U.S. patent number 3,728,875 [Application Number 05/104,699] was granted by the patent office on 1973-04-24 for stocking with soft inner thigh area.
This patent grant is currently assigned to The Kendall Company. Invention is credited to Edward G. Hartigan, Herbert Knohl, Donald Patience.
United States Patent |
3,728,875 |
Hartigan , et al. |
April 24, 1973 |
STOCKING WITH SOFT INNER THIGH AREA
Abstract
A full length stocking of knitted fabric including an
elastomer-containing yarn which exerts a compressive effect on that
portion of the leg covered by the stocking boot. In contrast to a
typical stocking of this type which has an attached garter band of
elastic webbing encircling the upper thigh, a stocking is disclosed
in which that portion of the garter band which covers the plexus of
deep and superficial blood vessels in the inner thigh is replaced
with a soft fabric such as that in the stocking boot.
Inventors: |
Hartigan; Edward G.
(Schaumburg, IL), Patience; Donald (Barrington, IL),
Knohl; Herbert (Seneca, SC) |
Assignee: |
The Kendall Company (Walpole,
MA)
|
Family
ID: |
22301896 |
Appl.
No.: |
05/104,699 |
Filed: |
January 7, 1971 |
Current U.S.
Class: |
66/172E;
66/178A |
Current CPC
Class: |
D04B
1/265 (20130101); D04B 1/18 (20130101); D10B
2401/041 (20130101); D10B 2509/028 (20130101) |
Current International
Class: |
D04B
1/22 (20060101); D04B 1/26 (20060101); D04b
009/52 (); D04b 009/54 () |
Field of
Search: |
;66/172R,172E,173,183,178A,178R,192,193 ;2/226,240,241
;128/519,524,525,530,539,165 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
1,516,865 |
|
Feb 1968 |
|
FR |
|
1,524,594 |
|
Apr 1968 |
|
FR |
|
227,970 |
|
Jan 1925 |
|
GB |
|
541,854 |
|
Dec 1941 |
|
GB |
|
Primary Examiner: Reynolds; Wm. Carter
Claims
We claim:
1. A full length stocking having a circumferentially elastic boot
portion including elastomeric filament containing elastic yarn, a
narrow elastic band formed of non-slip elastomeric webbing material
attached to the top of said stocking extending around a major
portion only of the circumference of said top, the ends of said
band being separated by an area of soft conformable
circumferentially elastic fabric which extends from the top of the
stocking downwardly for a substantial distance below the band for
covering the plexus of deep and superficial blood vessels in the
upper inner thigh of a wearer.
2. The stocking of claim 1 wherein the area separating the band of
elastic webbing is in the form of a wedge shaped insert sewn into a
downward slit in the stocking thigh portion.
3. The stocking of claim 2 wherein the insert is of doubled
fabric.
4. The stocking of claim 1 wherein the elastic fabric area
separating the ends of the band of elastic webbing is of jersey
stitches of non-elastomeric yarn with elastomeric filament
containing yarn inlaid in the jersey stitches.
5. The stocking of claim 4 wherein the boot fabric is of courses of
knitted jersey stitches of non-elastomeric yarn into some of which
elastomeric filament containing yarn is inlaid.
6. The stocking of claim 4 wherein the boot fabric comprises
courses of jersey knit stitches of non-elastomeric yarn alternating
with courses of jersey knit stitches of covered elastomeric yarn
alternating with floats thereof, next adjacent courses of
elastomeric yarn having the floats thereof across different wales
of said fabric.
Description
BACKGROUND OF THE INVENTION
Full length therapeutic stockings and so-called tired-leg stockings
of the type including elastomer-containing yarns which exert a
compressive effect on the leg portion covered by the stocking boot
are well known. They have been constructed extending in lengths
ranging from midthigh to the gluteal furrow in a great many
constructions from a great variety of elastic fabrics. They have,
for instance, been made from powernet fabric, such as is described
in U.S. Pat. No. 2,960,855, for example, cut to shapes resembling
when relaxed the blanks of full-fashioned non-elastomeric
stockings, being somewhat narrowed from such blanks. These powernet
blanks and similarly shaped knitted full-fashioned stocking blanks
incorporating elastomeric yarns either in the knitted stitches or
inlaid in non-elastomeric yarn stitches are generally seamed up the
back with various loop, flatlock or overedge stitches to form
finished stockings. Circular knit stockings of non-elastomeric yarn
jersey stitches with elastomer yarn inlaid therein are disclosed in
the Herbert Knohl U.S. Pat. No. RE 25,046 originally issued Dec. 6,
1960. Other circular knit constructions including jersey knit
courses of elastomer-containing yarn alone and in combination with
one or more course rounds of jersey stitches of non-elastomeric
yarn are also well known, as are those with courses of jersey
stitches and floats of elastomer-containing yarn alternating with
jersey stitches of non-elastomeric yarn. Run-resistant elastic
fabric stockings have also been proposed.
With regard to the compressive range of stockings presently
marketed, the degree of compression exerted has been over a
relatively large range. It is generally understood, however, that
in a properly fitted stocking the pressure should be greater at the
ankle than at the stocking top whether the stocking be possessed of
the relatively reduced compression typical of therapeutic stockings
used in hospitals for the prophylactic treatment of the
thromboembolic disease or of so-called tired-leg stockings or of
the relatively higher compression typical of stockings recommended
and used in the treatment of varicosities. In most of these
stockings the pressure has been gradually reduced from the ankle to
the stocking top when the stocking is properly fitted. One stocking
has appeared in the market, however, in which pressure exerted in
the knee area has been reduced below that exerted on portions of
the wearer's leg immediately adjacent the knee area. Full length
stockings of the compressive type, regardless of the degree of
compression exerted on the wearer's leg, have two problems. Because
of extreme variation in the upper thigh dimensions of wearers even
when other portions of the leg fall within a particular standard
size range, full length stockings have been difficult to fit in the
thigh area. As a result, manufacturers of non-custom stockings tend
to make garments which will not bind the upper thighs of any
significant proportion of wearers whose legs otherwise require a
particular size stocking. The tendency, then, is to make an
enlarged thigh stocking whether it is enlarged by modifying a knit
full-fashioned blank or a cut powernet blank or is circular knit
and enlarged by a wedge shaped insert. Such enlargement, however,
sometimes causes the stocking to lose its self-support feature at
the top. It is common practice to make non-elastomeric stockings
self supporting by attaching a thigh encircling garter band of
elastic webbing whose leg-contacting inner surface is a non-slip
material such as urethane elastomer. This band may be attached
under the stocking fabric but in most instances is attached in edge
abutting relationship to the stocking welt, increasing the stocking
length by the width of the band.
Full length stockings which have to be supported by an encircling
garter band have had one undesirable feature, however. The elastic
band, which is quite stiff and bears against the leg with some
pressure, tends to irritate the upper inner thigh and to constrict
the deep and superficial blood vessel plexus there.
SUMMARY OF THE INVENTION
A primary object of this invention is the provision of a
self-supporting full length elastomeric yarn-containing stocking
which is nonbinding over a wide range of upper thigh circumferences
when worn and which has a soft and readily conformable elastomeric
yarn-containing fabric area available for covering the blood
vessels which are concentrated in the wearer's upper inner
thigh.
A further object of the invention is the provision of a stocking
meeting the primary object in which the soft and readily
conformable elastomeric yarn-containing fabric area is so located
that by slightly twisting the stocking, the area may be caused to
cover the upper inner thigh of either the right or the left
leg.
A still further object of the invention is the provision of means
attached to the stocking top whereby the circumference of the
stocking may be overlapped and fastened producing an effective
circumference which properly fits when otherwise the stocking would
be too large in the upper thigh for the particular leg being
fitted.
The primary object of the invention is attained in circular knit
garments by sewing a band of the usual garterlike elastic webbing
in edge abutting relationship to the stocking top welt with the
band ends sewn to and separated by a wedge, fastened point
downward, into a slit in the stocking upper thigh, the wedge top
and the band top being aligned and forming the stocking top. The
wedge, which should be of a soft and readily conformable elastic
fabric either in a single layer or a double layer, serves two
functions. It reduces the binding in the upper thigh area when worn
to a very small proportion of those who are otherwise fitted by a
given size stocking, and it also constitutes the area which
normally covers the deep and superficial blood vessel plexus in the
upper inner thigh. The wedge may be centered in the area of the
inner upper thigh but this placement necessitates the manufacture
of right and left leg stockings. Optionally, the wedge may be
inserted centered over the front or back fold line of the stocking
from which position it may be rotated about a quarter turn to cover
the inner thigh of either the right or left leg. The wedge sides
are secured by sewing to the sides of the stocking slit and to the
ends of the elastic webbing band by overedging or other appropriate
stitching. A preferred wedge fabric is one in which elastomeric
yarns are inlaid into jersey knit stitches with the elastomeric
yarns extending circumferentially when the wedge is secured in
place. Double fabric wedges are preferred, with the top folded edge
forming a roll-resistant stocking top in the wedge area. Doubled
fabric preferably should be folded so that the normal outside
surface is face to face and the normal inside surface forms the
wedge's outer surface. Where a single thickness of fabric is
utilized for the wedge, the top edge should be a soft selvage or it
should be hemmed or overedged or sealed with a soft thermoplastic
to make a ravel-resistant soft edge. A very effective wedge is in
the form of an equilateral triangle about 6 inches plus the garter
band width on each side.
Other variations may be made from circular knit stockings with
finished or welted top edges and enlarged upper thigh portions by
fastening to the inside of each a webbing band, corrugated
slip-resistant surface exposed, and with a gap between the ends.
The top edge of the band and stocking need not be but preferably
are approximately aligned.
When an elastic blank is formed either by cutting from powernet or
other suitable fabric or by full-fashioned knitting, the blank may
be altered to include sufficient material in the upper thigh area
to prevent binding. A projection above the top of the normal blank
may be made in the area intended to cover the upper inner thigh or
alternatively in the front center of the blank. If the top edge is
to be double, the projection should be double the width of the
garter band; if single, the edge should be finished and the width
should be the same as the garter band width. In this embodiment the
partial circumference of elastic webbing band may be sewn in edge
to edge abutting relationship to the stocking top except in the
area of the projection with the bare corrugated slip-resistant
surface of the band inside. Thereafter the ends of the band and the
adjacent ends of the projection either in single or doubled-over
form are sewn together, preferably in abutting relationship. A
modification of this cut and sew or full-fashioned method involves
sewing the band slip-resistant surface exposed inside a normal
stocking top with a gap between the ends thereof, or if a single
width projection is present, folding down the projection and sewing
the projection ends to the ends of the band.
The stockings of the invention may be made adjustable in the upper
thigh area by fastening means which permit that portion of the
stocking top not containing the band of elastic webbing to be
folded over the band and secured in place by a hook which is
secured to the band and is caused to pierce the folded-over fabric.
One or more separated hooks may be used but preferably a hook on
either side is provided. The fabric is of loose enough construction
as to permit piercing by the hook without injury.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1 and 2 illustrate respectively a typical stocking of the
invention viewed from the inner leg side and the front.
FIG. 3 illustrates the top portion of a preferred form of circular
knit stocking of the invention.
FIGS. 4 and 5 illustrate views of the top of a typical stocking
before and after the upper thigh circumference has been
adjusted.
FIGS. 6, 7, 8 and 9 illustrate typical elastic fabrics, including
elastomeric yarns suitable for the boot portions of the stockings
of the invention.
Referring to the drawings in greater detail, FIGS. 1 and 2
illustrate respectively the inner leg side and front view of a
typical circular knit stocking 10 of the invention as worn, with a
boot 11, a knee 18, a thigh 19 and a soft, readily conformable
upper thigh insert 15, all made of knitted elastic fabric. The
reciprocated heel 12 and the toe 13 are of typical heel and toe
construction made from typical yarns preferably of stretch nylon. A
partial round of elastic retention band 14 made with a corrugated
slip-resistant inner surface of urethane elastomer is sewn to the
upper narrow welt of the stocking proper projecting above the
stocking welt so that its top forms a continuous line with the top
of insert 15. The insert is overedged around its top edge and
around its juncture with the slit stocking thigh 19 and with band
14 by stitching 16. The insert 15 preferably is symmetrical about
the front or rear center line of the stocking so that it may be
twisted in proper position to locate the insert 15 over the
juncture "a" at the inner thigh, of the femoral, great saphenous,
and superficial lateral cutaneous, pudendal and iliac veins. This
plexus occurs approximately mid-way between the front of the thigh
and the mid-inner thigh as depicted in FIG. 1.
FIG. 3 illustrates a preferred construction in which the insert
wedge 15a is of doubled fabric. The fold line 15b constitutes a
portion of the top edge of the stocking. The fold is preferably
made with the normal fabric face folded in face to face
contact.
FIGS. 2, 4 and 5 illustrate the stocking of FIG. 1 with a hook 17
which is shown sewn to a portion of the band 14 adjacent the insert
15. The hook shown disengaged in FIGS. 2 and 4 is shown in FIG. 5
engaging a folded-over portion of the top margin of the insert 15.
This feature, which may be incorporated on either or both sides of
the insert 15, makes the upper thigh stocking portion adjustable in
circumference.
FIG. 6 shows a typical fabric 20 suitable for the stockings of the
invention, in which covered elastomeric yarns 21 are formed into
courses of knitted jersey stitches alternating with floats, the
floats being across different wales in adjacent rounds. Yarns 22,
which may be stretch synthetic yarns or usual nonstretch stocking
yarns such as nylon, silk, cotton, rayon, polypropylene and the
like, are formed into jersey courses. The elastomeric yarn 23 is
shown inlaid into one of the jersey courses of yarn 22.
FIG. 7 is the preferred typical fabric 30 suitable for the
stockings of the invention. The yarns 32 are preferably of Z-twist
stretch nylon, while yarns 33 are preferably of S-twist stretch
nylon but may be any non-elastomeric yarn. A covered elastomeric
yarn 31 is inlaid preferably into every other course as shown but
optionally in every course of jersey stitches.
FIG. 8 is another typical fabric 40 of the invention, in which
covered elastomeric yarns 41 are formed into knitted jersey
stitches alternating with floats, the floats being across different
wales in adjacent rounds. Yarns 42, preferably non-elastomeric
stocking yarns such as synthetic or natural yarns including stretch
synthetic yarns, are formed into course rounds of jersey
stitches.
FIG. 9 is another typical fabric 50, suitable for the stockings of
this invention. The jersey knit fabric has alternating rows of
stitches of synthetic or natural yarns 51 and covered elastomeric
yarns 52.
EXAMPLE 1 MEDIUM SIZE
Using 10 filament stretch nylon 30/2 yarn, made up and knitted an
automatic welt having a fully stretched circumference of 39 inches
in the usual manner using a 401 needle Scott & Williams AMF 3
3/4 inches stocking knitting machine. Immediately after the
transfer, exchanged yarns to 70/1, 17 filament Z-twist nylon 66
yarn on one feed and 70/1, 17 filament S-twist nylon 66 yarn on the
other feed. Frame circumference fully stretched measured 42 inches.
This frame was maintained to a point approximately at the upper
calf, at which time the frame was reduced abruptly because of
machine limitations but preferably within five to 10 courses to 32
inches fully stretched. This frame was maintained for approximately
120 course. The frame thereafter was gradually reduced at a
constant rate by reducing stitch size until at the ankle the frame
circumference measured 28 inches fully stretched. Thereafter, for
150 course rounds the frame remained at 28 inches circumference
fully stretched. Thereafter the frame was gradually increased to
the midpoint of the instep, at which point the frame measured 32
inches in circumference fully stretched. Thereafter a reciprocated
heel was knitted in the usual manner. After completion of the heel,
circular motion was resumed, the stitch being gradually reduced to
a point between the heel and the toe to a circumference of 28
inches fully stretched. This circumference was maintained to the
ring toe. Thereafter the ring toe including run-resist courses were
knitted in the usual manner. Thereafter a reciprocated toe was
knitted in the usual manner.
After the nylon frame was properly knitting, the elastomeric yarn
was incorporated as follows: Immediately following completion of
the top welt, the inlay feed was activated and a single covered
elastomeric yarn having a 280 denier spandex core and a covering of
70/1, 34 filament stretch nylon 66 was inlaid in the course of
jersey stitches knitted-off on the center feed. The elastomer
should be metered in at a rate sufficient to produce a fabric
having a fully stretched circumference of 38 inches. Knitting the
frame including the inlaid elastomeric yarn continued at that
stretched circumference to a point just above the calf, at which
point the amount of metered elastomeric yarn was gradually reduced
to the point at the upper calf where the circumference was 27
inches fully stretched. The elastic yarn metering rate was
maintained constant for about 100 nylon courses. Thereafter the
elastomeric yarn was gradually increased per round to the midpoint
of the instep, at which point the stocking had a fully stretched
circumference of 26 inches. At that point the elastomeric yarn was
taken out and the reciprocated heel knitted. After completion of
the heel, the elastomeric yarn was reintroduced in the usual manner
and gradually decreased in amount per round to a point between the
heel and toe, at which point the stocking foot fully stretched
measured 22 inches in circumference. The elastomeric yarn was fed
at this latter rate constantly for 60 course rounds, after which
the elastomeric yarn rate was gradually increased to the ring toe,
at which point the elastomeric yarn was taken out and the ring toe
including run-resist courses were knitted in the usual manner.
Thereafter a reciprocated toe was knitted and the toe opening in
the sole under the base of the toes was stitched closed.
The finished stocking was preboarded at 220.degree. F. to
230.degree. F. for 45 seconds; the total steam treatment and drying
cycle lasted approximately 2 1/2 minutes; the total time, including
build-up, was about 3 minutes. (Temperatures above 240.degree. F.
are to be avoided if the most desirable products are to be
obtained.) Thereafter a 1-inch wide band of typical elastic webbing
of the type used for stocking garter tops was wrapped around the
stocking, the corrugated slip-resistant urethane elastomer side of
the band outward. The ends of the band abutted at the front fold of
the stocking but were not fastened together. The top of the
stocking and the top of the band were sewn together in this
position by overedge stitches. The band was then folded upward so
that it stood up from the stocking top, with the corrugated side
in. A fastening hook, similar to those illustrated in FIGS. 2, 4
and 5, was then sewn as illustrated to each side of the band about
1 1/2 inches from the band ends. (The distance may be anywhere from
three-fourths inch to 2 inches.) The stocking was then slit between
the band ends along the front fold for about 6 inches. A diamond
shaped piece of the same fabric as the stocking boot and about 6
inches across and 13 inches long, with the inlaid elastomeric yarn
running transversely, was folded to make substantially equilateral
triangle of doubled fabric. This triangular double-fabric wedge was
inserted into the slit in the stocking, point downward, with its
folded edge in alignment with the top of the band, and was overedge
stitched, as is illustrated in FIG. 3, to the sides of the slit in
the stocking and to the ends of the band of elastic webbing to
complete the stocking.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The stocking described in Example 1 is the preferred embodiment but
for some purposes other yarns than those used may be preferred by
others.
* * * * *