IMPROVEMENTS IN PACKING MATERIAL, PRO, AND IN THE METHOD OF MANUFACTURING THE SAME
Year: 1875

page_text: LETTERS PATENT to Peter McLaine, of Manchester, in the County of
Lancaster, for the Invention of "IMPROVEMENTS IN PACKING MATERIAL,
PROVISIONAL SPECIFICATION left by the said Peter McLaine at the
Office of the Commissioners of Patents, with his Petition, on the
26th November 1875.
I, PETER MCLAINE, of Manchester, in the County of Lancaster, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
PACKING MATERIAL, AND IN THE METHOD OF MANUFACTURING THE SAME," to be
as follows:
The object of this Invention is so to combine tarpauling and brown
paper that a waterproof packing material is produced, one side of which
is perfectly clean so that the goods packed suffer no damage if they
come in contact with it, and at the same time so to combine the two
materials that they cannot be separated, and to produce a substance
which will not crack and is perfectly flexible.

page_text: The mode of proceedure is as follows:-The canvas to be converted
into tarpauling is conducted over suitable rollers to a caldron or tank of
boiling tar through which it is passed beneath a merging roller. This
tank is always kept filled up to a certain level from another tank, and a
continuous sheet of brown paper passes beneath another roller which is
arranged so as to just dip one side of the paper only into the boiling tar.
Almost immediately on emerging from the tank the two materials after
passing between "doctors or scrapers to remove the surplus tar are
brought together and passed between squeezing rollers, the consequence
of which is that they become firmly united, and when dry can only be
separated with the greatest difficulty.
""
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Peter McLaine in the Great Seal Patent Office
on the 25th May 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PETER
MCLAINE, of Manchester, in the County of Lancaster, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-sixth day of November, in the
year of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto I, the said Peter M Laine, Her special
license that I, the said Peter McLaine, my executors, administrators,
and assigns, or such others as I, the said Peter McLaine, 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 "IMPROVE-
MENTS IN PACKING MATERIAL, AND IN THE METHOD OF MANUFACTURING THE
SAME," upon the condition (amongst others) that I, the said Peter
McLaine, 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

page_text: 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 Peter M‘Laine, 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 and accompanying Drawing:-
The object of this Invention is so to combine tarpauling and brown
paper that a waterproof packing material is produced, one side of which
is perfectly clean so that the goods packed suffer no damage if they
come in contact with it, and at the same time so to combine the two
materials that they cannot be separated, and to produce a substance
which will not crack and is perfectly flexible.
The mode of procedure is as follows:-The canvas to be converted
into tarpauling is conducted over suitable rollers to a caldron or tank of
boiling tar, through which it is passed beneath a merging roller. This
tank is always kept filled up to a certain level from another tank, and a
continuous sheet of brown paper passes beneath another roller which is
arranged so as to just dip one side of the paper only into the boiling tar.
Almost immediately on emerging from the tank the two materials after
passing between doctors or scrapers to remove the surplus tar are
brought together and passed between squeezing rollers, the consequence
of which is that they become firmly united, forming a waterproof
packing material clean upon one side and adhesive upon the other, and
when dry can only be separated with the greatest difficulty.
I may here remark that in some cases where great strength is not
required a thicker kind of brown paper may be used instead of the
canvas and in the same manner.
The apparatus which I prefer to employ for the above purpose is
shown in section in the annexed Drawing, but any similar suitable
apparatus may be employed that will effect the necessary conditions,
vizt., to saturate the canvas in heated tar and to apply heated tar to
one side of the paper only, and then whilst the two are in a heated state
to press them firmly together.
a, a, is a tank or caldron in which the tar is kept heated by means of
a furnace or by a steam jacket; b, b, is a merging or immersing roller,
round which the canvas c, c, passes so as to become thoroughly saturated

page_text: with the heated tar; d, d, is a roller kept. heated by steam and dipping
into the tar; it is scraped by means of a doctor e, e, and distributes an
even layer of tar on to one side of the paper f,f, as it passes between it
and the roller g, g; h, h, are doctors for scraping the superflous tar off
the canvas, above which the canvas or tarpauling and the paper are
brought together whilst still hot and squeezed by means of rollers i, i.
The packing material thus made then passes over other rollers to be
cooled and dried.
Having now described the nature and object of my said Invention,
together with the manner in which the same is to be or may be per-
formed or carried into practical effect, I wish it to be understood that I
claim as my Invention, the improved packing material formed as
described, together with the method of manufacturing the same, as
herein-before more particularly set forth.
In witness whereof, I, the said Peter M'Laine, have hereunto set
my hand and seal, this Nineteenth day of May, in the year of
our Lord One thousand eight hundred and seventy-six.