Improvements in Strainers for Paper-making Machinery.
Year: 1894

page_text: Date of Application, 24th Mar., 1894.
Complete Specification Left, 18th Dec., 1894-Accepted, 19th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in Strainers for Paper-making Machinery.
-
I, LEOPOLD ZEYEN, of Raguhn, Anhalt, in the Empire of Germany,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
My invention relates to strainers for paper-making machinery.
In the strainers hitherto in use in the manufacture of paper, whether they be
round, as in rotary apparatus, or flat, as in apparatus of the horizontal type, the
width of the slits or apertures almost without exception cannot be varied and as
occasions may arise on which it is desirable to employ a slit of greater or less width
for paper which is already in course of manufacture this is obviously a great
disadvantage, besides which the necessity of using sharp or pointed instruments to
clean the slits caused the latter to become injured and widened.,
Nor are these the only grounds of objection; for in factories in which various
qualities of paper are made the manufacturer is compelled to keep a stock of
expensive spare parts consisting of strainers with slits of various degrees of
coarseness.
According to my invention I provide for altering the width of the slits by
employing rows of transverse bars arranged at regular distances from each other
and means for simultaneously shifting each two rows of the said bars without
interruption of the work by attaching them to longitudinal bars actuated by means
of a carrier or of a double lever operated by a screw, a pointer indicating upon a
scale when the desired width of slit or distance between the bars has been
attained.
1
1001
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant..
I, LEOPOLD ZEYEN, of Raguhn, Anhalt, 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:-
My invention relates to strainers for paper-making machinery.
In the strainers hitherto in use in the manufacture of paper, whether they be
round, as in rotary apparatus, or flat, as in apparatus of the horizontal type, the
width of the slits or apertures almost without exception cannot be varied and as
occasions may arise on which it is desirable to employ a slit of greater or less
width for paper which is already in course of manufacture this is obviously a great
disadvantage, besides which the necessity of using sharp or pointed instruments to
clean the slits caused the latter to become injured and widened.
Nor are these the only grounds of objection; for in factories in which various
qualities of paper are made the manufacturer is compelled to keep a stock of

page_text: expensive spare parts consisting of strainers with slits of various degrees of
coarseness.
My improved strainer, which allows the width of the slit to be varied by means
of bars placed at regular intervals side by side and parallel to each other, is
characterized by the fact that it is possible to effect a simultaneous shifting of
every two rows of bars whilst work is in progress.
By this means the disadvantages of the arrangement previously referred to are
avoided; the slits may be set to their greatest width in a short time without the
use of any sharp or pointed instrument and may be completely cleansed by simply
squirting them with water.
In the accompanying drawing,—
Figure 1 shews by way of example an end elevation of a rotary dodecahedral
strainer; and,
Figure 2 is a longitudinal section of the same.
Figure 3 is a similar view of part of the strainer on a larger scale :
Figures 4 and 5 are a transverse section and a sectional plan respectively of part
of the strainer also drawn to an enlarged scale shewing the adjusting mechanism
and the arrangement of the bars in the two rows.
Figure 6 is a cross section also drawn to an enlarged scale shewing the
arrangement of the bars in a strainer of the horizontal type; and,
Figures 7 and 8 are respectively a longitudinal section and a plan drawn to a
smaller scale of a strainer of the same type, constructed according to my
invention.
In place of the slotted plates which have hitherto been almost exclusively used,
I employ metallic bars e of a form suited to the purpose for which they are to be
used, lying parallel to each other and side by side, the interspaces between which
form the slits, and these latter can be adjusted to a greater or less width when
work is proceeding by simultaneous shifting of the two rows of bars, which latter
rotate upon pins at their ends.
The twelve longitudinal bars a', a², a³ and so on, are rigidly connected with the
terminal plates 6 and 62, Figure 2, of the strainer, these plates with the bars
forming the rigid framework of the strainer. The bars a, a, a, us, a¹0 and a",
are provided with two parallel rows of holes d. The bars e which form the actual
slits, are secured to the bars a by means of end pins which are inserted in the
holes d whilst the pins at the other end enter the holes d' in the movable bars f.
The bars fare arranged in pairs upon the longitudinal bars a', a³, a³, a', a³ and al
and engage with the carriers h in pairs by means of their tappets g.
When the spindle k is rotated it causes the flange i to shift the carrier h and the
corresponding pair of bars f, f and thus rotates the bars e of two connected
systems upon their end-pins which are inserted in the fixed bars, until a suitably
arranged pointer, indicates the desired width of slit upon a scale. By this means
two rows of bars may be simultaneously adjusted as desired without interruption
of the work.
In a strainer of this kind for working on the horizontal system the shifting of
the slits is effected essentially in the same way. In place of the carriers the
movement is imparted to the paired bars ff by means of a hand wheel k¹ or
spindle by a suitably arranged double lever ', Figure 7.
In both systems the end plates 61, 62 are so formed that they close the interior
in every position of the bars e. The guard plates / prevent the bars e from
falling out.
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
1. In rotary or horizontal strainers for paper making machines, in which an
alteration in the width of the slits is effected by means of bars arranged at fixed
distances the simultaneous shifting of two rows of bars without interruption of the

page_text: work, by means of a carrier h Figures 1 to 5, or of a double lever h¹ which takes
the place of the carrier, and two paired bars f, f, substantially as set forth.
2. The improved strainers for paper making machinery hereinbefore described
and illustrated in the accompanying drawing.
Dated the 18th day of December 1894.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.