close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2129789

код для вставки
Sept. 13, 1938.
c. R. SEAB'ORNE
2,129,789
BEATER FOR PAPER STOCK
Filed April 5, ‘1936
2 Sheets-Sheet l
r
(yaw-[e5]? ?eagorne
Sept 13, 1938.
' c. R. SEABORNE
2,129,789
BEATER FOR PAPER STOCK
Filed April 3, 1936
@Z
2. Sheets-Sheet 2
Patented Sept. 13, 1938
'
2,129,789
i1
UNITED STATES PATENT OFFICE
. BEATER $131221: STOCK
Applicatiorliozl'ilii
My invention relates to beaters for paper stock
and is concerned primarily with the improvement
of beaters of the general type disclosed in my
)No. ‘12,509
with a plurality of downwardly projecting beater
knives 9 at the bottom surface thereof.
The bottom of the bowl is normally closed by
Patent No. 1,691,308, which was issued on Novem5 her 13, 1928.
a rotatable disk or plate Ii having a plurality of
beater knives i2 for cooperating with the beater 5
The principal objects of the present invention
are to provide a beater of this general type which
shall be capable of sustained operation without
clogging of the beater knives over long periods
10 of time; to provide a beater of this type wherein
the circulation of pulp shall be effected with a
knives 9 of the bowl operatively supported upon
the upper surface thereof. The plate ‘I I is sup
ported for rotatable movement beneath the bowl
I by means of a vertically extending shaft i3
and a thrust bearing H, a suitable hub l5 cast in- 10
tegrally with the plate ii being keyed to the shaft
greater positiveness and at a more rapid rate » IS.
than has been heretofore accomplished; to improve generally beaters of this type; and to pro15 vide a simple means readily attachable to existing beaters for preventing clogging thereof during use. Other objects and uses of the invention
will be made apparent by reference to the follow-
The plate ii is provided with at least one
impeller blade l6 cast integrally with the upper
surface thereof for aiding in effecting the circu
lation of the pulp through the beater knives. If 15
desired, peripherally arranged vanes as are indi
cated at I6’ may be used for further increasing
the speed and effectiveness of the pulp circula
ing speci?cation and the drawings, wherein-—
tion.
I
Fig. 1 is a sectional view, partially in elevaDuring operation of the beater, the pulp or 20
tion, of a beater embodying the features of my other stock, the normal level of which is indi
invention. The view is taken on the general line cated by the dot and dash line H, is circulated
l--l of Fig. 2;
within the bowl 8 and the outer closure i in the
Fig. 2 is a bottom plan view of the beater il- 'manner indicated by the arrows. In order to
25 lustrated in Fig. 1;
aid in securing vertical movement of the pulp 25
Fig. 3 is an inverted, detail plan view showing within the bowl and hence more positive circu
the bottom of the bowl and the beater knives lation of the pulp between the cooperating sets
20
positioned thereon;
of beater knives, I have provided a feeder screw '
Fig.4 is afragmentary view'showing the motor
30 operated mechanism for raising and lowering the
beater bowl;
Fig. 5 is a perspective view showing one of
the scraper knives used in accomplishing the
i8 which is supportedupon and keyed to the
shaft l3. This feeder screw is preferably of hol- 3o
low, cast metallic construction as illustrated in
the drawings, but other arrangements are, of
course, satisfactory.
‘
,
objects of my invention, and
35
Figs. 6 and '7 are fragmentary views illustrating the manner in which the scraper knives
shown in detail in Fig. 5 are mounted upon the
beater structure.
I
Referring to the drawings, my improved beater
40 includes a generally cylindrically shaped outer
For rotating the plate II which closes the bot
tom of the bowl 8, and the feeder screw I8, I 35
prefer to utilize an electric motor indicated at l9,
in conjunction with a suitable speed changing
mechanism indicated at 20, this mechanism be
ing mechanically coupled with the upper end of
the shaft by any suitable means. The motor and 40
tank or closure I which is supported upon a suitable frame 2, which may comprise welded structural sections, as is illustrated in Figs. 1 and 2.
The bottom of the outer closure i is permanently
45 closed by means such as the metallic plate 3,
and the top is likewise closed by a similar plate
I having a suitable opening 5 through which
pulp stock may be introduced into the beater.
the speed changing mechanism are supported
upon a ‘suitable frame on superstructure 38 at the
top of the beater.
