AN IMPROVEMENT IN MIDDLINGS. PURIFIERS
Year: 1885

page_text: I, HENRY SIMON of 20 Mount Street Manchester in the County of Lancaster,
Engineer do hereby declare the nature of my invention for "AN IMPROVEMENT IN
MIDDLINGS. PURIFIERS " to be as follows:-
In machines of the kind described in the Specification N° 5155 of 19th March
1884, there is an endless filter cloth, the inside of which is exhausted by fan action
or similar means and consequently some of the fine flour or dust contained in the
material operated on is deposited on the outside of this cloth.
It has been attempted to cut off one part of the inside of this travelling filter
cloth by partitions most conveniently situated at one end where the filter cloth
passes over rolls, air under slight pressure being introduced at this part to drive
out from the inside the dust sucked against the cloth. In practice this fails
because there can be no outlet for the air under pressure with the dust, except to
a stive room which is dangerous and objectionable.
This invention relates to means of avoiding this difficulty in the following
manner. Instead of blowing air into the part cut off from the inside of the filter,
this portion of the inside of the filter is connected with the fan provided in such
machines, or with another fan or blower in such a way that the external air is
drawn through this cut off part but cannot enter the inside of the travelling filter
except having first passed out through a portion of this travelling filter, having
cleaned it with or without the aid of beaters which may be such as are described
in the specification above referred to.
Thus the air that has passed out through the filter does not escape into the mill
but is drawn again by the fan into the other inside portion of the travelling filter
carrying with it that part of the dust cleaned from the filter by the air issuing
through it and by the beater, which may not have fallen into the channel or worm
provided for carrying it away. This minor part of the dust will thus be deposited
on the outside of the filter again.
Regulating valves and partitions are provided to regulate the strength of the
suction. There may be two or more of the cut off spaces or only one.
Instead of sucking the air as described air may be blown into a cut off part of
the interior of the travelling filter cloth and then allowed to escape after depositing
part of the dust on the filtering cloth by passing again through it into another cut
off space of the inside filtering cloth before finally escaping.
Dand this 10th day of T... 100%
ABEL & IMRAY,
Agents for the Applicant.

page_text: An Improvement in Middlings Puriflers.
I, HENRY SIMON, of 20 Mount Street, Manchester in the County of Lancaster,
Engineer, do hereby declare the nature of this invention and in what manner the
Bame is to be performed to be particularly described and ascertained in and by the
following statement :―
In machines of the kind described in the Specification No 5155 of 19th March
1884, there is an endless filter cloth, the inside of which is exhausted by fan action
or similar means and consequently some of the fine flour or dust contained in the
material operated on is deposited on the outside of this cloth.
It has been attempted to cut off one part of the inside of this travelling filter
cloth by partitions most conveniently situated at one end where the filter cloth
passes over rolls, air under slight pressure being continuously introduced at this
part to drive out from the inside the dust sucked against the cloth. In practice
this fails because there can be no outlet for the air under pressure with the dust,
except to a stive room which is dangerous and objectionable.
This invention relates to means of avoiding this difficulty in the following
manner. Instead of blowing air into the part cut off from the inside of the filter,
this portion of the inside of the filter is connected with the fan provided in such
machines, or with another fan or blower in such a way that the external air is
drawn through this cut off part but cannot enter the inside of the travelling filter
except having first passed out through a portion of this travelling filter, having
cleaned it with or without the aid of beaters, which may be such as are described
in the specification above referred to, or in any other way.
Thus the air that has passed out through the filter does not escape into the mill
but is drawn again by the fan into the other inside portion of the travelling filter"
carrying with it that part of the dust cleaned from the filter by the air issuing
through it and by the beaters, which may not have fallen into the channel or worm
provided for carrying it away. This minor part of the dust will thus be deposited
on the outside of the filter again.
Regulating valves and partitions are provided to regulate the strength of the
suction. There may be two or more of the cut off spaces or only one and the air
may be introduced, and the filter cleaned at both ends or in as many places as may
be desirable or convenient.
Instead of sucking the air as described, air may be blown into a cut off part of
the interior of the travelling filter cloth and then allowed to escape after depositing
part of the dust on the filtering cloth by passing again through it into another cut
space of the inside filtering cloth before finally escaping into the mill.
off
Fig. 1 shews a longitudinal section and Fig. 2 shews a cross section of a
middlings purifier having one arrangement of my invention applied thereto.
Fig. 3 shews an enlarged part section of the same.
a is the travelling filter cloth, which at one end is made to pass over two guide
rollers b b and over a partition c against which it is pressed by a roller d, so that
within this part of the filter cloth there are formed two separate compartiments e
and e. The compartment e has ports ƒ that communicates by means of a passage y

page_text: with the suction of the exhaust fan h of the purifier, and the compartment e' has
ports f¹ communicating with the outer air. Thus as the air is drawn by the fan h
from the compartment e, external air is caused to enter the compartment e¹ through
the ports f¹ and is drawn thence through the filter cloth in the space i, whence it.
passes back in the contrary direction through the filter cloth into the compart
ment e on its way to the fan. By this means the air in passing from e into i, will
detach from the filter cloth the deposit of dust on the outer side thereof, which
dust will mostly fall down and be conveyed away by the worm k, while that
portion which is retained in the air current will be deposited on the cloth again as
the air passes through it into e, on its way to the fan.
Fig. 4 shews another arrangement in which the space outside the filter cloth a is
divided by a partition into two compartments i and , the purified air from the
machine delivered by the fan being caused to pass through the ports m into the
compartment, whence it passes through the filter cloth into the space e and thence
back again through the cloth into the compartment i¹ in order to escape through
ports m¹ to the outside of the machine. Thus on passing from the space e to the
compartment i, the air in traversing the filter cloth will detach the accumulated
dust therefrom, which will fall into the worm k.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. In middlings purifiers, causing external air to pass from the inside to the
outside of a cut-off portion of the filter cloth so as to detach the accumulated dust
therefrom, such air being then caused to pass back in the contrary direction
through another cut off portion of the filter cloth on its way to an exhaust fan or
to the atmosphere substantially as herein described.
2. In middlings purifiers, causing the air delivered from the purifier fan to pass
from a chamber through a cut-off portion of the filter cloth in the direction from
the outside to the inside, in order to pass back in the direction from the inside to
the outside of the cloth into a second chamber, so as to detach the accumulated
dust from the cloth, the air being made to pass from such chamber to the outside
of the machine, substantially as herein described.
3. The combination of the arrangement for detaching dust from the filter cloth
of a purifying machine by means of air currents referred to in the preceding claims,
with any known arrangement of beater apparatus for imparting blows or vibrations
to the filter cloth while it is subject to the action of the air currents, for the
purpose of facilitating the separation of the dust, substantially as herein described.
Dated this 13th day of March 1886
ABEL & IMRAY,
Agents for the Applicant