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Патент USA US2105381

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Filed Oct. 19, 1935
Patented Jan. 11, 1938
Eugen Steiner, Oradea, Rumania
Application October 19, 1935, Serial No. 45,786
In Austria June 18, 1935
1 Claim. (Cl. 36-71)
Insoles for correcting weak insteps or ñat feet layers being impregnated for example with nitro
must, as is known, possess suñicient rigidity to cellulose and stuck on the outer veneers.
form a counterbearing for the abnormal foot
The veneers I are joined in the manner cus
shape. With this object in view such insoles tomary in the making of plywood plates so that
Cl were made partly of leather and partly of metal.
the grains of two superposed veneers extend at 5
Such insoles, however, do not quite iuliill the right angles to one another. The portion of the
hygienic requirements as they impede the blood insole formed by the veneers I is, as can be seen
circulation in the whole foot sole, subject the from Fig. 3, so shaped that it is reduced in the
tendons and nerves to a continuous painful longitudinal direction of the insole from the
pinching, rust after being in use for a relatively middle towards both ends or the end portions 4
short time, and sometimes even break under and 5 are thinner than the middle portion so
heavy strain.
that the insole is slightly yieldable at these end
The invention relates to an insole especially portions but in the main portion possesses suñi
for weak insteps and flat feet which overcomes cient rigidity for supporting the arch and the
the drawbacks above set forth. The support is heel. The form of the insole is accurately
characterized primarily in that it is composed adapted to the shape of the foot to be corrected.
of several wood veneers adapted to the shape of The middle portion 6 is convexly curved accord
the foot, interconnected like a plywood plate and ing to the abnormality of the foot and the end
provided on both sides with a covering of yield
portions are provided with depressions 1 and 8
able material, such as leather, intermediate lay
respectively in the heel and ball regions.
ers of a ñbrous substance being interposed be
The insole is bent upwards at both sides in
tween the veneers and the covering. 'I‘he ve
the transverse direction. The bent up portion 9
neers are preferably reduced in the longitudinal situated on the inner side of the shoe, towards
direction of the insole from the middle towards the middle of the body, is higher than the bent
both ends so that the support is slightly flexible up portion I0 on the other side so that the insole
on these end portions.
In this manner an insole is produced which
is absolutely free from metal and nevertheless
possesses the rigidity necessary for an ortho
pedic support, without being moreover absolutely
unyielding so that it can slightly deiorm under
too heavy loading. The insole according to the
invention is so constructed that it forms a longi
tudinal and transverse support for the foot.
An embodiment of the invention is illustrated
in the accompanying drawing in which:
Fig. 1 shows the insole in top plan view.
Fig. 2 is a side elevation cf Fig. 1.
Fig. 3 is a section on line III-III of Fig. l.
Fig. 4 is a section on line IV-IV of Fig. 3.
The insole consists of several superposed wood
veneers I interconnected by an adhesive sub
stance insoluble in water, such as nitro-cellulose,
and shaped to correspond to the shape of the
foot, and of an outer covering 2 of a slightly
yieldable substance, such as leather. Between
the veneers I `and the outer covering 2 inter
mediate layers 3 of a ñbro'us material, preferably
in the form of woven material or fabric, these
forms so to say a bed for the joint of the foot,
which bed is constructed to correspond with the
anatomical proportions of the foot and supports
the foot in longitudinal and transverse direction.
The insole has perforations I I to allow for 30
perspiration of the foot.
The improved insole according to the invention
can be made in different shapes according to the
kind of abnormality of the foot and the stage of
the disease, so that it is possible to correct the 35
abnormality of the foot in stages.
I claim:
An insole arch support, comprising in combi
nation a plurality of thin wood veneer layers
interconnected by means of an adhesive insolu 40
ble in Water and covered on both sides with an
outer covering of leather, and intermediate lay
ers of fibrous material impregnated with a water
proofing substance interposed between the outer
wood veneer layers and the said outer covering 45
of leather and stuck on the outer veneer layers,
the support being tapered towards its edges.
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