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Патент USA US2113802

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.April l2, 1938.
'
H. vALDlsERRi
SHOE SHANK CEMENTING PRESS
Filed March 22, 1937
BY
I
2,113,802
2,113,802
Patented Apr. 12,'.1938
UNITED s'mfriask PATENT OFFICE
2,113,802
SHOE. SHANK CEMENTING PRESS
Herman Valdiserri, Denver, Colo.
Application March 22, 1937, Serial No. 132,186
8 Claims. (Cl. 12_33)
central guide rod I3 and two spring tubes III, all
This invention relates to a shoe shank cement
ing press, for cementing the shank portions of
half soles to the insteps of shoes.
m
The principal object of the invention is to
’5 provide a simple, highly e?cient device which
can be quickly adapted for use upon shoes of
any style or size, and which will eiîectively clamp
the shank portion of a sole to the instep while
_Y the cement thereon is setting, so as to firmly and
10 securely attach th-e sole at the shank as a prelimi
nary to stitching.
Other objects of the invention are: to provide
a last which will automatically expand to accom
“ modate itself to shoes of various sizes; to provide
l5 a clamp which can be set at any position through
out the length of a shoe to clamp any portion of
the sole for any purpose; to provide an electrilcal
ly heated clamp which can be used for vulcaniz
ing or setting the cement; to provide a clamp
which can be quickly and easily attached or re
moved from the last; to provide a clamp which
will actuate pins for securing the sole to the in
step so that it cannot slip in the cement thereon
while the clamp is being tightened.
Other objects and advantages reside in the de
25
tail construction of the invention, which is de
signed for simplicity, economy, and efliciency.
These will become more apparent from the follow
ing description.
In the following detailed description of the-in
vention reference is had to the accompanying
drawing which forms a part hereof.
Like
numerals refer to like parts in all views of the
drawing and throughout the description.
35
In the drawingz-
y
Fig. 1 is a side elevation of the improved shoe
shank cementing press.
Fig. 2 is a horizontal section therethrough,
taken on the line 2_2, Fig. l.
40
Fig. 3 is a cross section, taken on the line 3_3,
Fig. 1.
~
ï
Fig. 4 is a detail longitudinal section through
the heating element.
Fig. 5 is a cross section through the heating ele
45 ment.
Fig. 6 is a detail section through the press mem
ber, taken on the line 6_6, Fig. 2.
Fig. 7 is a bottom View, looking upward, of the
clamping member.
Fig. 8 is a detail side view of the clamping mem
50
ber illustrating the ñexing action of the bottom.
A typical last post is indicated at I0. The in
vention comprises an expansion last consisting
of a heel portion I I and a toe portion I2. The toe
portion is supported from the heel portion upon a
of which slide in respective bearings in the heel
portion II.
In each of the spring tubes I4 is a compression
spring I5. These springs constantly urge the 5
toe portion forwardly away from the heel portion.
The maximum extension is limited by means of a
head I -I on the rear extremity of the guide rod I3.
The heel portion of course has the usual socket m
for the reception of the last post.
The clamping portion of the device comprises
an L-shaped yoke member I6 having a depending
leg I8. At the opposite side of the yoke member
a similar leg I9 is hinged upon a suitable hinge
bolt 20. The leg members I3 and I9 are notched
adjacent their lower extremities to engage a bail
member 2|.
-
The bail member 2| consists of a relatively
stiff metallic rod, the extremities of which are
passed into the opposite extremities of a bearing N) O
sleeve 22 in the heel portion of the last. The sides
of the bail extend along each side of the last, and
are prevented from swinging upwardly by means
of a pressure bar 23 which vextends from side to
side beneath the toe portion I2. The member 25
23 can be slid along the bail so that it may be
positioned at any desired point thereon. The
upper face of the pressure bar 23 is provided with
suitable padding 24 and the `entire bar is covered
by means of a suitable soft cover such as kid.
A threaded clamp shaft 26 is threaded down
30
wardly through the yoke I6. The upper extremity
of the shaft 25 forms a hand crank 2l. The lower
extremity of the shaft supports a clamp box 28v
having slotted ears .29 which guide it upwardly oO CIL
and downwardly along the legs I8 and I9. The
box 28 is suspended from a flange 30 on the bot
tom of the shaft 25, and is formed with an open
bottom.
.
'
A heating element housing 3i is positioned in 40
the housing 28 and secured therein by 'means of a
suitable set screw 32. The remainder of the hous
ing is packed with suitable heat insulation such as
asbestos 33.
'I'he bottom of the housing is closed by means of
a iiexîble metal plate 34 which is covered by a
relatively thick rubber pad 35. A pair of sharp
ened pins 36 extend downward from the plate 34
through the pad 35.
The plate 34 is secured to the housing 3| only 50
at its middle, by means of suitable attachment
screws 31, so that the ends of the'plate may be
flexed downwardly by means of pivoted blocks 4I
when it is desir-ed to exert pressure against a
curved sole. An electrical heating element 38 is 55
2
2,113,802
contained within the element housing 3l and
supplied with current through suitable con
ductors 39 from any convenient attachment plug
40.
