IMPROVED MACHINE FOR GRINDING AND DOUGHING INDIA-RUBBERS AND THEIR COMPOUNDS FOR SPREADING PUR- POSES, LIKEWISE SUITABLE FOR PAINTS AND OTHER MATERIALS
Year: 1876

page_text: LETTERS PATENT to John Heald, of Chorley, in the County of Lancaster,
Engineer, for the Invention of "IMPROVED MACHINE FOR GRINDING AND
DOUGHING INDIA-RUBBERS AND THEIR COMPOUNDS FOR SPREADING PUR-
POSES, LIKEWISE SUITABLE FOR PAINTS AND OTHER MATERIALS."
aled the 20th April 1877, and dated the 25th October 1876.
PROVISIONAL SPECIFICATION left by the said John Heald at the Office
of the Commissioners of Patents on the 25th October 1876.
JOHN HEALD, of Chorley, in the County of Lancaster, Engineer. " IMPROVED
MACHINE FOR GRINDING AND DOUGHING INDIA-RUBBERS AND THEIR COMPOUNDS
FOR SPREADING PURPOSES, LIKEWISE SUITABLE FOR PAINTS AND OTHER
MATERIALS."
This machine has for its object the more effectual doughing of india-rubber and
their compounds for spreading purposes, it is likewise adapted for grinding paints
or other such like purposes.
I know there has been a machine for these purposes in existence for some years, one
used by Messrs. James Quin & Co., of Leyland; these machines were very inefficient,
requiring one man's constant attention, and their having but two grinding rollers,
both driven at even speeds; there was little friction at grinding surface, conse-
quently but little material was doughed or ground. By my improved machine I
can produce ten times the amount in the same time, much better done, and one
man can easily attend to five machines, they are likewise compact and portable.
I provide two outside standards and frames, through which I pass any number of
stretcher or distant bolts regulated by lock nuts and distanced according to the
length of the rollers; suitable box or bearings are provided in these standard frames
to carry three or more grinding rollers, the centre or main rollers is placed in or
near the middle of the lower part of such standard frames, under which is a receiver.
This roller is made hollow so that I may pass steam or hot water for heating pur-
poses and cold for cooling purposes; over or round the upper part of this centre
roller are two or more smaller rollers driven from the main roller at such speeds
that a grinding surface is formed between such rollers and the main roller, all of
which are leading from front to back of the machine in their grinding action.
These rollers are regulated by set screws too or from centre roller; in the front or
I Price 6d1

