U.S. patent number 3,624,749 [Application Number 05/081,269] was granted by the patent office on 1971-11-30 for hair curlers.
This patent grant is currently assigned to American Velcro Inc.. Invention is credited to Laurent H. Girard, William A. Ribich.
United States Patent |
3,624,749 |
Girard , et al. |
November 30, 1971 |
HAIR CURLERS
Abstract
A hair curler is disclosed having a cylindrical body member and
a plurality of hair-gripping elements projecting from the outer
surface of the body member. Each hair-gripping element includes
generally two outer arms and an inner loop disposed in spaced
relation to each other and between which loops strands of hair are
held in a wound condition about the curler.
Inventors: |
Girard; Laurent H. (Bedford,
NH), Ribich; William A. (Lexington, MA) |
Assignee: |
American Velcro Inc.
(Manchester, NH)
|
Family
ID: |
22163123 |
Appl.
No.: |
05/081,269 |
Filed: |
October 16, 1970 |
Current U.S.
Class: |
132/262 |
Current CPC
Class: |
A45D
2/2478 (20130101) |
Current International
Class: |
A45D
2/00 (20060101); A45D 2/24 (20060101); A45d
002/00 () |
Field of
Search: |
;132/40,38-39,41,43 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Kinsey; Russell R.
Assistant Examiner: McNeill; Gregory E.
Claims
I claim:
1. In a hair curler having a cylindrical body member and a
plurality of hair-gripping elements projecting from the outer
surface of the body member for holding strands of hair in a wound
condition about the curler, the improvement wherein each
hair-gripping element comprises:
a. Outer arms and an inner loop disposed generally within the outer
arms in spaced relation thereto to thereby define a space between
the inner loop and said outer arms through which said strands
extend, said outer arms being separated at their terminal ends by a
gap facilitating entry of strands of hair into the space defined
between the inner loop and outer arms.
2. The improvement according to claim 1 wherein the outer arms and
the inner loop are made of a flexible resilient material.
3. The improvement according to claim 2 wherein the outer arms and
the inner loop are made of a plastic material.
4. The improvement according to claim 3 wherein the outer arms and
inner loop upstand from and are formed integral with a flexible
base sheet of plastic material.
5. The improvement according to claim 1 wherein said gap between
said outer arms is located directly above the crest of the inner
loop.
6. The improvement according to claim 5 wherein each curved arm has
a cubic curvature.
7. The improvement according to claim 6 wherein each arm has a
generally trapezoidal cross-sectional configuration.
8. The improvement according to claim 7 wherein the inner loop has
a generally triangular cross-sectional configuration.
Description
BACKGROUND OF THE INVENTION
Hair curlers commonly in use generally include a cylindrical body
member about which strands of hair are adapted to be wound and a
means for holding the hair in a woundup condition about the body
member until the proper set has been imparted to the hair.
In several known constructions, the means for holding the hair in a
woundup condition comprises a plurality of hair-gripping elements
projecting radially outward from the outer surface of the body
member. In the constructions referred to, these hair-gripping
elements are commonly defined by the pile threads of a synthetic
woven pile material which is suitably secured to the outer surface
of the body member. The raised pile threads defining the
hair-gripping elements are shaped to engage and hook the strands of
hair as they are wound about the curler. As one example, the raised
pile threads may have the shape of a classical J-hook. As another
example, raised pile threads having ball or spherical-shaped
terminal portions have been used for the purpose of hooking strands
of hair wound about the curler thereby retaining them in place. And
as a further example, each gripping element includes a pair of
raised pile threads each of which has a medially bowed partial
elliptical shape for hooking the wound strands of hair.
Hair curlers of the type described above are quite convenient to
use as the hair is automatically locked in place about the curler
as it is being wound, and, once wound about the curler, the curler
itself may be held in place simply by lightly pressing the hair
carrying curler against the scalp. This causes the hair-gripping
elements to hook onto loose strands of hair not wound about the
curler or the root portions of wound hair thereby retaining the
curler and hair wound thereabout firmly in place.
Hair curlers of this type, however, possess one serious drawback
which has limited their widespread use. This drawback relates to
the unwinding of the hair from the curler. As the hair is unwound
there is a tendency for the individual strands to become snarled or
tangle or catch on the hooklike hair-gripping elements thus
causing, in many cases, at least partial loss of hair set or a
kinky curl as well as discomfort to the user.
The present invention provides a hair curler of the general type
described above in which the hair-gripping elements are specially
constructed to release the hair upon unwinding without snarling or
tangling or catching on the hair-gripping elements.
SUMMARY OF THE INVENTION
In accordance with the teachings of the present invention, an
improvement in hair-gripping elements for a hair curler of the type
which is equipped with a plurality of individual hair-gripping
elements projecting from the outer surface of a cylindrical body
member is provided. In construction, the improved hair-gripping
elements each include a pair of curved arms the terminal ends of
which are spaced apart by a gap. The improved hair-gripping element
further includes an inner loop which is positioned generally within
the outer arms in spaced relation thereto.
With this arrangement strands of hair extend longitudinally through
the space defined between the spaced outer arms and inner loops in
an entrapped condition such that the strands of hair are held in a
wound condition about the curler. The gap between the terminal ends
of the outer arms facilitates entry of the hair strands into the
space between the outer arms and the inner loops as the hair
strands are wound about the curler. The wound strands of hair are
smoothly and conveniently unwound simply by rotationally pulling
the curler away from the head of the user thus causing the
entrapped wound strands to slide longitudinally out of their place
of entrapment between the inner loops and outer arms.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the hair curler of this
invention.
FIG. 2 is a perspective view of the molded plastic sheet which
carries the improved hair-gripping elements of the hair curler of
this invention.
FIG. 3 is a side elevation view of one of the hair-gripping
elements taken along the lines 3--3 of FIG. 2.
FIG. 3a is a cross-sectional view taken along the lines 3a--3a of
FIG. 3.
FIG. 3b is a cross-sectional view taken along the lines 3b--3b of
FIG. 3.
DETAILED DESCRIPTION OF THE DRAWINGS
As shown in FIGS. 1 and 2, the hair curler of the present invention
includes a cylindrical body member 4 which is formed from the
molded plastic sheet 5 shown in FIG. 2. The molded plastic sheet in
strip form is wrapped spirally to form the cylindrical body member
and the edges of the sheet are secured by any suitable means, such
as by adhesively affixing or ultrasonically welding the edges
together. The sheet 5 includes a flexible base sheet 6 and a
plurality of flexible resilient hair-gripping elements 7 upstanding
from one surface of the base sheet 6. In the presently preferred
embodiment of the invention, the base sheet 6 and hair-gripping
elements 7 are made of plastic material molded as an integral unit.
A suitable molding apparatus and method which can be utilized to
produce the molded plastic sheet 5 is described in copending and
commonly assigned U.S. Pat. application Ser. No. 824,597 entitled
"Production of a Continuous Molded Plastic Strip" and filed May 14,
1969.
The structure of the improved hair-gripping elements is shown most
clearly in FIG. 3, 3a and 3b wherein it will be seen that each
hair-gripping element comprises generally two outer arm sections
having a generally trapezoidal cross-sectional configuration which
is indicated generally by reference number 11 and an inner loop
section 9 having a generally triangular cross-sectional
configuration and situated generally within the outer arms section
11 in spaced relationship thereto. As shown, the outer arms 11 are
spaced apart at their free terminal ends 12 by gap 13. The gap 13
facilitates entry of the hair strands, as for example strands 15
indicated by dash-dot lines in FIG. 3, into the space 16 between
the inner loop and the outer arms 11 respectively as these strands
are wound about the curler body. The width of the gap 13 should be
small enough so that the space 16 is a substantially closed one but
large enough to permit substantially free access of a cluster or
bunch of hair strands into space 16 at one time. In the
construction shown, the gap 13 is located directly above the crest
14 of the inner loop 9 and each arm 11 has a cubic curvature. The
terminal ends 12 are rounded as shown so that the passage of hair
strands 15 into the space 16 between the inner loop and the outer
arms is not impeded.
As hair is wound about the curler, the individual strands 15 are
received into the space 16 between the inner loop 9 and outer arms
11 through gap 13 between terminal ends 12 of arms 11. Some strands
may also enter the space 16 sideways through the space 16 in a
looping fashion over the inner loop 9; but most will enter through
the gap 13 if it is properly dimensioned as above described. Thus,
as shown in FIG. 3, hair strands may extend through the space 16 on
only one side of the inner loop 9, as for example hair strand 15',
or they may extend through the space 16 on one side of the inner
loop 9 around the inner loop 9 and then through the space 16 on the
other side of the inner loop, as for example strand 15". As the
hair strands accumulate in the space 16 during winding, the arms 11
flex slightly outward with respect to the inner loop 9 to
accommodate the strands; and as the arms are resilient, the back
pressure created by the tendency of the arms to return to their
initial position, causes the strands of hair to become entrapped in
the space 16.
After winding, the curler may be secured firmly in place on the
head of the user simply by pressing it lightly into the scalp. This
will cause the terminal ends 12 of arms 11 to engage and hook onto
the wound-up strands of hair near their roots or any loose unwound
strands thereby holding the curler and hair wound thereon in
place.
Unwinding of the hair from the curler is accomplished simply by
grasping the ends of the curler body with one's fingers and pulling
the curler rotationally away from the head. This movement causes
the entrapped strands of hair to slide longitudinally out of the
space 16 between the inner loops and outer arms of the hair
gripping elements.
With the hair curler construction described above, the hair is
released smoothly and without noticeably pulling of the hair
strands which might cause discomfort to the user. This is due to
the fact that the individual strands of hair are entrapped and
confined by the hair-gripping elements of the present invention
rather than being hooked by or catching on the hair-gripping
elements as is the case with the hair-gripping elements of prior
art hair curlers of the general type disclosed herein.
The entrapment of the strands by the hair curlers of the present
invention renders them extremely convenient to use and comfortable
during both application and removal. It also increases the
probability of obtaining a good hair set as the avoidance of any
snagging or catching during use substantially eliminates the danger
of resulting kinky or ragged curls. Additionally, the hair-gripping
elements, hold the hair firmly on the hair curler, thereby
preventing slipping as the hair is initially wound about the
curler.
In addition to the above advantages, the hair curler of this
invention is simple in construction, durable, and inexpensive to
manufacture all of which enhances its overall utility.
* * * * *