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Jan. 7, 1947.
Fileid May V23, 1944
/72 van tor
v Patented Jan. 7, 1947
Emery R. Davis, Beverly, Mass., assignor to United
Shoe Machinery Corporation, Flemington,
NPJL, a corporation of New Jersey
Application May 23, 1944, Serial No. 536,869
4 Claims. (on. 12-38) ' .
lower layer which may be of any kind of mate
This invention relates to machines for pressing
soles on shoe bottoms and particularly to pad
covers for the pads of such machines.
rial, for example leather, having the property of
promptly recovering substantially its original
shape after distortion or, if desired, the kinds
of leather usually employed for pad covers such
as horsehide and pigskin may be used. The up
per surface of the leather I0 is covered with a
thin layer l2 made from a smooth sheet of one
of the synthetic resins above mentioned such as
Koroseal or Vinylite. As above suggested, the
leather layer, since it is not subject to abrasion,
need not be of the relatively expensive horsehide
or pigskin frequently used as pad covers but may
be of the cheaper grades of leather or other ma
_ Machines for ‘this work, particularly cement
sole attaching machines, have yielding pads
which it is desirable to protect from wear by
providing covers therefor. The cover should be
resilient so that it will immediately recover its
original shape when pressure of the shoe is re
lieved so as not to interfere with the action» of
gages movable over the surface of the cover to
engage the edge face of the sole. The cover is
to protect the pad from wear and hence should
be as durable as possible. To preserve the char
acter of the shoe bottom, the cover should have
a very smooth sole-engaging surface. The cover
terial provided they have suiiicient resiliency
promptly to recover their shape after distortion.
The layers I0 and I2 are preferably cemented
should be-waterproof since soles when attached
together throughout their opposed surfaces, any
are usually in temper. The cover should also be
suitable cement, such as that disclosed in United
unaffected by the cements used in sole attaching
or the solvent employed for activating the ce 20 States Letters Patent No. 2.323.562, granted July
61943, in the name of F. V. Nugent, being em
Objects of this invention are to provide a pad ,
The cover may be used, for example, on a pad
such as that disclosed in Letters Patent of the
cover which will ful?ll the above and other re
quirements to an extraordinary degree.
Various synthetic resins such as the vinyl res
25 United States No. 2,205,400, granted June 25,
1940, upon an application of Sidney J. Finn, and
ins now available on the market are highly re
for'that reason is shown as provided with a lo
sistant to abrasion, are waterproof and are unaf
fected by cement or cement solvents. Such res
eating stud it which may be a cylindrical shell
filled with rubber, the shell having attaching
»ins include highly polymerized and plasticized
vinyl chloride (“Koroseal”) and various copoly 30 projections I6 which are preferably embedded in
the plastic layer 12, the cylindrical portion ex—
mers of vinyl chloride and vinyl acetate (known
tending through a hole in the leather layer l0.
Having thus described my invention, what I
In order to resist without cracking the con
claim as new and desire to secure by Letters Pat
tinual bending and distortion to which a pad cov
er is subjected in use, such resins must be highly 35 ent of the United States is:
1. In a sole-attaching press having a pad for
plasticized and, when so plasticized, their recov
pressing a shoe sole, a cover for said pad com
ery after distortion is relatively slow so that un
. prising a layer of leather and a layer of polymer
der some conditions a cover entirely of plasti
ized synthetic vinyl resin on its exposed face.
cized vinyl resin is not entirely satisfactory.
2. In a sole-attaching press having a pad for
I have found that a pad cover consisting of a 40
pressing a shoe sole, a cover for said pad com
lower layer of leather and an upper layer of syn
as “Vinylite") .
I prising a layer of leather and a layer of Vinylite
on the outer face of the cover.
thetic'resin, preferably with the layers cemented
to each other throughout then-engaging surfaces,
possesses all the characteristics desired in a pad
cover. The leather promptly resumes substan
tially its original shape after distortion and there
3. In a sole-attaching press having a pad for '
45 pressing a shoe sole, a cover for said pad compris
ing a lower layer of resilient leather and an upper
fore causes prompt return of the synthetic resin
- surface also. The leather is protected by the syn
thetic resin layer from water which may be
- squeezed out of the sole under pressure and from 50
accidental contact with the cement or cement sol
vents which might otherwise be absorbed by the‘
leather and adversely affect its action as a pad
layer of synthetic polymerized vinyl resin, said
layers being caused to adhere throughout their
opposed surfaces.
4. In a sole-attaching press having a pad for
pressing a shoe sole, a cover for said pad compris
ing a lower layer of resilient material and a thin
upper layer of highly plasticized polyvinyl chlo
ride resin, said layers being caused to adhere
The drawing is a perspective view' of a pad 55 throughout their contacting surfaces.
cover embodying the present invention. -
In the drawing, the numeral Hi represents a
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