Improvements in the Manufacture of Rubber Balls, and a Method of Ornamenting the same.
Year: 1889

page_text: Date of Application, 24th Apr., 1889
Complete Specification Left, 24th Jan., 1890-Accepted, 1st Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Rubber Balls, and a Method of
Ornamenting the same.
I KARL MÜNZINGER, Manufacturer of Rubber Goods of Schwabing, near Munich
in the Empire of Germany do hereby declare the nature of this invention to be as
follows:-
One of the lenticular or other cut pieces of which the rubber ball is to be made
receives a small hole over which is attached a thin soft rubber tube say about
3 centimeters in length extending towards the interior. Then for the time being
before the ball is put together the tube is completely turned inside out and placed
outward. The vulcanizing is performed as usual and a desulphuration by means of
lixiviation or if the India rubber is to be so called patent. Indiarubber the ball is
vulcanized by chloride of sulphur in the known manner by means of said tube, by
pouring in the liquid mixture and by pouring out the portion not absorbed and also
by dipping the outside of the ball into the vulcanizing liquid drying and desulphurating
by lixiviation.
The desulphuration by lixiviation renders the ball more solid and prevents it from a
too early oxydation. This is impossible with balls without the described tube
contrivance because they have inside stoppers made of natural india rubber which are
pierced through for the purpose of blowing the balls, and which must then auto-
matically close again as firmly as possible and this property is lost by the use of the
necessary vulcanizing liquor. Therefore ordinary balls made of so-called patent india
rubber cannot be vulcanized inside but only on the outer surfaces because they have
to be closed perfectly secure before being vulcanized.
In the improved method when the vulcanization and lixiviation is completed the
ball is expanded by blowing through the tube the latter is tied up airtight at the outer
end, and for better security an airtight caoutchouc or rubber cap is placed over the
tube. The tube is then reversed so that it will be completely inside the ball.
If it is desired to ornament the balls the process is varied as hereinafter described.
Every indiarubber ball in order to have a true shape is vulcanized in a hollow
mould consisting of two hemispheres. In the face of these hollow moulds, recessed
cuttings of the desired design are made. As these figures are naturally convex a
plane projection or plan taken of them in order to be able to cut or punch out the
correct designs from the indiarubber sheet used therefor.
The figures thus obtained are laid in the cuttings of the ball mould and coated with
benzine when the ball is now placed in the ball mould in the usual manner the former
presses against the wall of the mould and becomes insolubly connected with the
various figures placed in the recesses of the mould.
In this manner one obtains designs and figures of different colours with distinct
outlines on the ball.
Dated this 21th dow of Anvil 1080

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Rubber Balls, and a Method of
Ornamenting the same.
I KARL MUNZINGER, Manufacturer of Rubber Goods of Schwabing near Munich
in the Empire of Germany 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 the manufacture of rubber balls and to the method of
ornamenting the same. According to this invention one of the lenticular or other
shaped pieces of which the rubber ball is to be made is provided with a small hole
over which is attached a thin soft rubber tube of say about 3 centimetres length
extending from that side which shall be on the interior of the ball. This tube for the
time being before the ball is put together is turned inside out so that it is directed
outward. The vulcanizing is perforined as usual and desulphuration by means of
lixiviation or if the india rubber is to be so called "patent" indiarubber the ball is
vulcanized by chloride of sulphur in the known manner by means of said tube, by
pouring in the liquid mixture and by pouring out the portion not absorbed and also
by dipping the outside of the ball into the vulcanizing liquid drying and desulphurating
by lixiviation.
The desulphuration by lixiviation renders the ball more solid and prevents it from
too early oxydation. This is impossible with balls without the tube contrivance above
described because they have inside stoppers made of natural indiarubber which are
pierced through for the purpose of blowing the balls and which must then auto-
matically close again as firmly as possible and this property is lost by the use of the
necessary vulcanizing liquor. Therefore ordinary balls made of so called patent
indiarubber cannot be vulcanized inside but only on the outer surfaces because they
have to be closed perfectly secure before being vulcanized.
In the improved process when the vulcanization and lixiviation is completed the
ball is expanded by blowing through the tube the latter is tied up air tight at the
outer end and for better security an air tight caoutchouc or rubber cap is placed over
the end. The tube is then reversed so that it will lie completely within the ball.
If it is desired to ornament the balls the process is varied as hereinafter described.
Every india rubber ball in order to have a true shape is vulcanized in a hollow
mould consisting of two hemispheres. In the faces of these hollow moulds recesses of
the desired design are made. As these figures are naturally convex a plane projection
or plan is taken of them in order to be able to be able to cut or punch out the correct
designs from the india rubber sheet used therefor.
The figures thus obtained are laid in the recesses of the mould and coated with
benzine.
When the ball is now placed in the mould in the usual manner, the ball presses
against the wall of the mould and becomes insolubly connected with the various
figures placed in the recesses of the mould. In this manner designs and figures of
different colours with distinct outlines may be obtained on the ball.
If the figures were to be fastened on as described after the vulcanizing they would
not hold, if they were attached before vulcanizing without the process above described
the outlines would lose their sharpness, they would disfigure the ball and their purpose
would not be obtained for this reason.
(1.
In the accompanying drawing Fig. 1 is a sectional view of the lenticular parts of
which the ball is composed. a being the tube aforesaid. Fig. 2 shows the ball blown
and the tube a tied and covered with a cap previous to being turned within the ball.
Fig. 3 shows a ball ornamented with raised designs in the manner hereinbefore
mentioned.

page_text: 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
In the manufacture of rubber balls.
1. The method of providing the ball previous to its being put together with a soft
india rubber tube over a hole of the ball, said tube being first turned outward during
vulcanizing and lixiviation of the ball in the known manner and after the ball is
blown tied up, air tight, provided or not provided with a caoutchouc cap and turned
inside the ball substantially as set forth.
2. The method of providing the balls with raised designs in different colours if
desired by placing suitably cut india rubber blocks or pieces, coloured or otherwise
into corresponding recesses of the ball moulds to be used and coating them with
benzine and causing them to adhere insolubly to the ball substantially as set forth.
حويلية
1
↓
T
1000
HERBERT & Co.,
18, Buckingham Street, Strand, W.C., Agents to Applicant.
HERBERT & Co.,
18, Buckingham Street, Strand, W.C., Agents to Applicant.