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Патент USA US2090770

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amano
Ííaten'tecl Aug. 24, 1937
UNITED STATES @ATENE ÜÈQFEQE
2,090,770
SHOE BOTTOM UNIT
John M. Whelton, Peabody, Mass., assigner to
United Shoe Machinery Corporation, Pater
son, N. J., a corporation of New Jersey
Application May 28, 1936, Serial No. 82,283
9 Claims. (Cl. Sii-22)
This invention relates to improvements in shoe shoe bottom unit or reinforced insole showing the
bottom units. The present application is in part upper side of the unit;
a continuation of my earlier application Serial
Fig. 2 is a perspective View of an insole unit
No. 600,921, ñled March 24, 1932, upon which
of modified construction showing the lower side
5 United States Letters Patent No. 2,065,463 was
granted December 22, 1936.
The present invention provides a shoe bottom
l
unit or reinforced insole of an improved construc
tion particularly adapted for use in the manufac
10 ture of shoes the uppers of which are to be per
manently secured in overlasted position by means
of cement and are also to be stapled or otherwise
temporarily secured to the insoles to hold them
in place during the setting of the lasting cement.
The improved shoe bottom unit herein illustrated
comprises a relatively flexible insole which is
provided with a lasting lip and which is split
from its rear extremity to a location in the vicin
ity of the ball line to divide its heel and shank
portion into upper and lower flaps or layers which
are integral with the forepart of the insole, a rela
tively stiif heel and shank reinforcing piece
which is interposed between the upper and lower
insole flaps or layers and a shank stilfener which
is also located between the flaps or layers in the
shank portion of the insole. The insole may be
composed of leather or other suitable flexible in
sole material and the lasting lip may advanta
geously be formed integrally with the substance of
the insole or, if desired, it may consist of a tape
n...
...Vi
Fig. 4 is a cross-sectional View of the shank
portion of the insole unit shown in Fig. 1; and
Fig. 5 is a View similar to Fig. 4 but showing an
insole unit provided with a lasting lip of modified
construction.
Referring to the drawing, the improved shoe
bottom unit or reinforced insole 30 therein shown
comprises a relatively flexible insole member 32, 15
a relatively stiff reinforcing member or heel and
shank piece 35i, and a metallic shank stiifener 36.
The insole member 32 may be made of leather
or any suitable flexible insole material and died
out or rounded to the contour of a full length 20
insole. The heel and shank piece 3s is composed
of stiff and readily moldable material such, for
example, as íiberboard or leatherboard. As
shown, the heel and shank piece 34 is shaped to
conform in lateral edge contour to the heel and
shank portion of the insole and it is tapered to a 25
feather edge at its forward end. The illustrated
shank stiffener Sii consists of a narrow strip of
resilient metal which is initially curved length
wise to correspond to the longitudinal curvature
or a plurality of tapes which may be stitched or -
of the bottom of a last.
stiifener is properly located relatively to the heel
and shank piece and is secured to it before the
latter is assembled with the insole.
secured by means of cement to both the upper
and lower flaps or layers of the insole and the
Preferably, the shank o
latter, together with the reinforcing piece, are
In order to provide upper and lower insole
members or layers in the heel and shank portion
of the insole between which to insert the rein
molded to adapt the insole unit to fit the bottom
of a last. The arrangement of the reinforcing
piece and the shank stifiener between upper and
lower layers or flaps of the insole is such that
neither the reinforcing piece nor the shank stiff
ener is exposed at the lower or lasting side of the
forcing piece and the shank stiffener, the insole
is split lengthwise from its rear extremity for
wardly to a location in the vicinity of the ball
line into upper and lower flaps ¿iii and 132, respec
tively, which are integral with the forepart of the
insole. Before the reinforcing piece and the
insole unit so as to interfere with the securing
of an effective cement bond between the over
shank stiifener are assembled with the insole the
and uninterrupted from heel to toe so that a
upper and lower sides of the reinforcing piece
are coated with adhesive, such for example as
rubber latex, and a coat of similar adhesive is
applied to the inner surfaces of the upper and
lower insole ñaps ¿lll and d2. After the adhesive
coatings have set suiiìciently to render them
sock lining may be dispensed with entirely.
This
tacky the reinforcing piece with shank stifîener
is a particularly desirable condition in cases
where the insole is made of leather inasmuch as
secured thereto, as, for example, .by means of
tacks 38, is inserted between the upper and lower
insole members or flaps lill and #i2 and the edges
of the reinforcing piece are alined with the cor
the grain surface of the leather will be exposed
Cu Ll to view throughout the full length of the insole
inside of the shoe, thus adding substantially to
the appearance of the shoe.
The invention will now be explained with refer
ence to the accompanying drawing, in which
60
Fig. 31s a sectional view taken along the line
IÍI-III of Fig. l;
otherwise secured to the lower or lasting side of
the insole. Preferably the shank stilfener is se
cured to the reinforcing piece and the latter is
lasted upper margins of the insole. Moreover,
the arrangement is further such that the upper
or foot-engaging side of the insole is left in nor
mal condition, its upper surface being continuous
C I)
thereof;
Fig. 1 is a perspective view of my improved
responding edges of the insole flaps. Alternative
ly the shank stiñener 3G may have its opposite
end portions inserted through apertures in the
lower insole member or ñap (i2, as indicated in
Fig. 2.
