CERTAIN IMPROVEMENTS IN THE PREPARATION OF WATERPROOF PAPER
Year: 1867

page_text: LETTERS PATENT to Thomas Whittaker and Martin Rourke, both of
Manchester, in the County of Lancaster, for the Invention of "CERTAIN
PROVISIONAL SPECIFICATION left by the said Thomas Whittaker "and
Martin Rourke at the Office of the Commissioners of Patents, with
their Petition, on the 6th August 1867.
We, THOMAS WHITTAKER and ALARTIN ROURKE, both of Manchester, in the
County of Lancaster, do hereby declare the nature of the said Invention
for CERTAIN IMPROVEMENTS IN THE PREPARATION OF WATERPROOF PAPER," to be as
follows:-
Our Invention relates to paper rendered waterproof by the use of oil, pitch,
or tar, and which is employed chiefly for packing purposes; and the improve-
ments consist in submitting long or continuous lengths of paper to a process
of oiling, pitching, or tarring, whereby both sides become covered simultaneously
with the waterproofing material instead of, and in contradistinction to, freating
paper in small pieces and on one side only as hitherto. In the process of
oiling the roll of paper is mounted in bearings, and as it unrolls it passes
beneath a guide roller submerged in a receptacle containing boiled oil, by
which means both sides are covered and the paper becomes saturated;-it-then-
passes between-squeezing rollers and on. 10 hot cylinders_or_into_a=heated=
chamber-10-be-dried
A similar arrangement of apparatus is employed to coat the two surfaces t
of long lengths of paper with pitch or tar, which is contained in the vessel,

page_text: instead of oil, but after leaving the pressing rollers the paper is extended
between rollers and quickly dries without heat; the advantages being that
paper so prepared is more impervious to liquid, and in packing large goods the
long lengths cover with fewer joints.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Whittaker and Martin Rourke in the Great Seal
Patent Ollice on the 5th February 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
WHITTAKER and MARTIN ROURKE, both of Manchester, in the County of
Lancaster, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of August, in the year of our Lord
One thousand eight. hundred and sixty-seven, in the thirty-first year of Her
reign. did. for Herself, Her heirs and successors, give and grant unto us,
the said Thomas Whittaker and Martin Konrke, Her special license
that we. the said Thomas Whittaker and Martin Rourke, our executors,
administrators, and assigns, or such others as we, the said Thomas Whittaker
and Martin Rourke, our executors. administrators, and assigns, should
at any time agree with, and no others, from time to time, and at all times
thereafter during the term 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 "CERTAIN
IMPROVEMENTS IN THE PREPARATION OF WATERPROOF PAPER," upon the condition
(amongst others) that we, the said Thomas Whittaker and Martin Rourke,
our executors or administrators, by an instrument in writing under our,
or one of our, or their, or one of their hands and scals, 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 Office within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that I, the said Martin Rourke, do hereby declare the
nature of the said Invention, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement
(that is to say):-
Our Invention relates to paper rendered waterproof by the use of oil,
pitch, tar, or similar waterproofing liquids, and which is employed chiefly for

page_text: packing purposes: and the improvements consist in submitting long or
continuous lengths of paper to a process of oiling. pitching, tarring, or water-
proofing liquid, whereby both sides become covered simultaneously with the
waterproofing material instead of and in contradistinction in ircating paper
in small pieces and on one side only as hitherto. In the process of oiling or
waterproofing the roll of paper is mounted in bearings, and as it unrolls it.
passes beneath a guide roller submerged in a receptacle containing boiled oil
or similar liquid, by which means both sides are covered and the paper
becomes saturated; it then passes between squeezing rollers or between
blades called doctors" and on to hot cylinders or into a heated chamber, or is
otherwise dried.
"
A similar arrangement of apparatus is employed to coat the two surfaces of
long lengths of paper with pitch or jar, which is contained in the vessel. instead
of oil, but after leaving the pressing rollers or doctors" the paper is extended
between rollers and quickly dries without heat, the advantages being
that paper so prepared is more impervious to liquid, and in packing large
goods the long lengths cover with fewer joints.
Having now described the nature of the said Invention. together with the
method of carrying the same into practical effect, we wish it to be distinctly
understood that we claim coating or covering both surfaces of long lengths of
paper simultaneously with oil, pitch, or tar, or similar liquids to render them
impervious to liquid, in contradistinction to waterproofing small pieces coated
on one side only.
In witness whereof, 1, ihe said Martin Rourke, have hereunto set my
hand and seal, this Fourth day of February, in the year of our Lord
One thousand eight hundred and sixty-eight.
Witnessed by
. Jous L. DAVIES,
Office for Patents,
Manchester.
MARTIN ROURKE. (L.S.)