Improvements in Construction ΟΙ Strainer Plates Used 1Or Straining Pulp in the Manufacture of Paper or other Industries.
Year: 1888

page_text: Date of Application, 14th Feb., 1888
Complete Specification Left, 1st Nov., 1888
Complete Specification Accepted, 7th Dec., 188
the
Improvements in
Construction ΟΙ Strainer Plates Used 1Or
Straining Pulp in the Manufacture of Paper or other Industries.
I, JOHN SCOTT of Denny in the County of Stirling, North Britain, Engineer and
Millwright, do hereby declare the nature of my invention for "IMPROVEMENTS IN THE
CONSTRUCTION OF STRAINER PLATES USED FOR STRAINING PULP IN THE MANUFACTURE
OF PAPER OR OTHER INDUSTRIES to be as follows:-
.
This invention relates to Improvements in the construction of Strainer Plates used
for straining pulp in the manufacture of paper or other industries, and has for its
object to facilitate the repairing, removal or renewal of any portion or section of the
plate, when from wear the strainer plate slits become irregular or too wide from their
original cut.
In carrying out the object of this Invention a frame preferably of brass is provided,
the said frame consisting of a longitudinal bar at cach side, held together by a
number of transverse bars, set at equal distances apart, between which transverse bars,
the beforementioned portions or sections of the strainer plate are inserted. The upper
or face surface of the transverse bars is made to project above the upper surface of
the longitudinal bars, by a distance equal to the depth of the removeable strainer
plates, so that when these removeable plates are inserted into the frame, the whole
upper or face surface of the plate is level. To allow the portions or sections of the
strainer plates to slide easily into, and at the same time hold them securely in position
a shelf is provided on each side of the transverse bars along their entire length,
preferably by planing a portion out of each side of the said bars, the cast section of
the bars being constructed on either of two principles one a truncated triangle with
its base uppermost, and when finished resembles two truncated triangles, one above
the other with bases uppermost, the other a groove cut in section of the bars, with
tongue formed on each edge of removable plate. By this arrangement the plates are
dove-tailed or tongued to fit groove in the transverse bars, and can only be slid into
or out of the frame at the ends thereof. The last portion or section of the
plate at each end of every compartment in the frame is then secured to the
longitudinal bars by screwed pins or other equivalent means, the whole forming as
it were one solid plate.
D. DRYSDALE AUSTIN,
101, St. Vincent Street, Glasgow,
Petitioner's Agent.

page_text: Improvements in the Construction of Strainer Plates Used for
Straining Pulp in the Manufacture of Paper or other Industries.
I, JOHN SCOTT of Denny in the County of Stirling, North Britain, Engineer and
Millwright 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 :-
This Invention relates to Improvements in the construction of Strainer Plates used
for straining pulp in the manufacture of paper or other industries, and has for its
object to facilitate the repairing, removal or renewal of any portion or section of the
Plate, when from wear the strainer plate slits become irregular or too wide from their
original cut.
In carrying out the object of this Invention a frame preferably of brass is provided,
the said frame consisting of a longitudinal bar at each side held together by a number
of transverse bars, set at equal distances apart, between which transverse bars, the
before mentioned portions or sections of the strainer plate are inserted. The upper
or face surface of the transverse bars is made to project above the upper surface of
the longitudinal bars, by a distance equal to the depth of the removable strainer plates
or slips, so that when these removable plates or slips are inserted into the frame at
either end thereof the whole upper or face surface of the plate is level. To allow
these removable siips to slide easily into, and at the same time hold them securely in
position, a shelf or its equivalent is provided on each side of the transverse bars along
their entire length, preferably by planing a portion out of each side of the said bars.
The last portion or section of the plate at each end of every compartment in the frame
is then secured to the longitudinal bars by screwed pins or other equivalent means, the
whole forming as it were one solid plate.
In order that my said Invention may be most fully understood and readily carried
into effect I will proceed to describe the drawings hereunto annexed.
Fig. 1. is a front view of a strainer plate constructed according to this Invention.
Fig. 2. is a longitudinal section of the same taken at the line A. B. Figure 1.
Figures 3. and 4 are longitudinal sections of a small portion of the plate, shewing
two different methods of inserting the removable slips between the transverse bars of
the frame.
The improved strainer plate illustrated in the said figures, consists of a series of
removable strainer slips C, which are arranged to slide in between the equidistant
transverse bars D) of a brass or other metal frame, and secured to the longitudinal
bars or sides E of the same by screw pins F or other equivalent means. The upper or
faced surface of the transverse bars D'is made to project above the upper surface of the
longitudinal bars E, by a distance equal to the depth of the removable strainer slips C, so
that when these said slips C are inserted into the frame, the whole upper or face surface
of the plate is level. To allow the slips to slide easily into, and be held securely in

page_text: position a shelf or its equivalent is provided on each side of the transverse bars D,
along their entire length, preferably by planing a portion out of each side of the
same. The cast section of these transverse bars D is a truncated triangle with its
base uppermost but when planed or finished, the upper portion of the same may take
the form of a dove-tail as shown at Fig. 4, or it may be tee-shaped as represented at
Fig. 3, the slips C being bevelled to fit the dove-tail in the former case, and tongued
to fit the groove in the latter. It will thus be easily seen that the slips C, which are
by preference made from rolled brass plates are so secured to the frame that they can
be removed with facility, and others substituted without in any way injuring the
frame, riveting and soldering being entirely avoided. Worn slips can be taken out,
reclosed and cut to any gauge without altering the frame from its original form.
"Stringing" is to a great extent avoided, there being a free discharge of pulp through
the removable slips C.
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:-
First. The general arrangement and combination of parts constituting the
improved strainer plate, substantially as herein before set forth with reference to the
annexed drawings.
Second. The removable strainer slips C, between the transverse bars D,
substantially as and for the purposes hereinbefore set forth with reference to the
annexed drawings.
Dated this 15th day of October 1888
D. DRYSDALE AUSTIN,
Applicant's Agent.

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