Improved Method and Apparatus for Sifting, Bolting, Sorting, or Grading Meal, Middlings, and other like Pulverulent or Granular Materials or Produce.
Year: 1887

page_text: Improved Method and Apparatus for Sifting, Bolting, Sorting,
or Grading Meal, Middlings, and other like Pulverulent or
Granular Materials or Produce.
I CARL HAGGENMACHER of Buda Pest in the Kingdom of Hungary mill manager
do hereby declare the nature of the said 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 chiefly consists in arrangements of means for conveying or supplying
cleaning bodies or materials to sifting or bolting sieves mixing the said bodies or
materials with the stock or to be sifted or bolted and directing it over the bolting
sieves through the action of driving devices imparting to the sieves a peculiar
swinging or swaging motion that causes every single portion or point of the sieve
surfaces (as seen and projected in its course on a horizontal plane) to invariably
describe the same circular elliptic or nearly elliptic curve.
The invention further relates to a mode of keeping the meshes of the sieves clear
by the friction and vibration produced by the sliding and jumping action of the
aforesaid cleaning bodies or materials.
Figures 1 to 5 of the annexed drawing illustrates a complete apparatus showing
how my invention may be carried out in practice. Figure 1 is a sectional elevation
on the line 1-2 figure 3. Figure 2 is a cross section on the line 3-1 figure 3.
Figure 3 is a plan partly with the covers removed partly with the inner frames
removed and partly as a horizontal section through the fittings of the bolting sieves
and also of the sieve bottoms. Figures 4 and 5 show a suspended or hanging frame
with a shaft and driving pulley hereinafter referred to.
The apparatus is provided with a principal frame R swinging on suspension rods
adjustable as to their length and working on ball and socket joints at both ends and
with a driving shaft W carrying a driving pulley A and a disc K provided with a
crank pink figure 1 the shaft being supported by the hanging frame T.
On the principal frame R is fixed a cross piece S supporting a bearing L in which
the crank pin works. The disc K bearing the crank pink is provided with a
suitable counter-weight Q which serves to balance the weight of the sieve frame.
07

page_text: In the principal frame R is fixed a supporting frame t covered at its lower rim
with linen forming the sieve bottom l. In the supporting frame t and resting on
ledges c there are arranged one upon another two inner sieve frames a and a¹ above
which the covers d and d are arranged. The covers and the inner frames are pressed
down and fixed by the screws Z and Z.
Figures 1, 2 and 3 of the annexed drawing show the inner frames a and a¹ clothed
with the bolting sieves s and s'. The inner frames are composed of the surrounding
frame sides and of longitudinal and transverse slats or bars crossing each other at
right angles as in a grating. Openings are cut out in the longitudinal bars or
slats and in the cross bars are formed openings these openings allowing the stock
or produce to be bolted or sifted and the cleaning material mingled with it to travel
over the bolting sieve in the direction of the arrows >. The portions marked w of
the longitudinal and cross bars act as conveying bars their sole object being to
forward or propel the stock on the sieve. On the other hand the portions marked h
of the longitudinal and of the cross bars act as distributing bars effecting the distribu-
tion of the material under treatment that is to say regulating the height or thickness
of the layer of stock on the sieve.
Each of the inner frames a and a¹ contains a channel 9 and q¹ (figures 2 and 3)
for the purpose of returning or leading back the cleaning material being provided for
that purpose with propelling ledges or bars w². The cleaning material follows the
direction of the arrows >>> and leaving the channel at x is mixed again with
the material to be bolted and is thus caused to circulate continually through the
apparatus. The lower sides of the inner frames a and a¹ are covered with the
bolting sieves s and s¹.
The sieve bottoms l'are provided with bars similarly to the inner frames (bolting
sieve frames) a and a¹ in such a manner as to make a compact grating fixed in the
supporting frame t.
The cleaning material is supplied through pipes or shoots b and b¹ and can be
removed through the falling doors e and e¹ pressed on by springs and through a pipe
or trunk so as to enable the operator to change the cleaning material when
necessary.
When the apparatus is set to work and supplied through a trunk E with the
material to be bolted together with the cleaning material which is supplied in any
desired quantity through the trunks band b¹ figure 1 travel (over the sieve) in the
direction of the arrows along the cloth of the inner frames i.e., over the bolting
sieves. The stock or produce under treatment passes successively through the meshes
of the sieves falling through the upper sieve to the lower sieve and through the latter
on to the sieve bottom whereas the cleaning material being coarser remains on the
sieves and cleans the meshes of the latter by friction and vibration being continually
led back through its channel and kept in constant circulation.
The sieves of the channels q and q¹ are covered with cloth permitting even the last
and largest particles of the stock to be bolted to fall through the meshes.
The arrows ->> show the course of the bolted and sorted produce which is
delivered at G G¹ etc.
In conclusion it may be mentioned that the cleaning material might be supplied to
the produce to be bolted by any suitable arrangement of known means of conveyance.
For example the cleaning material may be conducted to an apparatus (elevator, worm.
conveyor endless band conveyor etc.) supplying the bolting apparatus the said
cleaning material would then reach the bolting apparatus together with the produce
to be bolted being subsequently eliminated and led back to the supplying apparatus
thus being kept in continual circulation.
In addition to a great variety of other substances or bodies in a natural or artificial
condition any suitably prepared articles can be used as cleaning materials such for
example as hollow iron balls wire rings or small spherical or annular brushes etc.
provided that they are capable of keeping the meshes of the sieves clear through
friction and vibration without causing the sieves to wear too rapidly.

page_text: Having now particularly described and ascertained the nature of this Invention
and in what manner the same is to be performed I declare that what I claim is :-
In sifting apparatus provided with sieves arranged and operated as hereinbefore set
forth the employment of passages or channels arranged on the sifting or bolting sieve
and provided with propelling or conveying bars and distributing bars or slats the said
passages or channels being so combined as to enable cleaning materials mingled with
the produce to be sifted for the purpose of clearing the meshes or intersticos of the
sieve and separated from the said produce during the sifting process to be returned to
the produce entering the sifting apparatus substantially as hereinbefore described with
reference to the accompanying drawings.