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Патент USA US3066741

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Dec. 4, 1962
c. A. LEE
3,066, 73 1
PAPERMAKING MACHINE
Filed Sept. 21, 1959
2 Sheets-Sheet 1
NW Q“
Dec. 4, 1962
c. A. LEE
3,066,731
PAPERMAKING MACHINE
Filed Sept. 21, 1959
2 Sheets-Sheet 2
United States Patent ()?ice
Zi?dhJBl
Patented Dec. 4%, 1962
1
2
3,066,731
vide an improved breast roll so constructed that it is
not subject to such accumulation of stock ?ber; and,
in this connection, it is an object to provide a breast roll
which has an internal cavity within the vanes that is
Delaware
' deeper than such cavities in prior rolls, allowing a freer
water flow and more effective drainage from the roll.
Filed Sept. 21, 1959, Ser. No. 841,219
3 Claims. (£1. 162-289)
It is also an object of the invention to provide an
improved breast roll that is more easily cleaned than prior
My invention relates to papermaking machines and
rolls and more particularly to provide a roll that has
more particularly to such machines of the Fourdrinier 10 straight vanes allowing water to be jetted into the cavity
type.
through the vanes. It is also an object to render the cavity
PAPERMAKING MAtlHlNE
Charles A. Lee, Knoxville, Tenn, assignor to Kimberly
Clark Corporation, Neenah, Wis, a corporation of
A Fourdrinier papermarking machine comprises, in
general, a plurality of rolls having a wire travelling
around the rolls at high speed. An aqueous suspension of
?ber, commonly designated as “stock,” is supplied on to
the Fourdrinier wire through which water is drained so as
to form a wet paper web. Various devices, such as table
within the vanes accessible to streams of water from the
ends of the rolls, such as through aligned openings pro
vided in the roll ends and in the radial rings.
The invention consists of the novel constructions, ar
rangements and devices to be hereinafter described and
claimed for carrying out the above stated objects, and such
other objects, as will be apparent from the following de
scription of a preferred embodiment of the invention,
rolls and suction boxes beneath the wire, are commonly
utilized for increasing the rate at which water is With
drawn from the web.
20 illustrated with reference to the accompanying drawings,
Prior to the development of the pressure forming type
wherein:
of papermaking machine, it was the general practice to
FIG. 1 is a longitudinal sectional view of a breast
form the mat of ?bers of which the paper web is com
posed by ?owing or spouting on to the Wire a layer of
stock. The water drained from the stock through the Wire
sufficiently so that, at the end of a horizontal pass of the
wire, the formed web constituted a coherent sheet capable
of being couched off the wire.
roll embodying the principles of the invention;
FIG. 2 is a partial sectional view of the breast roll
on an enlarged scale taken on line 2-2 of FIG. 1;
FIG. 3 is a partial longitudinal sectional View of the
breast roll also on an enlarged scale; and
FIG. 4 is partial longitudinal sectional view of the
Subsequently faster operating machines were developed
of the pressure forming type. In this type, the stock,
breast roll on a still greater enlarged scale.
while contained within an enclosed ?ow conduit, is
applied to a restricted area of the wire as a relatively high
energy flowing stream. The stream is under substantial
hydraulic pressure, and the pressure energy component of
the stream of stock applied to the wire is usually quite
large in relation to the velocity energy component. A
large portion of ‘the water in the stock mixture is there
roll may be seen to comprise a pair of heads 10 each
fore forced through the wire in the Web forming region
at a relatively high rate. The web forming region in a
machine of this type is quite commonly at the periphery
of a so called breast roll, which, together with a couch
roll and idler and table rolls, support the Fourdrinier
Wll‘3.
As is discosed in my prior Patent No. 2,756,649,
issued July 31, 1956, on Flow Control Apparatus for a
Fourdrinier type paper machine, the breast roll beneath
the area on the Fourdrinier wire on which the stock is
Referring now to the drawings, the illustrated breast
having a shaft 11 fixed therein. A cylindrical shell 12
is disposed over the heads it} and ?ts against a shoulder
13 formed on each of the heads iii. The shell 12 is
' welded to the heads it} by means of annular welds 14.
A plurality of support rings 15 are disposed on the
shell 12. Each of the support rings 15 comprises a cy
lindrical base portion l6 and a radially extending ring
portion 17 having a plurality of equally spaced openings
3.8 therethrough. The cylindrical base portions 16 ?t on
the shell 12 and are welded together as at 19.
An end ring 29 is ?xed on each end of the roll. Each
end ring comprises a cylindrical shell portion 21 and is
provided with a plurality of equally spaced openings 22
therethrough. The openings 18 of the support rings 15
are in alignment, and the end rings 2% have the same
number of openings 22 which are in alignment with the
deposited may be or” an open type having a plurality of
openings 18.
general radially extending bent vanes supported by a plu
A so called “water ?inger” annular part 23 is ?xed on
50
rality of radial rings, with a helical who being disposed
each shaft 11. A cover plate 24 extends between the
over the vanes to directly support the Fourdrinier wire
cylindrical portion 21 of each of the end rings 20 and
running on the breast roll. The breast roll is made open
the adjacent part 23. Each cover plate is detachably
in this manner so that water from the stock as it is de
posited under pressure on the wire may ?ow directly
held in place by means of screws 25.
A plurality of vanes 26 extend longitudinally of the roll
through the wire and through the breast roll, helping to
and are disposed in slots 27 provided in the support rings
rapidly withdraw the water from the paper web and allow
15. A wire 23 is helically wound around the roll and
faster operation of the machine. In some cases, open
is disposed in slots 2% provided in the outer ends of the
breast rolls of this type utilize vacuum chambers therein
vanes 26. As wiil be observed from FIG. 2 in particular,
for the purpose of increasing the water drainage from the
the vanes 26 in cross section are ?at; and, in the particular
web at the time the stock is deposited on the wire, such iii)
illustrated
embodiment, they extend at 45 degrees with
an open vacuum breast roll also being illustrated in my
respect to a radial line 3t} passing through the center of
prior Patent 2,75 6,649.
the breast roll. The illustrated breast roll rotates in the
It has been found with such breast rolls that after
direction shown by the arrow 31, and, as will be observed,
periods of usage there occurs an accumulation of stock
the vanes 2e are canted from the support rings 15 in the
?bers within the vanes and between the rings supporting
direction of rotation.
the vanes which causes poor and uneven formation of the
In a particular embodiment of the improved breast roll,
paper Web. Due to the fact that the vanes have been bent
the outer diameter of the base portions 16, constituting in
and due to the fact that access is not available from the
e?ect the outer diameter of an internal core of the breast
ends of the rolls, it has generally been very difficult to
roll, was 16% inches. The outer diameter of the breast
70
clean the breast rolls of such stock ?ber accumulation.
roll as a whole was 25 inches, so that the cavity of the
It is therefore an object of the present invention to pro
breast roll, extending from the outer cylindrical surfaces
3,066,731
to this openness of construction and the increased facility
of the base portions 16 to the outer edges of the wire 28,
of the breast roll to pass water and air therethrough. The
was substantially 4-1/2 inches deep.
illustrated breast roll, in tending to prevent such ?ber ac
Other breast rolls built according to the teachings of
cumulations within it, thus can be expected to provide
the invention respectively had outer diameters of 24 and
better paper formation than prior breast rolls in which
36‘ inches and outer diameters of the base portions of
such accumulations tend to occur. Due to the increased
16% and 27% inches. The depths of the cavities of
openness of the breast roll and greater facility of passing
these breast rolls were therefore respectively 3% and 4-1/8
water therethrough, it also can be expected to allow faster
inches. The corresponding cavity of a conventional breast .
paper web formation.
roll would, on the other hand, be less than 1% inches.
The illustrated breast roll due to its construction may be
The cavity depth has thus been increased by at least twice 1O
much easier cleaned of any ?bers remaining in the breast
in the improved breast roll of the invention.
roll as compared to prior rolls. In view of the fact that
in operation, the breast roll is mounted in a Four
drinier machine; and it, together with other rolls, sup
port an endless Fourdrinier wire. The wire has a hori
zontal pass between the breast roll and another of the
rolls, and a slurry of paper stock is deposited under pres
sure on the horizontal pass of the wire, just as it leaves
the top of the breast roll, such as by mechanism shown
in my prior Patent 2,756,649 previously referred to.
Due to the pressure applied to the slurry, some of the
water from the slurry flows between the convolutions of
vthe wire 2% and between the vanes 26 and between the
‘support rings 15 at the point of deposit of the slurry on
to the wire. The breast roll, being open, helps to remove
some of the water from the paper web being formed on
the wire and hastens its formation. The breast roll in its
rotation has its periphery move beyond and underneath
the horizontal pass of the wire and within the loop of the
wire, and the water that has been forced within the roll
at the point of deposit of the slurry on the wire is thrown
out by centrifugal force below the horizontal wire pass
and ultimately reaches a white water pond beneath the
the vanes 26 are straight, streams of water may be jetted
directly into the cavity of the breast roll between the vanes
for ?ushing ?bers out of the internal cavity. Also the
plates
may be removed from the ends of the roll, and
streams of water may be directed through the aligned
openings 22 and 13 for flushing out the roll.
The improved breast roll advantageously has an in
creased cavity depth so as to provide increased ventilation
and greater capacity for the roll to receive water for
better and increased speed of paper web formation and
less likelihood of ?ber accumulation.
The vanes 26 are
straight and may thus be economically cut from ?at metal
strips. The aligned holes 18 and 22, as well as the straight
vanes 26, permit streams of water to be jetted into the
internal cavity of the roll for cleaning purposes.
I wish it to be understood that the invention is not to be
limited to the speci?c constructions and arrangements
shown and described, except only insofar as the claims
may be so limited, as it will be understood to those skilled
in the art that changes may be made without departing
machine. The inclination of the vanes 26 at the angle
of 45 degrees with respect to radial assures that the water
from the principles of the invention.
What is claimed is:
that flows through the breast roll is not immediately
1. An open type breast roll for a paperrnaking machine
adapted to support a Fourdrinier wire and to receive
water draining from paper stock discharged onto the wire
thrown out back on to the web being formed on the wire,
but throw out is rather delayed and most of the water is
and roll and to retain some of the water for a portion of a
revolution and comprising means forming an inner core,
vanes 26 simply amount to resistance elements to restrict 40 a pair of end rings and a plurality of intermediate support
rings ?xed with respect to said core, and means providing
the white water throw out, imposing a drag surface along
an external perforated surface for the breast roll support
which ?ow of water is impeded and preventing the water
directed by the breast roll horizontally and away from the
horizontal pass of the Fourdrinier wire. The canted
from being thrown out of the breast roll by centrifugal
ed by said support rings and providing a peripheral cavity
force immediately. It is to be noted that the blades 26
are inclined in the direction of rotation of the roll indicated
by the arrow 31 in order to achieve this result and further
more that the blades 26 are straight rather than being
perforated surface, said last named means including a
plurality of vanes extending longitudinally of the roll
and canted in the direction of rotation of the roll, the
bent so as to provide an openness of the breast roll pe
improvement comprising said end rings and said support
about said core and between said core and said external
rings having a plurality of aligned openings therethrough
riphery that would otherwise not be present to allow the
50
white water from the stock slurry to enter the roll easier.
so that said cavity may be ?ushed out by directing ?uid
Insofar as the angle of 45 degrees for the blades is con
through said aligned openings.
cerned, obviously, if the vanes were perfectly radial, they
2. An open type breast roll for a papermaking machine
would offer no drag force to the water being thrown out;
adapted to support a Fourdrinier wire and to receive
and, on the other hand, if they were circumferential, they
water draining from paper stock discharged onto the wire
would retard the throw out completely; and the angle is
and roll and to retain some of the water for a portion of a
therefore chosen so as to be approximately midway be
revolution and comprising means forming an inner core,
tween these two limiting positions.
a pair of end rings ?xed with respect to said core and
Paper stock ?bers tend to accumulate within the roll
providing cylindrical zones of an exterior surface of the
inside of the vanes 26, and they restrict the free air ven (it) roll, a plurality of intermediate support rings ?xed with
tilation. between the vanes. As water plunges through the
respect to said core, a plurality of vanes supported by
vanes, the air within the cavity must be driven out; and,
said support rings to extend longitudinally of the roll and
if paper ?bers partially ?ll the cavity, the air is com
have
a cant in the direction of rotation of the roll, and a
pressed and prevents su?icient drainage and ?ow of water
through the roll to provide proper sheet formation on the 65 wire helically wound about said vanes, said vanes and
wire providing an external cylindrical perforated roll sur
surface of the Fourdrinier wire. The illustrated roll pro
face completing the breast roll exterior surface between
vides a cylindrical cavity extending between the outer
said zones and de?ning a cavity about said core and be
diameter of the wire 23 and the outer diameter of the base
tween said surface and the core, the improvement com
portions 16 which, as previously described, is substantially
deeper than the cavities in prior conventional breast rolls. 70 prising said end rings and said support rings having a
The illustrated breast roll thus has an openness of con
struction allowing greater flow of water and air through
the breast roll, and there is less likelihood that paper ?bers
will accumulate within the cavity. The fact that the
blades 26 are flat, rather than being bent, also contributes
plurality of aligned openings therethrough and said vanes
being formed of ?at strips for permitting a ?ushing out of
said cavity by directing flushing ?uid inwardly of said
vsurface or through said aligned openings.
3. An open type breast roll for a papermaking machine
3,066,731
5
adapted to support a Fourdrinier wire and to receive water
draining from paper stock discharged onto the Wire and
roll and to retain some of the water for a portion of a
revolution and comprising means forming an inner core,
a pair of end rings and a plurality of intermediate sup
port rings ?xed with respect to said core, and means
providing an external perforated surface for the breast
roll supported by said support rings and providing a
sions in the radial direction that the depth of said cavity is
more than three inches.
References Cited in the ?le of this patent
UNITED STATES PATENTS
811,660
Parker _______________ __ Feb. 6, 1906
peripheral cavity about said core and between said core
1,666,472
2,520,327
Seybold et al __________ __ Apr. 17, 1928
Nilson ______________ ._.. Aug. 29, 1950
and said external perforated surface, said last named
means including a plurality of vanes extending longi
tudinally of the roll and canted in the direction of rota
2,756,649
2,756,650
2,888,074
Lee _________________ __ July 31, 1956
Lee _________________ .. July 31, 1956
Hornbostel __________ __ May 26, 1959
tion of the roll, the improvement comprising said end
rings and said support rings having a plurality of aligned
openings therethrough so that said cavity may be ?ushed 15
out by directing ?uid through said aligned openings, and
said end rings and said support rings having such dimen
FOREIGN PATENTS
126,849
339,490
Germany ______________ __ Jan. 4, 1902
Switzerland __________ __ Aug. 31, 1959
518.708
Canada _____________ __ Nov. 22. 1955
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