Improvements in Apparatus for Separating Foreign Substances from Waste Rubber, Bark, Grain, and other Materials.
Year: 1893

page_text: Date of Application, 16th Sept., 1893
Complete Specification Left, 18th June, 1894-Accepted, 4th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Separating Foreign Substances from
Waste Rubber, Bark, Grain, and other Materials.
I, JOSEPH ANDERSON, Junior of the Firm of Joseph Anderson & Sons,
Clayton, Manchester, Manufacturing Chemist, do hereby declare the nature of
my said invention to be as follows:-
My invention consists of new or improved apparatus for separating foreign
matter from waste rubber in the process of its recovery for new manufacturing
purposes, say metal eyelets, nails and the like from old rubber goloshes, rubber
shoes, etcetera. Such apparatus is also applicable for separating foreign matter from
bark, grain, and for other like purposes.
In accordance with my invention I employ a, by preference oblong sheet of woven
wire or gauze, surrounded by a framing of wood or the like and producing a tray
formation, hereinafter called the "tray." Said tray is arranged at an angle and is
so mounted as to be capable of oscillating or moving to and fro in a by preference
horizontal direction under the influence of a crank or eccentric mounted on a
revolving shaft.
Arranged transversely across the gauze or woven wire and at suitable distances
apart is a number of strips of wood or ridges which stand above the surface of the
gauze or wire, so producing angles or recesses therewith.
Upon this device and by preference at the top end thereof is placed the substance
to be treated which in the case of rubber would be in a pulverised state and
containing the foreign matter. The apparatus being set in motion the said
substance gradually descends to the foot of the tray, whilst the foreign matter
(nails, eyelets, etcetera) gravitates on to the wire or gauze and as it also descends
becomes arrested by the transverse strips or ridges before mentioned. Owing to
the movement and angle of the tray the substance under treatment naturally
passes over each of the ridges until it reaches the foot of the tray, where it
discharges into a receptacle placed to receive it.
To arrest the foreign matter more effectually the front edges of the transverse
strips are "under-cut," and to keep the substance more thoroughly agitated a rod
may be employed between each set of strips or ridges with forks or projections
depending into the substance.
To facilitate the removal of the arrested matter that portion of the woven wire
immediately in front of each strip may be formed as a channel, the bottom of the
channel, by preference sloping to one side of the frame so that the arrested
matter may work its way to a suitable discharge outlet at the deeper end of the
channel.
A ribbed or fluted plate or other similar device may be used in lieu of the woven
wire, but I prefer the woven wire on account of its elastic qualities which facilitate
the agitation of the substance under treatment.
It must be observed that the wire or gauze is sufficiently fine to prevent a sieving
or screening action, although a separate screening apparatus may be employed
therewith to screen the substance as it is delivered from the tray.
Dated this 15th day of September 1893.

page_text: Improvements in Apparatus for Separating Foreign Substances from
Waste Rubber, Bark, Grain, and other Materials.
I, JOSEPH ANDerson, Junior, of Bank Street, Clayton, near Manchester,
Manufacturing Chemist, do hereby declare the nature of my said invention and in
what manner the same is to be performed to be particularly described and ascertained
in and by the following statement :---
My invention consists of a new or improved apparatus for separating foreign
matter from rubber waste in the process of its recovery for new manufacturing
purposes, say, metal cyclets, nails, and the like, from old rubber goloshes, rubber
shoes, etcetera. Such apparatus is also applicable for separating foreign matter
from bark, grain, and for other like purposes.
"
In accordance with my invention I employ a, by preference, oblong sheet of wire
or gauze, surrounded by a framing of wood or the like and producing a tray
formation, hereinafter called the "tray.' Said tray is arranged at an angle and is
so mounted as to be capable of oscillating or moving to and fro in a by preference,
horizontal direction under the influence of a crank or eccentric mounted on a
revolving shaft.
Arranged transversely across the gauze or woven wire and at suitable distances
apart is a number of strips of wood or ridges which stand above the surface of the
gauze or wire, producing therewith angles or corners.
Upon this device and at the top end thereof is placed the substance to be treated,
say, rubber waste which would be in a pulverised state and mixed with foreign
matter which it is desirable to abstract. The apparatus being set in motion the
said rubber gradually shakes down or travels to the foot of the tray, whilst the
foreign matter (nails, eyelets, etcetera) being of heavier specific gravity than
the rubber shakes through the mass onto the wire or gauze and becomes arrested
by the transverse strips or ridges before-mentioned as they tend to travel onward.
Owing to the movement and angle of the tray the rubber under treatment being
lighter passes over each of the strips in succession until it reaches the foot of the
tray where it discharges into a receptacle placed to receive it.
To arrest the foreign matter more effectually the front edge of the transverse
strips are "under-cut" and to keep the substance more thoroughly agitated a rod
may be employed between each set of strips or ridges with forks or projections
depending into the substance.
To facilitate the removal of the arrested matter that portion of the woven wire
immediately in front of each strip may be formed as a channel, the bottom of the
channel by preference, sloping to one side of the frame so that the arrested
matter may work its way to a suitable discharge outlet at the deeper end of the
channel.
A ribbed or fluted plate or other similar device may be used in lieu of the woven
wire, but I prefer the woven wire on account of its elastic qualities which facilitate
the agitation of the substance under treatment.
The object of the wire gauze is not to screen or sieve the substance though it
may act slightly in that way, but I have found it to be the most suitable material
for the bottom of the tray.
And in order that my said invention shall be the more readily understood and
carried into practical effect I have hereunto annexed two sheets of drawings and
will now proceed to describe the same with the assistance of the various figures
and letters of reference marked thereon.
On Sheet 1 Fig. 1 is a perspective view of the general arrangement of my
improved separating apparatus. Fig. 2 is a transverse section and Figs. 3
and 4 longitudinal sections respectively.

