Improved means for straining pulp
Year: 1888

page_text: We, THOMAS GOODALL, Manager, and THOMAS WEBSTER, Engineer, both of the
Hendon Paper Works Company, Limited, Sunderland, County of Durham, do hereby
declare the nature of the said 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 relatos to certain improvements upon or applicable to the Invention
for "Improved means for straining pulp" for which Letters Patent No. 5528, dated
the 15th day of April, 1887, were granted to us the said Thomas Goodall and
Thomas Webster.
The Invention consists essentially in the construction or arrangement of such
apparatus in the improved manner hereinafter described, and in the application to
such improved apparatus of the hereinafter described improved means of actuating the
reciprocating discs, by the operation of which the straining of the pulp is caused to
be effected through the vertically arranged straining plates as described in the
specification of such Patent.
The improved apparatus is illustrated on the accompanying drawings in sectional
elevation in Figs. 1. and, 2, Fig. 3. being a plan view, partly in section, of Fig. 1.
According to the present improvements, the vat, 4, is so arranged as that its outer
sides are closed, the vertical strainer plates, 5, being arranged therein and retained in
position substantially in the manner described in the specification of the said Patent.
When the improved apparatus is constructed with a single pair of opposite strainer
plates the pulp material fed into the vat on the outer sides of such plates; and when
the improved apparatus is constructed with more than one pair of opposite strainer

page_text: plates each such pair is isolated from the next adjacent pair by a partition, C, or
otherwise in any suitable manner, and the pulp is led into the vat on the outer sides
of each of such pairs of strainer plates.
According to the present improvements also, the reciprocating discs, 7, are operated
by improved means which in apparatus constructed with more than one pair of
opposite strainer plates economises the space occupied by the machine.
In the modification represented in Figs. 1, and, 3, each pair of discs, 7, is connected
to or carried by a frame, 8, so constructed and arranged as that each disc is supported
in one of the openings, , surrounded by the rims, 10, of the strainer frames, 11, the
inner and outer edges of elastic annular diaphragms, 12, being secured to the rims, 10,
and to the edges of the dises, 7, respectively, by rings, 13, and bolts, 14.
The required reciprocating movements are in accordance with such modification of
the present improvements, imparted to each connected pair of dises, 7, by a lever
motion in which a lever, 15, is suspended hotween each pair of dises in such a manner
as to operate directly upon the latter or as to engage with the said frame thereof and
impart the required reciprocations to the discs. The lover, 15, is preferably arranged
as a pendulum lover centred and free to oscillate on a pin, 16, supported by suitable
bearings, 17, holted to the strainer frames or to the vat, its free ond being connected
by a pin, 18, to a rod, 19, which has a vibrating motion imparted to it by a crank
pin, 20, on a shatt, 21, to which rotary motion may be imparted by a belt and pulley
or otherwise in any suitable manner.
When the improved apparatus is constructed with more than one pair of the said
dises the second and following pairs may be simultaneously operated from the same
crank pin by connecting the levers, 15, by a rod, 22, substantially in the mauner
represented in Fig. 1.
In lieu of the lever being suspended at, 16, it may be centred or supported at any
other convenient point, and may also be connected at any convenient or desired point
to the rod, 19, or other equivalent means operating it; and any required extent of
movement may be given to the discs at each operation by arranging the point of
support of the lever and the point of its connection with the connecting rod relatively
to the disos, and the throw of the crank pin, as required.
In the modification represented in Fig. 2. each pair of opposite discs, 7, is operated
by a vertically reciprocated rod, 23, each dise being suspended by a rod, 24, capable
of oscillating on a supporting pin, 25, and being connected to the rod, 23, by
links, 26. The rod, 23, is guided in top and bottom guides, 27, and has the desired
reciprocating movements imparted to it by means of a rod, 28, connecting it with a
crank pin, 29. Tho said pin, 25, and guides, 27, may form parts of or may be
supported by the strainer frames, or may form parts of an independent casting or
frame supported by the strainer frames.
In apparatus constructed in accordance with the prosent improvements any pair of
plates may be cleaned without stopping or interfering with the action of the others,
thus enabling tho machine to run continuously without stoppage for cleaning.
Having now particularly described and ascertained the nature of the said invention,
and in what manner the same is to be performed, we declare that what we claim is :-
1. The hereinbefore described improvements in the construction of apparatus for
straining pulp.
2. In combination, the vat formed with closed sides and adapted or provided with
opposite vertically arranged transverse strainer plates, with opposite reciprocating
discs flexibly mounted in opposite openings in the strainer frames botween such
strainer plates, substantially as hereinbefore described, and with means of reciprocating
the said discs.
3. In combination, the vat formed with closed sides and adapted or provided with
opposito vertically arranged transverse strainer plates, with opposito reciprocating
discs flexibly mounted in opposite openings in the strainer frames and between onch
pair of strainer plates, and with isolating partitions butween each adjacent pair of 5
strainor platos substantially as herein before described,

page_text: 4. The application of opposite reciprocating discs flexibly mounted in opposite
openings in the strainer frames between each pair of strainer frames, in apparatus
adapted for the purpose of the Invention.
5. The application to apparatus of the hereinbefore described improved formation
5 of the hereinbefore described improved means of imparting the required reciprocating
movements to the opposite discs.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicants.