IMPROVEMENTS IN THE MANUFACTURE OF A MATERIAL AS A SUBSTITUTE FOR LEATHER
Year: 1856

page_text: PROVISIONAL SPECIFICATION left by John Rowley at the Office of the
Commissioners of Patents, with his Petition, on the 12th July 1856..
I, JOHN ROWLEY, of Camberwell, in the County of Surrey, do hereby declare
the nature of the said Invention of "IMPROVEMENTS IN THE MANUFACTURE OF
A MATERIAL AS A SUBSTITUTE FOR LEATHER," to be as follows:-
This Invention relates to certain improvements upon a former Patent dated
18th April 1854, No. 892, granted unto me, the said John Rowley, and
intituled "Improvements in the Manufacture of a Material as a Substitute.
for Leather," and the nature of the improvements constituting this present
Invention consist, firstly, of a mode of uniting together the materials of which
the substitute for leather is made; and, secondly, in the use of certain
materials not heretofore employed for effecting the uniting of a felted or
woven fabric with paper; that is to say, instead of uniting together the said
materials by the ordinary mode of pasting, pressing, and drying them, I
employ the following process:-If a woven material be used, I first "tap
the cloth by laying on one or both sides thereof a coating of China clay mixed
with other animal or vegetable size or albumen. This composition is laid on
by a stiff brush by machinery or other suitable means, rubbing it well into
the interstices of the material; it is then dried and rolled. I then proceed
to lay on the side which is to receive-the paper a coating of caoutchouc,
or gutta percha dissolved in naphtha, or caoutchoucine, or other suitable
solvent, to which has been added a certain proportion of gum Thus, or gum
"

page_text: sandarach; as the operation of laying on this composition proceeds, the paper,
properly dyed and prepared, is laid upon that side of the cloth upon which
the still moist composition is, and as soon as it comes into contact with the
cloth, prepared as aforesaid, it is passed between pressure rollers, then over
a series of heated cylinders, and, finally, between another pair of pressure
rollers; it is then ready to receive the subsequent operations for converting it
into a substitute for leather, according to the manner set forth and described
in my said former Patent, N. 892.
It may be observed, that when paper and cloth are united together by the
ordinary means, namely, by pasting or gluing one of the materials, and placing
it upon the other to which it is to be united, then submitting the same to
pressure and drying it, the following defects exist: The materials are easily
separated, the texture of the cloth is imprinted visibly upon the paper, and it
cannot be manufactured in long lengths; whereas by these improvements the
following advantages present themselves :-
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Firstly, the materials are inseparable by ordinary means; secondly, the
cloth, having been "tapped" as before stated, the interstices of the material are
filled up, and the coating of composition which is upon the surface of the
cloth; in addition to the tapping, renders the material when complete
perfectly smooth,, without any imprint of the texture of the cloth and, lastly,
the cloth can be manufactured-in any length.
T
LONDON.:
Printed by GEORGE EDWARD EYRE and WILLIAM SPOTTISWOODE, AS
Printers to the Queen's most Excellent Majesty: 1857.
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