Improvements in Skiving Machines used in the Manufacture of Boots and Shoes.
Year: 1894

page_text: Date of Application, 19th Nov., 1894
Complete Specification Left, 17th Aug., 1895-Accepted, 28th Sept., 1895
PROVISIONAL SPECIFICATION.
Improvements in Skiving Machines used in the Manufacture of
Boots and Shoes.
We CHARLES HENRY DALE and FREDERICK JAMES DALE, trading as
H. & F. Dale, of Newarke Street, Leicester, Boot and Shoe Engineers, do
hereby declare the nature of this invention to be as follows:-
This invention has reference to machines for skiving or reducing the thickness
of leather employed in the manufacture of boots and shoes, and is designed chiefly
with a view of producing a machine which will automatically skive the edge of a
curved piece of leather, such for example as a sectional lift.
Heretofore, these sectional lifts, which in their most common form are U shaped,
have had their inner edges skived by hand, as the skiving machines at present in
use are not adapted for skiving the inner edges of curved pieces of leather, such as
the sectional lifts mentioned.
The machine to be described and forming the subject of the present invention
will not only perform the operation referred to, but will automatically guide the
curved piece of leather or sectional lift to the knife without any assistance from
the operator.
According to this invention, a preferred construction of skiving machine, may
embody in a suitable framing, a positively driven feed roller and a roller, loose on
its axle but revoluble frictionally by contact with the sectional lift, when the latter
is placed between the said two feed rollers to be submitted to the action of the
skiving knife.
At the side and in close proximity to the feed rollers is a guide pin, post or
equivalent device, in contact with which the sectional lift moves during the
operation of skiving. The said device may preferably be provided with an
antifriction roller.
Any suitable knife may be employed, but a knife adjustable in the manner set
forth in our prior Patent No. 10035 of 1893, is preferred.
In lieu of the loose or frictionally driven roller we may use a fixed or
non-revoluble roller or a table having a horizontal or curved surface; these
modifications however, while suitable for some kinds of material are not attended
with such generally good results as the means hereinbefore mentioned.
Dated this 19th day of November 1894.
W. P. THOMPSON & BOULT,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Skiving Machines used in the Manufacture of
Boots and Shoes.
We CHARLES HENRY DALE and FREDERICK JAMES DALE, trading as
H. & F. Dale, of Newarke Street, Leicester, Boot and Shoe Engineers, do
hereby declare the nature of this invention and in what manner the same is to be
Price & I
.....

page_text: performed to be particularly described and ascertained in and by the following
statement:-
This invention has reference to machines used principally in the manufacture of
boots and shoes for the purpose of skiving, splitting or reducing the thickness of
leather employed therein.
The said invention is designed with the object of producing a machine or of
embodying improvements therein, by means of which a curved piece of leather,
such for example as a sectional heel lift, may have its edge automatically skived or
reduced in thickness.
Prior to this invention it has been usual, as far as we are aware, for an operator
to skive by hand the inner edge of these sectional heel lifts, which in their most
common form are U shaped, as the skiving machines at present in use are not
adapted for skiving or bevelling the edges of curved pieces of leather which the
designation sectional lift" is hereinafter intended to include.
The invention to be described embodies as its essential feature a device around
or in contact with which a sectional lift may automatically move or be self-guided,
i.e., without assistance from the operator, during the time the edge of the sectional
lift is being bevelled by the skiving knife of the machine.
Referring to the accompanying drawings Figure 1 is a plan, Figure 2 is an end
elevation and Figure 3 a front elevation of so much of a leather skiving machine
as is necessary to illustrate the invention.
AA represent the usual feed rollers of a skiving machine between which the
sectional lift is placed and thereby presented to the bevelling knife B which by
preference is adjustable in the manner set forth in the Specification of our prior
Patent No. 10035 of 1893.
The said feed rollers are mounted upon the ends of shafts A2 A3 driven by
gearing in the ordinary manner, but in a modification one only of such rollers need
be positively driven, the other being loose on its axle and revoluble by frictional
contact with the sectional lift when such is placed between the rollers to be
submitted thereby to the action of the knife B.
C represents a device, which, after considerable experimenting, has proved
successful in effecting the automatic guidance of a sectional lift while passing
between the feed rollers and so that the edge of the said sectional lift becomes
equally and uniformly bevelled or skived by the knife B.
This device in its preferred construction consists of a guide pin with a curved or
cylindrical surface located against the facial side of the feed rollers and opposite to
the passage between the latter so that as the sectional lift is passing through them
the said device forms a centre around and in contact with which the said lift moves
during the operation of skiving.
The guide device is formed on the upper end of a flat bar D fixed by a screw D¹
to any convenient part of the framing of the machine, or the said device may be
fixed in position in any other suitable manner.
In some cases we may substitute a roller or revoluble curved surface for the
fixed cylindrical body C.
In actual practice to skive or bevel the inner edge of a sectional lift it is only
necessary for one end of the latter to be placed between the feed rollers with its
said edge against the device C when the feed rollers will conduct it to the bevelling
knife and the said device C will form a point or centre around which the
said lift will automatically move while its inner edge is being bevelled by the
knife.
After being placed between the feed rollers the sectional lift requires no further
attention from the operator while the process of skiving is being performed, he is
therefore entirely free to get a further lift in readiness, any intervals in the
feeding being thus avoided and the productive capacity of the machine thereby
increased.
The invention is not limited to the particular construction of guide device shown
and described and in lieu of a loose or frictionally driven feed roller we may

page_text: employ a fixed or non-revoluble roller or a table having a curved or horizontal
surface, these modifications however while suitable for some kinds of material are
not attended with such generally good results as the means hereinbefore mentioned
and illustrated in the accompanying drawings.
Although the invention has been herein described as applicable for skiving the
edge of a curved piece of leather it is obvious that by altering the knife from an
angular to a horizontal position, it is equally applicable for splitting the said
leather.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:-
1. A machine constructed in such a manner as to automatically split or bevel a
curved piece of leather or the like.
2. The combination in a machine of the character described of means for
automatically guiding a curved piece of leather during the operation of splitting
or bevelling.
3. In a machine of the character described the combination with the feed rollers
or their equivalent of a device around or in contact with which a curved piece of
leather may move during the operation of splitting or bevelling.
4. In a machine of the character described the combination with the knife and
the feed rollers or their equivalent of a fixed or revoluble curved surface against
which a curved piece of leather may move while being bevelled or split substan-
tially as described.
5. In a machine of the character described the combination with the knife and
the feed rollers or their equivalent of a device such as C or its equivalent substan-
tially as described and illustrated in the accompanying drawings.
6. The improved machine substantially as and for the purpose described and
illustrated in the accompanying drawing.
Dated this 16th dow of Auan 100%
Witness-
E. N. LEWIS,
CHARLES HENRY DALE.
FREDERICK JAMES DALE.
Boult & Wade,
Berridge Street Chambers, Leicester.
Agents for the Applicants.