A NEW OR IMPROVED PULP STRAINER FOR PAPER MACHINES
Year: 1880

page_text: LETTERS PATENT to Carl Kesseler, of 63, Mobrenstrasse, Berlin, W., in the
Empire of Germany, Civil Engineer and Patent Solicitor, for an Invention of
"A NEW OR IMPROVED PULP STRAINER FOR PAPER MACHINES." A com-
munication from Leopold Zeyen, of Raguhn, in the Dukedom of Anhalt,
German Empire.
PROVISIONAL SPECIFICATION left by the said Carl Kesseler at the Office
of the Commissioners of Patents on the 15th November 1880.
CARL KESSELER, of 63, Mohrenstrasse, Berlin, W., in the Empiro of Germany,
Civil Engineer and Patent Solicitor. "A NEW OR IMPROVED PULP STRAINER
FOR PAPER MACHINES." A communication from Leopold Zeyen, of Raguhn, in
the Dukedom of Anhalt, German Empire.
My improved pulp strainer differs from those hitherto known principally in that
instead of the simple, or as lately proposed double plates capable of lateral motion
over one another, rods are used, which are mounted in a rectangular frame
movable in itself, thus forming a trellis or latice frame; the spaces between these
rods can be made wider or narrower by said movement of the frame whilst the
machino is in motion.
The chief features of the strainer are as follows:-
The frame which is rectangular in its normal position is hung in bearings upon
arms projecting from it, and is jointed at the corners. At one end a second arm is
fixed to the side, and projects at a short distance from the frame over the end, and
at right angles to the side to which it is attached; the end of this arm is forked,
and contains. a swivel nut, in which works a long screw attached by a suitable
adaptable joint to the end of the frame, and carrying a hand wheel or handle upon
its outer end. By screwing this in, the end of the frame is forced back, carrying
one side, and the other end of the frame with it, and converting the previously
rectangular frame into a rhomboidal form, and lessening the distance between the
rods. This can be effected whilst the machine is in motion, and by setting the

page_text: frame to its rectangular shape, and consequently increasing the distance between
the rods, any knots or obstructions can be readily floated out, thus providing a
convenient means of cleaning.
Equidistant pivot holes are provided in both sides of the frame in which the
ends of the rods already mentioned are placed, and secured from falling out by
suitable laths or strips.
Arms are fixed to the movable side or ends of the frame, carrying suitable plates
for the beater wheels of the reciprocating mechanism to strike against. These
plates are made of sufficient size to allow for the lateral movement of the frame,
and thus obviate the necessity of shifting the beater wheels upon their shafts.
The beater wheels impart to the pulp strainer the necessary reciprocating movement
by which it swings upon the first mentioned arms.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Carl Kesseler in the Great Seal Patent Office on the 11th May
1881.
CARI KESSELER, of 63, Mohrenstrasse, Berlin, W., in the Empire of Germany,
Civil Engineer and. Patent Solicitor. "A NEW OR IMPROVED PULP STRAINER
FOR PAPER-MACHINES." A communication from Leopold Zeyen, of Raguhn, in
the Dukedom of Anhalt, German Empire.
The pulp strainer represented in the annexed Drawing differs from those hitherto
known, principally in that instead of the simple, or as lately proposed double
plates capable of lateral motion over one another, rods are used which are mounted
in a square frame movable in itself, and which can be set wider or narrower by
the displacement of the frame whilst the machine is in motion.
Figure 1 is a plan of the pulp strainer; Figure 2, an elevation; Figure 3, a
longitudinal section; Figure 4 is a sido view, and Figure 5, a transverse section of
the-same.
The rear longitudinal part of the frame A (Figure 1) is provided with pivots a, a,
which are free to rotate in bearings, so that the frame and the parts connected
therewith can swing around the axis thereof. This longitudinal part A can only
swing up and down, and is incapable of any other movement. With one end
thereof, that which is nearest to the operator, an angle lever or knee piece a¹ is
firmly connected, which is bent forward round the right handside part b.
This knee piece terminates in front in a fork m', in which the screw nut m of
the screw spindle d is capable of rotating in a horizontal plane round pivots. The
purpose thereof will be hereinafter more fully set forth.
The bead pieces b, b, are jointed by corner bolts e, e¹, ell, ell, to the front B of
the frame on the one hand, and the back A of the frame on the other hand, so as to
allow of the framing being displaced in itself, that is to say, that its configuration
be altered from a rectangular to a rhomboid, as is indicated by dotted lines in
Figure 1.
To the longitudinal parts of the frame A and B, boards N (Figures 3 and 5) are
fixed, which on their upper edge are provided with equidistant pivot holes, into
which the pivots of the rods 8, Figure 5, fit, so that the frame forms a kind of
railing or trellis, Figure 1. To maintain the rods in the pivot holes two strips or
laths 7,, are fixed above the rods on the longitudinal frame-parts. If now the
frame is made to move sidewise, the rods placed thereon will also move, and the
distances between them will decrease in proportion as the rods become oblique in
consequence of the movement. The facility with which the alteration of the
apertures can be effected by simply changing the lateral displacement of the frame
allows to effect such alteration even when the machine is working. If the framing
is so set as to be rectangular, the distances between the rods or the apertures are
largest, and the cleansing of the apertures may be effected with the greatest
facility by simply setting the frame to be rectangular; the apertures release any
knots that may be caught between them, and these knots are immediately floated
It is con-
out.
.For such displacement of the frame the screw-spindle d will serve.
nected with the right hand side end b of the framing by a hinged piece in which said
screw is free to rotate, but can not be longitudinally moved. And this hinged
picce takes by an eye upon a pivot c, which is vertically connected with the side
port.
Round this pivot the hinged piece is free to move, and can take a position
oblique to that of the side, and this, as will be seen at a glance in the Figure, is
necessary for the intended displacement.

page_text: be moved to the right or left upon the corner pivots ell, el, of the rear part A by
means of the aforesaid spindle d, and thereby an enlargement or diminution of the
apertures formed by the rods 8 can be caused (compare with the dotted lines in ♬
Figure 1).
The beater wheels of the reciprocating mechanism strike against the plates b', b',
connected with the front B of the frame by arms; the size of such plates can be in
each case suited to the desired displacement, so as to obvinte the necessity for
shifting the beater wheels upon their shafts. These beater wheels impart to the 1
pulp strainer the required reciprocating movement by which it swings up and
down on the pivots a, a, of the frameback A.
CLAIMS.
First. A pulp strainer for paper machines, consisting of single rods 8 which have
bearings in boards 7 of a frame, the rectangular form of which can be altered into 1
a rhomboid form for the purpose of changing at will within certain limits the
width of the apertures of the pulp strainer, substantially as set forth and shown.
Second. In a regulating pulp strainer, the kneepiece a¹, with the nut m, the
screw spindle d, and the connecting piece e, in combination with the frame A, B,
b, b, for effecting the required displacement.
Third. In such pulp strainers, the arrangement of the plates 61, 61, upon which
the beater wheels act, so as always to keep the plates over the beater wheels, which
are not capable of lateral movement when the longitudinal part B to which said
plates are attached is displaced.
2
Fourth. The combination of parts as set forth in claims 1 to 3, so as to form a 2
pulp strainer which is capable of being set during the working, substantially as and
for the purposes set forth and shown in the accompanying Drawings.
In witness whereof, I, the said Carl Kesseler, have hereunto set my hand
and seal, this Sixth day of May, in the year of our Lord One thousand eight
hundred and eighty one.
CARL KESSELER
(L.S.)