U.S. patent number 3,798,503 [Application Number 05/263,149] was granted by the patent office on 1974-03-19 for protective foot cover.
This patent grant is currently assigned to Kleen Test Products Inc.. Invention is credited to Ray E. Larsh, Donald I. Urbansky.
United States Patent |
3,798,503 |
Larsh , et al. |
March 19, 1974 |
PROTECTIVE FOOT COVER
Abstract
A sanitary and protective foot and shoe cover is formed of a
single sheet of flexible material. A top opening in the cover
accommodates the leg of the wearer. The cover includes a continuous
seamless bottom sole portion and a top portion having a forward toe
and rear heel seam extending upwardly from the sole portion to the
leg opening. An elastic band is provided about the opening and
through the forward toe seam to provide a covering over the foot
which generally conforms to the foot and is resiliently attached
thereto. A conductive tape is sewed to the seamless sole portion
and is extended upwardly through the protective cover at the
non-elasticized heel seam.
Inventors: |
Larsh; Ray E. (Milwaukee,
WI), Urbansky; Donald I. (Thiensville, WI) |
Assignee: |
Kleen Test Products Inc.
(Milwaukee, WI)
|
Family
ID: |
23000582 |
Appl.
No.: |
05/263,149 |
Filed: |
June 15, 1972 |
Current U.S.
Class: |
361/223; 36/9A;
36/9R |
Current CPC
Class: |
A43B
3/163 (20130101) |
Current International
Class: |
A43B
3/16 (20060101); A61n 001/14 () |
Field of
Search: |
;317/2B
;36/9R,9A,10 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Hix; L. T.
Attorney, Agent or Firm: Andrus, Sceales, Starke &
Sawall
Claims
I claim:
1. A protective cover to be worn over the shoe or foot of an
individual person to essentially completely enclose the foot
portion, comprising a flexible sheet material body defining a
pocket having a top opening through which the foot is inserted,
said body being formed with a sole portion and an upper enclosing
top portion, said top portion including said top opening and a heel
portion and a toe portion and having a seam extending
longitudinally of the toe portion from the sole portion to the top
opening,
a first resilient strip secured along a substantial portion of the
length of the seam with a gathering of the flexible sheet material
along the corresponding length of the toe portion to provide an
expandable cover which readily conforms to a wide variety of
different sized and shaped feet.
2. The cover as defined in claim 1, wherein said resilient strip is
secured within said toe seam and secured at a plurality of spaced
points to create a multiple gathering of the flexible material
along the corresponding length of the toe portion.
3. The cover as defined in claim 1 and further including a second
resilient strip secured about the periphery of the top opening for
resiliently collapsing the periphery of said opening against the
upper portion of shoe and/or leg of the individual to completely
enclose the foot portion.
4. The cover as defined in claim 1 and further including a
grounding strap means for preventing buildup of static electricity
on said person, said grounding strap means being secured along the
exterior sole portion of the covering, said strap having an
extension portion extending from the heel portion of the cover for
attachment to the body of the wearer.
5. The cover of claim 1, wherein one end of said first resilient
strip terminates at said sole portion and the opposite end of said
strip terminates at said top opening, said sole portion being
smooth and free of gathering.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a sanitary protective cover for
the feet and shoes of a person and particularly for temporary
application so as to maintain a sterile condition for hospital
rooms and the like.
In certain work and personnel areas, special shoe coverings are
provided to cover the shoes of personnel within the room and
thereby prevent dust and other contaminants on the shoes from
contaminating the area atmosphere. A shoe cover may also
advantageously be applied to protect the wearer's shoes which can
be damaged by airborne foreign matter which can come in contact
with the shoe. For example, in a hospital, various rooms, such as
surgical procedure rooms, are subject to severe restrictions on
contamination of the atmosphere. Further, in hospital cast rooms
and the like, the plaster of paris material may tend to fall onto
the shoes of persons working near the casting table. As such
material will adversely affect shoe leathers, the shoes of
personnel are advantageously covered. Similar situations may be
encountered in commercial establishments. As a result, a demand
exists for a relatively inexpensive and replaceable shoe cover.
Various shoe covers for use in such applications have been
suggested. For example, U. S. Pat. No. 3,648,109 discloses a
sanitary shoe covering which is formed of a foldable material
folded along a heel line and sewed throughout the sole and toe area
with elastic provided about the foot opening and the sole area to
accommodate various size shoes. A conductive tape is sewn into the
sole seam and projects outwardly. The end extends inwardly and
through the foot opening for attachment to the body of the wearer
to prevent the static charge accumulation on the person. This shoe
covering can be adapted to a large variety of shoe or foot sizes.
The lower elastic portion is, of course, subjected to the pressure
of the wearer and the lower seam may create a small ridge or
multiple humps.
SUMMARY OF THE INVENTION
The present invention is particularly directed to a new and
improved sanitary and protective foot and/or shoe covering which is
readily adapted to a large variety of sizes while maintaining
simplicity and reliability in construction. Generally, in
accordance with the present invention, the covering is formed of a
flexible, continuous sheet which is folded laterally upon itself
and sewed in the heel and toe portions of the foot while defining a
completely continuous and uninterrupted sole portion. The toe and
heel sewed portions terminate in a leg accommodating opening which
is provided with a suitable elastic construction for accommodating
the leg of the wearer. In addition, an elastic means is provided in
the seam of the toe portion to permit the expansion of the cover to
accommodate a wide variety of shoe and foot sizes. The elastic
means is thereby maintained above the sole portion and thus is not
subject to the pressure and forces of the person's foot or the
like. This provides greater protection to the stretch
construction.
Where an antistatic means is to be employed, a tape or strap is, in
accordance with a further aspect of this invention, attached to the
sole portion lying parallel to the sole portion and with an end
extended upwardly at the heel for attachment to the wearer. This
maintains a smooth, continuous sole portion.
BRIEF DESCRIPTION OF THE DRAWING
The drawing furnished herewith illustrates the best mode presently
contemplated by the inventors for carrying out the subject
invention in which the above advantages and features are clearly
disclosed, as well as others which will be readily understood from
the following description.
In the drawing:
FIG. 1 is a perspective view of a shoe cover applied over a shoe
and the foot of a wearer and constructed in accordance with the
teaching of the present invention;
FIG. 2 is a top plan view of the protective covering;
FIG. 3 is a bottom plan view of the cover;
FIG. 4 is a rear elevational view of the cover;
FIG. 5 is a vertical section taken on line 5--5 of FIG. 1; and
FIG. 6 is a developed view of the material prior to folding and
sewing.
DESCRIPTION OF ILLUSTRATED EMBODIMENT
Referring to the drawing and particularly to FIG. 1, a sanitary and
protective cover 1 defines a pocket overlaying and enclosing a shoe
2 of a wearer 3. The cover 1 completely encloses the shoe 2 and
includes a top foot opening 4 which fits snugly about the foot of
the wearer 3 immediately above the top edge of the shoe 2.
The cover 1 is formed of any suitable flexible and foldable
material. The cover 1 can be readily and conveniently formed of a
suitable paper or cloth material which can be sewed and which has
sufficient strength to permit wearing by a person under normal
walking conditions within a given room or area. The cover 1 may
also be formed from a suitable plastic or of a material having a
plastic portion in the seam areas as hereinafter discussed for
interconnection through heat, pressure and combinations
thereof.
The shoe cover 1 in accordance with the present invention includes
a continuous, uninterrupted sole portion 5 which is joined with an
upper or top portion having a toe seam 6 and a heel seam 7. The
heel and toe seams 6 and 7 extend upwardly and terminate in spaced
relation to each other at the edge of the foot opening 4 which
allows the wearer to apply and remove the covering from the shoe 2
as shown in FIG. 1.
The heel seam 7 is a fixed, nonextendible, sewed seam in the
illustrated embodiment of the invention.
In contrast, the toe seam 6 is sewed with an integrated elastic
material, shown as a rubber strip 8 which is sewn into the seam by
the interconnecting thread 9. The strip 8 is applied in an expanded
position and secured along the seam 6 to produce a plurality of
attachment points. When the sewed seam 7 is released, the
elasticity of the inner strip 8 provides an automatic, incremental
gathering of the material to shorten the length of the cover 1 to a
minimum size. This provides an elastic support of the toe portion
such that when the cover 1 is applied over a shoe 2, it permits
resilient extension of the toe portion. This results in conforming
of the cover 1 to the shoe 2 of the wearer 3 as shown in FIG. 1,
over a wide range of shoe sizes and styles.
In addition, an elastic material 9 is similarly sewed into or
otherwise interconnected to the peripheral edge of the opening 4
and in the illustrated embodiment of the invention completely
encircles the opening. This establishes a reduced resilient opening
to firmly apply the edge against the leg portion of the wearer 3 to
additionally retain the cover 1 to the foot and to completely
enclose the shoe and thereby prevent escape of any foreign matter
carried on the foot, or the contact of any airborne matter with the
shoe.
A conductive strap 10, which may conveniently be conductive tape
material, is attached to the sole portion 5 so as to lie flat upon
the sole portion. An end of the strap 10 extends upwardly through
the heel portion of the cover 1 for attachment to the wearer's body
as at 11 in FIG. 1. The strap 10 is shown sewed to the sole portion
5, but may be attached in any suitable manner.
In particular, the illustrated cover 1 is preferably formed from a
single sheet 12 of material such as shown in FIG. 5 which can be
readily die cut or otherwise formed on a mass production process
from an elongated length of the material for the cover. The back
heel edge 13 is a straight line. The leg opening 4 is formed by the
opposite side edge 14 extending from the back edge 13 and
terminating in the edge 15 which is curved to produce a tapered toe
portion. In the construction, the sheet 12 is merely folded upon
itself to align the opposite halves of the back heel edge 13 to
define a generally straight heel portion and a more or less curved
toe portion. The heel and toe seams 6 and 7 are then interconnected
in any suitable manner such as sewing or the like along a seam line
as shown at 16 and 17 where the material is a paper-like fabric or
similar material. If formed of a heat and/or pressure sealable
material, at least in the seam portions, the edges may be
correspondingly attached. The toe seams 6 and the top opening 14
are provided with the expanded or stretched resilient material,
which can be the strips 8 and 9 of a suitable rubber, synthetic
rubber or the like. The elastic material results in a contraction
of the toe portion and the foot opening. As a result, when the
cover 1 is applied to the shoe, it will generally conform to the
shoe with the opening snugly drawn about the upper portion of the
foot to completely enclose the shoe.
The antistatic contact strap 10 can, of course, be applied before
or after the sewing of the toe and heel portions. It can
advantageously be first applied and then sewed into the adjacent
lower ends of the heel and toe portion, as shown. The integral
attachment extension extends upwardly and through the top opening
for convenient application to the wearer as shown in FIG. 1.
This provides a convenient and inexpensive covering construction
which can be practically applied in special rooms and areas of
hospitals, commercial and other institutional buildings and the
like.
Various modes of carrying out the invention are contemplated as
being within the scope of the following claims, particularly
pointing out and distinctly claiming the subject matter which is
regarded as the invention:
* * * * *