CERTAIN IMPROVEMENTS IN THE MANU- FACTURE OF WATER-PROOF OR LIQUID-PROOF PAPER OR GLAZED PAPER OR FABRICS
Year: 1867

page_text: LETTERS PATENT to John Thorpe, of Manchester, in the County of
Lancaster, for the Invention of "CERTAIN IMPROVEMENTS IN THE MANU-
FACTURE OF WATER-PROOF OR LIQUID-PROOF PAPER OR GLAZED PAPER OR
FABRICS."
Sealed the 29th May 1868, and dated the 3rd December 1867.
PROVISIONAL SPECIFICATION left by the said Jolin Thorpe at the Office
of the Commissioners of Patents, with his Petition, on the 3rd December
1867.
I, JOHN THORPE, of Manchester, in the County of Lancaster, do hereby
declare the nature of the said Invention for "CERTAIN IMPROVEMENTS IN THE
MANUFACTURE OF WATER-PROOF OR LIQUID-PROOF PAPER OR GLAZED PAPER OR
FABRICS," to be as follows:-
My Invention relates to the manufacture of a novel description of water-
proof, liquid-proof, or glazed paper or woven fabric which is applicable for
numerous purposes where liquid-proof qualities, or paperor cloth with a glazed
surface is required, such as, for instance, for enclosing goods or materials
packed by hydraulic or other pressure, or for ordinary packing purposes,
for lining or covering boots, hats, or articles of wearing apparel, and for other
...Prine Rd 7.

page_text: lining or covering purposes, for surgical, hospital, and military purposes, as
bandages, sheeting, tents for preventing liquid penetrating, or for preventing
evaporation, or for making receptacles for liquids, or for covering walls or
partitions, either to exclude moisture or as a glazed surface on which to
print or paint patterns or designs.
The Invention consists in applying to the surface of paper or fabric on one
´or both sides a mixture of copal or other varnish ordinarily used to varnish
wood, and linseed oil containing litherage, litharge, or red lead, to produce
a superior quality of liquid-proof paper. I preferto employ such paper as is
made from wood fibre, but the paper thus treated may be varied according
to the quality to be produced. I take about equal quantities of copal or
ordinary wood varnish and boiled linseed oil, with which has been mixed
sufficient litherage, red lead, or other suitable drying compound to make it
dry readily, and the paper or fabric is to be coated on one or both surfaces
with such mixture either by hand or by passing it through a trough containing
the mixture (either hot or cold), and thence between flannel covered rollers
to render the surface even and remove the surplus mixture, or by other ordinary
mechanical means, after which the coated paper or fabric is placed in a stove
heated to about 160 or 190 degrees, and removed when dry. The proportions
given above are capable of considerable variation as for some purposes the
varnish may be employed almost alone.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Thorpe in the Great Seal Patent Office on the 1st
June 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
THORPE, of Manchester, in the County of Lancaster, 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 sixty-seven, in the thirty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said John Thorpe, Her special license that I, the said John Thorpe,
my executors, administrators, and assigns, or such others as I, the said John
Thorpe, 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

page_text: Channel Islands, and Isle of Man, an Invention for "CERTAIN IMPROVEMENTS IN
THE MANUFACTURE OF WATER-PROOF OR LIQUID PROOF PAPER OR GLAZED PAPER,"
upon the condition (amongst others) that I, the said John Thorpe, 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 Office
within six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said John Thorpe, 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 (that is to say):-
My Invention relates to the manufacture of a novel description of water-
proof,liquid-proof,orglazed paper whichis applicable for numerous purposes.
where liquid-proof qualities or paper with a glazed surface is required, such
as, for instance, for enclosing goods or materials packed by hydraulic or other
pressure, or for ordinary packing purposes, for lining or covering boots, hats,
or articles of wearing apparel, and for other lining or covering purposes, as
table cloths, bandages, sheeting, tents for preventing liquid penetrating, or
for preventing evaporation, or for making receptacles for liquids, or for cover-
ing walls or partitions, either to exclude moisture or as a glazed surface on
which to print or paint patters or designs.
The Invention consists in applying to the surface of paper on one or both
sides a mixture of copal or other varnish (ordinarily used to varnish wood)
and linseed oil containing litherage, litharge, or oxide of lead, to produce as
superior quality of liquid-proof paper. I prefer to employ such paper as is
made from wood fibre, but the paper first treated may be varied according to
the quality to be produced. I take about equal quantities of copal or ordinary
wood varnish and boiled linseed oil, with which has been mixed sufficient
litherage, oxide of lead, or other suitable drying compound to make it dry
readily, and the paper is to be coated on one or both surfaces with such
mixture either by hand or by passing it through a trough containing the
mixture (either hot or cold), and thence between flannel covered rollers to
render the surface even and remove the surplus mixture, or by other ordinary
mechanical means, after which the coated paper is placed in a stove heated
to about 160 or 190 degrees, and removed when dry. The proportions given
above are capable of considerable variation, as for purposes the narnish may
be employed almost alone. After the paper is thus prepared it is liquid-proof

page_text: and water-proof, and it may be used in such condition, or it may be grained
or printed upon in color for subsequent use as table covers, or for other
ornamental or covering purposes. I would remark that I do not claim the
mechanical means for applying the oil and varnish, as any of the machines
ordinarily used in the manufacture of "oil baizes" or "American leather
cloth" are suitable for such process, but I claim the improvements in the
manufacture of water-proof or liquid-proof paper or glazed paper as described,
or any slight variation or modification thereof for the purposes described, or
for analogous purposes.
In witness whereof, I, the said John Thorpe, have hereunto set my
hand and seal, this Thirtieth day of May, in the year of our Lord
One thousand eight hundred and sixty-eight.
Witnessed by
JOHN L. DAVIES,..
Office for Patents,
Manchester.
JOHN THORPE (L.S.)