IMPROVE- MENTS IN MAUNDRILLS FOR PRINTING
Year: 1858

page_text: LETTERS PATENT to Charles Coates, of Sunnyside, near Rawtenstall,
in the County of Lancaster, Engineer, for the Invention of "IMPROVE-
MENTS IN MAUNDRILLS FOR PRINTING."
Sealed the 28th January 1859, and dated the 3rd December 1858.
PROVISIONAL SPECIFICATION left by the said Charles Coates at the
Office of the Commissioners of Patents, with his Petition, on the
3rd December 1858.
I, CHARLES COATES, of Sunnyside, Rawtenstall, in the County of Lancaster,
Engineer, do hereby declare the nature of the Invention for "IMPROVEMENTS
IN MAUNDRILLS FOR PRINTING," to be as follows:-
This Invention has for its object improvements in maundrills for printing
rollers. For this purpose the body of the maundrill is made so that it goes
easily into the copper printing roller and is made conical at each of its ends;
over each of these conical ends a hoop of iron or steel is placed, the external
diameter of which is turned to about the internal diameter of the copper roller,
and its interior is made to fit the conical part of the maundrill; the iron or
steel hoop is also cut longitudinally in one or more places. When the.

page_text: maundrill is put into a copper roller the hoop is forced up the conical part
of the maundrill by means of nuts screwing on to the ends of the maundrill
which expands the hoop and causes it to press against the inside of the roller
which will thus be held securely. The nuts screwing on to the ends of the
maundrill are made circular and have a screw thread cut on their outside,
on to which another nut can be screwed so as to act as a collar to prevent
the copper roller moving endways upon the maundrill. If the hoops are
cut in more than one place, so as to form two or more wedges, a pin is passed
through each end of the maundrill, and the ends of the pins work in recesses
in the wedges; the wedges are also retained by a flexible hoop or spring
which passes around them, and presses them against the maundrill. By
these means the wedges are prevented from turning around, and also from
falling off the maundrill.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Coates in the Great Seal Patent Office on the 3rd
June 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
COATES, of Sunnyside, near Rawtenstall, in the County of Lancaster.
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of December, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-second year of
Iler reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Charles Coates, Her special licence that I, the said Charles Coates,
my executors, administrators, and assigns, or such others as I, the said Charles
Coates, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during the
terin therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN MAUNDRILLS FOR
PRINTING," upon the condition (amongst others) that I, the said Charles Coates
my executors or administrators, by an instrument in writing under my
or their, or one of their hands and seals, should particularly describe and
ascertain the nature of the said Invention, and in what manner the same
was to be performed, and cause the same to be filed in the Great Seal Patent

page_text: Ofice within six calendar mоnts цехt and mediately anter the date UI
the said Letters Patent.
NOW KNOW YE, that I, the said Charles Coates, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
This Invention has for its object improvements in maundrills for printing
rollers. For this purpose the body of the maundrill is made so that it goes
casily into the copper printing roller, and is made conical at each of its ends;
over each of these conical ends a hoop of iron or steel is placed, the external
diameter of which is turned to about the internal diameter of the copper
roller, and its interior is made to fit the conical part of the maundrill. The
iron or steel hoop is also cut longitudinally in one or more places. When:
the maundrill is put into a copper roller the hoop is forced up the conical
part of the maundrill by means of nuts screwing on to the ends of the
maundrill which expands the hoop and causes it to press against the inside
of the roller which will thus be held securely. The nuts screwing on to the
ends of the maundrill are made circular and may have a screw thread cut on
their outside on to which another nut can be screwed, so as to act as a collar
to prevent the copper roller moving endways upon the maundrill. If the
hoops are cut in more than one place, so as to form two or more wedges, a
pin is passed through each end of the maundrill, and the ends of the pins
work in recesses in the wedges; the wedges are also retained by a flexible
hoop or spring which passes around them, and presses them against the
maundrill. By these means the wedges are prevented from turning round
and also from falling off the maundrill.
And 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 shews a longitudinal section, and Figure 2 a plan of a maundrill
and copper printing roller connected together according to my Invention;
a is the body of the maundrill made so that it goes easily into the copper
printing roller b, and each end of the portion which goes within the roller is
made conical as shewn, and beyond these conical parts a screw thread is cut;
over each of these conical ends is placed a hoop of iron or steel c, the external

page_text: roller, and its interior is made to fit the conical part of the maundrill; the
hoop or wedge c is cut longitudinally so as to allow of its being expanded to
fit the interior of the roller b, and the ring or wedge. c, is prevented from
turning by means of a pin c 1, which passes through the maundrill a, and
into recesses in the ring or wedge c. When a copper roller is to be put on
to a maundrill, the maundrill is held in the stand A, as shewn in the Drawing;
the copper roller is slid on to the maundrill, and the wedge c at one end is
then forced up the conical part of the maundrill by screwing up the nut d, by
the key e, so that the wedge c-is caused to expand, and the copper roller is
thus held firmly at this end; at the other end the wedge c is forced up the
conical part of the maundrill by means of the toothed wheel f, which is
turned by the key f1, in the interior of which wheel a screw thread is cut
to correspond with the screw thread on the maundrill; the screw thread at one
end of the maundrill is made right handed, and the screw thread at the other
end left handed, so that when the roller is in use, the friction of the nut d at
the one end of the toothed wheel f, at the other end against the collars of the
bearings keeps the nuts screwed up, and so keeps the wedges or hoops c forced
up against the interior of the copper roller by which means the copper roller
is constantly held tight, even though hot color is used and the copper roller
consequently caused to expand. The wheel f, when the copper printing roller
is in use gears with another toothed wheel on the furnishing roller, or roller
which supplics color to the engraved copper printing roller; the toothed wheel
f is shewn in the Drawing in the position in which it is placed for forcing the
copper roller off the maundrill. For the purpose of forcing the copper roller
off the maundrill, the piece g which turns and slides on the pin h projecting
from the stand A is turned round, so as to come between the wheel f and
the end of the roller b, and when the wheel f is turned round so as to cause
it to advance it pushes the roller 6 of the maundrill. If the hoops or wedges
care cut in more than one place, so as to form two or more wedges, a pin
is passed through each end of the maundrill, and the ends of the pins work in
recesses in the wedges; the wedges are also retained by a flexible hoop or
spring which passes around them, and presses them against the maundrill.
Figures 3 and 4 shew sections of an arrangement of this kind; c, c, are the
wedges; c 1 is the pin passing through the maundrill, its ends sliding in
recesses in the wedges c, and k is the flexible hoop or spring which passes
around the wedges c, and presses them against the maundrill. By these
means the wedges are prevented from turning around and also from falling off
the maundrill.

page_text: Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that what I claim is the
holding printing rollers on maundrills by wedges working on inclines on the
maundrills as herein described.
In witness whereof, I, the said Charles Coates have hereunto set my
hand and seal, this Second day of June in the year of our Lord
thousand eight hundred and fifty-nine.
Witness,
WM. W. PLATT.
of Manchester.
CHARLES COATES. (L.S.)