Improved Combined Mixing and Grinding Mill for Paints and the like.
Year: 1894

page_text: Date of Application; 22nd Dec, 1894
Complete Specification Left, 4th July, 1895-Accepted, 10th Aug, 1895
PROVISIONAL SPECIFICATION
An Improved Combined Mixing and Grinding Mill for Paints and
the like.
A communication by JULIUS SCHMIDT, of 13 Thierschstrasse, Munich, in the
Empire of, Germany, Manufacturer.
1, WILLIAM PHILLIPS THOMPSON, F.C.S., MI.M.E., of The Ageucy for
Foreign Patent Solicitors, 6, Lord Street, Liverpool and 6, Bank Street,
Manchester, both in the County of Lancaster and 31 High Holborn in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this
invention to be as follows:-
In producing, paints on a manufacturing scale the processes employed for mixing
the colours, with oil, and grinding the same, have each hitherto been performed
separately, either by means of two different machines or by the colours and oil
being mixed by hand by the. workman; the product thus obtained being thon
conveyed into a paint mill for the purpose of being ground.
This invention allows of both the above mentioned processes being. carried.out
with one apparatus, which has, the advantage of rendering,munecessary a second
machine or its being necessary for the workman to mix the paints by hand, as
this takes place in a much more thorough and even manner by means of the device
hereinafter described.
The apparatus consists of a colour or paint mill having a hopper in the bottom
piece of which hopper is a grinding cone rotating on a.vertical spindle.
The spindle is driven from a horizontal shaft by means of bevel gearing, this
shaft revolving in either direction.according as it is coupled to.one or the other of
two pulleys of which one is duiven with a straight belt and the other with a crossed
belt.
Above the grinding cone and in the neck of the actual hopper, a two-winged
heater or scoop of iron or the like material,, is arranged on, the spindle, which
beater or scoop engages by means of two lugs or the like in suitable grooves in
the hopper and is thus fixed. Over this fixed beater or scoop, are arranged several
other beaters or scoops spirally one above, the other on the spindle and attached
to the latter by means of set screws or the like. The beaters on scoops, may bo
made each with two pairs of arms or wings but are formed, preferably however
alternately with single and double pan's of wings.
The arms of the successive beaters or scoops form such angles with one another
that a large number of beaters (for instance five) are contained on the periphery
in one full turn of the shaft. The arms of the beaters or scoops are bevelled off or
inclined and constructed of such form as to be adapted to mix the material in the
hopper when rotated in one direction and to feed the mixed material downwards to
the grinding cone when rotated in the other direction.
If colour and oil be introduced into the hopper with the object of being mixed;
a thorough stiring and mixing, of the colour and oil takes place if the spindle be
caused to rotate in an opposite direction to that necessary for operating, the
grinding, cone. If the cther driving, belt be then brought into action the spindle
revolves in the opposite direction and the grinding cone comes into action; the
colour mixed with oil is successively conveyed to the grinding cone by, the
scoops or paddles, and then passes out from the bottom of the hopper thoroughly
ground.

page_text: The form of construction of the paint mill hereinbefore described may be modified
to admit of the apparatus being driven from below and by hand. It is obvious also
that in an apparatus so modified, the driving may take place by means of suitable
gearing from a motor in the same way as above described
Dated this 21st day of December 1894.
An Improved Combined Mixing and Grinding Mill for Paints and
the like.
A communication by JULIUS SCHMIDT, of 13, Thierschstrasse, Munich, in the
Empue of Germany, Manufacturer.
1, WILLIAM PHILLIPS THOMPSON FCS M.1 M E. of The Agency for
Foreign Patent Solicitors 6, Lord Street, Liverpool and 6, Bank Street,
Manchester both in the County of Lancaster 118, New Street, Birmingham in
the County of Warwick and 31 High Holborn in the County of Middlesex
Civil 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
-
In producing paints on a manufacturing scale the processes employed for mixing
the colours with oil and grinding the same, have each hitherto been performed
separately, either by means of two different machines or by the colours and oil
being mixed by hand by the workman, the product thus obtained being then
conveyed into a paint mill for the purpose of being ground
This invention allows of both the above mentioned processes being carried out
with one apparatus, which has the advantage of rendering unnecessary a second
machine on its being necessary for the workman to mix the paints by hand, as this
takes place in a much more thorough and even manner by means of the device
hereinafter described
In the accompanying drawings-
Figue 1 is a vertical section of this improved combined mixing and grinding
mill.
Figure 2 a plan view of the grinding hopper;
Figure 3 a vertical section of a modihed form of the apparatus driven from below
and turned by hand.
The apparatus consists of a colour or paint mill having a hopper « in the bottom
piece of which hopper is a grinding cone e rotating on a vertical spindle b.
d
e,
The spindle b is driven from a horizontal shaft by means of bevel gearing
this shaft revolving in either direction according as it is coupled to one or the
other of two pulleys go hot which one is duiven with a straight belt and the
other with a crossed belt.
Above the gruding cone c and in the neck of the actual hopper, a two-winged
beater or scoop of iron on the hike material, is atranged on the spindle, which
beater or scoop engages by means of two lugs & and I on the like in suitable grooves
in the hopper and is thus fixed Over this fixed beater or scoop are aanged
several other beaters on scoops m² m² m² m² m² spirally one above the other on the
spindle and attached to the latter by means of set screws or the like The beaters
or scoops mms may be made each with two pants of arms or wings as shown in
the drawing but are formed preferably howevei alternately with single and double
pairs of wings.
The aims of the successive beaters or scoops form such angles with one another

page_text: that large number of beaters (for instance five) are contained on the periphery
in one full turn of the shaft The arms of the beaters or scoops are bevelled off or
inclined and constructed of such form as to be adapted to mix the material in the
hopper when rotated in one dnection and to feed the mixed material downwards to
the grinding cone when rotated in the other direction. Thus the point o¹ of the
beater m' is bevelled off to the front and the part o³ of the same beater to the real
If colour and oil be introduced into the hopper with the object of being mixed,
a thorough stirring and mixing of the colour and oil takes place if the spindle b be
caused to rotate in an opposite direction to that necessary for feeding the material
downwards to the grinding cone c. If the other driving belt be then brought into
play the spindle b revolves in the opposite direction and the material is thus fed
downwards to the grinding cone c and 18 ground, the colour mixed with oil is
successively conveyed to the grinding cone by the scoops on paddles, and then passes
out from the bottom of the hopper a thoroughly ground.
The form of construction of the paint mill herein before described may be modified
to admit of the apparatus being driven from below and by hand, as shown in
Figure 3. It is obvious also that in an apparatus so modified, the driving may
take place by means of suitable geaning from a motor in the same way as above
described, and shown in Figure 1, by merely substituting suitable pulleys for the
handle.
Having now particularly described and ascertained the nature of the said
invention and in what mauuer the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is
-
An improved combined mixing and grinding mill for paints and the like,
consisting of the spiral arrangement of single or multiple nimed scoops or
beaters (m' m² m² m² m²) having bevelled or inclined surfaces and mounted on a
suitably driven vertical spindle (b) inside the gunding or mixing hopper (a), the
1otation of which spindle in one direction effects the mixing of the colour with the
oil, whilst its rotation in the opposite direction conveys the mixed oil and colour to
the grinding cone (c), a double armed scoop or beater (1) being fixed in the neck
of the hopper above the gunding cone substantially as herein before described and
shown on the accompanying drawings.
Dated this 3rd day of July 1895.
WM. P. THOMPSON & CO.,
Agents