FIELD OF THE INVENTION

This invention is related to epilation devices.

BACKGROUND OFTHE INVENTION

Hair removal can be done by a variety of techniques and methods. One such method, called threading, originates from the ancient practice of hair removal by the use of thread that is first manually twisted and then manipulated at four points. Hereinafter "thread ^" includes thin wire, thin filament or any thread/wire like material. The twisted section of the thread is placed near the surface of the skin and is manipulated in such a way thai as it moves along a row of hair that is to be removed, the hair is grasped and pulled from the follicle.

However this method requires a certain amount of skill. Furthermore, it is time consuming, manually intensive and difficult to do by ones-self with precision. Thus threading usually requires the need for a second person trained in the art.

Recent attempts at self-threading apparatuses have been made however they suffer from being unwieldy and compromise precision.

SUMMARY OF THE INVENTION

The present inventors have recognized that the limitations of existing self- threading apparatuses are due to two things. First, the conventional use of four manipulation points and their method of manipulating the twisted thread to remove hair. Second, the lack of a guide and the corresponding inability to precisely determine what hair is to be removed.

^' I ^' he present inventors realized that a new method for threading by twisting thread using rotational motion at one point with the use of a guide would result in numerous benefits including a device that was less cumbersome and easier to use without compromising precision.

Through our research, we have discovered a new method for threading by use of a relational mechanism (hereinafter "rotational mechanism" is defined us a mechanism that conveys rotational motion) to twist and untwist thread by alternating rotational motion in opposite directions. With this, method, the tour conventional manipulation points are no longer required as the rotational mechanism allows threading to be achieved by using it as the only manipulation point. This method also allows for the utilization of one or more threads to be used as a guide by placing them along the twist axis where the hair removal occurs. Hereinafter, twist axis is defined as the axis created by the twisting of the threads by the rotational mechanism. This allows the self-threading apparatus to be smaller, more precise and less unwieldy than existing self-threading apparatuses. It minimizes the amount of manual labour and skills required in such u way that a person not skilled in the art can easily use this apparatus to thread with precision,

The rotational mechanism of this threading apparatus may comprise an electric motor to enhance ease and precision by eliminating the need to manipulate the rotational motion manually.

Certain embodiments, including the inventors preferred embodiment of this invention, may place the guide thread in a different plane than the other threads. I lereinafler. guide thread is defined as one or more threads that deviate least from the twist axis of the rotational mechanism and are used as a guide to isolate hair to be removed. This will permit the guide thread to precisely determine what hair is to be removed by allowing the threader to be held at an angle so that only one plane is placed next to lhe skin. This will become clearer in the ensuing description and drawings.

Some embodiments of this invention may include a magnifying mechanism iind/or a light to improve visibility and thus enhance precision. If desired, a cleaning brush to help remove dislodged hair left on the thread may also be included on particular embodiments of this invention.

Please note that each of these options provides particular advantages and can be implemented independently or in any combination of the others.

These and other features, as well as advantages of the invention over the prior art. will become apparent from a consideration of the ensuing description and drawings.

URIICF DESCRIPTION OFTHE DRAWINGS

FIG. I A & FIG. I B illustrate the conventional method of threading using tour manipulation points;

FIG 2A & HCL 2B arc diagrams illustrating the new method of threading by use of a bidirectional rotational mechanism and guide thread. 1''IG 3 A is a detailed diagram depicting the preferred embodiment of the present invention.

FIG 3 B depicts a sectional view of this embodiment illustrating the electric motor and power source.

NG. K is a diagram depicting the preferred embodiment of the threading apparatus with its arm folded when not in use.

FlG 4A and FIG. 4B are diagrams illustrating how this threading embodiment functions. FlCi. 4A depicts the default untwisted state of the embodiment. FKi. 4Ii depicts the maximally twisted state of the embodiment.

FIG 5A illustrates how the plane that is created by threads 702 and 704 can be used tor precise hair removal around the eyebrow using thread 704 as a guide. IOr clarity, thread 703 is purposely not depicted in the image.

I- Ki. 5B illustrates how the plane that is created by threads 703 and 704 can be used for precise hair removal around the eyebrow using said thread 704 as a guide. For clarity, thread 702 is purposely not depicted in the image.

FIG 6 depicts an embodiment with a tension control mechanism.

FIG 7 is an illustration of a particular embodiment which makes use of an elastic to relieve tension.

FIG 8 is an illustration of a particular embodiment which makes use of elastics on its arms To relieve tension.

FIG OA is an illustration of an embodiment that has no arms.

FKi. Wi is a diagram illustrating a particular embodiment of the present invention that has two arms.

DETAILED DESCRIPTION OFTIIE INVENTION

I lair removal by the conventional practice of threading uses thread that is manually twisted and then placed next to the surface of the skin. The twisted thread is then manipulated at four points in such a way that hair is grasped and pulled from the follicle. FIG IA and FIG I Q illustrate (his conventional method of threading (labels 1,2,3.4 depict the four manipulation points respectively). kxisting self-threading devices have recently been developed that follow this conventional method of hair removal. However, by following this method, these self- threading apparatuses are limited by the conventional placement of the four manipulation points that manipulate the manually twisted thread to remove hair. Thus these devices suffer from being unwieldy and dυ not provide the same precision as manual threading by a second person.

Other self-threadiπμ devices have recently been developed that use a rotational mechanism. However due to the absence of a guide, these devices also suffer from imprecision and do not provide the same precision as manual threading by a second person,

The present inventors realized that a new method for threading by twisting thread using rotational motion at one point and the use of u guide would result in numerous benefits including a device that was less cumbersome and easier to use without compromising precision.

Through our research, we have discovered, as depicted in FIG 2A and FIG 2B, thiii precise threading can be achieved by use of a rotational mechanism 802 that twists and untwists threads 902, 903 using bidirectional rotation in conjunction with a guide thread 901 that is placed along the twist axis T of the rotational mechanism 802. In FIG 2 A the rotation in direction f causes threads 902, 903 and guide thread 901 to twist whereas in FIB 2B the rotation in the opposite direction r causes threads 902, 903 and guide thread 901 to untwist. Please note that twisting and untwisting can occur in either direction and only one direction has been shown for illustration purposes. Using this method we have invented a threading apparatus that achieves hair removal without following the conventional method of four manipulation points but instead removes hair by use of only one manipulation point KOI and guide thread 901. Please also note that the guide may consist of more than one thread. Thus some embodiments may make use of more than a single guide thread.

FIG, 3 A and PIG. 3 B are diagrams of a self-threading apparatus (hereinafter referred to as "threader") embodying the principles of the present invention, The threuder comprises a body 100. A rotational mechanism 300, comprising an electric motor with power source 104. is substantially housed within body 100 and its trigger 103 tυ turn it on and off is attached outside. A switch 105 to adjust the speed of the threader is also located on body 100. One arm 201 comprising three protrusions 202, 203, 204 extends out from body 100. As depicted in FIG 3C, arm 201, can be folded into a storage position when not in use. One endpoint of thread 702 is fastened to manipulation point 301 located on relational mechanism 300. The other endpoint of thread 702 is fastened to connection point 402 located on arm protrusion 202. I lereinafler "connection point" is defined as a structural element on the arm that connects to the thread. Phase note that in reference to connection points, an arm protrusion Is considered part of the arm, and thus a connection point can be located on arm 201 or any of its protrusions. One endpoint of a second thread 703 is also fastened to manipulation point 301 while its other endpoint is fastened to connection point 403 located on arm protrusion 203. One endpoint of a third thread 704 is also fastened to manipulation point 301 while the other end point is fastened k> connection point 404 located on arm protrusion 204, As depicted in Fig 3A. arm protrusions 202. 203, 204 are angled in such a way that threads 704 and 702 Ibrm a different plane than threads 704 and 703,

In accordance with the invention, FIG 4A and I ¹ IG 4B illustrate how this embodiment (unctions. When trigger 103 is manipulated, rotational mechanism 300 will start to rotate in one direction causing threads 702. 703 and 704 to begin twisting, ϊiiis twisting will cause an increase in the tension of threads 702. 703 and 704, To relieve this tension, arm protrusions 201 , 202. 203 are made of flexible material so as to yield in proportion to the increasing tension in the threads,

The bidirectional rotation of rotational mechanism 300 is controlled electronically by which it will continue to rotate in one direction until the twisting of the threads as depicted in FIG 4B causes a predetermined tension threshold to be reached. The rotational mechanism 300 will ihcn begin to rotate in the opposite direction thereby untwisting threads 702, 703 and 704. As the threads 702. 703 and 704 untwist and the tension in the threads 702. 703, 704 decreases the threader will return to an untwisted state as depicted in FIG. 4A. At this point the process may be repeated as desired until the trigger is turned oil

