Improvements in or connected with Machines or Mills for Grinding and Mixing Colour, Paints, or other Materials.
Year: 1894

page_text: Date of Application, 14th Sept., 1894
Complete Specification Left, 14th June, 1895-Accepted, 20th July, 1895
PROVISIONAL SPECIFICATION.
Improvements in or connected with Machines or Mills for Grinding
and Mixing Colour, Paints, or other Materials.
I. EDMUND BUSH of Stratford Street, Dewsbury Road, Leeds, in the County
of York, Engineer, do hereby declare the nature of this invention, to be as
follows:-
My invention has particular reference to what are known as "ink mills," for
grinding colour to be employed on lithographic or printing machines; but it is
also applicable to other classes of machines for grinding paints or other materials.
The object of this invention is to grind and mix colour more efficiently and in
considerably less time than heretofore, at the same time the machine requires very
little attention when working, and is silent in its action.
.
According to my invention I provide a plough on each side of the main roller,
which ploughs are mounted in suitable bearings on the frame of the machine in
such a manner as to be capable of adjustment up to or against the roller flange,
and this with any required degree of pressure. These ploughs have the effect of
constantly feeding the ink towards the centre of the machine, thus effectually
preventing such ink working over the ends of the rollers and onto the bearings.
By this means the ink is not discoloured by mixing with the oil on the roller
bearings, and the constant attendance hitherto required in cleaning off the ink
from the ends of the said rollers is entirely obviated.
In order to keep the rollers perfectly cool during the grinding operation,
I preserve a constant flow of water through the main roller, at the same time such
roller is kept continually full during the operation of grinding. This is effected
by connecting a supply pipe to one end of the roller, whilst at the opposite end of
the said roller an outlet pipe is attached, a cock or valve is provided on the outlet
pipe for regulating the flow, and the amount of flow or opening of the outlet is
denoted by means of an indicator in connection with the said valve.
means the rollers are kept perfectly cool, consequently the natural colour of the
ink under operation is not impaired, at the same time the ink does not stick to the
rollers, and the machine thus runs freely and in a clean state.
By this
I make the machine considerably stronger than hitherto, and gear the rollers so
as to run at different speeds, which have the effect of more efficiently grinding the
ink in considerably less time than hitherto, as the ink by these means only requires
putting through the machine about half the number of times hitherto necessary,
thus preserving the lustre of the colour.
The ordinary spur gearing at present employed for imparting motion to the
rollers is dispensed with, and I actuate the main roller by means of worm and
worm wheel gearing, thus obtaining a more uniform speed and a machine that is
silent when in action.
Dated this 14th day of September 1894.

page_text: Improvements in or connected with Machines or Mills for Grinding
and Mixing Colour, Paints, or other Materials.
I, EDMUND BUSH, of Stratford Street, Dewsbury Road, Leeds, in the County
of York, Engineer 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 :-
My invention has particular reference to machines known as "ink mills," for
grinding colour to be employed on lithographic or other printing machines ; but it
is also applicable to other machines for grinding paints or other materials.
The object of this invention is to grind and mix colour, more efficiently and in
considerably less time than heretofore, whilst at the same time the machine requires
very little attention when working, and is silent in its action.
In order that my invention may be clearly understood, will proceed to describe
same with reference to the accompanying drawings, in which similar letters refer
to like parts in all the figures.
Figure 1, is a side elevation of a machine constructed according to my invention,
and Figure 2, is a plan of same.
A is a driving shaft of the machine, which carries a worm A', and fast and
loose pullies A2, A3; and the worm A¹ gears with a worm wheel B which is mounted
on the hollow trunuion C of the main roller D. The main roller D is hollow, and
in open communication with the trunnions C, C', and to the ends of the said
trunnions a supply pipe E and outlet pipe F are provided, for the purpose of
circulating water in the interior of the roller D. A stop cock E' is provided on
the pipe E for regulating the inlet, and an index valve is fitted to the pipe F,
to regulate the outlet, the finger F2 enabling the valve Fi to be set so as to keep
the flow of water at any required speed. G and H are grinding rollers which are
mounted in adjustable bearings J and K, situated in the side frames of the machine,
and the said adjustable bearings J and K, enable the rollers G and H to be adjusted
to or from the main roller D as required. The roller D is provided with
flanges D, D', which work in contact with the sides of the rollers G and H.
L and M are spur wheels, which are mounted on the trunnion C', the spur wheel L
gearing with a spur wheel N situated on the trunnion of the roller G, whilst the
spur wheel M gears with the spur wheel P mounted on the trunnion of the roller H.
The rollers G and H, are thus driven from the main roller D, with their surfaces
moving in a similar direction; but owing to the difference in size of the wheels of
the spur gearing, the roller G is driven at a slower speed than the roller D, whilst
the roller H is driven at a higher speed, thus causing a grinding action to take
place between the surfaces of the said rollers. R is a removing board, the front
edge of which works in contact with the roller H; and R' is a regulating screw,
for adjusting the said board towards or away from the roller H. S, S, are ploughs
having suitably shaped edges to fit the surface of the roller D and the inside and
periphery of the flange D'; and the said ploughs are adjustably mounted on
brackets S, S', which enables them to be set to any desired position. Adjustable
guide boards T, T, are provided for confining the ink to the desired width on the
rollers when being ground on the machine.
In setting the machine to work, the paint to be ground is placed in the groove
between the rollers D and G, being held to the required width by the boards T, T;
and the cock E' is turned on, thereby admitting water to the interior of the main
roller D, the finger F2 being set to regulate the flow of water through the said
roller. The machine is then set in motion, the ink being ground between the
rollers and being gradually carried through the machine to the removing board R,

page_text: where it is received from the roller S. During this grinding operation, the rollers
are kept quite cool by the circulation of water in the main roller D, thus preventing
the ink from sticking to the rollers, and preserving the natural colour of the ink
under operation and owing to the strength of the framework and the rollers, the
latter may be adjusted so firmly against each other, that several grinding operations
can be saved in the preparation of the colour.
As the ink works out towards the edges of the rollers, the ploughs collect it
and divert it towards the centre of the machine, thus effectually preventing the
said ink from working over the ends of the rollers onto the bearings, and becoming
discoloured by mixing with the oil. This continual diverting of the ink, is a great
saving, as the machine does not require the constant attention of an operator, to
keep the ends of the rollers free from ink. The driving of the machine through
worm gearing A' and B, makes the same run quite silently, and thereby prevents
the noise occasioned by machines hitherto employed.
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. In mills for grinding colour, paints, and other materials, the main cylinder
driven by worm gearing and having the interior hollow for the circulation of water,
substantially as set forth.
2. In mills for grinding colour, paints, and other materials, the combination of
the hollow roller D, hollow trunnions C, C', supply pipe E with its stop cock E,
outlet pipe F with its index valve F¹ and finger F2, substantially as set forth.
3. In mills for grinding colour, paints, and other materials, the ploughs S
adjustably mounted on the brackets S', whereby the colour is fed from the sides
to the centres of the rollers, substantially as set forth.
4. The general arrangement, construction, and combination, of the various parts,
forming my invention for improvements in or connected with machines or mills for
grinding and mixing colour, paints or other materials, substantially as and for the
purposes set forth.
Dated this 14th day of June 1895.