Rollers, Drums, Pulleys, Wheels, or Cylinders, with Leather or similar Materials.
Year: 1885

page_text: Rollers, Drums, Pulleys, Wheels, or Cylinders, with Leather
or similar Materials.
I BENJAMIN ODDY, of Albion Mills, Laisterdyke, Bradford, in the county of
York, pressing roller maker and coverer 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 :-
My invention relates to an improved method of and apparatus for stretching
and holding in position strips of leather when covering the surfaces of rollers
whereby they are more thoroughly stretched and the under surface of the leather
is brought into more perfect contact with the surface of the roller, and is con-
sequently more firmly attached thereto by means of the cement used for that.
purpose; further the upper or outer surface of the leather, by being more regularly
and perfectly stretched and held firmly in its required position during the time
that the cement is setting, is caused thereby to present a more level and even
surface, and is free from the ridges and creases that exist in the leather covering of
rollers as applied and fixed by methods hitherto in use.
To carry out my invention I turn up the rim of the rollers to be covered, in an
ordinary slide lathe, and leave the tool marks in the iron, in preference to smoothing
them up, in order that the cement used for fastening the leather covering to the
iron roller may have a rougher surface to adhere to, and may thereby form a
stronger and more durable joint between the leather and the iron, I then cut a
strip of leather to the required size, and having covered the under side of it with
cement, I place it in position upon the periphery of the roller, and fix one end
firmly thereto by means of a screw cramp, the top bar of which is provided with
spikes, to penetrate and hold the leather, and the bottom bar of which passes on to
the underside of the periphery of the roller, and is secured to the top bar of the
cramp by means of bolts and nuts at each end, which bolts and nuts by being
screwed up, hold the end of the leather firmly to the periphery of the roller.
The loose end of the strip of leather, after being passed round the roller, is
brought to within a short distance of the fixed end hereinbefore referred to, and
another screw cramp is placed upon the said loose end of the strip of leather, and
screwed up sufficiently tight to hold the end of the leather by means of the spikes

page_text: in the upper bar, but so as to allow the lower bar to slide upon the inner periphery
of the roller. A third screw cramp is passed over both the hereinbefore described
screw cramps which are attached to the two ends of the strip of leather, (or set
screws may be employed) and then screwed up, so that both the cramps with the
two ends of the strip of leather are drawn forcibly together, and the leather is then 5
cut off so that the ends may fit closely and neatly together and they are held down
by means of the cement.
The screw cramps are not removed until the cement which attaches the strip of
leather to the roller is firmly set.
The screw cramps herein referred to may be formed of short flat rods of iron,
held together and adjusted to the peripheries of the rollers to be covered by means
of ordinary bolts and nuts, or the cramps may be formed of strong wire hooked
together and screw threaded to receive the nuts.
In order to enable my invention to be fully understood, I will proceed to describe
the same by reference to the accompanying drawing in which figure 1 represents a 1
side elevation of a roller or wheel with a strip of leather thereon and shewing my
improved apparatus or cramps in position for. stretching the leather. Figure 2,
represents a plan of the same and figure 3, an elevation of the cramps, showing the
strip of leather, and the rim of the roller in section. Figure 4 represents a larger
sized roller or drum with a strip of leather thereon and with the cramps of a 2
proportionate size fixed in position as described; figure 5, represents a plan of the
same and figure 6, an elevation with the leather covering and the rim of the drum
in section.
Figures 7 and 8 represent cramps formed of strong wire as described.
Similar letters refer to similar parts in all the figures of the drawing.
The roller or drum to be covered with leather is represented at A, and the strip
of leather for covering such roller or drum is shewn at B. The top bars of the two
screw cramps, which hold the leather, are shown at C, which top bars are provided
with spikes to penetrate and take firm hold of the strip of leather. The bottom
bars of the cramp D, pass under the periphery or rim of the roller or drum B, and
are attached to the top bars C, by screws and winged nuts E, which nuts can be
screwed as tightly as required by hand. When the strip of leather has been.
cemented and placed in position, one of the cramps is placed upon it, near one of
the ends of such strip, and at an angle with the rim of the roller or drum, but
parallel with the ends of the strip of leather, which are cut off and. fitted together
at an angle to the edges of the strip as represented.
The said cramp is then screwed up firmly in position so as to hold one end of
the strip of leather, and the loose part of the strip of leather, which has been
cemented as described is then passed round the roller or drum, and pulled as
tightly as is practicable in an ordinary covering machine, so that it lies evenly
round the roller or drum, to which it is caused to adhere by means of the cement.
The second screw cramp is then placed in position (parallel with the first cramp).
upon the loose end of the strip of leather, and the winged nuts are then screwed
up sufficiently tightly to hold the leather B close to the surface of the roller or
drum A but so as to allow the bottom bar of the cramp D to slide upon the inner
surface of the rim of the roller or drum A. The third screw cramp F, formed also
of two flat rods, and two screws, is then placed over the two cramps which hold
the ends of the strip of leather, and this third cramp F, being then screwed up by
means of the winged nuts G, the two ends of the strip of leather will be drawn
together; they are then cut off at an angle as represented in figure 2 in order that
they may fit neatly together, and are pressed down until they adhere firmly to the
rim of the roller or drum, and the cramps are left in position until the cement has
dried or become set.
In figures 4, 5 and 6 which represent a larger sized drum having a covering of
leather placed thereon, to be fixed by my improved apparatus, the cramps after
they have been screwed into position, as herein before described, are drawn together
(without the aid of a third cramp) by means of the set screws F³, which pass

page_text: through both the top bars of the cramps C, whereby the two ends of the leather
are brought forcibly together and the leather is stretched evenly, and to its fullest
extent, round the periphery or rim of the roller or drum. The top bars of both
forms of cramps for holding the leather are fitted with spikes or pins for penetrating
and taking firm hold of the leather. The set screws H, are for the purpose of
keeping the bottom bar of the cramp D parallel with the top bar C; the heads of.
these set screws fit in grooves J, formed in the underside of the top bar C,"
whereby they are prevented from being moved out of their proper position.
By the means herein described great power can be brought to bear upon the
strip of leather, which can be stretched to its fullest extent longitudinally, and
thereby caused to lie very evenly upon the surface of the roller or drum and at the
same time the pressure brought to bear causes the cement to unite the leather to
the surface of the iron very firmly.
Figures 7 and 8, represent screw cramps, for the purpose herein described, and
constructed of strong iron wire jointed together and provided with winged nuts.
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
The construction and use of screw cramps, for the purpose of stretching and
holding strips of leather for covering metallic rollers, drums, pulleys, wheels or
cylinders all substantially in the manner and for the purpose herein set forth.