IMPROVEMENTS IN STRAINERS USED IN PAPER MANUFACTURE
Year: 1880

page_text: LETTERS PATENT to Carl Kesseler, of 63, Mohrenstrasse, Berlin, W., in the
Empire of Germany, Civil Engineer and Patent Solicitor, for an Invention of
"IMPROVEMENTS IN STRAINERS USED IN PAPER MANUFACTURE."
cation from Leopold Zeyen, of Raguhn, in the German Empire.
A communi-
PROVISIONAL SPECIFICATION left by the said Carl Kesseler at the Office
of the Commissioners of Patents on the 29th January 1880.
"
CARL KESSELER, of 63, Mohrenstrasse, Berlin, W., in the Empire of Germany,
Civil Engineer and Patent Solicitor. IMPROVEMENTS IN STRAINERS USED IN
PAPER MANUFACTURE." (A communication from Leopold Zeyen, of Raguhn, in
the German Empire.)
The strainer appliances for retaining the "knots" contained in paper pulp have
hitherto been made of entire sheets of metal, and in consequence been subject to
various defects. One of these is that the proportion between the size and number
of the fine slits to the whole surface is constant, and if any part of it becomes
stopped up the whole strainer has to be handled for the purpose of cleaning. By
this present Invention a strainer appliance is produced not having this defect, and
being besides very considerably cheaper.
According to this Invention the strainer is made in two parts instead of one;
these parts consist of two plates, one of which has wide openings like a grate, on
which the other plate, the strainer, proper, rests. On the same grate plate or bed
plate may thus be placed any other required plate with finer or coarser slits, or
with few or many slits, in. By the facility for changing the upper plate or strainer
proper without changing the other a saving in the first cost of sets of such
appliances is effected, and the cost of the plates themselves is also reduced.
If these appliances become stopped up it is only necessary to remove and clean
the plates in question; the cleaning is also much easier than with plates cut out
of the solid.

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 29th July
1880.
CARL KESSELER, of 63, Mohrenstrasse, Berlin, W., in the Empire of Germany,
Civil Engineer and Patent Solicitor. "IMPROVEMENTS IN STRAINERS USED IN
PAPER MANUFACTURE." (A communication from Leopold Zeyen, of Raguhn, in
the German Empire.)
The strainer appliances for retaining the "knots" contained in paper pulp bave
hitherto been made of entire sheets of metal, and in consequence been subject to
various defects. One of these is that the proportion between the size and number
of the fine slits to the whole surface is constant, and if any part of it becomes
stopped up the whole strainer has to be handled for the purpose of cleaning. By
this present Invention a strainer appliance is produced not having this defect, and
being besides very considerably cheaper.
According to this Invention the strainer is made in two parts instead of one ;
these parts consist of two plates, one of which has wide openings like a grate, on
which the other plate, the strainer proper, rests.
On the same grate plate or bed plate may thus be placed any other required
plate with finer or coarser slits, or with few or many slits, in. By the facility for
changing the upper plate or strainer proper without changing the other a saving in
the first cost of sets of such appliances is effected, and the cost of the plates
themselves is also reduced.
If these appliances become stopped up it is only necessary to remove and clean
the plates in question; the cleaning is also much easier than with plates cut out
of the solid.
Figure 1 of the accompanying Drawings is a plan view of a strainer made
according to this Invention; Figure 2 is a vertical section of same, and Figure 3 a
vertical section at right angles to Fig. 2. a and b are two plates, the former
with large or wide openings through, and the latter with narrow openings or fine
slits through; the plate b is the strainer proper. By using strainer plates 6 with
different size appertures through any desired variation in the strainer action may
be obtained without changing the foundation plate a. Also in case of any strainer
plate b becoming stopped up it can be easily removed and cleaned without taking
the heavy foundation plate a up.
And having thus described and ascertained the nature of this Invention
communicated to me, I declare that I claim,-
The strainer made of two parts resting loosely one upon the other, one having
wide apertures, and the other fine apertures, substantially as and for the purposes
set forth.
In witness whereof, I, the said Carl Kesseler, have hereunto set my hand and
seal, this Twenty fourth day of July, in the year of our Lord One
thousand eight hundred and eighty.
CARL KESSELER. (L.S.)

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