Improvements in the Manufacture of Waterproof Material for Bags and other Articles.
Year: 1888

page_text: Date of Application, 12th Nov., 1888
Complete Specification Left, 12th Aug., 1889-Accepted, 12th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Waterproof Material for Bags
and other Articles.
1 ROBERT STONE of 8 Talbot Court, in the City of London, Engineer, do hereby
declare the nature of my said invention to be as follows:-
My invention consists in a novel method of manufacturing a material for Bags, and
other purposes and in machinery and appliances for carrying the same into effect.
I make the bags of any size or dimensions, and of hemp, flax, tow, cotton, or any
fibrous or other material or I may use wire netting.
In order that they may resist damp I coat the material with a composition made
from china clay, glass, marble, spar, burnt and ground to form a composition, enamel
paint, or any other like matorial or substance may be used; or I use cement or
plaster mixed with tar, laid on hot; or 1 use any of the foregoing materials, or such
like materials, mixed with oil or driers, collectively or separately, or I use ordinary
the Bugs
paint, or any composition or Indin rubber or gutta percha, that will sent up
or material so as to protect the material filled into them from damp or damage, on
the voyage. Such bags will become very useful for cement, plaster, grain, china
clay, or any other powder or material, requiring to be kept free from damp or
damage; the composition or paint can be laid on with a Brush; and pressed into the
material by rolls. The seams of the bags can be made in the usual way, or wire
sewn, or rivetted.
When burning the materials I form the furnace or kiln of sheet iron lined inside
with fire bricks or fire proof materials. In this iron cylinder 1 form two doors to
work up and down, through which the materials when burnt can be drawn, or it may
In order to
be drawn underneath; I also form blast or air holes in the sides.
expedite loading of the material into the furnace, I fit an inclined rail to the top of
the furnace, on which a tip wagon is worked by an endless chain or otherwise.
In order to grind the material to a fine powder, I use one large plain roll turned
on the face, with one or more small rolls working against its periphery at a high
speed. I sometimes use the corrugated or plain rolls of equal diameters and run one
roll faster than the other, io secure fine crushing or grinding, or 1 may use cored rolls
fitted on the same principle as the plain rolls before mentioned. In the gearing of
the cog wheels 1 fix reverse falling weights to secure velocity and power.
The 10th 1000
ROBERT STONE.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Waterproof Material for Bags
and other Articles.
I ROBERT STONE, of 8 Talbot Court in the City of London, Engineer, do hereby
declare the nature of my said invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
The object of my invention is to render bags water and fire proof; such bags being
specially suitable for containing cement, plaster, grain, china clay, or any other
powdered material, requiring to be kept free from damp or damage.
The bags may be of any suitable size, and formed of hemp, flax, tow, cotton, or
other fibrous material, or of woven wire.
In carrying out my invention 1 coat the material of which the bags are made, with
a composition made from one or any mixture of two or more of the following

page_text: materials, viz. China clay, marble, spar, shale, Staffordshire clay, Devonshire clay,
cement or plaster, or any other analogous material. Any one or any mixture of two
or more of such substances is or are mixed with sufficient tar to render the same fluid
and capable of being laid on hot with a brush. I sometimes add oil to thin the
material and driers to assist in rendering the same sufficiently firm and hard.
The aforesaid mixture, after being laid on with a brush, is pressed into the material
by means of rollers.
The seams of the bags may be made in the usual manner, or wire sewn or rivetted.
Or the seams may be made with sheet metal or leather, or any other suitable material,
to secure a close and strong seam. The mouths of the bags may be closed and
secured by means of rivets, wire, or cord.
In preparing the materials as aforesaid, I subject the China clay, marble, spar,
shale, Staffordshiro clay, Devonshire clay, and any other analogous material to the
heat of a furnace, at a high temperature, and afterwards grind and pulverize the same,
in order to render the same suitable for the above purpose.
The material may be colored with any suitable coloring matter according to
requirements.
As an example of the proportions (more or less) in which I mix the materials for
T
When the material is required of a high red color I mix a sufficient quantity of
vermillion in oil or liquids of a like nature, prior to mixing the same with the ground
material; by this method 1 secure a high and lasting color.
In order to impart a red color to the material, I may also mix vitriol and sulphate
of iron with the material before burning :-also other colors may be obtained by
mixing vitriol and oils with the material.
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 :
1. The waterproof material or composition for bags and other articles substantially
as and for the purnose bereinbefore described.