Improved Waterproof Paper.
Year: 1890

page_text: Date of Appication. 21st Nov.. 1.90
Complete Specification Left, 15th Aug., 1391-Accepted, 19th Sept., 1891
PROVISIONAL SPECIFICATION.
Improved Waterproof Paper.
I, ALFRED ASSHETON HAIGH, of the "Oaks," Greenheys Lane Manchester,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
The improvements refer to waterproof paper, and have for object the rendering
of paper waterproof in a simple, cheap and effective manner, by covering, or
spreading over the surface, on one or both sides, the composition, compound or
material herein described.
To accomplish this, and to effect my improvements, employ rosin, or resin, in
combination with a substance or compound known in the trade as "Almedina,"
which rosin and Almedina" I dissolve in and with naptha, using such quantities
of each as are required to produce the consistency of the proofing desired to
be obtained, but by preference having about three parts of rosin to one of
"Almedina."
"Almedina" is a substance which derives its name from the person who first
collected it.
::
This substance, which is known by some persons in this country by the name of
potato rubber "
is the juice or sap of a tree, (probably allied to the india-rubber
tree) growing in South West Africa, and is mostly moulded by hand into the
form of potatoes for shipment, and is at present little used for any purpose in
the arts.
This mixture or compound may be employed alone or in combination with other
materials for colouring or other purposes.
In practice, I prefer to grind or pulverize the rosin together with any colour
pigments, or other substances employed, into a powder, and mix along with the
Alinedina" then I add thereto naptha, until the desired consistency is obtained,
preferably the consistency of paste for most purposes. But this may be varied to
suit the different fabrics subjected to the process.
Various modes of applying the mixture to the paper may be adopted, but I mostly
prefer to use the material to be operated upon in the length or roll, which is drawn
under the knife or blade passing across the width thereof.
This knife blade or "doctor" spreads the proofing material or compound on the
paper, which is then passed over heated cylinders, or pans, or other means whereby
the drying is effected, when the proofed material is ready for use. Such mode of
spreading substance upon fabrics is already well known and in use, and forms no
part of my invention, as the compound may be spread upon the paper by brushes,
or other means.
By the employment of the substances named, for this purpose, I obtain a pliable,
cheap and effective waterproof paper, which may be employed for various useful
purposes.
Dated this 20th day of November 1890
WILLIAM GADD. C.E..
64, Barton Arcade, Manchester, Agent.
64, Barton Arcade, Manchester, Agent.
COMPLETE SPECIFICATION.
Improved Waterproof Paper.
I, ALFRED ASSHETON HAIGH, of the "Oaks," Greenleys Lane, Manchester,
Manufacturer, 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 :-
The improvements refer to waterproof paper, and have for object the rendering

page_text: of paper waterproof in a simple, cheap and effective manner, by covering or
spreading over the surface, on one or both sides, the composition, compound or
material herein described.
To accomplish this, and to effect my improvements, I employ rosin, or resin, in
combination with a substance or compound known in the trade as
65 Almedina,"
which rosin and "Almedina" I dissolve in and with naphtha, or other suitable
solvent or spirit, using such quantities of each as are required to produce the
consistency of the proofing desired to be obtained, but by preference having about
three parts of rosin to one of "Almedina."
"Almedina is a substance which derives its name from the person who first
collected it.
::
This substance, which is known by some persons in this country by the name
of potato rubber is the juice or sap of a tree, (probably allied to the india-
rubber tree) growing in South West Africa, and is mostly moulded by hand into
the form o potatoes for shipment, and is at present little used for any purpose in
the arts.
The mixture or compound may be employed alone or in combination with other
materials for colouring or other purposes.
In practice, I prefer to grind or pulverize the rosin together with any colour
pigments, or other substances employed, into a powder, and mix along with the
Almedina;" then I add thereto naphtha, until the desired consistency is obtained,
preferably the consistency of paste for most purposes. But this may be varied to
suit the different fabrics subjected to the process.
Various modes of applying the mixture to the paper may be adopted, but I
mostly prefer to use the material to be operated upon in the length or roll which
is drawn under the knife or blade passing across the width thereof.
This knife blade or "doctor" spreads the proofing material or compound on the
paper, which is then passed over heated cylinders, or pans, or other means whereby
the drying is effected, when the proofed material is ready for use.
Such mode of
spreading substance upon fabrics is already well known and in use, and forms no
part of my invention, as the compound may be spread upon the paper by brushes,
or other means.
By the employment of the substances named, for this purpose, I obtain a pliable,
cheap and effective waterproof paper, which may be employed for various useful
purposes.
Although I prefer to employ three parts of rosin or resin to one part of
Almedina," I would have it clearly understood that considerable variation in the
proportions of the two substances can be made, along with variations in the
thickness and quality of paper so treated, without departing from the peculiar
character of the invention.
Having now particularly described and ascertained the nature of my said inven
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
:-
Waterproof paper prepared by coating paper with the compound of rosin or resin
and Almedina or potato rubber, dissolved in naphtha or the like, substantially
as herein described.
Dated this 14th day of August. 1891
WILLIAM GADD, C.E.,
64, Barton Arcade, Manchester, Agent.