U.S. patent number 3,694,940 [Application Number 05/082,306] was granted by the patent office on 1972-10-03 for inner shoe for footwear.
This patent grant is currently assigned to Dr. Justus Rieker & Co.. Invention is credited to Rudolf Stohr.
United States Patent |
3,694,940 |
Stohr |
October 3, 1972 |
INNER SHOE FOR FOOTWEAR
Abstract
An inner shoe comprising a non-woven structure based on paper
for fitting within footwear such as a ski boot to absorb
perspiration. The inner shoe can be formed of one piece only by
folding and joining the edges of the folded portions, or from two
molded half-shells.
Inventors: |
Stohr; Rudolf
(Tuttlingen/Wurtt, DT) |
Assignee: |
Dr. Justus Rieker & Co.,
(Tuttlingen/Wurtt, DT)
|
Family
ID: |
6606423 |
Appl.
No.: |
05/082,306 |
Filed: |
October 20, 1970 |
Foreign Application Priority Data
|
|
|
|
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Nov 15, 1969 [DT] |
|
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G 69 44 404.8 |
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Current U.S.
Class: |
36/10; 36/88;
36/136; 36/98 |
Current CPC
Class: |
A43B
7/34 (20130101); A43B 19/00 (20130101) |
Current International
Class: |
A43B
19/00 (20060101); A43B 7/34 (20060101); A43B
7/00 (20060101); A43b 003/10 () |
Field of
Search: |
;36/2.5R,2.5AL,9A,10 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Lawson; Patrick D.
Claims
I claim:
1. A single usage type inexpensive inner shoe for footwear, said
inner shoe comprising a structure made from a single ply of
non-woven paper base material.
2. An inner shoe as specified in claim 1, wherein said structure is
of one piece unitary construction and includes at least one joining
seam joining two engaging edges of said structure.
3. An inner shoe as specified in claim 1, wherein said structure
further comprises two individual non-woven structural elements and
at least one joining seam attaching said elements together.
4. An inner shoe as specified in claim 1, wherein said structure
further includes at least one joining seam comprising juxtaposed
edges of said structure and adhesive means securing said edges to
each other.
5. An inner shoe as specified in claim 1, wherein said structure
further includes a plastic coating on the outwardly facing upper
surface thereof.
6. An inner shoe as specified in claim 5, wherein said structure
further includes at least one joining seam comprising juxtaposed
edges of said structure and a plastic weld securing said edges to
each other.
7. An inner shoe as specified in claim 1, wherein said structure
further includes at least one joining seam extending substantially
in the longitudinal direction of the shoe.
8. An inner shoe as specified in claim 1, wherein said structure
further comprises bottom edges thereof in mutually overlapping
relation.
9. An inner shoe as specified in claim 1, wherein said structure
includes an instep zone having an opening in the top thereof for
insertion of a wearer's foot, and a cut away portion extending from
said opening, facilitating entry of said foot into said structure.
Description
The present invention relates to an inner shoe for footwear.
BACKGROUND OF THE INVENTION
The expression "boots" is generally understood to mean weatherproof
footwear which is required to prevent, in particular, penetration
by moisture. In order to protect the foot of a wearer of a boot of
this kind against the cold, it is already known to use "inner
shoes" made from knitted and partly lined textile materials. It is
true that such "inner shoes" can, like stockings, be washed, and
therefore used again and again, but they are relatively costly and,
if they are to be changed frequently, they involve considerable
purchasing expenses. In this connection, it must be remembered that
the foot is subjected, in such weatherproof boots, which are not
very air-permeable, and can even be completely impermeable, in
particular in the case of rubber and plastics boots, to increased
perspiration, so that the inner shoe requires in many cases, even
after being worn only once, to be changed and washed.
This applies particularly to sports boots, such as ski boots, which
are often continuously in use throughout a holiday. For these
purposes, it is necessary that several pairs of textile inner shoes
should be available and that they should be frequently washed. That
is, however, inconvenient, and in many cases it is only possible to
a limited extent.
As a result of perspiration absorption, textile inner shoes should
be regarded as personal underclothing, and, for hygienic reasons,
are unsuitable for commercial hiring. However, hiring of clothing
is a commercial activity which at the present day frequently
extends to ski boots.
With the invention, it is intended to provide a thermally
insulating inner shoe which has a special capacity for the
absorption of moisture and is capable of being manufactured so
inexpensively that it may be thrown away, in the manner of a
disposable article, after soiling or after being used on one
occasion only. According to the invention, this is achieved by
manufacturing the inner shoe from a non-woven material based on
paper.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an inner shoe for
footwear, said inner shoe comprising a structure made from a
non-woven material based on paper.
