Improvements in or appertaining to Sieving or Separating Apparatus, particularly applicable for Use in Paper Making.
Year: 1895

page_text: Date of Application, 25th Nov., 1895
Complete Specification Left, 17th Aug., 1896-Accepted, 31st Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in or appertaining to Sieving or Separating Apparatus,
particularly applicable for Use in Paper Making.
We, WILHELM SCHMIDT of Lambrecht and CHRISTIAN SEYBOLD of
Zweibrücken both in the Palatinate in the Empire of Germany, Manufacturers,
do hereby declare the nature of this invention to be as follows:-
This invention has for its object, to impart to the sieve or straining device of
paper machines its peculiar shaking movement in a horizontal plane, and only to
cause the end of the sieve to completely oscillate, as is obtained by the means
hitherto employed where the sieve was placed on oscillating supports and driven
from one end only. These supports give rise to shocks, on account of the link
connections becoming loose, and the shocks are increased by the sieve standing at
the highest point in the middle of its movements, so that the shock resulting from
the movement itself, is further increased by the acceleration of the fall towards the
sides.
The shocks resulting from this are of such a severe nature that the bars or rails
carrying the rollers and suction boxes become bent, or must be made so heavy that
the whole working of the machine suffers thereby. The supports under the sieve
are also inconvenient owing to the space of the suction boxes, and the like, being
reduced.
In order to overcome these drawbacks the driving and suspension of the sieve is
so arranged that shocks of any sort are as far as possible avoided, and so far as they
are unavoidable they will not at least tend to cause any bending of the carrying
rails.
For this object the sieve is no longer supported from beneath, but suspended
from above. It is suspended on suitable springs, and thereby two advantages are
obtained, namely that hinges or joints are avoided, and the springs act as a brake
at the end of the movement.
The driving takes place longitudinally from one end of the machine only and
that where the movement is strongest, a shaft working intermittently being
arranged parallel to the frame of the sieve. This shaft has at certain distances
apart catches the length of which diminishes towards the point of rotation of the
sieve. These catches are connected with suitable spring bands arranged at the
sides of the sieve and so impart to the different points of the frame suitable
guiding intermittent movements and thus prevent the bending of the bars or
rails.
In the accompanying drawing
Figure 1 is a longitudinal section of the improved apparatus;
Figure a transverse section;
Figure 3 a plan and
Figure 4 a side view of the driving shaft.
The guide bars or rails R R carry the sieve and the rollers W. Columns S are
arranged at the side of the sieve on which columns, by means of clamp K,
springs F and adjustable suspension pieces H, the bars or rails R are suspended.
In consequence of this suspension the sieve can oscillate free from shock. By
this mode of suspension an important influence is also exerted on the paper
produced, as the new movement insures a better felting of the fibres and a clearer
product.

page_text: Motion is imparted by means of the shaft A arranged at the side of the
apparatus, said shaft being mounted in brackets or supports on the columos S.
This shaft A is provided with suitable connecting pieces M' which run under the
connected ends of springs L fastened at the sides of the bars or rails R, and
imparts at each oscillation by means of their catches which are of different length
to the points in question, the exact amount of movement necessary for producing
the working of the apparatus without bending the rails or bars.
Dated this 23rd day of November 1895.
WM. P. THOMPSON & Co.,
Of 6 Lord Street, Liverpool, Agents for the Applicants.
Improvements in or appertaining to Sieving or Separating Apparatus,
particularly applicable for Use in Paper Making.
We, WILHELM SCHMIDT of Lambrecht and CHRISTIAN SEYBOLD of
Zweibrücken both in the Palatinate in the Empire of Germany, Manufacturers,
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 has for its object to impart to the sieve or straining device of
paper machines its peculiar shaking movement in a horizontal plane and only to
cause the end of the sieve to completely oscillate as is obtained by the means
hitherto employed where the sieve was placed on oscillating supports and driven
from one end only. These supports give rise to shocks, on account of the link
connections becoming loose, and the shocks are increased by the sieve standing at
the highest point in the middle of its movements, so that the shock resulting from
the movement itself, is further increased by the acceleration of the fall towards the
sides.
The shocks resulting from this are of such a severe nature that the bars or rails
carrying the rollers and suction boxes become bent, or must be made so heavy that
the whole working of the machine suffers thereby. The supports under the sieve
are also inconvenient owing to the space of the suction boxes, and the like, being
reduced.
In order to overcome these drawbacks the driving and suspension of the sieve are
so arranged that shocks of any sort are as far as possible avoided, and so far as they
are unavoidable they will not at least tend to cause any bending of the carrying
rails.
For this object the sieve is no longer supported from beneath, but suspended
from above. It is suspended on suitable springs, and thereby two advantages are
obtained, namely that hinges or joints are avoided, and the springs act as a brake at
the end of the movement.
The driving takes place along the whole sieve from one end of the machine only
where the movement is greatest, a rock shaft being arranged parallel to the frame
of the sieve. This shaft has at certain distances apart projections or catches,
the lengths of which diminish towards the point of rotation of the sieve. These
catches are connected with suitable spring bands arranged at the sides of the
sieve and so impart to several points of the frame suitable guiding intermittent
movements and thus prevent the bending of the bars or rails.
In the drawing accompanying the Provisional Specification -
Figure 1 is a longitudinal section of the improved apparatus ;
Figure 2 a transverse section;
Figure 3 a plan, and
Rice & a side view of the driving shaft

page_text: The guide bars or rails R R carry the sieve and the rollers W. Columus S are
arranged at the side of the sieve, on which columns, by means of clamp K,
springs F and adjustable suspension pieces H, the bars or rails R are suspended.
In consequence of this suspension the sieve can oscillate free from shock. By
this mode of suspension an important influence is also exerted on the paper
produced, as the new movement insures a better felting of the fibres and a clearer
product.
Motion is imparted by means of the rock shaft A arranged at the side of the
apparatus, said shaft being mounted in brackets or supports on the columns S.
This rock shaft A is provided with suitable projections or catches M1, M2, M³, of
different lengths as before stated connected with the ends of springs L fastened at
the sides of the bars or rails R, and imparts to the several points of the sieve
at each oscillation by means of its catches M', M³, M', the exact amount of
movement necessary for producing the working of the apparatus without bending
the rails or bars.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is-
1. The improvement in sieving or separating apparatus for use in paper making,
which consists in suspending the sieve on springs substantially in the manner
herein before set forth.
2. In a sieving or straining apparatus for use in paper making, the means for
imparting motion to the sieve comprising a shaft arranged parallel to the sieve and
provided with catches connected at various points to the sieve, substantially as
hereinbefore described.
3. The general arrangement and construction of improved sieving or separating
apparatus for use in paper making substantially as hereinbefore described and
illustrated.
Dated this 15th day of Angust. 1896.
WM. P. THOMPSON & Co.,
Of 6 Lord Street, Liverpool, Agents for the Applicants.