Improvements in the Manufacture of Parts of Toys and other Articles from India Rubber.
Year: 1894

page_text: Date of Application, 23rd Oct., 1894
Complete Specification Left, 22nd July, 1895-Accepted, 24th Aug., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Parts of Toys and other
Articles from India Rubber.
I THEODORE BIRNBAUM, of Wick Lane Rubber Works, Bow, in the County
of London, India Rubber Manufacturer do hereby declare the nature of this
invention to be as follows:-
This invention relates to improvements in the manufacture of parts of toys and
other articles made from india rubber so as to form "joints" and the like.
The method of manufacture I adopt is to cut up into pieces of appropriate
shape and size, sheet rubber suitably prepared. These pieces are formed into a
tube and are drawn over a suitable mandril having projections corresponding with
the portions of the tube to be jointed.
The intervening portions of the tube between the joints may be stiffened by
means of smaller pieces applied to the inner side of the tube before the same is
closed up or if convenient these stiffeners may be applied to the outer side of the
tube after closing.
to
I cut up small pieces adapted to cover about the parts of the first named pieces
where a "joint" is to be formed. These latter pieces are then "solutioned"
the former pieces at those places. The larger part with the attached pieces is then
applied over a suitably shaped mandril, after it has been made tubular and
solutioned into said tubular form by its edges. On this mandril this tube is tied
above and below the part of joint to be caused to project, by means of soft strings
and it is when so secured partially cured or "vulcanized."
From the mandril the rubber tube, now indented by the ties, is removed and
folded at the creased parts or indents into a contracted from, placed in a holder
which retains it in the position contracted, or cramped, into which it is to be set,
and so held it is put into the curing chamber, fully cured and thereby set
permanently into the contracted position.
When air or other fluid is, under pressure, forced into the contracted tube thus
made; if its ends be stopped up the tube will be extended and when the pressure is
removed it will resume its contracted form.
This method of manufacture is adapted for parts of inflatable india rubber
apparatus such as the legs, or limbs or other parts of diving frog toy and other
india rubber goods.
Dated the 23rd day of October 1894.
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicant.

page_text: made: if its ends be stopped up the tube will be extended, and when the pressure
is removed it will resume its contracted form.
This method of manufacture is adapted for parts of inflatable india rubber
apparatus such as the legs, or limbs or other parts of diving frog toy and other
india rubber goods.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is.
1. The improvements in the manufacture of parts of toys and other articles of
india rubber so as to form joints and the like by forming tubes, or tubular forms,
thickened or stiffened at places from pieces of sheet rubber, shaping and treating
the same partly on mandrils, or formers, and finally curing the said formed parts in
the normally contracted or folded form desired in suitable holders or clamps,
substantially as set forth.
2. The manufacture of joints or like parts of toys or other articles of india
rubber from patched or thickened sheets formed into tubular parts, and curing and
shaping the same with the aid of mandrils or preliminary formers and cramps or
holders, substantially as set forth.
Dated the 22nd day of July 1895.
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicant.