Improvements in Leather Rolling Machines.
Year: 1889

page_text: Date of Application, 31st Jan., 1889
Complete Specification Left, 31st Oct., 1889-Accepted. 7th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Leather Rolling Machines.
We EDWIN ERNEST SHELDON and ALFRED MILLS, Curriers both of Darwall Street
Walsall in the County of Stafford and JOHN MASTERS of Holts Hill Lane Walsall
aforesaid Currier, do hereby declare the nature of this invention to be as follows :-
The object of our invention is to improve the construction of leather rolling
machines and more especially the adjustinent of the table carrying the leather to be
rolled and to arrange the slide or slides above the table actuating the roller in such
a manner as to avoid danger of spoiling the leather underneath by permitting oil drops
to fall. Leather rolling machines as at present constructed commonly consist of a
roller moving to and fro above a table carried from a slide or guide driven by a
connecting rod from a crank pin. The table carrying the leather is often arranged
so as to be supported by four links two at each end forming two separate toggle
joints. Cams and levers actuated from the main shaft straighten the toggle links and
thrust the table, and with it the leather to be rolled against the roller with a pressure
determined by the leverage for which the mechanism is arranged. Sometimes
adjusting screws are arranged at the lower ends of the toggle links to raise or lower
the bottom ends and thus cause the table to be forced nearer to or farther away from
the roller and therefore to press more or less upon the leather.
Difficulties arise in using such adjustments, the chief being the possibility of
raising one end of the table nearer to the roller than the other.
In carrying out our invention we support the blocks carrying the pins through the
lower ends of the toggle links upon inclined pieces and arrange a rack or screw to
simultaneously move two wedges underneath these inclined pieces.
We move the rack by means of a pinion gearing into it or a screw and a wheel or
lever. The positions of the lower ends of the toggle joints are simultaneously
changed so that whatever change may be necessary in the adjustment of the table as
to height is made without altering the parrallelism between the plane of the table and
the path of the roller. Similar set adjusting wedges are placed between the table
and the frame carried upon the upper ends of the toggle links. The object of toggle
links is to alternately press the leather against the roller and release it to allow of
change in position or withdrawal, generally the pressure is arranged to be kept up
during the whole of one stroke of the roller and taken off during the return stroke.
Oil is found to damage leather very much and we arrange under the slide carrying
the roller a movable trough fixed to it and moving to and fro with it so that any oil
from the slide is caught by this trough and discharged into a suitable receptacle clear
of the leather.
By using our invention the pressure of the roller upon the leather may be
increased or diminished at will and while the machine is in action and oil is
prevented from damaging goods while undergoing the rolling process.
Dated this 30th day of January 1889.
MARKS & CLERK,
Agents for Applicants.
Agents for Applicants.
COMPLETE SPECIFICATION.
Improvements in Leather Rolling Machines.
We EDWIN ERNEST SHELDON and ALFRED MILLS, Curriers both of Darwall Street
Walsall in the County of Stafford and JOHN MASTERS of Holts Hill Lane, Walsall,
aforesaid currier, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement:-
The object of our invention is to improve the construction of leather rolling

