Improvements in the Manufacture of Parts of Toys and other Articles from India Rubber, and in Apparatus employed therein.
Year: 1895

page_text: Date of Application, 1st July, 1895
Complete Specification Left, 31st Mar., 1896-Accepted, 6th June, 1896
PROVISIONAL STECIPATION,
Improvements in the Manufacture of Parts of Toys and other
Articles from India Rubber, and in Apparatus employed
therein.
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 is designed to simplify and expedite the manufacture of parts of
toys and other articles of india rubber.
In carrying out my invention I form the parts of the article into a conical tube
from sheet rubber suitably prepared or treated and cut to shape, cementing the
opposite edges of the pieces to form the tube.
To render explanation more simple I will take a particular instance of an article
of manufacture, say, a leg of a rubber toy frog. This leg, now in the form of a
tube of slightly conical form is, with the aid of apparatus to he described, folded
and held folded into appropriate shape, during further treatment or curing, in a
heated chamber until the required change or vulcanization of the rubber has
taken place and at the same time the folded rubber part has taken a permanent
tr set "in the shape in which it is held in the clamp.
6
"
This clamp consists of two, or other number of metal, or heat resistent, bars,
capable of being brought into, and held in, correct relative position by clips or
fastenings. Each bar (for a frog leg) is so shaped towards its inner ends with
distance pieces, or only one bar may be so provided, leaving a central space and
at intervals this space is enlarged by notching or recessing one, or both, or each of
the bars.
In this space the (frog leg) tube is folded to and fro and finally held gripped
between the bars. Those parts of the tube which are required to be compressed
(at parts afterwards to be inflated) vertically are located between the plain parts
of the bars, those parts to form the folds or joints are arranged outside the bars
and those parts to be compressed sidewise so as to enlarge them vertically and
compress then horizontally are arranged to lie in the notches, or recesses in
the bars.
As it is difficult to arrange the said parts, consisting as they do of pieces of
very elastic material, in series in such a shaping or moulding device with uniformity
and celerity without some mechanical aid I have devised the following stand, or
holder, for use until the clamp is full and locked in a closed position. The
holder consists, for the purpose cited, of a table having a longitudinal slot into
which the lower bar is partly inserted and at the ends of this table, or board, are
slotted plates to receive both bars at their ends and guide and retain them in correct
relation.
Adjacent to the slot in the board on each side are arranged upstanding pins in
series set at distances apart according to the requirements of the case.
The clamp when filled and locked can be safely handled with its contents,
removed from the holder, conveyed to the vulcanizing chamber, held during the
curing in proper supports and thence removed and the goods removed.
•

page_text: The shapes and arrangements of the separate parts will be varied according to
the vulcanized rubber articles to be shaped, held and cured.
Dated the 1st day of July 1895.
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Parts of Toys and other
Articles from India Rubber, and in Apparatus employed
therein.
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 and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :—
This invention is designed to simplify and expedite the manufacture of parts of
toys and other articles of india rubber.
In carrying out my invention I form the parts of the article into a conical tube
from sheet rubber suitably prepared or treated and cut to shape, cementing the
opposite edges of the pieces to form the tube.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 shows a piece of sheet rubber suitably prepared or treated and cut to
shape suitable for forming into a conical tube for the purpose hereinafter described.
Fig. 2 shows the same by an edge view.
Fig. 3 is a side view of a conical tube formed by cementing together the opposite
edges of the piece of sheet rubber shown in the two previous figs.
Fig. 4 is an end view of the tube.
Fig. 5 shows a front view of apparatus for the manufacture of the parts of india
rubber toys according to this present invention. A portion of the apparatus is
broken away for the convenience of the drawings.
Fig. 6 shows the same apparatus by a plan view.
Fig. 7 shows an india rubber leg of a toy frog (as will be afterwards described)
in an extended position.
To render explanation more simple I will take a particular instance of an article
of manufacture, say, a leg of a rubber toy frog.
"
This leg, in the form of a tube of slightly conical form is with the aid of apparatus
to be described, folded and held folded into appropriate shape, during further treatment
or curing, in a heated chamber until the required "change or vulcanization of
the rubber has taken place and at the same time the folded rubber part has taken
a permanent "set in the shape in which it is held in the clamp.
"
This clamp consists of two, or other number of metal, or heat resistent, bars a, b,
capable of being brought into, and held in, correct relative position by clips or
fastenings c, c. Each bar (for a frog leg) is so shaped towards its inner ends with
distance pieces d, d, or only one har may be so provided, leaving a central space e,
and at intervals this space is enlarged by notching or recessing one or both, or
each of the bars, as at e¹, e', e¹.
In this space the (frog leg) tube f is folded to and fro and finally held gripped
between the bars a, b. Those parts of the tube which are required to be
compressed (at parts afterwards to be inflated) vertically are located between the
plain parts of the bars, those parts to form the folds or joints are arranged outside
the bars and those parts to be compressed sidewise so as to enlarge them vertically
and compress them horizontally are arranged to lie in the notches or recesses el
in the bars.

page_text: As it is difficult to arrange the said parts consisting as they do of pieces of very
elastic material, in series in such a shaping or moulding device with uniformity and
celerity without some mechanical aid I have devised the following stand or holder,
for use until the clamp is full and locked in a closed position. The holder consists,
for the purpose cited, of a table g having a longitudinal slot into which the lower
bar bis partly inserted and at the ends of this table, or board, are slotted plates h
to receive both bars at their ends and guide and retain them in correct relation.
Adjacent to the slot in the board on each side are arranged upstanding pins i in
series set at distances apart according to the requirements of the case.
The clamp
when fitted and locked can be safely handled with its contents, removed from the
holder, conveyed to the vulcanizing chamber, held during the curing in proper
supports, trays and the like and thence removed and the goods removed.
The shapes and arrangements of the separate parts will be varied according to
the vulcanized rubber articles to be shaped, held and cured.
In the Specification of a former Patent granted to me and dated October 23rd
1894 No. 20218, I have described a method of apparatus for the manufacture of
parts of toys and other articles wherein patched or thickened sheets formed into
tubular parts were put upon mandrils tied thereon and semi cured and the mandrils
were afterwards withdrawn and the forms clamped up into the forms it was desired
they should retain when vulcanized and herein I make no claim to the method there
described.
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 the parts of toys and other articles from indiarubber.
1. The method of manufacturing contractible limbs or parts from plain tubular
sections or parts not necessarily thickened or patched, without any preliminary
moulding being required and both the jointing and the cross sectional moulding
and the proper retention of the parts in position being performed at one operation
as set forth.
2. The hereinbefore described method of manufacturing said parts into the form
of conical or other tubes from sheet rubber suitably prepared and treated and cut
to shape cementing the opposite edges of the pieces to form the tube, folding same
into appropriate shape in a suitable holder and curing same whilst so held in a
properly heated chainber as set forth.
3. The construction and use for the purpose aforesaid of clamp apparatus as set
forth.
4. The method of construction and the use of clamp apparatus for the manufacture
of parts of toys and other articles from india rubber as set forth.
Dated the 31st day of March 1896.
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicant.