An Improved Machine for Washing and Preparing Paper Stock.
Year: 1895

page_text: 'Date of Application, 21st May, 1895-Accepted, 22nd June, 1895
COMPLETE SPECIFICATION.
An Improved Machine for Washing and Preparing Paper Stock.
We, THOMAS CADWALADER CADWGAN, of Anderson, in the 'County of
Madison, and 'State of Indiana, United States of America, Machinist, and THE
O. S. KELLY Co. of Springfield, in the County of Clark, and State of Ohio,
'United States of America, a corporation, 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 and accompanying
drawings :-
:―
Our invention relates to improvements in machines for washing and preparing
paper stock; the object of our invention being to provide a machine into which the
stock may be fed continuously and be thoroughly washed and scoured while passing
through the same and discharged therefrom after being separated from the water
with which it is treated.
We attain.these objects by the constructions shown in the accompanying drawings,
in which-
Fig. 1 is a side elevation of a machine embodying our invention. Fig. 2 is a
longitudinal sectional view of the same. Fig. 3 is a transverse sectional view of
the same through the discharge pipe or opening.
Like parts are represented by similar letters of reference in the several views.
In the said drawings, a represents an outer casing preferably formed of two
parts al a², the two parts being adapted to join together so that the upper part a¹ is
removable.
Journaled in suitable bearings at each end of the casing, which bearings are
also.formed in the nature of glands or stuffing boxes to prevent leakage from said
casing, is a revolving cylinder or rubber c, formed on its outer periphery with ribs c'
and flexible wipers or rubbers c, preferably made of leather or other suitable
flexible material. These ribs or wipers are placed on the cylinder in a spiral
direction, and the cylinder itself is tapered from end to end so as to be substantially
.conical in shape.
The bottom portion a² of the outer casing is recessed on each side, as shown at a³,
and adapted to receive projecting ribs or bars a', which extend from side to side
of said casing on the arc of a.circle whose center is at.the center of the revolving
cylinder c. On these bars is supported a screen d, having meshes sufficiently fine
to prevent the escape of any of the paper stock, but to readily permit the water to
pass-through the same. The upper part of the casing a' is adapted to fit over the
lower part a², the respective parts having projecting .flanges a a', adapted to he
united together by bolts, or secured in any other suitable manner, the upper flange aⓇ
resting on the bars a, and thus serving to hold the screen firmly in position when
the parts are united together. The rear or large end of the cylinder or rubber c
is provided with a series of 'blades esc, each alternate blade c being preferably
extended so as to run in close proximity to the screen 'd, which is extended from
one end of the casing to the other. The other blades c are preferable made
shorter and project slightly beyond.the.main .body of the cylinder.or rubber c.
The upper half of the casing a a is formed eccentric to the revolving rubber c;
that is to say, the top thereof is further removed from the cone and its rubbers
17

page_text: than the sides thereof so as to form a reservoir or rubbing chamber a³, in the upper part
of said casing. An auxiliary chamber a, in which the blades c³ care adapted to.
extend is formed at the rear end of said casing by a partition a¹º, which extends
downwardly from the upper half a of the casing a a to within close proximity to
the main body of the rubber or cone c. This partition alo prevents the passage of
the stock from the chamber as to the chamber a in the upper half of the casing; the
lower half of the casing, the bottom of which is formed of the screen d, having no
such obstruction, so that the stock is carried down along the screen d before it can
pass into contact with the blades c³ c.
The stock mixed with a sufficient quantity of water is admitted through the
supply pipe or opening all at the small end of the casing and is carried by the ribs
and wipers c¹³ around with the rubbing cylinder; the enlarged space or chamber
in the top of the casing is kept well supplied with water both by reason of the
ample supply pipes and by being more or less retained therein by the action of the
cylinder. The stock being carried around by the cylinder will follow the outer
walls of the casing by the centrifugal force, and will pass upwardly into the
reservoir where it will be thoroughly rubbed, or, perhaps, more properly speaking,
churned by the action of the ribs and wipers and the centrifugal force of the
revolving cylinder. An auxiliary opening a¹ is provided in close proximity to the
partition a through which a stream of water is introduced to come in contact with
the stock prior to the time it passes through the chamber a in contact with the
lifting blades ³ c¹.
To guard against damaging the screen or other portions of the machine by the
introduction of hard, foreign substance, we form immediately under the supply
opening a a chamber as, having a removable plate a¹ at the bottom thereof.
This chamber is made of considerable depth and in the event that a heavy foreign
substance enters with the stock, it drops into said chamber and may be removed by
removing the piate a¹4. If desired, this plate a¹ may be secured so as to become
disengaged under an unusual pressure and thus automatically release any hard
foreign substance in the event that it should be forced into said pocket or chamber
by the action of the revolving cylinder.
The stock is gradually carried by the ribs and rubbers along the screen d and
forced into the chamber a, where it is engaged by the lifting blades c³ ³, and
carried around in contact with said screen and discharged through the outlet c.
It will be noticed that the blades are not radial but are formed tangent to a
circle slightly larger than the shaft or journals of the revolving cone or cylinder;
the effect being to incline the blades backwardly in the direction of travel, which
causes the stock engaged thereby to be pushed to a slight extent outwardly in
contact with the screen so as to press the water out of the same as it passes around
with said blades, and also to more readily clear said blades and be discharged
through the opening a16 by the revolution thereof.
The lower portion a² of the outer casing is extended downwardly and is provided
with a suitable outlet opening a, through which the water is permitted to escape
into any suitable trough or conduit by which it may be conveyed to any desired
point of discharge.
By the constructions thus described we provide a machine in which paper stock
may be continuously and effectually washed and prepared by the simple passing
through said machine; the stock and the water in which it is washed or by which
it is treated being separated effectually.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1. A. machine for washing paper stock consisting essentially of an outer casing,
an inner revolving cylinder having ribs or rubbers thereon, a closed chamber
formed at the top of said casing above said cylinder, and a water discharge at the

