Improvements in the Manufacture of Embossed Sheets, applicable for Decorating Walls, Ceilings, and such like.
Year: 1896

page_text: Date of Application, 22nd June, 1896
Complete Specification Left, 20th Mar., 1897-Accepted, 19th June, 1897
Improvements in the Manufacture of Embossed Sheets, applicable
for Decorating Walls, Ceilings, and such like.
I, HOWARD ASTON ALLPORT, of Dodsworth Grove, Barnsley, in the County of
York, Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to improve the manufacture of sheets applicable for
decorating walls ceilings and such like from sheets of asbestos or a mixture of asbestos
with other materials.
For embossing the asbestos- sheets I employ flat plates or it might be rollers
prepared in the following mauner: In the case of plates one plate is formed of a flat
plate of metal having a design engraved or otherwise formed in intaglio upon it.
The other plate is formed by first dressing the engraved surface of this plate with
several coats of pure copal varnish or other similar material and then pressing or
kneading uncured vulcanite compound or a mixture of asbestos and vulcanite
compound by hand into the indentations of the pattern on the metal plate.
The compound I employ is preferably made up of a mixture of india rubber with
metallic oxides, sulphur and other matters. The following is a mixture suitable for
The ferric oxide is preferably prepared from copperas sulphate of iron which is first
dried, and then burnt in suitable ovens at such a temperature as to get the required
shade. All traces of acid are removed and finally it is ground and dried. It has a
percentage of 99 % oxide of iron.
When the indentations in the engraved plate have been filled in with the above
compound I lay over it a thick flat sheet of the same material covering the entire
plate and over this a plate of iron or other metal of the same area as the engraved
plate and I subject the whole to considerable pressure in an hydraulic press. I then
securely clamp the whole together and place it in an oven which may be heated by
dry heat or by high pressure steam and subject it to heat for several hours this having
the effect of hardening the vulcanite. The whole is then unclamped, the plates lifted
apart, and the result is that I have a vulcanite male plate adhering to a plate of -'iron.

page_text: or other metal the pattern on which accurately corresponds with the pattern on the
engraved metal or femal plate, except that the parts of the pattern are somewhat less
in dimensions than the parts of the engraved pattern by reason of these having been
coated with the several coats of varnish.
Afterwards when the varnish has been cleaned off from the engraved plate I use the
plates for embossing the sheets of asbestos or of asbestos mixed with other materials.
To do this I place the sheets when in a moistened soft state between the two plates
and compress the whole in an hydraulic press.
Rollers are manufactured in a similar manner.
Improvements in the Manufacture of Embossed Sheets, applicable
for Decorating Walls, Ceilings, and such like.
I, HOWARD ASTON ALLPORT, of Dodsworth Grove, Barnsley, in the County of
York, Civil Engineer, 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 object of this invention is to improve the manufacture of sheets applicable for
decorating walls ceilings and such like from sheets of asbestos, or a mixture of asbestos
with other materials.
For embossing the asbestos sheets I employ flat plates or it might be rollers
prepared in the following manner: In the case of plates one plate is formed of a flat
plate of metal having a design engraved or otherwise formed in intaglio upon it.
The other plate is formed by first dressing the engraved surface of this plate with
several coats of pure copal varnish or other similar material and then pressing or
kneading uncured vulcanite compound or a mixture of asbestos and vulcanite
compound by hand into the indentations of the pattern on the metal plate.
The compound I employ is preferably made up of a mixture of india rubber with
metallic oxides, sulphur and other matters. The following is a mixture suitable for
the purpose
The ferric oxide is preferably prepared from copperas sulphate of iron which is first
dried, and then burnt in suitable ovens at such a temperature as to get the required 45.
shade. All traces of acid are removed and finally it is ground and dried. It has a
percentage of 99 % oxide of iron.

page_text: When the indentations in the engraved plate have been filled in with the above-
compound I lay over it a thick flat sheet of the same material covering the entire plate
and over this a plate of iron or other metal of the same area as the engraved plate and
I subject the whole to considerable pressure in an hydraulic press. I then securely
clamp the whole together and place it in an oven which may be heated by dry heat or
by high pressure steam and subject it to heat for several hours this having the effect
of hardening the vulcanite. The whole is then unclamped, the plates lifted apart, and
the result is that I have a vulcanite male plate adhering to a plate of iron or other
metal the pattern on which accurately corresponds with the pattern on the engraved.
metal or female plate, except that the parts of the pattern are somewhat less in.
dimensions than the parts of the engraved pattern by reason of these having been.
coated with the several coats of varnish.
Afterwards when the varnish has been cleaned off from the engraved plate I use
the plates for embossing the sheets of asbestos or of asbestos mixed with other
materials. To do this I place the sheets when in a moistened soft state between the
two plates and compress the whole in an hydraulic press.
Rollers are manufactured in a similar manner.
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 manufacture of embossed sheets of asbestos or a mixture of asbestos with
other material by compressing a sheet of the material when in a soft state between an
engraved plate or roller and a plate or roller formed to fit it substantially in the
manner described.
2. The manufacture of plates or rollers for embossing sheets substantially of the
materials and in the manner described.
3. The manufacture of embossed sheets substantially as described.
D
HOWARD A. ALLPORT..