When placed next to the skin, the twisting of threads 702, 703 and 704 will cause hair to be grasped and removed from its follicles while the untwisting of threads 702, 703 and 704 will cause the removed hair to be dislodged from threads 702. 703. and 704. Since the plane formed by threads 704 and 702 is different than the plane formed by threads 704 and 703; thread 704 can also be used as a guide in situations requiring greater precision such as eyebrows. As depicted in HKi 5A and KKi 5R, the two separate planes formed by the threads allow the threader to be held at an angle so that only one plane is placed next to the skin while the other is away from the skin. In this way the area of potential hair removal is constricted to only thai of the plane that is placed next to the skin; i.e.. cither the area between threads 704 and 702 or when angled the other way. the area between threads 704 and 703. In both cases, thread 704 delineates the boundary between where hair is removed and where hair is not. Thus thread 704 can be used as a guide to precisely determine what hair is to be removed by holding the threader at an angle so that only one plane (bounded by thread 704) is placed next to the skin.

IOr added precision and visibility, a light 701 is connected to body 100.

Other Embodiments

The inventors are awure that this method for hair removal may be achieved using other embodiments of the present invention.

Some embodiments may include a tension adjustment mechanism. This would allow the ability to fine tune the tension in the thread. A particular embodiment containing u tension adjustment mechanism is depicted in FIG 6 and is similar to the inventors' embodiment. Though connected to manipulation point 301, threads 702, 703 and 704 are not fastened to connection points 402, 403. and 404, Instead, in this embodiment, the endpoints of threads 702. 703 and 704 are guided through connection points 402. 403. and 404 respectively and then fastened to adjustment mechanism 601 located on arm 201. Adjustment mechanism 601 may be manipulated to increase or decrease the tension in the threads as desired. The inventors are aware that there arc various methods to achieve tension control. For example instead of only one adjustment mechanism, there could be three, allowing the ability to control tension in each thread separately. Alternatively, the inventors also appreciate that in some embodiments connection point 301 may be connected to an adjustment mechanism that allows for the ability to adjust the tension in threads 702, 703 and 704 when desired.

The inventors are also aware that in addition to the ability to adjust tension, there arc many alternative methods lor removing tension in the threads. Two examples depicted in I K i. 7 and FIG 8. utili/e different methods to remove tension. These embodiments arc similar to the inventors preferred embodiment however utilize elastics to relieve tension. Hereinafter clastic(s) is defined as any material that has the property of elasticity and is used as a biasing means, including but not limited to springs, elastic cords, rubber bands.

The embodiment depicted in FIG 7 utilizes an clastic 501 as a manipulation point that is connected to rotational mechanism 300. In this embodiment, one endpoint of thread 702 is fastened to elastic 501 which is connected to rotational mechanism 300. The other endpoint of thread 702 is fastened to connection point 402 located on arm protrusion 202. One endpoint of a second thread 703 is also fastened to clastic 501 while its other σidpυini is fastened to connection point 403 located on arm protrusion 203. One endpoint ol ^' u third thread 704 is also fastened to elastic 501 while (he other end point is fastened to connection poinl 404 located on arm protrusion 204. Similarly to the inventors preferred embodiment, when trigger 103 is manipulated, rotational mechanism 300 will start to rotate in one direction causing threads 702, 703 and 704 to begin to twist. This twisting will cause an increase in the tension of threads 702, 703 and 704. However, unlike the preferred embodiment to relieve this tension, elastic 501 will yield in proportion to the increasing tension.

The embodiment depicted in FIC. 8 is similar however it utilizes elastics placed on arm protrusions 203, 204, 205 instead of one elastic on rotational mechanism 300. In this embodiment, one endpoint of thread 702 is fastened to manipulation point 301 on rotational mechanism 300 while ils other endpoint is guided through connection point 402 then fastened to connection point 302 located on arm protrusion 202. One endpoint oi a second thread 703 is also fastened to manipulation point 301 on rotational mechanism 300 while its other endpoint is guided through connection point 403 then fastened to connection point 303 located on arm protrusion 203. One endpoint of a third thread 704 is also fastened to manipulation point 301 while the other end point is guided through connection point 404 and then fastened to connection point 304 located on arm protrusion 204. I. ike the preferred embodiment, protrusions 202, 203, 204 are angled in such a way that threads 704 and 702 form a different plane than threads 704 and 703. When trigger 103 is manipulated, rotational mechanism 300 will begin to rotate in one direction causing threads 702. 703 and 704 attached to manipulation point 301 to begin twisting. This twisting will cause an increase in the tension of threads 702. 703 and 704. To relieve this tension, connection points 302, 303 and 304 arc respectively connected to elastics 502. 503 and 504 that yield in proportion to the increasing tension. Though not required, in this embodiment two adjustment mechanisms have also been included. Elastics 502 and 503 ore connected to an adjustment mechanism 601 that allows for the ability to adjust the tension in elastics 502 and 503. Klastic 504 is connected to an adjust men t mechanism 602 that allows for the ability to adjust the tension in elastic 504.