For most satisfactory‘operation of a heater of
this type, it is desirable that the cooperating sets 45
of beater knives shall be vertically adjustable
with respect to each other. In the device illus
trated in the drawings this adjustment is made
The beater structure also includes a pressure op50 erated dump valve 6 for withdrawing the pulp at
the conclusion of the beating operation and a
possible by the provision of a vertically adjusta
ble support means for the bowl 8. This support 5”
means comprises three symmetrically positioned
water inlet pipe ‘I.
mechanisms 2i, each of which includes a thrust
_
,
An annularly shaped, cast metallic bowl 8
which is open at its top and bottom is positioned
66 within the outer tank or closure i and isprovided
rod 24 adapted to be a?ixed to the bottom of the
bowl 8, and an adjustable lift screw 22 for raising
and lowering the thrust rod. The lift screws 22 55
2
2,129,789
are each actuated by a sprocket wheel 2;, and
in order that vertical adjustment of the bowl
can be most conveniently carried out, the
sprocket wheels 23 are interconnected by a chain
25 which also engages the sprocket drive wheel
26 of the motor operated bowl raising and lower
ing mechanism 21, illustrated particularly in
Figs. 1 and 4. The motor drive of this mecha
nism 21 preferably ,includes a speed reducing
gearing indicated at 28, this arrangement per
mitting very close vertical adjustment of the co
operating sets of beater knives 9 and I2. The
bowl supporting mechanism 2| includes yieldable'
means intermediate the thrust rods 24 and the
15 lift screws 22 which permits momentary upward
, movement of the bowl to prevent damage to the
beater knives in the event that some’ foreign
object should get into the beater.
In the operation of beaters of the type disclosed
20 in my earlier Patent No. 1,691,308, some di?lculty
is at times experienced with clogging of the
beater knives during the beating operation, par
ticularly when utilizing certain types of pulp
stock.
This clogging occurs as the stock ?ows,
.25 outwardly through the knives, some of it having
a tendency to staple or jackknife in the space
between the stationary and rotating blades.
While this clogging in no sense renders the beater
» inoperative, it substantially impairs its efliciency,
30 particularly when a feeder screw is utilized, the
clogging then preventing the full realization of
the increased speed of circulation possible with
such a structure.
-
_
I have found that this clogging can be com
36 pletely obviated by the provision of one or more
of the scraper knives 30, illustrated particularly
in Figs. 1, 2, 5, and 7. Preferably a plurality of
these knives 30 are supported at spaced intervals
upon the inner surface of the bowl 8, the leading
40 edge of the knife portion 3| thereof pointing in
a direction opposite to the normal direction of
the rotation of the plate II. The scraper knives
30 are positioned immediately in front of the
cooperating beater knives 9 and I2, the resulting
45 scraping action, particularly when aided by the
shearing e?ect of the vane It, produces a sub
stantially continuous cleaning of the space im
mediately in front of the cooperating beater
knives 9 and I2.
50-
.
The scraper knives 30 are preferably adjustable
to at least a slight degree in order that the most
eiiicient scraping action may be effected. Ad
justment of the speci?c form of scraper knives
illustrated in the drawings is made possible
55 through the provision of slotted openings 32 for
the shanks of the cap screws 33 utilized in
affixing the scraper knives to the bowl proper.
From the foregoing it will be seen that I have
provided a new and improved form of beater
60 which possesses numerous advantages over the
constructions heretofore known to the art. My
improved beater includes means for continuously
scraping accumulations of pulp from in front of
the cooperating beater knives and thus makes
65 possible a substantial increase in the speed of
operation of the beater. Further, I have shown
how this continuous scraping action may be uti
ticular structure and arrangements of my in
vention without departing from the principles
which I have disclosed above, and it is my in
tentlon, therefore, that the accompanying claims
shall be construed as broadly as is possible con
sistent with the state of the art.
I claim the following as my invention:
1. A machine of the character described com
prising a bowl open at its top and bottom and
having its bottom provided with beater knives, 10
a rotatable plate extending beneath and closing
the bottom of said bowl, said plate having beater
knives for cooperating with the beater knives of
the bowl, and at least one scraper knife supported
upon said bowl adjacent saidv rotary plate for 15
preventing clogging of said knives during use
of said machine.
2. A machine of the character described com
prising a bowl open at its top and bottom and
having its bottom provided with a plurality of 20
beater knives, the cutting edges of which extend
in a generally horizontal direction, a rotatable
plate extending beneath and closing the bottom
of said bowl, said plate having a plurality of
beater knives, the cutting edges of which likewise 25
extend in a generally horizontal direction for
cooperating with the knives of the bowl, and
means for preventing clogging of said knives dur’ -
ing the use of said machine comprising at least
one vgenerally vertical scraper knife supported 30
upon said bowl adjacent said cooperating beater
knives.
'
3. A machine of the character described com
prising a bowl open at its top and bottom and
having its bottom provided with beater knives, a 35
rotatable plate extending beneath and closing the
bottom of said bowl, said plate having beater
knives for cooperating with the beater knives of
the bowl, and means for preventing the stock
from stapling or jackkni?ng as it ?ows through 40
and between said cooperating knives, said means
comprising a plurality of scrapers adjustably
mounted upon said bowl.
4. A machine of the character described com
prising a bowl openat its top and bottom and
having its bottom provided with beater knives, a
rotatable plate extending beneath and. closing
the bottom of said bowl, said plate having knives
for cooperating with the knives of said bowl, a
feeder screw disposed within said bowl for cir 50
culating the pulp in a vertical direction therein,
means for rotating said feeder means and said
plate during the operation of said machine, and
means for preventing clogging of said heater
knives during the operation of said machine, said 55
last mentioned means comprising at least one
stationary scraper knife supported inside said
bowl adjacent said cooperating beater knives.
.‘5. A machine of the character described com
prising a bowl open at its top and bottom and 60
having its bottom provided with beater knives, a
rotatable plate extending beneath and closing the
bottom of said bowl, said plate having beater
knives for cooperating with the beater knives of
said bowl, a feeder screw arranged for rotation 65
within said bowl for circulating the pulp in a ver
tical direction within said bowl, a receptacle for
lized in conjunction with high speed feeder pulp surrounding said knives communicating with
screws or the like for accomplishing very much
more rapid beating of the pulp than has been
heretofore possible. I have also disclosed a sim
ple type of scraper knife which may be con
venientlnapplied to existing beater structures for
improvirig the operation thereof.
76 Various modifications may be made in the par
the top of said bowl, means for simultaneously
rotating said rotatable plate and said feeder
screw, and means for preventing clogging of said
heater knives comprising a plurality of spaced sta
tionary scraper knives adjustably supported upon
the inner surface of said bowl adjacent said co
operating beater knives.
75
3
2,199,789
6. A machine of the character described, com
said cooperating beater knives, said impeller blade
prising a bowl ‘open at its top and bottom and‘ and said scraper knife cooperating to aid in pre
having its bottom provided with beater knives, a venting clogging of said knives during use of said
:_
l
plate extending beneath and closing the bottom machine.
9. A machine of the character described, com
of said bowl, said plate being provided with beater
knivesfor cooperating with the ‘beater knives of
prising a bowl open at its top and bottom and
said bowl, means for imparting rotation to one
having its bottom provided with a set of beater
knives, a rotatable shaft located centrally within
said bowl, a feeder screw supported upon said
shaft within ‘said bowl, a plate provided with a 10
set of beater knives for cooperating with the beat
er knives of said bowl also supported on said
set of said knives and the part carrying the same,
and means comprising at least one scraper knife
10 supported upon said bowl adjacent the area of
entry of the stock between said cooperating beat‘
erknives for preventing the clogging thereof dur
ing use of said machine.
-7. A machine of the character described, com
15 prising a bowl open at its top and bottom and
having its bottom provided with a set of beater
knives, a plate extending beneath and closing
thev bottom of said bowl, said plate being pro
vided with a second set of beater knives for co
20 operating with the beater knives of said bowl,
means for imparting rotation to one set of beater
knives and the part carrying the same, a feeder
screw positioned within said bowl for forcing the
stock to circulate in a vertical direction, and at
least one scraper knife supported upon said bowl
adjacent said cooperating beater knives for pre
venting the clogging thereof during use of said
shaft, said plate extending beneath and closing
the bottom of said bowl, means for rotating said
shaft, and at least one, scraper knife supported 15
upon said bowl adjacent said cooperating beater
knives for preventing the clogging thereof dur
ing the use of said machine.
10.‘ A machine of the character described, com
prising a tank, a bowl disposed within said tank 20
so as to be spaced some distance from the walls
thereof, said bowl being open at its top and bot
tom and having its bottom provided with beater
knives, a rotatable plate extending beneath and
closing the bottom of said bowl, said plate being 25'
provided with beater knives for cooperating with
the knives of said bowl and having upon its up
per surface at least one impeller blade, a feeder
machine.
8. A machine of the‘ character described, com vscrew located within said bowl substantially co
80 prising a bowl open at its top and bottom and axially with the axis of rotation of said plate, so,
having its bottom provided with beater knives, a
rotatable plate extending beneath and closing the
bottom of said bowl, said Plate being provided
with beater knives for cooperating with the beat
35 er knives of said bowl and with at least one im
peller blade‘ arranged to move within said bowl,
means for rotating said plate, and at least one
, , >2
supported upon said bowl adjacent
means for rotating said plate and said feeder
screw, and at least one scraper knife mounted on
said bowl adjacent the area of entry of the stock
between said cooperating beater knives, said im
peller blade and said scraper knife cooperating
to aid in preventing the clogging of said heater
knives
w‘ :w
the use of said machine.
Документ
Категория
Без категории
Просмотров
0
Размер файла
538 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа