Improvements in Apparatus for Guiding the Wirecloth of Paper Making Machines.
Year: 1884

page_text: Improvements in Apparatus for Guiding the Wirecloth of
Paper Making Machines.
I, ROBERT MARSHALL THOMSON, of Dunlop Terrace, Kirkhill, Penicuik, in the
County of Midlothian, Machineman, do hereby declare the nature of my said
Invention for "IMPROVEMENTS IN APPARATUS FOR GUIDING THE WIRECLOTH OF
PAPER MAKING MACHINES" to be as follows:-
This Invention consists of improvements in apparatus for guiding the "wire" or
wire cloth bands which carry the moist pulp in paper making machines.
In the ordinary mode of guiding the wire a roller is fitted under the carrying
band at any convenient position and is carried in a movable or adjustable bearing
at one end, so that it may be shifted by hand from a position at right angles to the
web to a position inclined thereto, and by reason of such inclination serve to guide
the wire if it should tend to take an uneven course.
"
According to my Invention I effect the shifting of the band by devices acting
automatically and arranged as follows. Upon the spindle of the usual guide roller,
and outside the edge of the wire, I fit a bevil pinion which gears into a pinion on a
short vertical spindle which is free to oscillate to a slight extent to front or rear.
On the spindle is fixed an arm rotating slowly with it, and this arm in its rotation
engages with the teeth of two star wheels, one being fitted at the front and the
other at the rear, and both on a screw spindle passing through a nut by which the
guide roller spindle is carried at its movable end. Over the "wire" or wire cloth
is fitted a framing or brackets carrying a transverse forked bar or bars in
construction similar to a belt fork and embracing the "wire This forked bar is
moved transversely by the wire whenever the latter travels unevenly, and it acts
through a bell crank lever on the vertical spindle carrying the arm which engages
with the star wheels, and tilts the spindle to front or rear according to the motion
of the wire. So long as the wire travels evenly the tilting spindle remains vertical
and the arm on it acts alternately on the front and rear star wheel, or passes over
both, but when the wire swerves to one side or the other of its even course, it acts
through the forked bar and bell crank on the tilting spindle and causes the arın on
it to engage on the star wheel in front or in rear only, so that the screw spindle is
turned in one direction and traverses the nut carrying the guide roller spindle to
front or rear. The action of the guide roller is to bring the wire back to its
normal position when the vertical spindle is again tilted to its mid position, and
either ceases to act on the star wheels, or acts alternately on each, so that the
resultant notion of the screw at each rotation of the spindle is nil.

page_text: Improvements in Apparatus for Guiding the Wire Cloth of
Paper Making Machines.
I, ROBERT MARSHALL THOMSON, of Dunlop Terrace, Kirkhill, Penicuick, in the
County of Mid Lothian, Machineman, do hereby declare the nature of my said
invention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, reference being had
to the accompanying Sheet of Drawings and to the letters and figures marked
thereon, that is to say:―
This invention consists of improvements in apparatus for guiding the "wire" or
wirecloth bands which carry the moist pulp in paper making machines.
"
In the ordinary mode of guiding the "wire a roller is fitted under the carrying
band at any convenient position and is carried in a movable or adjustable bearing
at one end, so that it may be shifted by hand from a position at right angles to the
web to a position inclined thereto, and by reason of such inclination serve to guide
the wire more evenly, or counteract the tendency to take an uneven course.
In order that the nature of my invention, and the mode of putting the same into
effect or practice may be properly understood, I shall now proceed to describe the
Sheet of Drawings which I have hereunto appended for that purpose.
The Figure on the Sheet of Drawings shows a perspective elevation of the end
part and guide roller carrying the wire web or sieve of a paper making machine
with my improvements applied thereto for guiding the wire web in an even course.
Referring to the Drawing:-By my invention I effect the shifting of the band
by devices acting automatically and arranged as follows:-Upon the spindle B¹ of
the usual guide roller B of the "wire" web A and outside the edge of the "wire,"
on the spindle of this roller I fit a bevel pinion C, which gears into a pinion C²
on its short vertical spindle C2, which is so mounted in its footstep bearing
(preferably on the bearing block B2 of the spindle B¹ of the roller B that it is free
to oscillate to a slight extent to the front or rear while yet keeping the
wheels C C in proper gear. On this spindle C is fixed an arm D rotating with
it, and this arm D in its rotation engages with the teeth of two star wheels D', D³,
one being fitted at the front and the other at the rear and both on the opposite
ends of a screw spindle E passing through a strong screw nut secured on the lower
part of the under bearing block B2 of the guide roller spindle B', and which is so
mounted on its carrying bed frame F as to be moved by the screw E to angle the
roller B in the forward or backward direction. On opposite sides of the "wire"
or wirecloth A and the main framing A', brackets A³ are formed or fitted for
securing the adjustable standards G, on which at top is mounted the horizontally
oscillating bell-crank levers g, g', which by oscillating socket blocks g², carry a
transverse forked bar a (or bars), in construction somewhat similar to a belt fork,
but having broad flat plates a¹ with rounded edges embracing the wire cloth at
the edges. This forked bar a is moved by the broad fork arins a¹ transversely by
the wire A, whenever the latter travels unevenly to one side or the other, and
it acts through the bell crank lever g, gl, on the vertical spindle C² carrying the

page_text: arm D, which engages with the star wheels D¹ D³, and tilts the spindle C to front
or rear according to the motion of the wire A. So long as the wire A travels
evenly the tilting spindle 0 remains vertical and the arm D on it acts alternately
on the front and rear star wheel D₁ D' very slightly, or may pass over both, but
when the wire A swerves to one side or the other of its even course, it acts through
the forked bar a a¹ and bell crank g, g¹, on the tilting spindle C, and causes the
arm D on it to engage on the star wheel D¹ in front, or the one D' in rear only, 80
that the screw spindle E is turned in one direction and traverses the nut carrying
the guide roller & spindle B B¹ to front or rear as the case may be. This action of
the guide roller B is to bring the wire A back to its normal working position,
when the spindle C is again tilted to its vertical mid position, where the arm D
either passes the star wheels D¹ D², or acts alternately on each, so that the
resultant motion of the screw at each rotation of the spindle corrects the other
and is nil.
Having now 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
In paper making machines, making the lateral motion of the wirecloth oscillate
a bar and intermediate levers and wheels turning a screw, so that the rotation of
the guide roller angles its own axis to guide the wirecloth all automatically,
substantially as herein described and shown in the accompanying Drawings.
Dated this 24th day of October 1885.