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Патент USA US2408112

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Sept. 24,1946.
Filed Feb.‘ 14, 1940
3 Sheets-Sheet 1 v
Sept. 24, -l946.'
Filed Feb.’ 14,' 1940
31Sheets-She‘et' 2
W=WW ch62,“ '
Sept. 24, 1946. ’
, Filed, Feb. 141 1940
s sheets-sways
Patented Sept. 24, “1946
Robert J. Stewart, Baltimore, Md., assignor to
Crown Cork & Seal Company, Inc., Baltimore,
Md., a corporation of New York
‘Application February 14, 1940, Serial No. 318,964
8 Claims. (Cl. 259-8)
The present invention relates to apparatus for
mixing and ?lling beverages.
‘ In the production of beveragessuch as, soft‘.
drinks, consisting of carbonated water and syrup,
it has‘ been .usual to separately ?ow syrup and
carbonated water into a bottle or other container
and then bodily move the container in some
manner, either by hand or by machine, to. cause
provision of a method and apparatus of the type
referred to above which isv readily adapted to
handle various mixtures without the necessity
of flushing a large number of the elements of
the apparatus.
> I
A further object of the invention is the pro
' vision of an apparatus and method for mixing
liquids under varying pressures while maintain
ing the proper proportion of each liquid.
Other objects and advantages of the invention
subsequent bodily movement of the container has 10
will be apparent from the following speci?cation
been nec'essary'to obtain mixing because of the
and drawings, wherein:
factthat- the body of heavier syrup tends to re
Figure lis a diagrammatic view of the appa
main at the bottom of the bottle.
ratus of the present invention.
In order to avoid the necessity of the mixing
Figure 2 is a view diagrammatically showing
step discussed above, as well as the labor and 15
the two liquids‘to be properly mixed. - Such
apparatus required thereby, various methods‘ of ,
the wiring system used in the apparatus of Fig
mixing'the two liquids prior to the flowing of
Figure 3 is a detail section on the line 3-3 of
Figure 1.
. It has been iound'that by mixing the syrup
and water prior to flowing into a container, the 20. Figure 4 is a vertical sectional view through a
the same into a bottle have been proposed.
?lling can be accomplishedmore quietly since
the possibilities of foaming during ?lling are
mixingdevice included in the present invention.
reduced and a more uniform proportion of syrup
line 5-5 of Figure 4.
Figure 5 is a horizontal sectional view on the
Figure 6 is a vertical sectional view through a
'By‘one such process, syrup and plain water 25 settling tank included in the invention.
Figure 7 is a top view of a gas trap included in
have been mixed and then carbonated together.
and water is obtained.
into contact with the interior of the carbonator
the present invention.
Figure 8 is a side elevation, partly in section,
as well as' a substantial extent of the piping in
of the gas trap of Figure 7, and
Such an arrangement causes the syrup to come
cluded in the mixing apparatus.‘ Bottling con 30
cerns ordinarily handle several soft drinks, each
Figure 9 is a side elevation of a second form
of gas trap.
- Referring to Figure 1, the numeral l??desig
including a different syrup. Obviously, it is de
nates a carbonator for carbonating water deliv
sirable to keep the amount of surface or piping
ered thereto through the line H from a pump, l2
with which the syrup comes in'contact at a
minimum, since all such surface must be washed 35 operated by, a motor I3. The carbonator I0 is
of any well-known form including a liquid level
or ?ushed before the apparatus can be used
T 4
control'_for the motor I3, and the water‘ carbon
ated thereby will flow from the same through
Another objection to prior methods for mix
the pipe M to a gastrap 1-5, hereinafter de
mg carbonated beverages is that they have too‘,
greatly agitated the mixture. One particular 40 scribed in detail, and thence to a water pump l6.
cause‘of agitation has been the manner in which
Water pump I 6 is driven by a shaft 1 driven
through a belt l8 by a variable speed transmis
the ratios‘of the two liquids have been maintained.
An important object of the present invention
sion device l9, hereinafter fully described,
is to provide an improved method of ?lling liq
The speed transmission device I9 is driven
45 through a belt 20 from the shaft 2| of gear re
‘ Anotherlimp'ortant object of the present inven
duction unit 22 which is in turn driven through
a belt 23 by a motor 24.
tion' is to provide a method and apparatus where-.
to handle a different soft drink.
by liquids may be mixed and ?lled without undue _
agitation thereof.
f Another object of the invention is to provide
'a method and apparatus for mixing liquids which
are so designed that the proper ratios of the
liquids comprising the mixture will be accurately
" The driven vshaft 2l of the gear reduction unit
22 extends to a pump 26 to which the syrup sup
ply line 21. is connected through a gas trap 28.
Water ?ows from the water pump l6 through
a line 30 to a water meter 3! and syrup ?ows
from'the syrup pump 26 through a line 32. to a
syrup meter 33. The two meters 3| and 33 may
. f
.. .
,Still another object of the invention is the 55 be of any well-'knownltype, for’exaniple ofv the
construction disclosed in Hosmer Blum Patents
a tube ‘5| of small bore which extends down
Nos. 1,423,597, issued July 25, 1922, and. 1,977,424,
wardly through the center of tube 50. Thus the
water and the syrup will enter the mixing device
issued October 16, 1934.
