Surgery – Instruments – Means for removal of skin or material therefrom
Patent
1999-03-24
2000-03-07
Hirsch, Paul J.
Surgery
Instruments
Means for removal of skin or material therefrom
A45D 2600
Patent
active
060334169
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a hand-held depilatory device intended to remove hair from the human body considered to be superfluous for aesthetic or other reasons.
PRIOR ART
A known family of depilatory devices is based on a roller rotating around a central axis disposed behind a window in one end of the casing, this roller comprising one or several rows of tweezers, each row being formed by a first series of side-by-side, parallel movable blades interposed with a second series of fixed disks or equally movable blades, a tweezer being constituted by a blade of the first series associated with the adjacent disk or blade of the second series. It is also provided with control means for successively bringing the blades to press against one another so as to grasp the hairs to be extracted, then separating them to allow the extracted hairs to be removed before the next hairs are inserted between the blades.
In order to be effective, a depilatory device must simultaneously comply with a plurality of constraints. First of all, the row of tweezers or two adjacent rows must be able to treat the entire area defined by the window. Secondly, the closure of the tweezers must occur as quickly as possible, at the precise moment at which they pass over the base of the hair at the level of the skin, especially when the grasping zone is not very large. Thirdly, the value of the grasping pressure must be set at a value that is neither too high, in which case the hair is merely cut, nor too low, in which case the hair slides through without being extracted. Fourth, the above-mentioned characteristics must exist simultaneously, and in homogeneous fashion, in each of the tweezers forming a row. Lastly, the control mechanism must be as simple as possible in order to be reliable over time and inexpensive.
A first type of depilatory device in this family, the so-called "pivoting blade" type, described in the document EP 328 426 (Demmester/Braun), comprises a rotary roller formed by a series of circular blades disposed side by side, each blade having two diametrically opposed protuberant grasping zones. These blades are mounted through a central opening onto the shaft of the roller so as to be pivotable on an axis perpendicular to this shaft. Two bars (or rods) slide-mounted parallel to and against the shaft comprise transverse slots, into each of which is inserted an edge of the central opening of a blade, these blades being alternately coupled with one of these bars and with the other. Each bar is driven by a cam in opposition to a small return spring so as to ensure, two times per turn of the roller, the simultaneous rotation of these blades, one in one direction and the next in an opposite direction so as to come into contact with one another like tweezers.
The device according to the document EP 403 315 (SEB) is similar except for the fact that the tweezers are each formed by a pivoting half-blade belonging to a first series in association with a fixed disk belonging to a second series, a single control bar being sufficient to actuate the tweezers of a row. Each half-blade is mounted so as to pivot around its own base held inside a slot of the hub, this pivoting being imparted by the slot of the bar engaged with the lower edge of the opening of the half-blade through which the bar passes.
In both of these devices, only two rows of tweezers per roller are normally provided, all the tweezers in a row being active simultaneously when they pass in front of the window of the casing.
Moreover, the correct return of the blades to the separated position is dependent on springs that must be rigid enough to drive all of the blades, which exerts a detrimental level of stress on the motor, but small enough to be housed discretely.
The first variant of a depilatory device described in the document FR 2 662 338 (Matsushita) comprises a roller composed of fixed disks and laterally movable blades. These disks and blades, having a square central opening, are alternately threaded onto a rotary central drive shaft, also of
REFERENCES:
patent: 4960422 (1990-10-01), Demeester
patent: 5041123 (1991-08-01), Oliveau et al.
patent: 5084055 (1992-01-01), Demeester
patent: 5196021 (1993-03-01), Kabla
patent: 5207689 (1993-05-01), Demeester
patent: 5281233 (1994-01-01), Dolev
patent: 5494485 (1996-02-01), Gabion et al.
patent: 5507753 (1996-04-01), Iwasaki et al.
patent: 5611804 (1997-03-01), Heintke
Beillard Bernard
Dolev Moshe
Louison Bernard
Rosson Yves
Hirsch Paul J.
Seb S.A.
LandOfFree
Depilatory device with rotary roller does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Depilatory device with rotary roller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Depilatory device with rotary roller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-358558