Improved Process for Making Paper, Linen, and similar Material Impervious to Water.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improved Process for Making Paper, Linen, and similar Material
Impervious to Water.
A communication from DAVID MACDONALD, of 231, King Street, East, Manufacturer,
and WILLIAM TASSIE TASSIE, Broker, of 48, Front Street, East, both in the city
of Toronto, Canada.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., do hereby declare the nature of this invention und in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
The object of the invention is to make paper, linen, and similar material impervious
to water, and at the same time present a highly finished smooth surface; and it
consists essentially in soaking the material in oil, then passing it between wringing
rollers, after which the material is dried and then completely covered with an ink, or
similar material evenly distributed over its surface with or without pressure sub-
stantially as hereinafter specified.
The primary object of this invention was to make paper so that it could be exposed
to the worst kind of weather without any fear of being destroyed or even damaged.
In developing their ideas my correspondents found that the invention would bo of
great value for the purpose of imparting a highly finished surface to linen used in the
manufacture of children's books; they have also discovered that it may be used to
great advantage for the purpose of making material used in garments impervious to
water. This invention although producing marvellous results, is exceedingly simple,
and when proper appliances are provided the cost will be infinitesimal as compared
with the results.
I first take the paper or other material and when in sheets place them each in a
separate bath preferably of hot boiled linseed-oil; after allowing each sheet to soak
in its bath for say twenty-four hours or such time as may be necessary to allow the
oil to thoroughly soak through the paper or other material, I remove the sheet and
pass it between a pair of wringing rollers which are set with sufficient pressure to
thoroughly wring all surplus oil from the sheet. The sheet is then placed in a
position to dry; for instance it may be placed between two sheets of such material as
will readily absorb the oil remaining on the surface of the sheets. This plan will be
found the quickest way to secure the desired end, but it will of course be understood
that my correspondents do not wish to confine themselves to any particular means for
drying the sheets. When the sheet is sufficiently dry I pass it through a cylinder
printing machine; preferably a lithographer's printing-press, printing over the entire
surface of the paper with printer's ink, or similar material which may be white or such
other color as may be desired. The pressure on the sheets while passing through this
press is sufficient to impart a highly finished smooth surface, which when the ink is
dried may be printed upon in the ordinary way.
When the paper or other material is in a web this process may be carried out by
placing the roll of paper or other material in suitable bearings in which case the said
material would be carried slowly through a bath of oil between wringing rollers after
leaving the bath, then through a drying room, and finally through the machine by
which its entire surface is covered with ink or similar material.
I need scarcely add that the ink may be applied to either one or both sides of the
material.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondents, I declare that what I claim is ;-
The within described process for the preparation of paper linen, or similar material

page_text: which consists in soaking the material in oil, thon passing it between wringing rollers,
after which the material is dried and then completely covered with an ink or similar
inaterial evenly distributed over its surface with or without pressure, substantially as
specified.