U.S. patent number 3,691,658 [Application Number 05/128,703] was granted by the patent office on 1972-09-19 for article of footwear.
Invention is credited to Thomas Barbeau, Nicholas Di Perno, Paul Stiefenhofer.
United States Patent |
3,691,658 |
Di Perno , et al. |
September 19, 1972 |
ARTICLE OF FOOTWEAR
Abstract
An article of footwear is described in the form of a calf-length
boot for cold weather wear. The boot assembly comprises an inner
boot and an outer shell, the inner boot being formed in a boot
shape from a relatively thick layer of soft, pliable foam plastic
material and having sufficient dimensional rigidity to maintain an
erect boot shape. The outer shell has a sole portion and an upper
portion, the sole portion being of a traction material with a wear
resistant surface and being peripherally joined to an upper portion
of thin, pliable sheet material. The inner boot fits snugly within
the outer shell to form an erect boot assembly.
Inventors: |
Di Perno; Nicholas (Verdun,
CA), Stiefenhofer; Paul (Westmount, CA),
Barbeau; Thomas (Montreal, Quebec, CA) |
Family
ID: |
22436565 |
Appl.
No.: |
05/128,703 |
Filed: |
March 29, 1971 |
Current U.S.
Class: |
36/4 |
Current CPC
Class: |
A43B
3/02 (20130101) |
Current International
Class: |
A43B
3/00 (20060101); A43B 3/02 (20060101); A43b
001/10 () |
Field of
Search: |
;36/2.5R,4,7.3,9,2.5AL |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Lawson; Patrick D.
Claims
We claim:
1. An article of footwear comprising a boot being formed of a
substantially flat sole portion joined to a calf-high upper portion
both made from a relatively thick soft, pliable foam plastic
material and having sufficient dimensional rigidity to
independently maintain an erect boot shape, and an outer shell
having a substantially flat sole portion and a calf-high upper
portion, the sole portion of the shell being made of a thin
traction material with a wear resistant surface and being
peripherally joined to an upper portion of thin, pliable sheet
material, said boot fitting snugly within the outer shell to form
an erect boot assembly with the outer shell assuming the shape of
the boot.
2. An article according to claim 1, wherein the outer shell
comprises a flat sole portion, a lower portion of water-proof sheet
material surrounding the foot and ankle and being peripherally
joined by a seam to the sole portion and an upper portion of thin,
pliable material covering the leg and instep and peripherally
joined to said lower portion.
3. An article according to claim 2 wherein the sole portion of the
outer shell is made from a natural or synthetic rubber sheet
material.
4. An article according to claim 3 wherein the lower portion of the
outer shell is made from a vinyl-coated nylon fabric and the upper
portion is made from a woven nylon fabric with a water-proof
finish.
5. An article according to claim 3 wherein ring-holding loops are
provided in the seam joining the outer shell upper and lower
portion, these being positioned on opposite sides of the
instep.
6. An article according to claim 1 wherein said boot is made
entirely from material about one inch thick.
7. An article according to claim 1 wherein said boot is made of a
foam plastic material at least one-half inch thick.
8. An article according to claim 1 wherein said upper portion of
said boot is formed from first and second panels of foam plastic
material, said first panel bending around to form the rear portion
of the boot and being joined at the toe by a vertical seam, said
second panel extending down the front of the boot and over the
instep out to the toe portion and being joined to said first
panel.
9. An article according to claim 8 wherein said flat sole portion
of said boot is formed of first and second superimposed layers of
foam plastic material.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to footwear and, more particularly, to a
lightweight boot for cold weather wear.
2. Description of the Prior Art
There are many different kinds of lightweight footwear available
today for cold weather use. These are typically formed with a thick
rubber sole, a leather or nylon fabric upper and some form of a
heavy fleece lining sewn into the boot. A typical example of such a
boot can be found in Hiestand U.S. Pat. No. 2,820,308 issued Jan.
21, 1958. Such a boot is, of course, formed on a last in the usual
shoe-making equipment so that the foot encompassing portion is
quite stiff and depends on a relatively exact size for fitting the
foot.
Eskimos have for centuries worn mukluks, which are soft boots lined
with fur and usually made of sealskin or reindeer skin. The mukluk
usually contains no rigid portions and fits softly around the foot
and has been noted for its extreme warmth and comfort particularly
in very cold weather conditions. While many people would, indeed,
like to own authentic Eskimo mukluks, they are generally available
only as a rather expensive luxury item.
It is the object of the present invention to provide a very
lightweight and inexpensive soft boot which provides excellent
protection from the cold and can be used for apres-ski, snowmobile
and other outdoor uses.
SUMMARY OF THE INVENTION
The article of footwear of this invention is in the form of a boot
assembly having an inner boot and and outer shell. The inner boot
is formed in a boot shape from a relatively thick layer of soft,
pliable foam plastic material and has sufficient dimensional
rigidity to maintain an erect boot shape. This foam plastic boot
then fits snugly within an outer shell of a soft, flaccid material.
The outer shell has a sole portion and an upper portion, the sole
portion being of a traction material with a wear resistant surface
and being peripherally joined to an upper portion of thin, pliable
sheet material, e.g., nylon fabric.
DESCRIPTION OF PREFERRED EMBODIMENTS
The inner boot can be conveniently made from soft polyurethane foam
and can be either directly molded as a unitary article or from
panels cut from flat sheets of the polyurethane foam and joined
together. This inner boot has sufficient dimensional rigidity to
permanently maintain its boot shape and may typically be about 1/2
to 1 inch thick. This thick soft foam molds very easily around the
foot and, because of its softness, will be snugly retained on feet
of a variety of different sizes.
If desired, the sole portion of the inner boot can be of a somewhat
harder foam than the upper portions to provide some extra
cushioning for the soles of the feet.
The outer shell portion is formed as a separate boot to fit snugly
around the inner foam boot and this outer shell is made from a very
thin, flaccid material such as nylon fabric. Thus, it is little
more than a thin sheet which surrounds and protects the foam inner
boot.
The outer shell has a sole portion of traction material, which can
be a relatively thin sheet of natural or synthetic rubber with a
roughened outer surface and this is peripherally joined to an upper
portion of the thin, flaccid sheet material. The outer shell upper
preferably has a panel adjacent the sole made from vinyl-coated
nylon fabric with a narrow portion serving as a side wall for the
forward portion of the foot merging into a wide portion serving as
a side wall for the heel and ankle. The upper edge of this foot
embracing section is joined by a seam to nylon fabric which covers
the instep and surrounds the leg portion of the boot.
To provide some adjustment to the tightness on the wearer, a series
of rings can be mounted in the seam joining the two portions of the
outer shell upper in the region of the instep. Tie laces can then
be looped across the instep between these rings to pull the boot up
snugly on the foot of the wearer.
An additional drawstring can be provided at the top edge of the
outer shell to pull the boot very snugly around the leg of the
wearer so that no snow can accidently fall down inside the
boot.
Certain preferred embodiments of the invention will now be
illustrated by the attached drawings in which:
FIG. 1 is a perspective view of the completed assembled boot;
FIG. 2 is a sectional view of the boot shown in FIG. 1;
FIG. 3 is a side elevation of the inner boot; and
FIG. 4 is a rear elevation of the inner boot.
As will be seen from FIGS. 1 and 2, the outer shell A has a thin
natural crepe rubber sole 1 which is sewn by peripheral seam 2 to a
vinyl-coated nylon fabric foot enclosing portion 3. The foot
enclosing portion 3 wraps around the heel and is joined at the toe
by means of the sewn seam 4. The foot enclosing portion 3 has a
narrow portion with an upper edge 6 which embraces the forward
portion of the foot and this merges upwardly to a wide portion with
an upper edge 5 which embraces the heel and ankle. The upper edges
of this foot embracing portion 3 are sewn by a seam 8 to a nylon
fabric 7 which covers the instep and surrounds the leg of the
wearer. This nylon fabric 7 has a central seam 9 extending from the
toe up to the top of the boot and also a lateral instep seam 12. A
peripheral pocket 10 is formed at the top edge of the outer shell
and a tie lace 11 is inserted into this pocket.
In the seam 8 joining the two portions of the outer shell upper is
inserted fabric loops 13 for holding lacing rings 14. A tie lace
can then be placed in these rings 14 for drawing the boot up snugly
on the foot of the wearer.
As will be seen from FIGS. 2, 3 and 4, the inner boot B can easily
be formed from commercially available sheets of polyurethane foam
plastic. A sole portion 20 is first provided and this may be of a
somewhat stiffer foam material than is used for the side walls to
provide some extra cushioning for the sole of the foot. The entire
upper portion of the inner boot can be formed from two panels of
polyurethane foam plastic material with one large panel 21 bending
around the rear portion of the boot and being joined at the toe by
way of vertical seam 22. The seam 22 as well as the join 23 between
the upper and the sole 20 can be done by way of an adhesive or by
heat-sealing. To provide the necessary shape to the inner boot, a
second panel 24 is provided which extends down the front of the
boot and over the instep out to the toe portion. This front panel
24 is joined to the main panel 21 by way of seam 25.
As will be seen from FIG. 2, an additional insole 26 of soft
polyurethane foam plastic can be inserted into the inner boot to
provide additional softness for the wearer.
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