CERTAIN IMPROVEMEN IN THE PREPARATION OF PAPER TO BE EMPLOYED IN THE MANUFACTU OF WATERPROOF PAPER
Year: 1868

page_text: LETTERS PATENT to. Thomas Whittaker, of Manchester; in the
County of Lancaster, for the Invention of "CERTAIN IMPROVEMEN
IN THE PREPARATION OF PAPER TO BE EMPLOYED IN THE MANUFACTU
OF WATERPROOF PAPER."
Scaled the 5th September 1868, and dated the 6th March 1868.
PROVISIONAL SPECIFICATION left by the said Thomas Whittaker :.:
the Office of the Commissioners of Patents, with his Petitio::,
on the 6th March 1868.
I, THOMAS WHITTAKER, of Manchester, in the County of Lancaster
do hereby declare the nature of the said Invention for "CERTA::
IMPROVEMENTS IN THE PREPARATION OF PAPER TO BE EMPLOYED IN TL
MANUFACTURE OF WATERPROOF PAPER," to be as follows:-
My Invention is designed to prepare paper which is to be suli
sequently pitched, oiled, or otherwise waterproofed so as to enab!
such prepared surface to receive the application of waterproofin
.

page_text: materials more readily, and also to render the waterproofed paper
more pliable and durable and less likely to crack when being curved,
bent, or folded.
The improvements consist in corrugating, indenting, or embossing.
one or both surfaces of such paper with lines, ribs, undulations, or
such other patterns or devices as may be found most suitable, or
such lines or patterns may be formed in the paper during its.
manufacture instead of by the process of embossing.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Whittaker in the Great Seal Patent
Office on the 5th September 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS:
WHITTAKER, of the City 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 March, in the year
of our Lord One thousand eight hundred and sixty-eight, in the
thirty-first year of Her reign, did, for Herself,. Her heirs. and successors,.
give and grant unto me, the said Thomas Whittaker, Her special
licence that I, the said Thomas Whittaker, my executors, administrators,
and assigns, or such others as I, the said Thomas Whittaker, 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
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 PAPER. TO BE EMPLOYED IN THE
MANUFACTURE OF WATERPROOF PAPER," upon the condition (amongst
others) that I, the said Thomas Whittaker, my executors or adminis-
trators, 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: Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Thomas Whittaker, do hereby
declare the nature of my said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement :-
These improvements relate to those descriptions of paper which are
rendered waterproof by being passed through heated oil, tar, pitch,
or other waterproofing liquid and afterwards dried. Now, my improve-
ments consist in producing an embossed, corrugated, or uneven
surface or pattern upon such paper by passing it through an ordinary
embossing machine, the rollers of which are fluted or have the
necessary pattern to be reproduced, engraved, etched, or cut upon
them to produce the necessary impression or pattern upon the
paper before it is passed through the heated oil, tar, pitch, or other
waterproofing mixture, by which means the paper so treated will be
found when oiled or after being passed through the tar, pitch, or
other waterproofing material to be more pliable and much less liable
to crack than the ordinary smooth surface paper similarly treated,
and the heavier qualities of paper, which hitherto have been so stiff
in an oiled or waterproof state as to render them almost useless for
packing purposes by this process are made quite pliable and supple.
It is also found in practice that waterproof paper treated according
to this Invention has a finer finish, the oil, tar, pitch, or other
waterproofing material taking to the paper better and laying more
smooth and evenly than upon smooth surface paper, and not so
liable to settle in places so as to cause it to stick together when put
up in rolls or continuous lengths.
Having thus particularly described and. ascertained the nature of
this my said Invention, together with the best means with which I
am acquainted for carrying the same into practical effect, I wish it
to be understood that I do not confine myself to the particular
method herein-before described for producing the necessary corrugated,
embossed, or uneven surface upon the paper, as this may be accomplished
in a variety of ways, but what I do claim is, producing an embossed,
corrugated, or uneven surface upon paper previous to passing it

page_text: through the oil, tar, pitch, or other waterproofing liquid by which it
is rendered waterproof, as and for the purpose herein-before described.
In witness whereof, I, the said Thomas Whittaker; have hereunto
set my hand and seal, this Fourth day of September, in the
year of our Lord One thousand eight hundred and sixty-eight..
THOMAS (L.s.) WHITTAKER.