Year: 1886

page_text: Date of Application, 31st Aug., 1886.
Complete Left, 31st May, 1887.
Complete Accepted, 1st July, 1887.
I, JAMES MCFARLANE of the firm of James Milne and Son, Milton House Works
Edinburgh, in the County of Mid-Lothian, Engineer, do hereby declare the nature of
this invention to be as follows:-
This invention relates to improvements in engines for preparing pulp in the manu-
facture of paper or for other analogous purposes and the engine as constructed under
the invention consists of a trough or case so curved and shaped as to receive two rolls
which are preferably made of cast iron and are fitted with bars or knives pitched at
equal or other distances apart. The rolls which are placed at one side of the trough
and laid parallel or at an angle to each other are centred on spindles carried in brackets
or bearings cast or fixed on the sides of the trough and they are caused to rotate in
opposite directions by gearing or by belts or ropes passed round pulleys secured on
one end of their respective spindles.
Under the rolls and in the trough, bed or knife plates are situated and the pulp is
discharged or delivered from the rolls over "backfalls" which are so formed or placed
in the trough that the pulp travels from the ends of the trough underneath the rolls to
the centre where it is mixed; or the pulp from each roll may be made to travel from
the centre of the trough underneath the rolls and over a backfall" at each end from
whence it again passes to the centre and into the rolls; or the pulp may be made to
travel by side or centre passages underneath or over the "backfalls" and rolls as may
be found most convenient. To direct the pulp and ensure its more perfect circulation
the rolls and "backfalls" are fitted with covers having a stripping arrangement and
by this combination of trough with two rolls and covers, as described, the circulation
and preparation of the pulp is effected more rapidly and equally, the amalgamation of
coloring matter when such is used being also expedited.
The bearings for the spindle of each roll are fitted with wedge lifting gear so arranged
and operated from the front of the trough that the rolls may be lifted or lowered, equal
or otherwise, at pleasure, the bed plates under the rolls being similarly provided for
the like purpose.
The apparatus arranged as herein before described may be used for washing,
potching, or beating any class or description of fibre used in the manufacture of paper
or for other analogous purposes.
D
1
1
ր A
1000
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow,
Agents,

page_text: COMPLETE SPECIFICATION.
Improvements in Pulping, Washing, Potching, or Beating Engines.
I, JAMES MCFARLANE of the firm of James Milne and Son, Milton House Works,
Edinburgh, in the County of Mid-Lothian, Engineer, do hereby declare the nature of
this invention and in what mauner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention relates to improvements in engines for preparing pulp in the manu-
facture of paper or for other analogous purposes and as seen in front elevation at
figure 1, in plan at figure 2, in longitudinal vertical section at figure 3, and in
transverse section at figure 4 sheet 1 of the annexed drawings the engine as con-
structed under the Invention consists of a trough or case A, wherein are carried
two rolls B, preferably made of cast iron. The rolls may be laid parallel or at an
angle to each other and they are placed at one side of the trough A, which at that
part has its bottom shaped as indicated at figure 3, and they are carried on
spindles C, supported in bearings D, at each side of the trough. Each roll is fitted
with knives E, arranged in series pitched at equal or other distances apart and under
the rolls the bottom of the trough is recessed to receive bed or knife plates F,
between which and the knives E, as the rollers are rotated, the pulping action is
effected. The rolls B, have on one end of their spindles rope pulleys G, through
which they are driven in opposite directions one set of ropes communicating motion
from the main or driving shaft to both rolls by conducting the ropes round the
pulleys G, and round a guiding or stenting pulley I, as indicated at figure 1, or
in lieu of ropes a driving belt or band may be similarly employed or the rolls may
be rotated in opposite directions by gearing them together, or by separate belts
or ropes.
The pulp is fed into the engine in the ordinary way and after each action upon
it by the knives E and F, it is delivered by the rolls B, into the centre compart-
ment or "back fall" J, which runs from the front towards the back of the trough and
the bottom of which is inclined as indicated at figure 4. In the compartment or
"back fall" J, the pulp from both rolls is thoroughly mixed and amalgamated and
from the said compartment it flows in the direction of the arrows figure 2 to the ends
of the trough preparatory to again coming under the action of the knives E, F.
The
The rolls B, are provided with the ordinary covers K, resting at the front upon the
edge of the trough and at the back supported on the webs L, constituting the sides of
the channels M, into which the pulp is delivered from the "backfall" J.
covers K, confine the pulp and ensure its more perfect circulation and with the like
object the "backfall" J, has also a special cover_N, provided with stripping
arrangements a, for clearing the pulp from the knives E.
By this combination of the trough with two rolls and covers as described the
circulation and preparation of the pulp is effected more rapidly and equally, the
amalgamation of colouring matter when such is used being also expedited.

page_text: Under a modification of the arrangement illustrated by figure 1 sheet 2 of the
drawings the pulp from each roll instead of passing through a back fall" whose
length is at right angles to the length of the trough as described with reference to
sheet 1 may pass through channels O, under the "back fall" J, to the ends of the
trough and thence to the rolls B in the direction of the arrows or as seen by figure 2
sheet 2 the pulp may be delivered from the upper part of each roll on to the incline P,
thence to the "backfall" J, where the pulp from each roll is mixed and amalgamated
falling therefrom into the lower parts Q of the trough and thence passing again to
the rolls.
Under any of these modifications the bearings of the spindle C, of each roll are as
seen at figures 1 and 2 sheet 1 furnished with lifting gear consisting of a wedge piece b,
resting on an inclined surface c made in the block for the bearing d of the spindle the
said wedge pieces having their upper surfaces formed to suit the bearing block. From
each wedge piece a screwed spindle e, extends upwards these spindles having each
upon it a worm wheel geared with a worm screw g on a shaft h, laid parallel to the
spindle C, the shaft / having on one end of it a handing wheel by turning which the
bearings of each roll are raised or lowered in unison.
If desired the blocks for the bed or knife plates F, may be similarly provided for
the like purpose.
The apparatus arranged as hereinbefore described is provided with the usual stuff
and wash out valves, water cistern and other ordinary appurtenances and besides being
used for pulping it may be employed for washing, potching or beating any class of
fibre used in the manufacture of paper or for other analogous purposes.
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 general arrangement and combination of parts constituting the improved
pulping, washing, beating or potching engine substantially as described with reference
to sheets 1 and 2 of the appended drawings.
2. In an engine of the class set forth the combination of two rolls rotating in
opposite directions and by the action of which the pulp from both rolls is thrown
into a central space and mixed or amalgamated previous to again being acted upon
substantially as described with reference to sheets 1 and 2 of the drawings annexed.
3. In an engine of the class described the combination of two rolls each with a cover
over it and a chamber between also with a cover over it provided with strippers to
clear the pulp from the rolls substantially as described with reference to sheet 1 of
the appended drawings.
4. In an engine of the class set forth wedge lifting gear for the rolls acting
substantially as described with reference to figures 1 and 2 sheet 1 of the appended
drawings.
DL:
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