Year: 1885

page_text: I ALFRED SHELDON of Wells in the County of Somerset Millwright and
Engineer do hereby declare the nature of this invention to be as follows:-
For the purpose of separating the knots from paper pulp I make use of a drum
mounted horizontally upon a frame on hollow trunnions with which the ends of
the drum are provided.
On one of the trunnions a spur wheel is fixed and a pinion engaging with this
imparts continuous rotary motion to the drum. The periphery of the drum is
composed of knotter plates which however are less massive than is usual; they are
plates of brass in which fine slots or saw cuts are formed. Along each edge of the
plate a flange is formed; the flange is not in the same plane with the slotted
surface but makes a small angle with it. The ends of these knotter plates when
they are fixed in their places in the drum abut against the trunnion discs which
form the ends of the drum and they are secured to ledges provided on these discs
to receive the plates.
Also when the knotter plates are fixed upon the drum the flange of one knotter
plate abuts against the corresponding flange of the next plate and these flanges
are fixed together by screws. The joints so formed are all parallel to the axis of
the drum and range in two circles around it an inner and an outer circle and each
flange lies in a plane radial to the axis of the drum. Thus the drum is as it were
corrugated on its periphery with corrugations parallel to the axis. The length of
slotted surface exposed will thus be about six times the diameter of the drum.
The lower part of the drum is contained within a cistern or receiver to which
I prefer to impart motion by eccentrics so that the cistern rises and falls through
a short distance.
The paper pulp to be treated is run into the drum by a trough entering it by
one of the trunnions and it finds its way through the knotter plates at the lower
part of the drum into the receiving cistern below, and from this it is drawn off for
use. The knotter plates stop back the knots and any matter which fails to pass
D71

page_text: through freely. The knots as the drum revolves are carried up to the upper side
of the drum when they fall off and they are received into a tray provided within
the drum for the purpose. They are conducted away from the tray by troughs
passing out from the trunnions on either side.
The water level in the receiving cistern is so arranged that the knotter plates
are horizontal or nearly so as they pass it. Alternate plates are horizontal on the
entrance side and the same on the exit side.
The plates meeting the water in this manner cause a suction and pressure
tending to draw the pulp through the slots and to keep the slots in the plates free
from obstruction. .

page_text: Manufacture of Paper.
I, ALFRED SHELDON of Wells in the County of Somerset Millwright and:
Engineer 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:-
'
For the purpose of separating the knots from paper pulp I make use of a drum
mounted horizontally upon a frame on hollow trunnious with which the ends of
the drum are provided.
On one of the trunnions a spur wheel is fixed and a pinion engaging with this
imparts continuous rotary motion to the drum. The periphery of the drum is
composed of knotter plates which however are less massive than is usual; they are
plates of brass in which fine slots or saw cuts are formed. Along each edge of the
plate a flange is formed; the flange is not in the same plane with the slotted
surface but makes a small angle with it. The ends of these knotter plates when
they are fixed in their places in the drum abut against the trunnion. discs which
form the ends of the drum and they are secured to ledges provided on these discs
to receive the plates.
Also when the knotter plates are fixed upon the drum the flange of one knotter
plate abuts against the corresponding flange of the next plate and these flanges
are fixed together by screws. The joints so formed are all parallel to the axis of
the drum and range in two circles around it an inner and an outer circle and each
flange lies in a plane radial to the axis of the drum. Thus the drum is as it were
corrugated on its periphery with corrugations parallel to the axis. The length of
slotted surface exposed will thus be about six times the diameter of the drum.
The lower part of the drum is contained within a cistern or receiver to which
I prefer to impart motion by eccentrics so that the cistern rises and falls through
a short distance.
•
The paper pulp to be treated is run into the drum by a trough entering it by
one of the trunnions and it finds its way through the knotter plates at the lower
part of the drum into the receiving cistern below, and from this it is drawn off for
use. The knotter plates stop back the knots and any matter which fails to pass
through freely. The knots as the drum revolves are carried up to the upper side
of the drum when they fall off and they are received into a tray provided within
the drum for the purpose. They are conducted away from the tray by troughs
passing out from the trunnions on either side.
The water level in the receiving cistern is so arranged that the knotter plates
are horizontal or nearly so as they pass it. Alternate plates are horizontal on the
entrance side and the same on the exit side.
The plates meeting the water in this manner cause a suction and pressure
tending to draw the pulp through the slots and to keep the slots in the plates free
from obstruction.
The drawings annexed shew various views of machinery constructed in the
manner above described.

page_text: Figure 1 is an end elevation-Figure 2 a plan. Figure 3 a vertical section and
Figure 4 a horizontal section of the machinery.
A A are two fixed standards supporting the two hollow axes B B of the knotter
drum C C are the end discs of the drum-D D are the knotter plates with fine
parallel slots cut in them transversely of their length-the plates rest at their ends
on projections on the inner side of the end discs and are secured to these
projections they are also secured one to another in the manner above described
and as is shown at Figures 1 and 3.
E is a large toothed wheel on one of the hollow axes B-into it gears a pinion F
which is fast on a spindle G carried in bearings by the two end frames-the
spindle has upon it fast and loose pullies to permit of its being driven by a driving
band. The large toothed wheel E also gears with another pinion H on a spindle I
and causes this spindle to revolve at the same speed as the spindle G.
On the spindles G and I are eccentrics and these eccentrics support a receiving
cistern J the cistern therefore rises and falls as the spindles revolve-K (Figure 3)
is a trough led through one of the hollow axes B-the pulp to be strained is
supplied to the interior of the drum through this trough-L is a tray mounted
within the interior of the drum and also shaped at its ends to project through each
of the hollow axes. The knots are collected as above explained in this tray and
are conveyed away through its end prolongations. -
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. The knotter drum having its periphery formed of knotter plates inclined
to one another so as to form a corrugated or zig-zag surface substantially as
described.
2. The construction of knotter machinery substantially in the manner herein
before described and illustrated in the drawings annexed.