page_text: " is
My invention consists essentially of a "tray" (A.) formed by preference of
woven wire or gauze stretched upon a wood frame (B). This "tray
arranged at an angle or sloping within a framing (C) and so mounted as to slide or
oscillate, by preference horizontally. For this purpose the tray is fitted with anti-
friction bowls or runners (D) bearing upon rods or rails (E) fixed to the frame (C),
but I do not confine myself to this method of carrying the tray, for instance, it
might be hung from the frame by suitable side rods or chains. The "tray" is, by
preference, connected to a connecting rod (E) to a revolving crank or disc (F) so
that a rapid to and fro motion in a horizontal direction is imparted to the tray. I
have found a speed of about 200 oscillations per minute and a movement of
three inches to give good results.
Arranged transversely across the gauze or wire and at suitable distances apart,
are a number of strips of wood or ridges (G) (see Fig. 3) which form obstructions,
ridges or angles with the gauze and which are an essential feature of my invention.
These strips of wood for my purpose are best under-cut as illustrated and the
foreign matter arrested by the strips, lies in the angle or pocket formed by the
undercut portion and the gauze. In order to facilitate the removal of the foreign
matter the gauze may be shaped just in front of each strip to form a pocket as
illustrated, and the bottom of this pocket or channel may slope to one side of the
tray (sec transverse section Fig. 2) where an opening may be formed for the
foreign matter to pass out and be collected in bags or boxes hung on to the side of
the tray or mounted in any other convenient manner.
In operating my invention say as applied to treating waste india-rubber to
remove the nails and metallic impurities generally therefrom, I feed the rubber
in a pulverised state on to the top end of the tray at (X) and the crank
action having previously been set going, the rapid to and fro motion causes the
rubber to travel down the tray toward the lower end (Z) but the heavier
impurities such as nails, eyelets, etcetera by the jigging action and their greater
specific gravity tend to find their way to the bottom of the substance and
finally on the gauze, and in travelling down the gauze are arrested by the gauze,
and in travelling down the gauze are arrested by the strips and retained in the
pocket or passes out into the bags or boxes. The purer material being lighter
passes over the strips and is finally discharged at the end (Z) of the tray into
a box or receptacle.
It will thus be seen that my invention essentially consists of a tray placed,
The transverse
by preference, at an angle and agitated by any suitable means.
obstructions are placed across the tray so that the material traversed along by
the shaking tends to drop its heavier particles which are caught and retained by
the transverse obstructions whilst the lighter and purer material passes forward.
I do not therefore confine myself to the precise form of obstruction described and
illustrated for instance the bottom of the gauze might be formed as in Fig. 4 in
which the ridges would form the obstruction and the metallic products would
collect in the hollows or depressions, but I do not find this so effective as the
arrangement described. I have also found it advantageous in the case of rubber
to insert one or more sets of forks or openers hanging down from the main frame
into the substance to keep it open, but it will be apparent that this might not be
necessary in all cases.
It will be obvious that this invention is applicable to the treatment of other
substances than india-rubber waste and could be used in other cases where it is
desirable to separate heavy and light substances.
Having thus 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.―
1st. In the treatment of rubber waste for the separation of metallic and other
impurities of heavier specific gravity therefrom, the use of the tray aforesaid
arranged at an angle, provided with transverse strips or other obstructions and

page_text: mounted and operating substantially as and for the purposes herein before described
and illustrated on the accompanying drawing.
2nd. The use of the separating apparatus hereinbefore described for the
treatment of substances other than rubber waste substantially as and for the
purposes herein before described and illustrated on the accompanying drawing.
Dated this 15th day of June 1894.
JOHN G. WILSON & Co.,
Agents.