Thereafter', the assembled parts of the 60
2
2,090,776
insole unit are subjected to molding pressure
which secures the reinforcing piece to the insole
flaps and molds the reinforcing piece and the ad
jacent portions of the insole both longitudinally
and transversely to adapt them to conform to
the corresponding curvatures of the bottom of a
last. Advantageously the molding may be ef
fected by the use of molding forms which may be
incorporated in a molding machine, such as that
O disclosed in United States Letters Patent No.
2,065,465, granted December 22, 1936, in the name
of the present applicant.
Either before or after the parts of the insole
unit have been secured together and molded the
5 insole may be channeled to provide upon its lower
surface a channel flap which is adapted to be
raised and set in position to constitute a lasting
lip dil. Preferably, however, in order to avoid
any interference with the above-mentioned mold
0 ing operation, the channel flap will not be raised
until after the insole has been molded. The op
stiff heel and shank reinforcing piece interposed
between said layers and secured thereto by means
of cement, and a resilient shank stiffener secured
to the lower side of said heel and shank piece.
4. A shoe bottom unit comprising an insole 15
split along the heel. and shank portions to` pro
vide upper and lower` sole members, a stiff rein
forcing piece for the heel and shank portions of
the insole located between said members and
posite lateral edges along the shank portion of
versely, and a longitudinally arched shank stilf
ener located between said reinforcing piece and
bevel being such as to blend with the profile of
the last.
Instead of forming a lasting lip integrally with
the substance of the insole it may be desirable to
one of said sole members.
5. A shoe: bottom unit comprising an insole
As shown in Fig. 5, strips of tape 50 may be se
cured by means of suitable fastening devices, such
as stitches 52, to the insole 320, the stitches pass
ing also through the reinforcing piece in the
shank portion of the unit. As indicated, the
tapes may be stitched along their central median
lines and later the portions of the tapes at the op
posite sides of the stitches raised and if desired
cemented together to provide an upstanding lip.
40 It will be appreciated that the reinforcing piece
`and the shank stiffener in the above-described
Cl
insole unit are so disposed that they cannot in
55
3. A shoe bottom unit comprising a relatively
flexible insole divided along its heel and shank
portions intol upper and lower layers, a relatively 10
the unit, as herein shown, have been reduced so
as to provide beveled surfaces 46, the angle of the
O side of the insole to constitute the lasting lip.
50
piece.
adhesively secured thereto, the shank portions of 20
said insole members andy said reinforcing piece
being arched both longitudinally and. trans
secure a tape or a plurality of tapes to the lower
45
2. A shoe bottom unit comprising a relatively
flexible insole divided along its heel and shank
portions into upper and lower layers, a relatively
stiff heel and shank reinforcing piece secured to
the insole between said layers, and a resilient
shank stiffener secured to said heel and shank
terfere with the operation of cement lasting the
upper and that, particularly in cases where the
insole is composed of leather, the obtaining of a
satisfactory cement bond between the upper and
the insole is insured on account of the fact that
a leather surface of ample width is provided for
the reception of the lasting cement even along the
shank portions of narrow shank shoes. More
over, the disposition of the reinforcing piece and
the shank stiffener is further such as to permit
the formation of a continuous lasting lip along
the shank and forepart of the lower side of the
insole while, at the same time, leaving the upper
side of the insole entirely uncovered in its heel
and shank portion so as to improve the condition
and appearance of the inside of the shoe.
Having described my invention, what I claim
6 o as new and desire to secure by Letters Patent of
the United States is:
l. A shoe bottom unit comprising an insole
having its heel and shank portion divided into
upper and lower members formed integrally with
6 5 the forepart of the insole, a heel and shank rein
forcing piece interposed between said members
and secured tothe insole, said reinforcing piece
being stiffer than the insole and being coextensive
with said divided insole members, and a shank
70 stiifener associated with said reinforcing piece
and located between the latter and one of saidV
members.
having a continuous lasting lip extending along
the lower side of its shank and forward portions
and havingy its heel and shank portion divided
into upper and lower layers integrally connected
at their forward extremities with said forward
portion, a heel and shank` reinforcing piece inter
posed between said layers and secured to both
layers by means of adhesive, and a shank stiffener
secured to said reinforcing piece.
ce Li
6.r A shoe bottom unit comprising an insole
having its heel andy shank portion divided into
upper and lower members which are formed in
tegrally with the forepart of the insole and hav
ing a lip extending along` the forepart of the
insole and along the shank portion of said lower
member and formed integrally with said parts of
the insole, and a heel and shank reinforcing piece
and a shank stiifener located between said upper
and lower members.
'7. A shoe bottom unit comprising an insole
having a heel and shank reinforcing piece and a
shank stiflener located between integrally con
nected upper andlower heel and shank members
of the insole, and a tape secured to the insole 51)
and so located as to provide a lasting lip ex
tending along the shank vportion and the forepart
of the insole.
8.. A shoe bottom unit comprising an insole
having aheel and shank reinforcing piece and a
shank» stiffener located between integrally con
nected upper and lower heel and shank members
of the insole, and a tape secured to the insole
in the forepart of the unit and-to the insole
andthe reinforcing piece in the shank portion
of the unit to constitute a lasting lip.
9.`~ A shoe bottom unit comprising an insole
havingv a heel` and shank reinforcing piece and a
shank stiifener located between integrally con
nected upper and lower heel and shank members
of the insole, and a tape stitched along its central
median line to the shank portion and forepart
of the insole and having its portions at opposite
sidesr of the stitching raisedv into positions to
constitute a >lasting lip.,
JOHN M. WHELTON.
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