The inventors realize that a predetermined tension threshold is not the only way to determine when the change in direction of rotation of rotational mechanism 300 occurs and other embodiments may use different criteria. For instance, other embodiments could achieve change in direction of rotation of rotational mechanism 300 by use a predetermined duration of time, a predetermined number of rotations, or any combination of the above. For cNamplc b> use of a predetermined number of rotations, rotational mechanism 300 will rotate « number of rotations in one direction until the twisted state depicted in FIG 4A is reached and then rotate a number of rotations in the opposite direction until the untwisted stated depicted in FICi 4B is reached. For further illustration, this can be described mathematically as follows:

Let D be the default untwisted state of the apparatus;

Let T be the twisted state of the apparatus;

Let Ru be the number of rotations of the rotational mechanism 300 in direction a;

I /Ct Rh be the number of rotations of the rotational mechanism 300 in the opposite direction b.

Let x by the number of rotations required to reach '/'

Then at default untwisted state D (threads 702, 703 and 704 untwisted),

Ra=Rb=(K And at the twisted state T (threads 702,703, and 704 twisted),

Ra=X and RfMt.

When T is reached rotational mechanism 300 will begin to rotate in the opposite direction thus untwisting the twisted threads 702. 703 and 704. The inventors have discovered the ideal rotational scheme Io be one in which rotational mechanism 300 rotates an equal number of times x in direction b from the twisted slate 7".

Thus JWHr until default state D (threads 702. 703, 704 untwisted) is again reached.

Thus there may be a number of different methods to determine when the change of direction of rotation of rotational mechanism 300 occurs.

I he inventors appreciate that in some embodiments arm 201 may slide into position or it and its protrusion^ may fold together in different ways, l here are many different ways that it may be put into it storage position, Alternatively arm 201 may be in o fixed position to the body.

Other embodiments of the present invention may have no arms as depicted in FlG 9A. or two arms and/or arm protrusions as depicted in FKl 90. It is also possible that particular embodiments of the present invention may comprise a plurality of arms and/υr arm protrusions greater than 3

Ii must also be noted that in some embodiments, a guide thread may minimally be achieved by the use of only two threads. This is done by holding one thread more firmly than the other thread. As the rotational mechanism begins twisting the threads, the firmly held thread will direct the iwisi axis closer to it than the less firmly held thread and enabling the more firmly held thread to be used as a guide thread.

The inventors also appreciate that in other embodiments of the invention, rotational mechanism 300 need not be fully enclosed within body 100. It may be partially enclosed within body 100 or totally outside. Similarly, trigger mechanism 103 need not be attached to the outside of body 100. Other embodiments may have trigger mechanism 103 attached to other parts of the apparatus such as arm 201 while some embodiments may have it totally separate from the apparatus altogether.

I hough the preferred embodiment tor the present invention makes use of a microchip to control the bidirectional rotation in rotational mechanism 300, the inventors appreciate that other embodiments may make use of manual, mechanical, electrical or any other means to control the bidirectional rotation. There may be also other electronic ways other than a microchip 1o control the bidirectional rotation. More over, in other embodiments of the present invention, rotational mechanism 300 may be manually, and/or mechanically powered or powered by other sources.

Though the preferred embodiment of the present invenlion uses three threads the inventors are aware that particular embodiments of the present may use a single thread. Thus, hereinafter. "Plurality of threads" is defined as multiple threads or two loose ends of a single length of thread."

Other embodiments of this invention may include a magnifying mechanism to improve visibility and thus enhance precision. If desired, a cleaning brush to help remove dislodged hair left on the thread may also be included on particular embodiments of this invention.

Please note that each of these options and embodiments provides particular advantages and may be implemented independently or in combination of the others.

The fore going merely illustrates the principles of the invention. It is thus appreciated that others skilled in the art will be able to devise numerous other arrangements that while not shown and/or described herein, embody the principles of the invention and thus arc within its spirit and scope.