Operation
Normally the clamp yoke I6 and all of its ap
10
purtenancesv are removed from the last, and the
bail 2l is swung downwardly. The toe of the shoe
is slipped over the toe portion I2 and the latter
is pressed rearwardly toward the heel portion I I
compressing the springs I5. The heel of the shoe
is then slipped over the heel portion II, thus
holding the springs under compression. The bail
2I is now lifted and the pressure bar 23 is ad
15 justed to come under the toe portion I2, as shown
in Fig. l.
The ñxed leg I8 is now engaged with one side
of the bail and swung over the shoe. The other
leg I9 is then engaged with the other side of the
20 bail, as shown in Fig. 3. The half sole with its
cement in place is positioned in its proper posi
tion, and the crank 21 is rotated to bring the clamp
box downwardly against the sole. The upward
pull of the clamp upon the bail is absorbed by
25 the pressure of the member 23 against the shoe.
The points 36 ñrst enter the sole so that it can
not move relative to the clamp. When the sole
is brought to accurate position further tighten
ing of the clamp will cause these points to pierce
30
the instep so that the sole is firmly locked in
place.
The clamp is now given the final tightening to
clamp the sole firmly to the instep throughout its
35
entire width so that the cement will be spread
over the gripping surface. Heat is now applied
through the heating element to heat and dry
the cement.
After the cement is dried, the screw shaft 26
is loosened, the leg I9 is unhooked from the bail,
40 and the clamp removed.
The bail is now swung
downwardly, the toe portion I2 pressed inwardly,
and the shoe removed with the sole cemented in
place thereon, ready for stitching.
While a speciñc form of the improvement has
45 been described and illustrated herein, it is desired
to be understood that the same may be varied,
within the scope of the appended claims, without
departing from the spirit of the invention.
Having thus described the invention, what is
50 claimed and desired secured by Letters Patent
isz-«
1. A shoe shank press comprising: a last; a
bail pivoted to said last and extending along each
side thereof; a crossmember extendingbetweenthe
55 opposite sides of said bail beneath said last to
prevent upward movement of said bail; a clamp
ing yoke extending from opposite sides of said
60
bail over said last, said clamping member, and
said cross member being slidably mounted on said
bail so that they may be moved to any desired
position therealong.
2. A shoe shank press comprising: a last; a bail
pivoted to said last and extending along each side
65 thereof; a cross member extending between the
opposite sides of said bail beneath said last to pre
vent upward movement of said bail; a clamping
yoke extending from opposite sides of said bail
over said last; a pressure plate in said clamping
member; a threaded shaft for forcing said pres
sure plate downwardly toward said last; and an
electrical heating element adjacent said pressure
plate.
3. A shoe shank press comprising: a last; a
ball pivoted to said last and extending along each
side thereof; a cross member extending between 10
the opposite sides of said bail beneath said last
to prevent upward movement of said bail; a
clamping yoke extending from opposite sides of
said bail over said last; a hollow clamp box slid
able in said yoke; an electrical heating element 15
mounted within said box; and means for forcing
said box downward against said last.
4. A shoe shank press comprising: a last; a
bail pivoted to said last and extending along each
side thereof; a cross member extending between 20
the opposite sides of said bail beneath said last
to prevent upward movement of said bail; a
clamping yoke extending from opposite sides of
said bail over said last; a hollow clamp box slid
able in said yoke; an electrical heating element 25
mounted within said box; means for forcing said
box downward against said last; a ñexible bottom
plate on said box; and means for flexing said
bottom plate to impart a curvature thereto.
5. A shoe shank press comprising: a last; a 30
bail pivoted to said last and extending along each
side thereof; a cross member extending between
the opposite sides of said bail beneath said last
to prevent upward movement of said bail; a
clamping yoke extending from opposite sides of 35
said bail over said last; a hollowV clamp box slid
able in said yoke; an electrical heating element
mounted within said box; means for forcing said
box downward against said last; and sharpened
pins projecting downwardly from said box.
40
6. A shoe shank press comprising: a last; a
bail pivoted to said last and extending along each
side thereof; a cross member extending between
the opposite sides of said bail beneath said last
to prevent upward movement of said bail; a 45
clamping yoke extending from opposite sides of
said bail over said last; and a hinged leg on said
yoke which may be swung to and 'from engage
ment with said bail.
7. A shoe shank press comprising: a last; hori 50
zontal members pivoted to and extending along
each side of said last; a clamping yoke extending
from said members over said last; a pressure plate
in said clamping yoke; an electrical heating ele
ment for heating said plate; and means in said 55
yoke for forcing said plate toward said last.
8. A shoe shank press comprising: a last; hori
Zontal members pivoted to and extending along
each side of said last; a clamping yoke extending
from said members over said last; a pressure plate 60
in said clamping yoke; an electrical heating ele
ment for heating said plate; means in said yoke
for forcing said plate toward said last; and means
for flexing said plate to impart a desired curva
ture thereto.
HERMAN VALDISERRI.
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