page_text: bottom of said casing below said cylinder, and means for preventing the. escape of
the stock through the water discharge, substantially as specified.
2. In a machine for washing paper stock, the combination with an outer casing
and an inner revolving cylinder, flexible, wipers or rubbers on said, cylinder, a
concave screen in the bottom of said casing with which said rubbers are adapted to
contact as the cylinder revolves, and an upper extended chamber formed in said
casing above said cylinder, said chamber being closed at the top and provided with
a water supply, substantially as specified.
3. The combination with an outer casing and an inner cone-shaped revolving
cylinder, a concave screen formed concentric with said cylinder arranged in the
bottom of said casing, and an enlarged chamber or reservoir in the top of said
casing, and a partition extending downwardly in said reservoir to form an auxiliary
chamber, and blades or lifting paddles secured to said cylinder and adapted to
operate in said auxiliary chamber, and a discharge opening leading from said
auxiliary chamber, substantially as specified.
4. The combination with the outer casing formed in two parts as described, the
lower part being recessed at each side to receive the side bars of a screen retaining
support, a concave screen supported on said side bare, a cone-shaped cylinder
revolving in suitable bearings in said casing and formed concentric with said
screen, a supply opening in said casing at the small end of said cylinder, and a
discharge opening at the large end of said cylinder, and inclined blades or paddles
on said cylinder revolving opposite said discharge opening, substantially as
specified.
5. The combination with the outer casing having an inner revolving cone-shaped
cylinder, ribs and wipers on said cylinder, and a screen in the bottom of said casing
concentric with said cylinder, an enlarged chamber or reservoir in the top of said
casing above said cylinder, and an auxiliary chamber divided from said reservoir
by a partition extending downwardly from said casing, a water supply opening
adjacent to said partition, and lifting blades or paddles connected to said cylinder
and adapted to revolve in said auxiliary chamber, and a discharge opening leading
from said auxiliary chamber, substantially as specified.
6. The combination with the outer casing formed at each end with suitable
glands adapted to form bearings, a cone-shaped revolving cylinder revolving in
said bearings, a concave screen in the bottom of said casing, an enlarged chamber
or reservoir in the top of said casing, ribs or wipers arranged spirally on said
cylinder, blades or paddles at the enlarged end of said cylinder, and a partition
extending downwardly from the top of said casing to divide said wipers from said
paddles, a supply opening at the small end of said casing and a discharge opening
at the large end of said casing, a pocket or chamber under said supply opening, and
said discharge opening being arranged opposite the blades or paddles, substantially
as specified.
7. The combination with an outer casing having an inlet or supply opening, and
a pocket or chamber under the same, a concave screen extending from a point in
proximity to said pocket or chamber to the rear end of said casing, spirally
arranged ribs or rubbers on said cylinder adapted to revolve in proximity to said
screen, and inclined blades or paddles also connected to the large end of said
cylinder, each alternate blade or paddle being extended so as to run in close
proximity to said screen, and a discharge opening opposite said blades or paddles,
substantially as specified.
8. The combination with an outer casing having an upper enlarged chamber or
reservoir, and a lower water discharge opening, a concave screen in the lower part
of said chamber, and a revolving cone-shaped cylinder having wipers adapted to
run in proximity to said screen, a partition in the upper part of said casing to form
an auxiliary chamber, and inclined blades or paddles operating in said auxiliary
chamber, a supply opening leading to said chamber, and a pocket or chamber
under said supply opening, a water inlet arranged in proximity to said partition

page_text: and extending into said chamber or reservoir, and a discharge opening leading from
said auxiliary chamber to a point above the center of said cone or cylinder, sub-
stantially as specified.
Dated this 20th day of May 1893.
E. K. DUTTON & Co.,
.5 John Dalton Street, Manchester, Chartered Patent Agents,
For the Applicants.