Improvements in Materials or Compounds for Waterproofing Fabrics.
Year: 1896

page_text: COMPLETE SPECIFICATION.
Improvements in Materials or Compounds for Waterproofing
Fabrics.
A communication from LYMAN P. CONVERSE, of 1680 North Clark Street,
Chicago, State of Illinois, United States of America, Manufacturer.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention relates to the art of waterproofing fabric; and the object of the
invention is to provide a waterproof fabric, and a novel compound for lending to
it its waterproof quality, whereby the fabric shall retain its flexibility and pliability,
or even have superior flexibility, and shall not be liable to crack under variation in
temperature.
To produce the compound, a suitable vegetable oil, preferably linseed oil, is
boiled for about five hours, more or less, at a high temperature, say from 500° F.
to 600° F. While the oil is being thus boiled, the temperature should be raised
to about 650° F., more or less. Then the oil is cooled; and when cooled, animal's
blood is added, in the proportion of about one part of blood to three parts of the
oil, and the mixture is thereupon cooked, preferably in a steam-jacketed kettle,
at a temperature which need not exceed 212° F. Any suitable coloring material,
such as pulverulent lamp-black and oxide of zinc, may be added in quantity
sufficient to afford the desired color and thickening to the compound; and it is also
preferred to add to and thoroughly mix with the cooled mixture of oil and animal's
blood a proper quantity, say about one-fourth of the amount of oil used, of
petrolatum, vaseline, cosmoline, or any other product of coal-oil which is the
equivalent of petrolatum. The quantity of thickening material (which may be
the pulverulent color or other substance) is determined by the thickness of the
paste desired. The blood should be in a liquid condition, and is best when raw
and fresh, though it may be preparatorily cooked to preserve it for use in making
this compound. It mixes readily with the linseed oil, and affords a quick and good
dryer, while affording to the fabric to which the compound is applied peculiarly
superior flexibility and softness. The petrolatum ingredient of the compound
tends to increase this flexibility and to enhance the soft-keeping quality in cold
weather.
It is preferred to have the paste or compound thin enough to apply by hand, as
by spreading it with a knife, upon the surface or surfaces of the fabric to be coated
with it and thereby rendered waterproof; though it may be desired to make the
application with a brush, when, to adapt the compound for that purpose, any
thickening ingredient may be omitted.
Having now particularly described and ascertained the nature of this said inven
tion & in what manner the same is to be performed, as communicated to me by my
foreign correspondent I declare that what I claim is :-
1. The fabric-waterproofing compound composed of a mixture of boiled
vegetable oil and cooked animal's blood, substantially as described.
2. The fabric-waterproofing compound composed of a mixture of boiled
vegetable oil, cooked animal's blood and petrolatum, or its equivalent, substantially
as described.

page_text: 3. The fabric-waterproofing compound composed of boiled vegetable oil
cooked animal's blood, petrolatum, or its equivalent, and coloring matter.
substantially as described.
4. As a new article of manufacture, a waterproof fabric comprising textile
fabric and a coating thereon composed of a mixture of boiled vegetable oil, and
cooked animal's blood, substantially as described.
5. As a new article of manufacture, a water-proof fabric comprising textile
fabric and a coating thereon composed of a mixture of boiled vegetable oil, cooked
animal's blood and petrolatum, or its equivalent, substantially as described.
6. As a new article of manufacture, a waterproof fabric comprising textile
fabric and a coating thereon composed of a mixture of boiled vegetable oil,
cooked animal's blood, petrolatum, or its equivalent, and coloring matter,
substantially as described.
Dated this 30th day of January 1896.
BOULT & WADE,
Agents for the Applicant.