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Патент USA US2115810

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May 3, 1938.
Filed March 6, ~1935 ,
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Patented May 3, 1938
Henry B. German. Lynchburg, Va., assignor to
Compo Shoe Machinery Corporation, New York,
- N. Y., a corporation of Delaware
Application March 6, 1935, Serial No. 9,601
2 Claims.
(Cl. 12-142)
This invention relates to the manufacture of
cemented shoes, and more particularly to the
manner of bonding the outsole of such a shoe to
the upper.
A general object of the invention is to provide
an improved cemented shoe structure wherein
any tendency of the outsole to peel away from the
upper is circumvented.
A further object is to provide an improved out
10 sole for cement attachment to a lasted upper.
Another object is to provide a method of pre
venting the outsole of a cemented shoe from peel
ing away from its upper.
Yet another object is to provide a cemented
15' shoe having a stronger, more permanent bond
between the outsole and upper.
Other objects of the invention will in part be
obvious and will in part appear hereinafter.
The invention accordingly comp-rises the sev
2 O eral steps and the relation of one or more of such
steps with respect to each of the others, and the
article possessing the features, properties, and
the relation of elements, which are exempli?ed
in the following detailed disclosure, and the scope
of the application of which will be indicated in
the claims.
For a fuller understanding of the nature and
objects of the invention reference should be had
to the following detailed description taken in con
30 nection with the accompanying drawing, in
Fig. 1 is a perspective view of an outsole em
bodying the principles of the present invention;
altering the direction of the application of the
separating force which is exerted when the edge
of the sole is pressed downwardly away from the
Fig. 2 is a fragmentary transverse sectional
view across the forepart of a shoe to which the
outsole of Fig. 1 has been attached.
In the manufacture of cemented shoes the out
sole is united to the bottom of the lasted‘ upper
by means of cement which is usually pyroxylin
cement but may be of any other suitable kind.
Pyroxylin cement forms a ?rm tenacious bond
between the shoe parts which cannot be pulled
apart by a direct pressure acting more or less
perpendicularly to the plane of the bond. How
ever, in some cases where the extension edge of
cemented shoes is subjected to severe down
ward knocking or scuffing, there may ensue a
peeling action which peels the outsole away from
the upper to which it is cemented. That is, the
cemented bond may sometimes be peeled or split
apart where it could not ordinarily be directly
pulled apart. In accordance with the present in
vention, this peeling separation of the outsole
55 from the upper is circumvented by de?ecting or
Referring more particularly to the drawing,
there is shown’an outsole II) which may be made
of any suitable sole stock. In fact, the bond ob-.
tained by following the principles of the present
invention is so much stronger than those hereto;
fore available that even "coarse inferior grades of '
leather such as belly leather, may be used with _
improved tenacity between the‘ shoe parts,‘ al
though‘ a'superior joint is assured‘when leathers .
of the commonly employed quality are used. The
outsole I0 is rounded to‘ any desired 5126,3116. is 115
given any of the usual desired operations prior
to cement a?ixing it to the upper, such as shank
ing it out and roughing its marginal portion to
which cement is to be applied.
In‘accordance with the present invention, the 26
sole is provided with a channelor incision I I
which extends around a marginal portion‘thereof
and runs downwardly into the sole stock from its
?esh side. The primary function of this channel
is to weaken the sole so that its edge portion may‘
flex downwardly away from its body portionso
as to alter the effective direction of a force ap
plied downwardly against the top edge of the
sole after it is cemented to the shoe. This will
be more apparent upon considering the shoe 05 0
structure illustrated in Fig. 2, which comprises
an insole I2 to which an upper I3 is overlasted
in the conventional McKay relationship except
that its overlasted allowance M is preferably at
tached to the insole by cement indicated at I5.
However, the particular method of lasting the
upper and insole makes no essential difference
with respect to the principles of the present in
vention, so long as the outsole ultimately is ce
ment bonded to the lasted upper. In the form.
of shoe particularly illustrated in Fig. 2, a filler I 6
is applied between the inturned edges of the last
ing allowance and the outsole III is affixed thereto
by a layer of cement I1, preferably pyroxylin ce
ment, which is located between the marginal por
tion of the sole and the inturned lasting allow
Channel II is extended downwardly and in
wardly into the sole stock to a depth which‘ is
preferably at least half the thickness of such
stock, or at any rate to such a depth that it fa
cilitates downward flexure of the edge of the sole
with respect to its central body portion. Some
of the cement I'I seeps into channel I I and serves
normally to hold it closed.
However, the cement within channel H does
not hold this channel closed with the same tenac
ity as the main body of cement holds the outsole
to the upper. That is, when a force such as that
indicated at F is applied to the edge of outsole,
such edge ?exes downwardly, opening the chan
nel ll. Once this channel pulls open, the force
F, which tended to peel the bond at H, becomes
applicable to such bond along a component in
dicated at F’. When the channel II is down
wardly and inwardly directed, it will be seen that
the force F must be transmitted around the thin
?exed stock at l8 to a vicinity located within the
point I9 where the channel H meets the ?esh
surface of the sole. In other words, the peeling
effect of force F is altered to the direct pulling
effect of force F’ because of the opening of the
gap at H. In practice, the opening I!) of the
channel is located about 5-2 of an inch inwardly
from the outermost boundary‘ 2!] of the cemented
area, so that the peeling action exerted by force
F can only continue for this F3§ of an inch, after
which the channel pulls open and further exer
tion of the force must act directly downwardly
against the adhesion of cement ll. This effec
tively circumvents continued peeling of the sole
away from the upper which would render the
shoe un?t for wear, and substitutes a relatively
harmless local ?exure of the edge portion of the
30 sole. This edge portion is adaptedto move back
into position as soon as the force at F is removed.
The channel H may be extended around any
desired marginal part of the outsole, being shown
in Fig. l as extending around the forepart there
35 of, which is the preferred form. However, it may
be extended along the shank and even into the
heel portions if desired. This channel may be ap
plied at any suitable time during the manufac
ture of the outsole, either before or after any of
40 the usual operations, such as shanking, roughing,
cementing, etc., and it may be made in any suit
able manner, as for example by means of con
ventional channeling machines having a special
knife, or having a conventional knife adjusted to
45 the required angle.
As explained, the channel
preferably extends downwardly and inwardly in
order to transfer the effect of downward scuf?ng
forces to an area located well within point l9 at
which the peeling action stops. However, it is
contemplated that this channel my extend in any
desired direction so long as the edge portion of
the sole is weakened so as to permit downward
?exure thereof in a manner which circumvents or
retards a peeling separation of the outsole and
55 upper.
It will be appreciated that in the drawing, the
size and relationship of the parts has been ex
aggerated better to show the described non-peel
ing action.
It will be seen that in accordance with the. pres
ent invention, kicking and scu?ing forces applied
to the edge of the outsole of a cemented shoe can
not be effective to peel or pry the sole away from
the upper and that a stronger and more perma
nent attachment between these shoe parts is as
Since certain changes in carrying out the above
method, and certain modi?cations in the article
which embody the invention may be made with
out departing from its scope, it is intended that
all matter contained in the above description or
shown in the accompanying drawing shall be
interpreted as illustrative and not in a limiting
It is to be understood that the following claims
are intended to cover all of the generic and spe
ci?c features of the invention herein described,
and all statements of the scope of the invention
which, as a matter of language, might be said to
fall therebetween.
Having described my invention, what I claim as
new and desire to secure by Letters Patent, is:
1. A cemented shoe comprising an upper and,
an outsole, cement attaching said sole to said up
per, said sole having a channel extending mar
ginally around the forepart thereof, said channel
opening into the ?esh or upper surface of said
outsole along a line located only slightly within
the outer boundary of said cement, and continu
ing downwardly and inwardly into said sole 30.
whereby the extended edge of said sole at the
forepart is integrally attached to the remainder
thereof at points located inwardly beyond the
outer margin of said cemented area, said channel
forming a weakened line around the forepart 35
margin of the sole so .that said extended edge is
held against the body of the sole with less tenac
ity than the sole is held against the shoe upper
whereby downward forces applied to said ex
tended edge may permit said channel to open to 4,0.
assure transmission of such forces to said ce
mented area through said inwardly located inte
gral attachment.
2. A method of preventing the outsole of a ce
mented shoe from peeling from the upper, which
comprises weakening such outsole along a margi;
nal line near the outer boundary of the cemented
area by forming therein a weakened slit or chan
nel from its ?esh surface downwardly and in
wardly toward but not to its grain side, applying
cement to the ?esh surface of the marginal por
tion of said sole while keeping said channel
closed and excluding any save a possible slight
seepage of cement from said channel, and stick
ing said cemented sole margin to the bottom of a
lasted upper, whereby its outer edge portion be
yond said weakened channel may break down
wardly away from the body of the sole except at
its integrally connected lower portion.
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