U.S. patent application number 10/586751 was filed with the patent office on 2008-09-18 for hair extension.
Invention is credited to Stephen Brown.
Application Number | 20080223390 10/586751 |
Document ID | / |
Family ID | 31971300 |
Filed Date | 2008-09-18 |
United States Patent
Application |
20080223390 |
Kind Code |
A1 |
Brown; Stephen |
September 18, 2008 |
Hair Extension
Abstract
A hair extension method and application tool (10) bond a
hair-piece, such as a hair braid (4), to an existing lock of hair
(22) using an electro-magnetically curable adhesive which may be
cured substantially athermally.
Inventors: |
Brown; Stephen;
(Worcestershire, GB) |
Correspondence
Address: |
YOUNG & THOMPSON
209 Madison Street, Suite 500
ALEXANDRIA
VA
22314
US
|
Family ID: |
31971300 |
Appl. No.: |
10/586751 |
Filed: |
January 24, 2005 |
PCT Filed: |
January 24, 2005 |
PCT NO: |
PCT/GB05/00246 |
371 Date: |
August 21, 2006 |
Current U.S.
Class: |
132/201 ;
132/53 |
Current CPC
Class: |
A41G 5/0086 20130101;
A41G 5/0046 20130101; A41G 5/008 20130101 |
Class at
Publication: |
132/201 ;
132/53 |
International
Class: |
A41G 5/00 20060101
A41G005/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 23, 2004 |
GB |
0401423.9 |
Claims
1. A method of joining a hairpiece to a lock of hair to provide a
hair extension, which method comprises bonding said hairpiece to
said lock using an adhesive that is curable by exposure to
electromagnetic radiation.
2. A method according to claim 1, in which the steps of bringing
together the adjacent regions of the hairpiece and the lock to be
joined in contact with an amount of electromagnetically curable
adhesive, and exposing said adhesive to electromagnetic radiation
to cure said adhesive.
3. A method according to claim 2, wherein said adhesive is
pre-applied to an end region of said hairpiece.
4. A method according to claim 1, which includes the step of
clamping adjacent regions of said hairpiece and said lock in a tool
and exposing said adhesive to electromagnetic radiation to cure
it.
5. A method according to claim 1, wherein said adhesive is cured
using a process which does not require a significant input of
thermal energy.
6. A method according to claim 5, where said adhesive is a UV
curable adhesive.
7. A tool for the attachment of a hairpiece to a lock of hair using
an adhesive curable by exposure to electromagnetic radiation, said
tool comprising clamp means for clamping together in use, in
abutting or overlapping fashion adjacent end regions of the lock of
hair and the hairpiece, and means for directing electromagnetic
radiation at said abutting or overlapping region.
8. A tool according to claim 7, when said tool includes two jaw
members mounted for relative hinging movement.
9. A tool according to claim 8, wherein at least one of the facing
surfaces of the jaw members includes a groove or profiled guide
region for isolating a lock of hair.
10. A tool according to claim 8, including a switch for actuating a
source of electromagnetic radiation, said switch being disposed to
be closed when said jaw members are hinged towards each other.
11. A hairpiece having an amount of electromagnetically curable
adhesive material provided on a bonding region thereof.
12. A kit comprising at least one hairpiece as claimed in claim 11,
in combination with a tool as claimed-in claim 7.
13. A method according to claim 2, which includes the step of
clamping adjacent regions of said hairpiece and said lock in a tool
and exposing said adhesive to electromagnetic radiation to cure
it.
14. A method according to claim 3, which includes the step of
clamping adjacent regions of said hairpiece and said lock in a tool
and exposing said adhesive to electromagnetic radiation to cure
it.
15. A tool according to claim 9, including a switch for actuating a
source of electromagnetic radiation, said switch being disposed to
be closed when said jaw members are hinged towards each other.
Description
[0001] This invention relates to a method of joining a hairpiece to
a lock of hair to provide a hair extension, to a hairpiece for use
in such a method, to a tool for use in such a method, and to an
associated kit.
[0002] In this specification, the phase `lock of hair` is used to
mean one or more strands of hair; the term `hairpiece` is used
broadly to include any natural or synthetic strand or strands that
may be attached adjacent the end of a person's natural hair to
provide a hair extension. The hairpiece may comprise straight,
curled, braided or unbraided fibres. References to an adhesive
being curable by exposure to electromagnetic radiation, and
references to UV curable radiation are used to mean that the
adhesive is caused to change from a tacky liquid or semi-liquid
bondable state in which it may temporarily bond to a surface, to a
cured state in which the adhesive effectively bonds permanently
(save for intended removal). In this context `curing` is intended
to mean initiation of a series of steps that result in full curing
of the adhesive as well as effecting full curing directly.
BACKGROUND
[0003] It is already known to add loose hair extensions by gluing
individual sections of hair (human or synthetic) into a person's
own. However, this process requires experience with hair extensions
and a certain degree of skill to obtain satisfactory results. The
whole process is lengthy and generally quite expensive when done by
a professional in a salon.
[0004] Incorrect application of an adhesive can stick to the wrong
sections of hair or worse burn parts of the scalp resulting in
dissatisfaction and pain. Furthermore, the current methods used for
extensions require an adhesive that is typically very difficult to
remove and the whole process can lead to significant damage to a
person's own hair.
[0005] The basic technique is to take a small section of loose
hair, dip the end of the section into an adhesive, then roll this
around a small section of the person's own hair at the root until
the adhesive cures. This requires considerable skill and
dexterity.
[0006] Adhesives consist of long chain polymers. These bond to the
surface to be adhered and give rise to the required adhesion.
Conventional adhesive materials bond by a thermal processes such as
hot air, infrared IR or near infrared (NIR). The coated material is
heated using a considerable amount of energy; the mass heats up,
allowing solvents and water to evaporate. Various conventional
adhesives are currently used for hair extensions, along with other
bonding methods such as `hot-melt`, a heated plastic that cools to
create a cohesive seal. All of these adhesives are difficult to
apply, remove and have the high possibility of causing damage to
the hair and pain to the user.
[0007] Examples of thermal processes which require the application
of heat are described in U.S. Pat. No. 6,510,856, European Patent
876773, European Patent 0650672B and U.S. Pat. No. 6,247,236. An
alternative approach is suggested in U.S. Pat. No. 6,405,736 which
describes a removable self adhesive hair extension in which the
hair fibres are secured to a self adhesive strip which is removably
applied to the scalp or the back of the head of the user.
[0008] Our research has shown that there is a need for a method of
applying hair extensions which may easily be applied in the home
without requiring professional help at the salon and which provide
pleasing results without the use of significantly elevated
temperatures.
[0009] Accordingly, in one aspect, this invention provides a method
of joining a hairpiece to a lock of hair to provide a hair
extension, which method comprises bonding said hairpiece to said
lock using an adhesive that is curable by exposure to
electromagnetic radiation.
[0010] The illustrated examples make use of bonding processes which
do not require the external application of significant amounts of
heat, and so the processes are essentially non-thermal. The
adhesives used in the embodiments of this invention achieve bonding
through use of electromagnetic energy.
[0011] Although the adhesive may be applied to the lock and/or the
hairpiece at the point of use, it is preferred for the adhesive to
be precoated or otherwise pre-applied to a bonding region adjacent
an end of said hairpiece.
[0012] It is preferred for the adhesive to be a UV curable
adhesive. It is already known to use UV adhesives for bonding and
filling processes such as, for example, for filling teeth in
dentistry and for attaching false or replacement nails in cosmetic
applications. Such adhesives are available in the form of acrylics
or gels and may be used, suitably modified if necessary, in the
present invention.
[0013] UV and electromagnetic curing is a process by which monomers
undergo curing (i.e. polymerisation or cross-linking) upon exposure
to the radiation. This is a `cold` photochemical reaction in which
molecules known as `photo-initiators` absorb the high energy
electromagnetic rays and breakdown to various components which in
turn activate reactive molecules in the adhesive agent. In this
way, the electromagnetic energy creates a strong 3-dimensional
network of polymers as it cures. A further advantage arising from
the use of electromagnetically curable adhesives is that, compared
to adhesives which require evaporation of water and solvents,
curing occurs throughout the substance and occurs at a much faster
rate which means that an effective bond can be achieved in a much
shorter period. This means that the hair extensions may be applied
without professional help.
[0014] Whilst the method may be carried out in any suitable manner,
in a particularly preferred embodiment, the method includes
applying a tool to clamp the lock of hair and the hairpiece, the
tool also having a source of electromagnetic radiation therein
operable to irradiate said adhesive. The tool also may perform the
function of isolating the lock of hair to be extended, so that the
extension does not bond inadvertently to other locks.
[0015] The invention also extends to a tool for use in the above
method, the tool comprising first and second members movable in
respect to each other between an open position and a clamping
position in which, in use, they may clamp in abutting or
overlapping relationship an end region of the hairpiece and an end
region of said lock of hair, said tool further including a source
of electromagnetic radiation operable in the use to irradiate the
abutting or overlapping regions to effect curing of an adhesive
located in said abutting region.
[0016] The tool may take many forms but in one embodiment the first
and second members are pivoted together at one end to form a
hingable jaw in which the lock of hair and the hairpiece may be
clamped in abutting or overlapping relationship.
[0017] Preferably, said tool includes switch means for switching on
said source of electromagnetic radiation, said switch means may
advantageously be disposed so as to switch on when said first and
second members are moved to or towards the clamping position.
[0018] The invention also extends to a hairpiece having provided in
a bonding region thereon an adhesive curable by electromagnetic
radiation.
[0019] The invention also extends to a hair extension kit
comprising one or more hairpieces and a tool each as described
above.
[0020] Whilst the invention has been described above, it extends to
any inventive combination of the features set out above or in the
following description.
[0021] The invention may be formed in various ways, and an
embodiment thereof will now be described in detail reference being
made to the accompanying drawings in which:--
[0022] FIG. 1 is a general perspective view of a hair extension
clamp tool in accordance with this invention;
[0023] FIG. 2 is a detailed view on the end of the hair extension
clamp tool of FIG. 1, and
[0024] FIG. 3 is a schematic sectional view through the hair
extension clamp tool of FIGS. 1 and 2.
EXAMPLE 1
[0025] A braid 4 made of synthetic hair was coated at one end 6
with a curable UV adhesive to provide a pre-glued braid ending.
Referring to the Figures, a hair extension clamp tool 10 comprises
first and second jaw members pivoted together at a hinge region 16
for movement between the relatively open position shown in FIG. 1
and the clamped positions shown in FIGS. 2 and 3. In the open
position of FIG. 1 the braid 4 may be slotted through the hinge
region but, when the jaws are clamped together the hinge clamps the
braid against longitudinal movement. The jaw members 12, 14 are
normally urged towards the open position shown in FIG. 1 by means
of a spring bias (not shown). The jaw members 12, 14 may be formed
with a groove partially to receive the braid and a lock of hair.
One of the jaw members 12 has an electromagnetic radiation source
18, here a UV light source in the form of a LED which receives
power from a power supply (not shown). The power supply is switched
by means of a microswitch 20 which closes the circuit turning the
LED on, when the jaws are closed to the clamping position.
[0026] In use, the user positions a pre-glued braid 4 in the tool
10 in the position shown in FIG. 1, with the pre-glued region 6
positioned towards the front of the jaws. The user then selects a
lock of hair 22 from their head which they wish to extend. The lock
22 is typically of approximately the same diameter as that of the
braid, and is fed into the open end of the jaws to the position
shown in FIG. 1, where it overlaps the pre-glued braid ending 6.
The pre-glued portion is preferably tacky so that it forms an
initial tacky bond with the hair. The user then closes the jaws 12,
14 to clamp the hair to the braid and to apply pressure thereon,
with the closure of the jaws causing the LED 18 to direct radiation
towards the pre-glued braid ending. This initiates curing of the
adhesive thus bonding the braid to the lock of hair.
[0027] In a preferred embodiment, the adhesive reacts to
electromagnetic radiation in the UV spectrum provided by a UV
source such as a UV frequency-specific LED or lamp. However, it
will be appreciated that different chemical compositions may
require electromagnetic radiation outside the UV spectrum, and the
method is not limited to UV-curable adhesives.
[0028] In the above embodiment, the adhesive is pre-coated onto the
extension or braid that is to be added, and only becomes reactive
on application of electromagnetic energy of a particular threshold
of intensity. This intensity can vary depending on the exact nature
of the chemical composition of a particular adhesive although it is
preferred for the threshold to be substantially higher than
standard daylight to avoid inadvertent activation thereof. It
should be noted that the adhesive does not need to be pre-coated
and could be applied directly to the site to be bonded, at the time
of application.
[0029] Although in the above embodiment the UV source is activated
automatically when the jaws of the clamp are brought together in
the closed position, in other instances the UV source could be
controlled manually, by a separate switch or button.
[0030] In the above embodiment a single LED is shown which points
directly at the region of overlap between the pre-glued braid
ending and the end of the user's hair. In other arrangements, where
the hair extension is complex or overly large, the UV light may be
differently angled and/or provided by two or more LEDs. For
example, for a larger braid, light may be directed radially to the
bundle. In addition, the UV source could be separate, or separable
from the clamp member to allow adjustment of the angle of
irradiation.
* * * * *