Year: 1886

page_text: We JOSEPH PETRIE FIELDEN and THOMAS NIELD ROBINSON of Railway Works
Rochdale in the County of Lancaster, Engineers, do hereby declare the nature of
this invention to be as follows:-
In the manufacture of meal and flour by means of rollers a considerable amount
of heat is generated and communicated to the air which passes through the
apparatus with the said meal and flour. The said air so heated absorbs moisture
from the meal and flour and unless removed passes therewith from the roller mills
with the said meal and flour through the shoots and elevators to the reels or
dressing apparatus and causes the said meal and flour to sweat, thereby reducing
its value and interfering with the proper working of the said reels or dressing
apparatus.
Hitherto apparatus or appliances designed for removing the said hot air from
the meal and flour have not done so effectively nor with economy. One great
objection being that together with the large body of air removed the apparatus or
appliances used permitted an excessive quantity of fine flour or stive to be carried
away. The said fine flour or stive had to be separated from the air in dust
collectors or by equivalent means, and on account of the great volume of air and
the large quantity of such fine flour or stive the dust collectors had to be
undesirably large or inconveniently numerous, notwithstanding which they did not
act efficiently.
Now the object of our invention is to provide apparatus or appliances by which
the heated air shall be effectively removed, with little or scarcely any fine flour or
ative carried along with it.
Our invention consists First. In combining with a suction pipe opening upwards
within the roller mill a hood and deflectors so arranged as to allow of the air being
withdrawn whilst the fine flour or stive is prevented to a very large extent from
passing away from the mill with the heated air.
Second. In constructing elevators for carrying away the meal or flour from
roller mills with an air outlet at the head of the uptake to allow any heated air,

page_text: carried with the said flour from the mill, to escape into the atmosphere. The
outlet is connected to a pipe or provided with means for preventing meal or flour
escaping with the air.
A convenient construction under the first part, when a mill having two pairs of
horizontal rollers in one plane is used, is to have a pipe opening upwards longi-
tudinally between the pair of rollers, a vee shaped deflector with the apex upwards
above the said pipe, and a collecting box with movable bottom and adjustable
deflectors beneath the said pipe. The hood may have adjustable or fixed deflectors
if required.
Under the second part the elevator or elevators for conveying away the meal or
flour from the roller mills is or are made advantageously with a pipe or pipes
opening to the top of the said elevators on the uptake side, the said pipe or pipes
being bent over at the end or having a cap, baffle plate or equivalent devices.
It will be obvious that the first and second parts of our invention can be used in
combination or separately.

page_text: and Moisture from Meal and Flour in Roller Mills and
Elevators.
We JOSEPH PETRIE FIELDEN and THOMAS NIELD ROBINSON of Railway Works,
Rochdale, in the county of Lancaster, Engineers, 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 the manufacture of meal and flour by means of rollers a considerable amount
of heat is generated and communicated to the air which passes through the
apparatus with the said meal and flour. The said air so heated, absorbs moisture
from the meal and flour and unless removed passes therewith from the roller mills
with the said meal and flour through the shoots and elevators to the reels or
dressing apparatus and causes the said meal and flour to sweat thereby reducing
its value, and interfering with the proper working of the said reels or dressing
apparatus
Hitherto apparatus or appliances designed for removing the said hot air from
the meal and flour have not done so effectively nor with economy. One great
objection being that together with the large body of air removed, the apparatus or
appliances used, permitted an excessive quantity of fine flour or stive to be carried
away. The said fine flour or stive had to be separated from the air in dust:
collectors or by equivalent means and on account of the great volume of air and
the large quantity of such fine flour or stive the dust collectors had to be
undesirably large or inconveniently numerous notwithstanding which they did not
act efficiently..
Now the objects of our invention are to remove the heated air from the meal or
flour in such manner as to carry off little or scarcely any fine flour or stive, and to
provide apparatus or appliances by which the said heated air shall be effectively
removed in the desired manner.
Our invention consists. First. In combining with a suction pipe opening upwards
within the roller mill a hood and deflectors so arranged as to allow of the air being
withdrawn whilst the fine flour or stive is prevented to a very large extent from
passing away from the mill with the heated air.
Second. In constructing, elevators for carrying away the meal or flour from
roller mills with an air outlet at the head of the uptake to allow any heated air
carried with the said flour from the mill, to escape into the atmosphere. The
outlet is connected to a pipe or provided with means for preventing meal or flour
escaping with the air.
A convenient construction under the first part, when a mill having two pairs of
horizontal rollers in one plane is used, is to have a pipe opening upwards longi-
tudinally between the pair of rollers, a vee shaped deflector with the apex upwards
above the said pipe, and a collecting box with movable bottom and adjustable
deflectors beneath the said pipe. The hood may have adjustable or fixed deflectors
if required.

page_text: bent over at the end, or having a cap, baffle plate, or equivalent device."
It will be obvious that the first and second parts of our invention can be used
in combination or separately.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a vertical section of a roller mill fitted with our improved apparatus for
removing heated air in the novel manner hereinbefore specified. a casing of mill.
bb pairs of horizontal rollers. c pipe opening upwards longitudinally between
the pairs of rollers. d hood extending from side to side of the casing a.
e collecting box. f movable bottom. 9 deflectors attached to s by means of slots
or guides and screws so as to be adjustable. h deflectors within the hood, these
may also he adjustable and the number may be varied. The mouth of the pipe c
extends about the full length of the rollers 6 b¹ and may have a single or divided
opening or branches.. The end of the pipe c outside the mill is led to a fan or
exhauster by means of which heated air is drawn from the mill whilst the fine
dust and stive is caused by the hood and deflectors to fall into the collecting
box e from which it is allowed to fall from time to time by opening the door f.
The position of the pipe c and hood will be varied according to the number of
rollers used. In a three roller mill it would be beneath the middle roller.
Fig. 2 is a section of an elevator for use in raising the meal or flour delivered
from roller mills: here the said elevator is fitted with a pipe i opening into the
top of the elevator on the uptake side j. The said pipe is fitted with a cap or
baffle plate k.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that
what we claim is :-
First. Removing hot air and moisture with the admixture of little or scarcely
any fine flour or stive from roller milling apparatus substantially as set forth.
Second. The combination with roller mills of suction pipes, hoods, deflectors, and
collecting boxes substantially in the manner and for the purpose set forth.
Third. The combination with elevators used in connection with roller mills of
air outlets and baffle plates or equivalent arrangement disposed substantially in
the manner and for the purpose set forth.
Fourth. The combination of roller mills and elevators provided with air outlets
and accessories substantially in the manner and for the purpose set forth.
Dated this second day of November 1886.