Improved Mechanism for Pressing and Rolling Plastic Substances, the same being specially applicable for Use in the Treatment of Crude India-rubber.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improved Mechanism for Pressing and Rolling Plastic Substances,
the same being specially applicable for Use in the Treatment of
Crude India-rubber.
I, HENRY CROFTS LONGSDON of the Firm of W. Summerscales and Sons
Limited, of Keighley in the County of York, Engineers and Machine Makers,
do hereby declare the nature of this invention to be as follows, that is to say :-
It relates to improved mechanism for pressing and rolling plastic substances said
mechanism being specially applicable for use in the treatment of crude india-
rubber, and the object of my invention is to produce mechanism that shall be
sufficiently firm and unyielding to withstand any work it has to perform and yet
that shall allow any moisture or liquid that may exude therefrom to freely flow
away.
To attain this object 1 mount a pair of rollers, preferably of cast iron or of
other unyielding metal or substance, in suitable framework on which I also arrange
appropriate mechanisms for driving and imparting pressure to them.
The peripheries of these rollers are firstly made smooth throughout, and then
grooves are cut spirally or longitudinally therein so that on the rollers being
rotated and the substances to be acted upon being applied thereto these rollers are
better prepared for laying hold thereof to drag same between them, while the
openings of the grooves .form suitable channels for the flowing of the exuding
liquid which is conducted therefrom by any suitable drip board arrangement.
The grooves or furrows in the rollers are preferably made spirally thereon so as
to intersect each other as this arrangement enhances their gripping power and also
their efficiency for conducting the liquid away.
Provided the substance is required to have ridges or corrugations on its surface
then the rollers are furrowed to produce this effect.
In connection with the pressure regulating mechanism an appropriate stopping
device is employed for preventing said mechanism from being operated to put too
great a pressure upon the substance under operation, this being of great utility
when such substance is crude india-rubber in acting upon which it is possible to
exercise too much pressure, and this stopping device may consist either of a
projection on the framework of the machine or a suitably formed piece attached
to or in connection with the pressure regulating screw.
Dated this 11th day of September 1895.

page_text: Improved Mechanism for Pressing and Rolling Plastic Substances,
the same being specially applicable for Use in the Treatment of
Crude India-rubber..
I, HENRY CROFTS LONGSDON of the Firm of W. Summerscales and Sons
Limited, of Keighley in the County of York, Engineers and Machine Makers,
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 aud by the following
statement, that is to say :-
It relates to improved mechanism for pressing and rolling plastic substances said
mechanism being specially applicable for use in the treatment of crude india-
rubber, and the object of my said invention is to produce such mechanism as shall
be sufficiently firm and unyielding as will enable it to withstand any work it has to
perform and yet so that it will allow any moisture or liquid that may exude
therefrom to freely flow away.
In the accompanying sheets of drawings which are illustrative of my
invention:-
Figs. 1 and 2 are front and end elevations of a machine made in accordance with
my invention.
Fig. 3 is end elevation of said machine as seen in the direction indicated by
arrow A and shows the opposite end to the one illustrated by Fig. 2.
Fig. 4 is a drawing in detail to an enlarged scale showing a portion of the
machine's rollers as made in accordance with my improvements.
Fig. 5 is a top view of a part of the machine and shows parts hereinafter
explained.
To attain the object of my invention I mount a pair of rollers a b which are
preferably of cast iron or of other unyielding metal or substance, in suitable
framework c on which I also arrange appropriate mechanisms as the hand-wheel d
with its gearing wheels e on one side to enable the machine to be manually operated
or the pulleys f with their gearing wheels g on the other side for enabling same to
be operated by power as will be well understood.
C
I further arrange on this framework the necessary devices, as the screwed rod /
(carrying the hand wheel k by which it is to be manually operated) the levers mm¹
and springs n n¹ for imparting pressure to the rollers a and b.
The peripheries of these rollers a and bare firstly made smooth throughout and
then grooves p are cut spirally therein as shown by Fig. 4, or these grooves p may
be cut longitudinally in these rollers a and b as shown by Fig. 44, so that on the
rollers being rotated aid the substances to be acted upon being applied thereto
these said rollers a and b are better prepared for laying hold thereof to drag same
between them, while the openings of the grooves p form suitable channels for the
flowing of the exuding liquid which is conducted therefrom by any suitable drip-
board arrangement as those at s or as may be desired.
The grooves p are preferably made spirally on the rollers a 6 as shown by
Figs. 1 and 4, and further these spiral grooves p are made to intersect each other
since this arrangement enhances their gripping powers and also their efficiency for
conducting the liquid away.
Provided the substance acted upon is required to have distinctive ridges, grooves
or corrugations or other distinctive markings made on its surface then I form the
grooves or ridges on the rollers a and b to produce the effect desired.
In connection with the pressure regulating mechanism an appropriate stopping
device is employed such as the projecting pieces t¹ on the levers mm² or the collar
or fixed hoopvl (shown in br. ken lines Fig. 1) on the screwed rod h, the former
t

page_text: being arranged to abut against the framework cand the latter against the screwed
nut to when the hand wheel & has been rotated to increase the pressure of the
springs n n¹ upon the rollers ab to the desired extent, by which means the user is
prevented from putting too great a pressure upon the substance being treated, this
being of great importance when such substance is crude india-rubber.
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 :-
1. The improved machine for pressing and rolling plastic substances the same
being constructed or formed substantially as herein specified.
2. In machines for pressing and rolling plastic substances the combination of
rollers having their peripheries grooved as described, means for transmitting motion
to these rollers and framework for supporting same substantially as herein
specified.
3. In machines for pressing and rolling plastic substances the combination of
rollers, driving mechanisın for operating these rollers and pressure regulating
mechanism this latter being arranged and constructed substantially as herein
specified.
L 114
1000
H. C. LONGSDON,
Per Samuel Hey,
Agent.