An Improved Machine for Straining Pulp and the like.
Year: 1893

page_text: Date of Application, 12th June, 1893
Complete Specification Left, 9th Apr., 1894-Accepted, 12th May, 1894
PROVISIONAL SPECIFICATION.
An Improved Machine for Straining Pulp and the like.
I PAUL REINICKE of Cöthen in the Empire of Germany, Manufacturer do
hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide a pulp strainer of large operative
capacity within a space of small dimensions and with great simplicity of the
mechanism. The principal parts of this improved pulp-strainer are combined in
the following manner.
The straining screens having collectively a large surface are made as plain rings
and mounted in pairs parallel to each other. Between the two screens of each pair
is a reciprocating presser in the shape of a rotary disk centred upon an arbor, the
latter passing through the centres of the different screen-rings.
The screens of each pair are connected at their outer rims by walls, while a
screen of each pair is also connected to the adjacent screen of the next pair by
walls at the inner rims of the screens.
These walls and screens divide the inner space of the pulp strainer into two main
compartments one interior and the other exterior of the screens. Into the one of
these compartments namely that within which the presser disks are, passages lead
for entrance of unstrained pulp, lime milk, Kaolin paste or whatever the material
may be for which the strainer is to be used.
The other compartment, lying on the other side of the screens receives the
strained pulp which passes over an overflow out of the pulp strainer.
The arbor on which the presser disks are mounted carries outside the machine
a cross throw cam drum into the peripheral curve of which a fixed dog engages.
When the arbor is revolved, the fixed dog acting on the cam gives the arbor a
to and fro end wise movement in direction of its axis. The rotating disks thus
move alternately towards the one and other of the pair of screens between which
they are mounted and as they rotate at the same time they keep the pulp in
continual flow and prevent the lumps from choking the screening surfaces.
The space for the unscreened pulp within which the lumps get more and more
numerous terminates below in a channel with a valve where the lumpy refuse is
from time to time removed.
The pulp strainer can also be arranged so as to operate inversely. In this case
the disks would reciprocate within the screened pulp, to act by suction.
Instead of arranging the arbor so as to move axially to and fro for the purpose
of reciprocating the disks, an equivalent movement may also be produced by
obliquely fixing the disks or by corrugating the same radially in broad wave-like
corrugations.
Dated this 12th day of June 1893.
.K. HADDAN,
Agent for Applicant.

page_text: An Improved Machine for Straining Pulp and the like.
I PAUL REINICKE, of Cöthen in the Empire of Germany, Manufacturer 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:-
The object of this invention is to provide a pulp strainer of large operative
capacity within a space of small dimensions and with great simplicity of mechanism.
The principal parts of this improved pulp strainer are combined in the following
manner.
Reference being made to the annexed drawings in which
Fig. is a longitudinal section and Fig. 2 a cross section of the improved
machine, and
Fig. 3 a detail view showing an alternative construction.
The straining screens b, having collectively a large surface, are made as plane
rings, or in other words are flat annular plates, and are mounted in pairs parallel to
each other.
Between the two screens of each pair is a reciprocating presser in the shape of a
rotary disk a centred upon an arbor n, the latter passing through the centres of the
different screen-rings.
The screens of each pair are connected at their outer rims by walls C, while a
screen of each pair is also connected to the adjacent screen of the next pair by
walls c at the inner rims of the screens. The walls c rest upon a pediment e which
forms the bed-plate of the apparatus.
These walls and screens divide the inner space of the pulp strainer into two main
compartments, the one interior, the other exterior of the screens. Into the one of
these compartments, namely that within which are the presser disks passages o lead
for entrance of unstrained pulp, lime-milk, Kaolin paste, or whatever the material
may be for which the strainer is to be used. The other compartment, lying on the
other side of the screens, receives the strained pulp which passes over an overflow p
out of the pulp strainer.
The arbor n on which the presser disks are mounted carries outside the
machine a cross-throw cam g into the peripheral curve of which a fixed dog i
engages.
When the arbor n is revolved by pulley k, the fixed dog i acting on the cam g
gives the arbor a to and fro end wise movement in direction of its axis. The
rotating disks a thus move alternately towards the one and other of the pairs of
screens between which they are mounted, and as they rotate at the same time,
they keep the pulp in continual flow and prevent the lumps from choking the
screens.
The space for the screened pulp, within which the lumps get more and more
numerous, terminates below in a channel f provided with a valve whereby the
lumpy refuse may be from time to time removed.
The pulp strainer can also be arranged so as to operate inversely. In this case
the disks would reciprocate within the screened pulp to act by suction, so that the
screened pulp drawn into the spaces in which the disks a move might be delivered
through the channel for over an appropriate overflow in a steady stream.
overflow and the entrance hopper o would then be dispensed with and the
unscreened pulp would be fed direct into the surrounding space within
the walls l.
The
Instead of arranging the arbor so as to move axially to and fro for the purpose
of reciprocating the disks, an equivalent movement may also be produced by

page_text: obliquely fixing the disks a, as in Fig. 3 or by corrugating the same radially in
broad wave like corrugations upon the arbor n.
The lateral rocking of the disks in their revolution will give on each revolution
one side thrust in each direction.
By forming said disks of two semi-circles placed opposite each other in an
inclined position on the axle, to alternate lateral motions to each side can be
obtained, in each revolution. By suitably modifying the form or position of the
vessels, the axle may also be made to rotate vertically or obliquely instead of
running horizontally as shown in the drawing.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
1. An improved machine for straining pulp and the like, having fixed on a
rotary shaft n a number of disks a adapted to reciprocate within spaces on
both sides of which annular screens b are arranged, said shaft being caused to
produce abrupt reciprocating motion in an axial direction for the purpose set
forth.
2. In a strainer having a rotary shaft, disks thereon and screens as set forth,
the manufacture of said strainer with the disks inclined upon the shaft, or
corrugated to give one or more reciprocating lateral impulses when revolved, for
the purpose set forth.
R. HADDAN,
Of the Firm of Herbert Haddan & Co.,
18, Buckingham Street, Strand, London, W.C., Agent to Applicant.