IMPROVEMENTS IN THE MANUFACTURE OF SUBSTITUTES FOR LEATHER
Year: 1884

page_text: · PROVISIONAL SPECIFICATION.
I MAXIMILIAN ZINGLER of 19 Buckland Crescent Belsize Park in the County
of Middlesex Fellow of the Chemical Society do hereby declare the nature of
my Invention for "IMPROVEMENTS IN THE MANUFACTURE OF SUBSTITUTES FOR
LEATHER" to be as follows:―
The object of this invention is to manufacture all such commercial articles for
which leather is used viz: solid leather for Soles beltings straps saddlery bags
portmanteaus upholstery and the like.
For heavy solid leathers I make a composition of the following materials-
Gutta percha substitute as described and called Gum percha in the Specification
of my Patent No 1153-19th March 1882.
Gum percha
Powdered waste rubber
India rubber
Sulphur of Antimony
Peroxide of Iron
Flower of Sulphur
Lime
-
-
31 lbs
3/
"
-
1
"
"
"
lb. 4 ounces
"
"
Asbestos powder
Sulphuret of Zinc
Carb. Magnesia
2
.
"
-
"
-
11
3¹ "
"
The compound of these materials which for convenience of reference I will
call "A" is then worked through mixers or iron rollers and when thoroughly
amalgamated placed under a vulcanizing press and vulcanized for an hour or more
at about 280° Fahrenheit.
For light solid leather-in lieu of Asbestos I use finely powdered wood fibres-
in preference cocoa nut or other nut shell finely powdered or especially Cuscus
roots.
Although the above chemical compound can be worked with India rubber alone
without Gum percha the quantities should remain the same.
For machine belts I prepare first the canvas by placing the same for several
hours in a bath of an aqueous solution of Ammonia or Soda alum 1 lb for every
six gallons of water-I drain it and place it then in a bath of an aqueous solution
of sulphate of zinc 1lb. for every five gallons of water and leave the same for

page_text: 24 hours or longer-then drain it and let it dry. I then dissolve in a sufficient
quantity of naphtha the above mentioned chemical compound "A" (only leaving
out waste rubber).
Having given the canvas several coatings according to the thickness required
I then let it dry for a day or two, then fold the canvas in different sizes from 1 to 1
12 inches wide and from 2 to 12 plies.
When thus completed I pass the belt through the vulcanizing press from half an
hour to 1/2 hour at different degrees of Fahrenheit from 250° to 280°.
For stout leatherine I proceed as follows:-
On the canvas or calico as above prepared I apply on one surface a thin sheet of
the following composition :
India Rubber
7 lbs.
Substitute" as mentioned in the Specifica-
tion of my Patent No 242-15th January 2,
1883 under the heading of Oxidised Oil
Sulphate of Antimony
Sulphur
Peroxide of iron
Sulphate of Zinc
Carb. Magnesia
Sulphate of Baryta
-O
AD
-
3
I
12 oz
"
”
21 lbs.
5
2 "
4 ounces
12 oz.
The compound formed with these materials I call "B," in the same way as the
composition "A" it is rolled out in sheets of various thicknesses and placed on
the canvas-then vulcanized fine for half an hour cooled and then again for another
half an hour.
•
For thin leatherines I prepare the canvas or calico in the manner as described
above for machine belts then coat it with a thin solution of india rubber and apply
thereon thin sheets of the preparation "B"-then vulcanize as before.
I give variety of colors by mixing with the above chemicals pigments of various
colors and substituting these for sulphuret of antimony or peroxide of iron-
according to the shades of color required.
DLL: 70th