Improvements in the Dressing or Coating of Cloth or Canvas for Making Waterproof Covers of all kinds, such as Tarpaulins, Van Covers and Sheets, Railway Sheets, Drivers' Aprons, Horse Loin Cloths, and other Articles.
Year: 1897

page_text: Date of Application, 27th Oct., 1897.
Complete Specification Left, 25th July, 1898-Accepted, 27th Aug., 1898
PROVISIONAL SPECIFICATION.
Improvements in the Dressing or Coating of Cloth or Canvas for
Making Waterproof Covers of all kinds, such as Tarpaulins, Van
Covers and Sheets, Railway Sheets, Drivers' Aprons, Horse Loin
Cloths, and other Articles.
I, THOMAS POTTER COUBRO, of the Firm of Coubro and Scrutton, Tarpaulin
Makers, of 11, West India Dock Road, Limehouse, in the County of Middlesex,
do hereby declare the nature of this invention to be as follows;-
This invention relates to improvements upon an invention for which Letters
Patent No. 16953 of the year 1892, were granted to me and according to which a
non-drying or non-oxidizing oil was applied to cloth, canvas &c. when dry, as a
preliminary treatment in the preparation of waterproof cloth and also to improve-
ments on an invention for which Letters Patent No. 21838 of the year 1893
were granted to myself and Russel Aitken, according to which the required
quantity of non-drying or non-oxidizing oil taken up by the cloth treated, was
regulated by mixing the non-oxidizing or non-drying oil with naphtha or other
solvent which is capable of being evaporated off the said oil after application
to the cloth, canvas &c.
In practice it has been found that by having a non-oxidizing oil in the cloth
or canvas it leaves the surface in a moist and oily condition which is found
objectionable.
My invention consists in mixing with the first coat of either black, tan, green,
yellow or other colored patent dressing with a non-drying or non-oxidizing oil
and applying same to cloth or canvas, it being found that by so doing the said
uon-drying or non-oxidizing oil permeates into the cloth or canvas so treated and
consequently such cloth or canvas does not crack or break when doubled up, but
is perfectly watertight, supple and soft with the surface quite dry and fit to
take the usual top coat of dressing.
This preliminary treatment of the first coat of dressing with a non-drying or
non-oxidizing oil prevents cloth from sticking together when folded, and also
prevents spontaneous heating and causes it to last longer in wear.
By this process I am enabled to dress any width of cloth in the piece or bolt,
it being found after such dressing and subsequent drying that on account of its
pliability it can be sewn together either by hand or machine as easily as un-
dressed cloth, with the advantage that such first coating can be done without
driers and in fine weather during the summer and stored until required for
making into covers of any size, such storage improving the cloth by allowing
the dressing to thoroughly harden, storage being possible by this treatment, as
the cloth does not stick together, harden or heat spontaneously.
It is also found that by this softening process strong hard woven sail cloth
can be dressed and used for waterproof covers without cracking or breaking as
hitherto, as well as cloth made from hemp or other harsh material.
Dated October 27th 1897

page_text: Improvements in the Dressing or Coating of Cloth or Canvas for
Making Waterproof Covers of all kinds, such as Tarpaulins, Van
Covers and Sheets, Railway Sheets, Drivers' Aprons, Horse Loin
Cloths, and other Articles.
I, THOMAS POTTER COUBRO, of the Firm of Coubro and Scrutton, Tarpaulin
Makers, of 11, West India Dock Road, Limehouse, in the County of Middlesex,
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 improvements upon an invention for which Letters
Patent No. 16953 of the year 1892, were granted to me and according to which a
non-drying or non-oxidizing oil was applied to cloth, canvas &c. when dry, as a
preliminary treatment in the preparation of waterproof cloth and also to improve-
ments on an invention for which Letters Patent No. 21838 of the year 1893,
were granted to myself and Russel Aitken, according to which the required
quantity of non-drying or non-oxidizing oil taken up by the cloth treated, was
regulated by mixing the non-oxidizing or non-drying oil with naphtha or other
solvent which is capable of being evaporated off the said oil after application
to the cloth, canvas &c.
In practice it has been found that by having a non-oxidizing oil in the cloth
or canvas it leaves the surface in a moist and oily condition which is found
objectionable.
My invention consists of mixing the first coat of either black; tan, green, yellow
or other colored thinned patent dressing with a non-drying or non-oxidizing oil
and applying same to cloth or canvas, it being found that by so doing the said
non-drying or non-oxidizing oil permeates into the cloth or canvas so treated
and consequently such cloth or canvas does not crack or break when doubled up,
but is perfectly watertight, supple and soft with the surface quite dry and fit
to take the usual top coat of dressing.
The following proportions are what I have found to answer well in practice;
viz. to every 20 gallons of thinned patent dressing I add 1 gallon of pure
mineral oil, usually known as "heavy mineral oil" and apply the same to the
cloth or canvas as a first coating.
I do not however confine myself to the use of this particular class of non-
oxidizing oil nor to the proportions stated.
This preliminary treatment of the first coat of dressing with a non-drying or
non-oxidizing oil prevents cloth from sticking together when folded, and also
prevents spontaneous heating and causes it to last longer in wear.
By this process I am enabled to dress any width of cloth in the piece or bolt,
it being found after such dressing and subsequent drying that on account of its
pliability it can be sewn together either by hand or machine as easily as un-
dressed cloth. Such first coating can be done without driers and in fine weather
during the summer and stored until required for making into covers of any
size, such storage improving the cloth by allowing the dressing to thoroughly
harden, storage being possible by this treatment, as the cloth does not stick
together, harden or heat spontaneously.
It is also found that by this softening process strong hard woven sail cloth
can be dressed and used for waterproof covers without cracking or breaking as
hitherto, as well as cloth made from hemp or other hard material.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. The improved method of dressing or coating canvas or cloth for making
waterproof articles consisting of mixing with the first coat of patent dressing a
suitable quantity of non-drying or non-oxidizing oil and applying the same
to the cloth or canvas, substantially as herein described and for the purpose
stated.
2. The improved method of dressing or coating canvas or cloth for making
waterproof articles by mixing with the first coat of patent dressing a suitable
quantity of non-drying or non-oxidizing oil and applying the same to the cloth or
canvas, allowing the same to dry and applying the usual top coat of dressing
substantially as herein described and for the purpose stated.
Dated this 25th day of July 1000
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.