IMPROVE- MENTS IN THE MANUFACTURE OF BOOTS AND SHOES
Year: 1884

page_text: I ISAAC BLUE HARRIS of Castle Mills Fountainbridge Edinburgh Superintendent
of Rubber Works do hereby declare the nature of my Invention for "IMPROVE-
MENTS IN THE MANUFACTURE OF BOOTS AND SHOES" to be as follows:-
These improvements relate to shoes and boots constructed with india rubber
outsoles and consist in forming said soles so that they may be more simply and
soundly attached to the leather or other material whereof the inner soles.
are made.
The most convenient mode of attachment has hitherto been effected by india
rubber solution or other suitable cement, but the best cement hitherto employed
has been found ineffective in securing a thorough adhesion of the rubber outsoles
as heretofore formed, and the supplementary attachment by sewing or stitching is
not suited to a material like india rubber.
The ineffectiveness of the attachment by the ordinary cementing process arises
entirely from keeping the edges of the rubber outsole of the same or nearly the
saine thickness as the central portions and my Invention consists in forming these
rubber soles with a margin or border of reduced thickness (from the outer surface)
and by preference this border itself of a reducing thickness so that its outer edges
may be thin. By this contrivance the adhesion of the cement at the edges will
not be overcome as it is so liable to be by a rubber sole having its edges of the
ordinary thickness throughout, for while the adhesion of the edges of the rubber
soles is maintained the cementing attachment in the central parts of the soles will
be found amply sufficient.
3
To still further add to the security of the attachment of the rubber outsole to
the leather or other inner sole of a shoe or boot, and to contribute to the prevention"
of slipping (one important object for the use of these rubber outsoles) I plant a
row of metal tacks, clips or rivets of any suitable form and kind of metal wholly
or partially round the reduced margin or border of the rubber outsole, thereby
making a metallic connection between the outer and inner soles which will not
therefore be liable to rot or give way as a sewing or stitching connection, nor so ›
liable to cut the rubber as the thread in that kind of connection.
Dated this 3rd day of January 1884
CARPMAEL & Co.,
Agents for the Applicant.

page_text: ! I ISAAC BLUE HARRIS of Castle Mills Fountainbridge Edinburgh Superintendent
of Rubber Works do hereby declare the nature of my Invention for "IMPROVE-
MENTS IN THE MANUFACTURE OF BOOTS AND SHOES and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement:-
These improvements relate to shoes and boots constructed with india rubber
outsoles and consist in forming said soles so that they may be more simply and
soundly attached to the leather or other material whereof the inner soles
are made.
The most convenient mode of attachment has hitherto been effected by india
rubber solution or other suitable çement, but the best cement hitherto employed
has been found ineffective in securing a thorough adhesion of the rubber outsoles
as heretofore formed, and the supplementary attachment by sewing or stitching is
not suited to a material like india rubber.
The ineffectiveness of the attachment by the ordinary cementing process arises
entirely from keeping the edges of the rubber outsole of the same or nearly the
same thickness as the central portions, and my Invention consists in forming these
rubber soles with a margin or border of reduced thickness (from the outer surface)
and by preference this border itself of a reducing thickness so that its outer edges
may be thin. By this contrivance the adhesion of the cement at the edges will
not be overcome as it is so liable to be by a rubber sole having its edges of the
ordinary thickness throughout for while the adhesion of the edges of the rubber
soles is maintained the cementing attachment in the central parts of the soles will
be found amply sufficient.
To still further add to the security of the attachment of the rubber outsole to
the leather or other inner sole of a shoe or boot I plant a row of metal tacks, clips,
or rivets of any suitable formi and kind of metal wholly or partially round the
reduced margin or border of the rubber outsole thereby making a metallic
connection between the outer and inner soles which will not therefore be liable to
rot or give way as a sewing or stitching connection nor so liable to cut the rubber
as the thread in that kind of connection.
In order that my said Invention may be most fully understood and readily
carried into effect I will proceed to describe the Drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a transverse section through the fore part of a shoe made in
accordance with my Invention.
A is the leather insole, and B the outsole of vulcanized india rubber.
The india rubber outsole is formed as will be seen, with a thin margin or
border B B of much less substance than the body of the sole and this thin
margin or border is itself by preference thinner at the outer edge than where it
adjoins the thicker part of the sole.
This india rubber sole may ha
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page_text: Liability to
there is no tendency for the india rubber outsole to drag away from the insole
around the outer edge and so long as the outer edge remains firmly attached there
is no fear of separation of the two soles occurring elsewhere.
Beparation of the soles commencing around the edges is a great defect in shoes as
heretofore constructed having india rubber soles attached by cement.
Figure 2 is the plan of the sole of the shoe showing the way in which I
sometimes employ metal tacks or like metallic fastenings to further secure the
connection between the leather insole and the india rubber outsole.
The tacks C C are arranged as will be seen around the thin margin of the sole.
They may be applied entirely around the sole or placed only in those parts which
are most exposed to wear.
The tacks which I employ are of copper. They are driven through the two
soles from the under side and are clenched upon an iron anvil of suitable form.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
First. A shoe having an india rubber outsole provided with a margin or
border of reduced thickness and attached to the insole by cement as herein
described.
Second. A shoe having an india rubber outsole provided with a margin or
border of reduced thickness attached to the insole by cement and further secured
by means of metal tacks or like metallic fastenings as herein described.
Dated this 2nd day of September 1884
CARPMAEL & Co.,
Agents for the Applicant.