page_text: machines and more especially the adjustment of the table carrying the leather to be
rolled, and to arrange the slide or slides above the table actuating the roller in such
a manner as to avoid danger of spoiling the leather underneath by permitting oil
drops to fall. Leather rolling machines as at present constructed commonly consist
of a roller moving to and fro above a table carried from a slide or guide driven by a
connecting rod from a crank pin. The table carrying the leather is often arranged
so as to be supported by four links two at each end forming two separate toggle
joints.
Cams and levers actuated from the main shaft straighten the toggle links and
thrust the table, and with it the leather to be rolled against the roller with a pressure
determined by the leverage for which the mechanism is arranged.
Sometimes adjusting screws are arranged at the lower ends of the toggle links to
raise or lower the bottom ends and thus cause the table to be forced nearer to or
farther from the roller and therefore to press more or less upon the leather.
Difficulties arise in using such adjustments, the chief being the possibility of raising
one end of the table nearer to the roller than the other.
In carrying out our invention we support the blocks carrying the pins through
the lower ends of the toggle links upon inclined pieces and arrange a rack or screw
to simultaneously move two wedges underneath these inclined pieces.
We move the rack by means of a pinion gearing into it or a screw and a wheel
or lever. The positions of the lower ends of the toggle joints are simultaneously
changed so that whatever change may be necessary in the adjustment of the table as
to height is made without altering the parallelism between the plane of the table and
the path of the roller.
Similar set adjusting wedges are placed between the table and the frame carried
upon the upper ends of the toggle links. The object of toggle links is to alternately
press the leather against the roller and release it to allow of change in position or
withdrawal generally the pressure is arranged to be kept up during the whole of one
stroke of the roller, and taken off during the return stroke.
Oil is found to damage leather very much and we arrange under the slide carrying
the roller a movable trough fixed to it and moving to and fro with it, so that any
oil from the slide is caught by this trough and discharged into a suitable receptacle
clear of the leather.
By using our invention the pressure of the roller upon the leather may be increased
or diminished at will and while the machine is in action and oil is prevented from
damaging goods while undergoing the rolling process.
In order that our invention may be fully understood and readily carried into
effect we append hereunto a sheet of explanatory drawings which we shall now
describe.
Figure 1 is a side elevation a leather rolling machine to which our improvements
have been applied. Figure 2 is an end elevation and Figure 3 is a plan showing the
lower table adjusting mechanism with the upper screw and table removed while
Figure 4 is a plan of the upper adjusting mechanism with the table removed.
The machine resembles other leather rolling machines in that the wheel A is driven
by belt or separate engine and its revolution causes the roller B carried on suitable
framing and guides to travel to and fro over the table C by means of the connecting
rod D. The periodic raising and lowering of the table by means of the toggle
levers E E, F F, and the wrist plate G and rods H, I, together with the long rod J,
lever K and cam and roller L is also well known and commonly applied. Our
invention consists in the application of novel contrivances for changing the level of
the table which are shown in elevation at Figure 1.
Two wedges M M inclined in opposite directions act upon wedge surface N, N,
fixed under the upper table and are firmly fastened to the lower portion of the table
which is mounted upon the upper ends of the toggle levers E E and F F as seen.
A long right and left hand screw with a hand wheel P passes through these
wedges and is held stationary so far as movement in the direction of its length is
concerned by suitable collars attached to the table.

page_text: When the hand wheel P is rotated the wedges move in opposite directions and the
upper part of the table is thereby raised or lowered to any desired proximity to the
roller B independantly of the lower adjusting arrangement. The level of the table
can thus be adjusted to exactly allow for any thinning of the wood covering of
the table. The wedges M M each contain two surfaces M M' as seen in the plan at
Figure where also the long screw O and the hand wheel P are visible as the
upper part of the table is supposed to be lifted off. This constitutes the upper table
adjusting arrangement and it is provided to change the level of the table when a
considerable adjustment is required from any cause or when the machine is at rest.
The lower adjusting arrangement is intended to raise or lower the table bodily so
as to bring it nearer to or further from the roller B in order to deal with different
thicknesses of leather or to give greater or less pressure as desired.
It consists of a rack Q having wedges RS at its extremities of the same angle
and direction as shown. These wedges carry the guided blocks T U to which are
pivotted the toggle-links E E, F F. The under surfaces of these blocks are also
wedge shaped and as the blocks are not free to move horizontally, when the hand
wheel V is rotated in one direction the pinion wheel W moves the rack Q and the
wedges simultaneously lift the blocks and so cause the table to approach nearer to the
roller. At the same time the plane of the table remains parallel to any plane to
which it has been set to coincide with the movement of the roller. The opposite
movement of the wheel V lowers it.
The arrangement for preventing oil dropping from the sliding piece carrying the
roller B is shown in Figure 2 and it consists of two grooves or troughs a, b, inclined
towards an oil trough Figure 1 which collect all excess oil from the sliding piece d
and prevent any drip upon the leather beneath.
C
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the saine is to be performed we declare that what
we claim is.
I. In a leather rolling machine the use of adjusting wedges such as M, M, with
a screw such as O for varying the level of the table substantially as, and for the
purpose herein before described and illustrated in the accompanying drawings.
II. In a leather rolling machine the use of a rack such as Q and wedges such
as RS for the purpose of raising or lowering the table substantially as and
for the purposes hereinbefore described and illustrated in the accompanying
drawings.
III. In a leather rolling machine the use of adjusting wedges such as M, M,
with a screw such as O in combination with a rack such as Qand wedges such as R S
substantially as and for the purpose hereinbefore described and illustrated in the
accompanying drawings.
IV. The contrivance described for preventing oil from dropping upon the leather
from the sliding piece carrying the roller.
Dated this 30th day of October 1889.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicants.