other Substances Impermeable or for Protecting them from Injury by Moisture.
Year: 1886

page_text: Date of Application, 24th Aug., 1886.
Complete Left, 13th Apr., 1887.
Complete Accepted, 17th May, 1887.
other Substances Impermeable or for Protecting them from
Injury by Moisture.
I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature of
this invention to be as follows:-
This invention relates to improved means for rendoring textile fabrics and other
substances impermeable, or for protecting them from injury by moisture.
The said invention is based upon the property which acetate of alumina, in a dry
state, has of ropelling water as well as fatty bodies, without, however, having the
appearance thereof, the said acetate of alumina, when introduced into fabrics by means
of baths, rendering them impermeablo. But this property, upon which many
processes of waterproofing have been based, has not given satisfactory results in
point of durability. The acetate of alumina, being in the fibres of the fabric in the
form of an impalpable powder, becomes detached in time by friction, and destroys the
impormeability..
According to this invention, I retain this impalpable powder by means of a pitchy
varnish, insoluble and not powdery, without, however, obstructing the pores of the
fabric. This substance, according to the nature of the fabric and its colour, is applied
to the fabrics, in either a dry or hot state, after they have been subjected to baths of
acetate of alumina, soap and alum, and after they have been dried in a drying stove
at a temperature of 30 degrees centigrade.
The soap bath is composed of either a solution of soap of 1, 2 or 3% or of an
emulsion of soap, paraffin and resin.
The bath of alum is prepared with 4% of alum.
For treating cloth, the bath of acetate of alumina must be preceded by a gall-nut
| bath in a manner well known to dyers. After this preparatory treatment, the fabric

page_text: is placed upon a metallic plate heated to between 36 and 40 degrees centigrade, but
not beyond that. It is then treated with the following composition viz. paraffin
60 grammes, wax 30 grammes vaseline 15 grammes. These proportions vary
according to the nature and thickness of the fabric.
To this composition can be added, a metallic soap, such as soap of iron, copper,
zinc or the like, according to the dye to be obtained.
By the use of this preparation, the pores of the fabric can be completely stopped
The fibres of the fabric must not, however, in general be covered with too thick
a layer; it being sufficient to impregnate the fibres therewith.
up.
This preparation can serve for rendering paper, wood, paste-board and the like
impermeable and for protecting metals from oxidation.
For treating leather, hides and boots and shoes or the like, I use the preceding
composition alone or together with metallic soaps, modified according to the nature of
the leather and hidos.
This composition serves also for preventing ropes from rotting, as water does not
penetrate them; and it also serves for the manufacture of awnings.
Dated this 24th day of August 1886
HASELTINE; LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements relating to Means for Rendering Textile Fabrics and
other Substances Impermeable or for Protecting them from
Injury by Moisture.
I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, 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 improved means for rendering textile fabrics and other
substances impermeable or for protecting them from injury by moisture.
The said invention is based upon the proporty which acetate of alumina in a dry
state has of repelling water as well as fatty bodies, without however having the
appearance thereof, the acetate of alumina when introduced into fabrics by means of
baths, rendering them impermeable. But this property, upon which many processes
of waterproofing have beon based has not given satisfactory results in point of
durability. The acetate of alumina, being in the fibres of the fabric in the form
of an impalpable powder becomes detached in time by friction and destroys the
impermeability.
According to this invention [retain this impalpable powder by means of a pitchy
varnish, insoluble and not powdery, without however obstructing the pores of the
fabric.
This substance according to the nature of the fabric and its colour, is applied to the
fabrics in either a dry or hot state after they have been subjected to baths of acetate
of alumina, soap and alum, and after they have been dried in a drying stove at a
temperature of 30 degrees Centigrade.
The soap bath is composed of either a solution of soap of 1, 2 or 3%, or of an
emulsion of soap, paraffine and resin.
The bath of alum is prepared with 4% of alum.
For treating cloth the bath of acotate of aluminu must be preceded by a gall nut
bath in a manner well known to dyers. After this preparatory treatment the fabric is
placed upon a metallic plate heated to between 36 and 40 degrees Centigrade, but not
beyond that. It is then treated with the following composition viz. :-paraffine
60 grams, wax 30 grams, vaseline 15 grams. These proportions vary according to
the nature and thickness of the fabric.
To this composition can be added, a metallic soap, such as soap of iron, copper,
zinc or the like according to the dye to be obtained.
By the use of this preparation, the pores of the fabric can be completely stopped
up. The fibres of the fabric must not, however, in general be covered with too thick
a layer; it being sufficient to imprognate the fibres therewith.
This preparation can serve for rendering paper, wood, pasteboard, and the like
impermeable and for protecting metals from oxidation. For treating leather, hides,

page_text: boots and shoes or the like, I use the preceding composition alone or together with
metallic soaps, modified according to the nature of the leather and hides.
This composition serves also for proventing ropes from rotting, as water does not
penetrate them; and it also serves for the manufacture of awnings.
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 correspondent, I declare that what I claim is :-
First The process herein beforo described of rendering textile and other fabrics
impermeable, the said process consisting essentially in successively treating the said
fabrics in baths of alumina, soap and alum, and after drying, coating or impregnating
them with a composition of paraffine, wax and vaseline, with or without metallic
soap.
Second-The improved composition consisting of paraffine, wax and vaseline in the
proportions substantially as hereinbefore described for rendering paper, cardboard and
other materials impermeable or protecting them from injury by moisture.
Dated thi 19th J
A 1007
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.