909737 (1999-06-01), Ricco
patent: 879577 (1961-10-01), None
Cantor & Colburn LLP
Doan Robyn
Wilson John J.
LandOfFree
Device for applying a product to the hair, particularly a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for applying a product to the hair, particularly a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for applying a product to the hair, particularly a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2537759