page_text: near the centre of the main roller I fix a V or other groove edge plate, into which
V or other groove I fix a strip of leather or other equivalent which embraces the
roller in front which prevents any material from falling into the box below or from
passing along with roller; this plate likewise forms the bottom of the hopper
or box on that side of the machine. This groove plate is adjusted by screws; on
the other side of such roller I place a beviled edge plate similarly adjusted which
forms a scraping edge to take off the material which passes along with the rollers;
this plate forms the bottom of the hopper or box on the other side of the machine.
The machine is driven by spur bevil friction or other gearing, or by bands or
cords, and is made liquid-tight; guide pieces are fixed in the box, and work so as
to turn over the material more to the centre of rollers. Guide pieces are also
fixed below to turn the ground material into the receiving box below; I may, in
some instances, use a false bottom in the receiver box, I can also fix the V grooved
edge and beviled edge plates in any diagonal position, and for small machines I
may use only two instead of more rollers.
"
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Heald in the Great Seal Patent Office on the 24th April 1877.
IMPROVED
JOHN HEALD, of Chorley, in the County of Lancaster, Engineer.
MACHINE FOR GRINDING AND DOUGHING INDIA-RUBBERS AND THEIR COMPOUNDS
SPREADING PURPOSES,
FOR PAINTS
FOR
MATERIALS."
LIKEWISE
SUITABLE
AND
OTHER
Fig. 1 is an end view of my improved machine with the regulating screws and
nuts for regulating top rollers. Fig. 2 is a side view of the same, showing
internal flanges for guiding the material into the reciever underneath the machine,
the side slide board being removed. Fig. 3 is the other end view of the same with
gear wheels for driving.
Fig. 4 is a cross section showing knife and scraper with position of rollers and
partition which forms a complete hopper or receiver. Fig. 5 is a plan showing the
general arrangement of the same.
Fig. 6 is a section of one end of top rollers a, a, and slides b.
A, in Figs. 1, 2, 3, 4 and 5 are the side frame plates of the machine, on which are
cast slide guides g 1 for holding the slides C in their places; B, B, in same Figures,
are the headstocks for carrying the machine; C, C, are two slides, one fiting on to
knife c and the other fiting on the breast bar e; D, D, D, D, are stay bolts with
regulating nuts; E, E, are slide boxes cast on the sides A, with screws F, F, for
regulating the two top rollers a, a; G, G, G, G, are set screws for regulating the
knife c and breast bar e; H, H, H, are wheels for driving top rollers a, a; I, I, is
the main driving gear. The sizes of these will be determined by the speed the
machine is required to run; likewise, the sizes of the wheels H will be guided by
the relative speeds required of the several rollers which may require changing to
suit the various materials to be operated upon. J is the main or central roller.
These three rollers are ground together with oil and emery so as to make them run
close that nothing may pass between them unground.
a, a, in Figs. 1, 2, 4, and 5, are the two top rollers, which may be regulated to
any distance from main or central roller by screws F, F, swiveled into sliding
blocks b; c is a knife in front of the machine, which is set to any distance from the
main roller to prevent any unground material from passing to the reciever under
the machine; & is an agitating roller of any convenient size and shape to keep the
material from settling or clogging the delivery at the knife edge of the machine.
This knife may be set at any angle; e is a breast plate or bar, in the edge of which
is a groove into which I fit a piece of soft or elastic material which presses against
the main roller at the back of the machine; f is a partition forming a complete

page_text: hopper; g, g, are flanges underneath the rollers for conducting the ground material
to the reciever below, as shown in Figs. 2 and 4.
Having fully described the several parts of my machine and their purposes I will
now proceed to describe its action.
The material designed to be doughed or ground is put into hopper K, which is
stired up by agitator roller d passing between first roller a and main roller J, as
indicated by arrow, and thence between second roller a 1, these rollers being set at
proper distances from main roller J, the fine or ground portion then pass thence
between the main roller J and breast bar e, round till it comes to knife c which
scrapes it cleanly off the main roller J into the reciever underneath the machine. A
stream of cold water or steam may be passed through the main roller J, either to
keep it cold or make it warm, as the nature of the material ground may require.
I have now fully described the whole in detail and its action, but desire it to be
distinctly understood that I do not confine myself to the precise details I have
had occasion to refer to, as many variations may be made in detail without
deviating from the principle or inain features of my Invention, but what I claim as
secured to me herein is,-
First. The sliding blocks b, box E, swivel ended regulating screw F, for
regulating top rollers, substantialy, as and for the purposes herein-before set forth.
Second. Knife c, with its regulating arrangements and agitating roller d, sub-
stantialy as and for the purposes herein-before set forth.
Third. The arrangement of stay bolts with regulating nuts and ribs for, and the
wood or other sides C to slide down, which forms the ends of the machine, sub-
stantialy as and for the purposes herein-before set forth.
Fourth. The partition f for forming a complete hopper, substantialy, as and for
the purposes herein-before set forth.
Fifth. The internal flanges g, g, underneath the rollers for conducting the ground
material to the reciever below, as shown in Figs. 2 and 4. Likewise the regulating
arrangement fixed for breast bar c, with cushion for stripping main roller J, sub-
stantialy as and for the purposes hercin-before set forth.
In witness whereof, I, the said John Heald, have hereunto set my hand and
seal, this Tenth day of April, in the year of our Lord One thousand eight
hundred and seventy-seven.
Witness,
JOHN LEWIS,
Engineer,
Preston,
Lancashire.
JOHN (L.S.) HEALD.