Year: 1887

page_text: Date of Application, 15th June, 1887
Complete Left, 9th Mar., 1888
Complete Accepted, 13th Apr., 1888
I, ROBERT WOOD, of 4 Ferrier Street, Leith, in the County of Mid Lothian, North
Britain, Engineer, do hereby declare the nature of this Invention to be as follows,
that is to say :-
My said Invention relates to pulp-straining apparatus of the kind in which a
pulsating action is imparted to the pulp in a manner to draw it through strainer
plates, which are fixed in a horizontal position in a shallow vat or box; and my object
is to produce the pulsating action by mechanism of an improved, simple, economical
and durable kind.
In carrying out my Invention I form one, two, or more openings in the bottom of
the box or casing, the forms and sizes of such openings being variable. In pulp-
straining apparatus of an ordinary size I prefer to have two bottom openings each
about 2 feet long by 1 foot 6 inches broad. On the edges of each opening I fix a
band of rubber or other suitable flexible material, this band being by preference of an
approximately semicircular section with the convexity outwards so as to act like a
spring and having upper and lower horizontal lips or edges directed inwards. The
lower lip of the rubber band is fixed to the edge of the bottom opening of the casing
by being gripped between it and an inner flat ring fixed by screw bolts. The upper
lip of the rubber band is similarly fixed to a plate of the shape of the bottom opening
but larger, and this plate is connected by a rod to a crank on a rotating shaft below.
The rubber bands, with the covering plates, are in separate compartments covered by
rubber sheets which are beneath the strainer plates and which equalise the pulsating
action throughout the space beneath the strainer plates. In some cases, however, the
upper rubber sheets may be dispensed with. The other parts of the apparatus may
be made as heretofore.
My improved apparatus may be used for straining various kinds of pulp for various
purposes.
EDMUND HUNT,
Applicant's Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Straining Paper Pulp and the like.
I, ROBERT WOOD, formerly of 4 Ferrier Street, Leith, in the Connty of Mid
Lothian, North Britain, but now of 12 Green Street East, Darwen, in the County of
Lancaster, 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, that is to say :-
My said Invention relates to pulp-straining apparatus of the kind in which a
pulsating action is imparted to the pulp in a manner to draw it through strainer
plates, which are fixed in a horizontal position in a shallow vat or box, and my object
is to produce the pulsating action by mechanism of an improved, simple, economical,
and durable kind.
.
In carrying out my Invention I form one, two, or more openings in the bottom of
the box or casing, the forms and sizes of such openings being variable.
In pulp-
straining apparatus of an ordinary size I prefer to have two bottom openings each
about 2 feet long by 1 foot 6 inches broad. On the edges of each opening I fix a
band of rubber or other suitable flexible material, this band being by preferonce of an
approximately semicircular section with the convexity outwards so as to act like a
spring and having upper and lower horizontal lips or edges directed inwards. The
lower lip of the rubber band is fixed to the edge of the bottom opening of the casing
by being gripped between it and an inner flat ring fixed by screw bolts. The upper
lip of the rubber band is similarly fixed to a plate of the shape of the bottom opening
but larger, and this plate is connected by a rod to a crank on a rotating shaft below.
The rubber bands with the covering plates, are in separate compartments covered by
rubber sheets which are beneath the strainer plates, and which equalise the pulsating
action throughout the space beneath the strainer plates. In some cases however the
upper rubber sheets may be dispensed with. The other parts of the apparatus may be
made as heretofore.
My improved apparatus may be used for straining various kinds of pulp for various
purposes.
On an accompanying sheet of explanatory drawings 1 simple and convenient modi-
fication of my improved pulp-straining apparatus is shown, figure, 1, being a
sectional side elevation, and figures, 2, and 3, a plan and vertical section of one of the
rubber bands, 4.
In the apparatus shown in figuro, 1, there are stationary horizontal strainer plates, 5,
and beneath those plates, 5, there is in each half of the machine an opening, 6, in the
bottom of the box, around the edges of which there is fixed a band, 4, of rubber of
the form shown in the figures. A plate, 7, is fixed to the upper lip of the rubber
band, 4, and has jointed to it at the middle of its under side the upper end of a con-
nocting rod, 8, which has its lower end jointed to a crank on a rotating shaft, 9,
driven by means of pulleys, 10, and a belt. In this example the space under the

page_text: strainer plates, 5, is not divided into separate compartiments, and there are no rubber
sheets interposed between the strainer plates, 5, and the pulsating plates, 7.
Haying 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 :-
In pulp straining apparatus having stationary horizontal strainer plates, the mode
of imparting a pulsating action to the pulp, by plates moved by rotating cranks or
eccentrics, and placed over openings in the bottom of the box, the said plates
being connected to the bottom of the box by rubber bands substantially in the
manner hereinbefore described.
Datad this Fighth dow of Mach 1000
EDMUND HUNT,
Applicant's Agent.