IMPROVEMENTS IN ROLLS FOR DRAWING AND SPINNING MACHINES
Year: 1884

page_text: I CHARLES COUPLAND of Seymour in' the State of Connecticut, United States
of America, Woolen Manufacturer do hereby declare the nature of said invention
for "IMPROVEMENTS IN ROLLS FOR DRAWING AND SPINNING MACHINES" to be as
follows:-
:
My invention is made for rendering the roller more durable, for, preventing the
leather becoming loose, for allowing the surface to be turned off when necessary
to render it true and for allowing pieces and cheaper' scraps of leather to be used
so as to lessen the cost of such rolls.
The roll may be of any desired size; the body is usually of cast iron with, a,
surface of leather formed as next described. In the surface of the body there are
peripheral grooves turned with undercut or dovetailed edges: if there is but one.
groove there is. a dovetailed rib at each edge of the roll. There may be, however,
one or more intermediate ribs with dovetailed or undercut edges, and these inter-
mediate ribs should not be as deep as the ribs at the edges of the roll in order
that the strength of the central portion of the leather may not be materially
lessened.
The pieces of leather are cut by a cutter of the exact shape. required and the
inner portion of each piece is of a shape to fit tightly the grooves and ribs in the
periphery of the roll.
The pieces of leather after being cut out to shape, are packed in a tube of corre-,
sponding shape with intermediate pieces of sheet metal that are thickest at the bases
of the pieces of leather and thinnest at the outer parts of such pieces of leather,
and these are pressed by a suitable follower entering the tube, the press being
powerful such as a hydraulic press, so that when the pieces of leather are removed
they will be thinnest at their bases and their surfaces will be converging planes.
intersecting at a point corresponding to the axis of the roll, in order that when the;
pieces of leather are packed side by side in the peripheral channels, their surfaces,
may set closely together and be radial, and form a complete peripheral surface of
leather to the roll. These leather segments may be introduced in any convenient
manner into the peripheral channel. For instance the roll may be made, in two,
halves; the two halves are first packed with the pieces of leather and then said
two halves brought together and bolted. It is preferable, however, to cut one or
more transverse grooves in the periphery of the roll, through which grooves the

page_text: pieces of leather can be introduced and passed into their places after which the
transverse grooves are to be filled with pieces of leather packed in a base block
that is secured in place by screws. I do not limit myself, however, to the manner
of introducing the pieces of leather in the peripheral channel.
COMPLETE SPECIFICATION.
I CHARLES COUPLAND of Seymour in the State. of. Connecticut, United States
of America, Woolen Manufacturer do hereby declare the nature of said invention
for "IMPROVEMENTS IN ROLLS FOR DRAWING AND SPINNING MACHINES" and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
1
Great difficulty has been experienced in maintaining the leather surfaces of:
drawing rolls in perfect condition!!
..
The best quality of leather has to be used and the same is usually in the form
of a strap of ring passed around the pulley to form the surface thereof.
Sometimes the pulley is of wood and the leather glued and pegged thereto;
sometimes the pulley is of iron with the leather received into a recess.
In either case the leather is liable to become loose and also to be injured by
turning off the surface to remove any inequality consequent upon use for a prolonged
period.
My invention is made for rendering the roll more durable, for preventing the
leather becoming loose, for allowing the surface to be turned off when necessary to
render it true, and for allowing pieces and cheaper scraps of leather to be used so
as to lessen the cost of such rolls.
I make the surface of the body of the roll channeled with dovetailed or
undercut edges and cut out the pieces of leather in the proper shape and introduce
them into the channel and pack them radially so that the surface of the roll is.
made by the outer edges of the leather segments and the pressure and rolling
action to which the leather is subjected tends to pack such sections into the channel
and to render the same more harde and compact and the turning or smoothing
operation to which the surface of the roll is subjected from time to time, is easily
performed; because the cutting tooliacts across the grain of the leather and such
leather is in small pieces and the tool does not tend to run into or follow the grain
of the leather in turning off the surface.
In the drawing
Fig. 1, is a side view of the drawing foll.with the body of the roll in one piece..
Fig. 2, is a section of the same at the line quað 161001
.it.
101!

page_text: Fig. 3, is a side view of the drawing roll with the body of the roll divided. in a
plane at right angles to the axis of the roll.
Fig. 4, is a section of the same at the line y, y..
Fig. 5, is a sectional view of a portion of the drawing roll with two dovetailed
channels in its periphery and
Fig. 6, is a similar view showing three dovetailed channels for the reception of
the leather segments.
The body of the roll is of any desired size or shape and usually it is of
cast iron,
In the surface of the body of the roll there are one or more peripheral grooves
or channels turned with undercut or dovetailed edges.
If there is but one groove there will be a dovetailed rib at each edge of the
body of the roll as at c. c. figs 1, 2, 3 & 4.
There may also be one intermediate rib b, as in fig. 5, or two intermediate
ribs b. b, as in fig. 6, each rib being undercut or dovetailed at its edges.
The intermediate ribs should not be as deep as the ribs c. in order that the
thickness and strength of the central portion of the leather may not be materially
lessened.
The pieces or segments e. of leather are cut out of a shape to fit tightly the
grooves and dovetailed ribs in the periphery of the body of the roll.
The pieces of leather after being cut out to shape may be packed in a tube of
corresponding shape with intermediate pieces of sheet metal that are thickest at
the bases of the pieces of leather and thinnest at the outer parts of such pieces of
leather, and these are pressed by a suitable follower entering the tube, the press
being powerful such as a hydraulic press so that when the pieces of leather are
removed they will be thinnest at their bases and of sectoral form and their surfaces
will be converging planes intersecting at a point corresponding to the axis of the
roll, in order that when the pieces of leather are packed side by side in the
peripheral channels in the body of the roll, their surfaces may set closely together
and be radial and form a complete peripheral surface of leather to the roll.
The leather surface thus obtained is very durable and can not become loose upon
the roll, because the tendency of the leather to expand will cause the segments to
set closely together in use, and this will be increased by the edgewise pressure
upon the segments when in use in the drawing or spinning machines.
These leather segments may be introduced in any convenient manner so as to
be entered properly into the peripheral channel or channels in the body of
the roll.
For instance the body of the roll may be made in two halves to be secured
together by bolts, the roll being divided either in a plane at right angles to the
axis of the shaft of the roll as shown in fig. 4, or in a plane coinciding with and
passing across the axis of said shaft as illustrated by dotted lines at m, m, fig. 1.
With either form of divided roll, the leather segments are to be packed together
in a circle in a suitable holder and then the two parts of the roll brought together
and bolted, thereby securing firmly the bases of the leather segments in the
peripheral channel of the body of the roll.
Where the body of the roll is made in one piece, I make one or more transverse
grooves in the periphery of the body of the roll so that the leather segments can
be introduced and passed into their places and packed tightly together, after which
the transverse groove is to be filled with leather segments, preferably contained in
a base block h, see figs 1, and 2, that is removable from the periphery of the roll,
and is secured in place by the screws passing through end flanges into the roll,
but I do not limit myself to any particular manner of filling up the transverse
groove or grooves through which the leather segments are introduced when the
body of the roll is of one piece, nor to the manner of introducing the leather
segments in the peripheral channel in the body of the roll when said body is made
in two or more pieces.

page_text: I find that my leather drawing roll is more elastic than those heretofore, made
and that the surface does not become dented by any small lumps or pieces that
pass between it and the steel roll, hence the hold on the filament is continuous and
the drawing operation uniform.
It is to be understood that after the leather segments have been secured in the
roll, the leather surface is to be turned or dressed off to render it true.
now particularly described and ascertained the nature of my said
Havnd in what manner the same is to be performed, I declare that what
invention
I claim is
15
4) ! 0.
j
-
First. The roll for drawing or spinning machines having a body with one or more
undercut peripheral channels or grooves and pieces of leather, set together in said
groove or grooves flatwise and parallel to the axis and consolidated by pressure
into sectoral shapes, the same forming a leather surface to the roll, substantially as
specified.
I
Second. The combination in a drawing or spinning roll having a leather surface,
of a body with one or, more undercut peripheral grooves, sectoral segments of
leather packed into such groove or grooves flatwise and parallel to the axis of the
roll, and one or more movable base blocks introduced into the body of the roll and
containing leather segments, substantially as set forth.
Third. The method herein specified of manufacturing rolls for drawing or
spinning machinery, consisting in cutting out sections of leather, compressing the
leather to consolidate the same, packing the sections of leather into the grooved
body of the roll, clamping the same and turning or dressing off the surface of the
leather, substantially as specified.