Non-woven materials based on paper have the properties of good
thermal insulation and moisture absorption capacity. They are
inexpensive and may be manufactured so as to have a degree of
strength adequate to withstand the stressing to which an inner shoe
is normally subjected in use.
A pasty basic mass for producing a non-woven paper structure is
itself capable of being pressed-out in suitable molds, so that an
inner shoe may be manufactured by assembling two pre-shaped "half
shells." Preferably, however, the inner shoe is manufactured from
non-woven elements cut or punched from larger webs of non-woven
material. Depending on the cut and/or ability to undergo curvature
of the non-woven structure, the inner shoe may be assembled from
one or more such non-woven structural elements. The non-woven
structural element or elements is or are assembled in the shape of
the inner shoe, the seams preferably being adhesively secured
together. In order to compact the non-woven materials, to prevent
the penetration of moisture and/or merely to achieve less expensive
and simpler assembly at the seams, the fibers of the non-woven
structure may be coated with a plastics coating on the outwardly
facing upper surface, such a plastics coating permitting the
plastics welding of the elements of the non-woven structure at the
seams. The plastics coating may be produced by the spraying on of a
plastics dispersion or solution.
The inner shoe may consist for example of a one-piece non-woven
paper structure designed to be continuous (seamless) in the bottom
zone of the shoe and joined together by means of two seams, one of
which extends from the toe, via the instep, as far as the opening
for insertion of the foot of the wearer, whereas the other extends
along the rear apex line of the shoe. The non-woven paper structure
may, however, also be designed to be continuous in the zone of the
Achilles tendon of the wearer, and joined together in the bottom,
toe and instep zones. When the shoe is manufactured from two
separate non-woven structural elements, the latter preferably have
the same shape and are joined together along a seam extending in
the longitudinal direction of the shoe.
Depending on the thickness of the material of the non-woven
structure, it may be expedient to reinforce the inner shoe in its
bottom zone by designing the element or elements of the non-woven
structure requiring to be joined together in this zone to overlap
there.
The non-woven paper structures used may themselves have the ability
to undergo curvature, or a resilience such that the inner shoe
(within a specific size range) adapts itself to the shape of the
foot of the user. In order to facilitate introduction of the foot
into the shoe having regard to the capacity for curvature of the
non-woven paper structure used, it may be expedient to provide the
shoe, preferably in the instep zone, with a slot extending from the
shoe opening, those portions of the shoe upper which constitute the
slot edging preferably being designed to overlap over the slot in
use of the shoe.
Owing to the inexpensive starting material and simple manner of
manufacture, the inner shoe according to the invention, which may
be manufactured as a mass-produced article, can without difficulty
be produced so inexpensively that, from the economic viewpoint,
even if it is used only once it readily holds its own with the
known inner shoes made from knitted textile materials. Indeed, it
is very much more convenient to handle, owing to the elimination of
washing and drying, as is so in the case of any disposable
article.
By the use of the inexpensive inner shoe according to the
invention, the commercial lending of ski boots may be given a
considerable stimulus, since it becomes possible to offer for hire
a boot which is entirely satisfactory from the viewpoint of hygiene
and which has not contact with the foot perspiration of user.
BRIEF DESCRIPTION OF THE DRAWINGS
Two embodiments of the invention are described in greater detail in
the following description with reference to the accompanying
drawings, in which:
FIG. 1 is a perspective view of the one embodiment of inner shoe
according to the invention;
FIG. 2 is a diagrammatic longitudinal section through a ski boot
having inserted therein an inner shoe according to FIG. 1; and
FIG. 3 is a perspective view of the both parts which compose the
other embodiment of the inner shoe according to the invention.
DESCRIPTION OF PREFERRED EMBODIMENT
The "inner shoe" shown in FIG. 1 is manufactured from a one-piece
non-woven paper structure 1 designed to be continuous in the zone
of the Achilles tendon of a wearer, and having two edges joined
together by an adhesively connected seam 2 in the bottom, heel and
instep zones. The foot introduction opening 3 in the ankle zone may
be widened by leaving unattached a portion of the seam 2 extending
in the zone of the instep.
The longitudinal section through a ski boot shown in FIG. 2 does
not show any kind of padding or the like. Vulcanized-on to the
upper 4 of the ski boot is a sole 5 on the side of which facing the
interior of the shoe there is arranged an insole 6. Inserted in the
interior of the ski boot is the inner shoe 1 according to FIG. 1
(also shown in section). The seams 2 are omitted from FIG. 2, for
clarity.
The "inner shoe" according to the invention can also be
manufactured from two pieces of non-woven paper structure. These
pieces 1', which are shown in FIG. 3, are, for instance, dish-like
shaped (e.g. by pressing of the paper structure) and joined
together by an adhesively seam extending near the longitudinal
central plane of the "inner shoe" and the edges 2' of the both
pieces.
* * * * *