However, each meter
47 from the same direction and in generally con
centric streams. The ?tting or tube 50 is formed
should be of such type that it will accurately
measure a liquid, regardless of changes in the
in the top wall 53 of a cylindrical chamber 54,
the body of' which is preferably'of glass. A ro
tating cylindrical e1ement'55 of substantially less
delivery pressure of the liquid.
The shafts’ 314‘ and 351 of meters 3| and 33}
which are driven by the meters toregister or in
dicate the flow of liquid therethrough are ex
tended from the respective meters and, as shown
in detail in Figure 3, the shaft 34 of one of the
meters, in the present instance, the water meter
3|, carries a slip clutch 36 through which it is
connected to a splined shaft 3-1. The shaftf?i
of the other meter carries a slip clutch=38~through1
which it drives a threaded shaft 38 which extends
co-axially with the shaft 31,, the adjacent, ends
length than the chamber 54 is ?xed upon a shaft
55~‘-extending down through the lower wall of the
chamber. Element '55 is of such diameter that a
relatively small space will be left between its
periphery and the inner surface of chamber 54
andtheouter surfaces of the cylinder are smooth
3 was to/min'imiza agitation. Exteriorly of the
chamber'E'Ir shaft56‘ is provided with a pulley 5'!
driven through‘ a» belt'58 by a motor 59.
of shafts 37 and 39 being substantially in abut
The lower wall 60 of chamber 54 includes an
ting relation. A collar or traveling nut “bridges
extension 6! surrounding the shaft 56 and
the two abutting shafts,.the end portion of nut 20 through which the mixed liquid will flow to a line
62. extendingtoa settling tank 6-3. .
41!; which engages splined; shaft. 3.‘! being keyed‘v
and. they other. end portion of the nut‘ being
The rotary element;55.:within the. mixing device
cylinder 54 is rotated‘ at a. relatively-‘high. speed
t'hr-ead'edlto engageshaft .39..
Collar. 49'. isengagedby ayoke flit carriedby a.
in order. that the incoming syrup andwaterwill
lever 42 extending to the speed changezdevice l9 25 be. thoroughly mixed. However;. since.v the. ele
ment 551s perfectly. smooth, its rotation will not;
and pivoted intermediate. its ends as indicated
cause‘. releasezofigas in the carbonated water be.
art-d3; At itsefari end the lever 42; engages‘. the
operating handle 4%. of. the speed: change. device.
ingmixed. That is‘, the, syrup andwater‘enter
ing: the chamber 54 in a generally concentric;
By this arrangement, if o-neof shafts 37s’. and 35
stream. will. move down; upon. the. upper. surface
is driven by. its- meter. to. rotate at‘. atdiiferent
of the drum 55 rotating in; the. same: direction.
Speed from the othervrthe traveling-unit: 4.5L will
as the liquids. are. swirling. Howeverbsincethe'
move in a direction further. along the faster ro
drum 55 is rotatingat amorerapidspeeditiwill
tating. shaft, thereby shifting. lever 4-2 with. a
cause‘. the relatively thin body of liquid: between
resulting actuationofi' the operatinghandle 4140f
speed-change device 191;. During such movement 35 'I its upper‘ surface. and‘; the undersurface. of the
the clutches-Strand 38 will notsl-ip, but only-upon
extreme movement of the nut as hereinafter- described.
The speed change device l9 may be. of any’
well}. known» type whereby gradual changes‘ of
speed-1 can:e be obtained. However, in'thepresent
embodiment it is: of. a type including a driving
and a driven pulley connected byabelt; one pul
Icy. comprising-v facing convex: discs urgedi to
gether on- their'common shaftlby a~coi1 spring.
Whenthe- distance offeither pulley axisfromr the
other is varied, the belt connecting the two~pulleys will be caused to ‘engage a different diameter
of the tapered faces-of the multidisc pulley'with
tharesultwthat a change‘ in speed of. the driven 50
pulley will be obtained.
top wal1..53 of thechamber'to swirlwithafaster
motionso that the two;liq.uids2'will. be furtherin
termingled. Then,.. when the. liquids. move; down
between thearelatively narrow space between the
side surface of the rotating._drum>55: andthe in
ner. wallof the. chamber: 58,. they will. be com
pletely mixed due. to'ithei opposing. frictional ac
tion exertediby. the stationary chamber’ wall. and
that of the rotating drum,
It is desirable: to provide a. check valve.“ in
the syrup inlet tube-5|. so that shouldthe sup-'
ply of syrup fail for'anyreason, water will not.
enter the. syrup line. 481v
Check1valve64- is so.
mountedland controlled thatit will notinterfere
with. the. ?ow. of syrup. under‘ pressure past the:
The. settling; chamber: 63;. is. illustrated in' de
tail. in Figure 6' and is. of. cylindricallform, the.
syrup and‘ water line 62 opening. to. the. lower
l Itwillbeobvious from the above that the speed
change‘ device" IE‘ will. thus control. the. speed of.‘
operation of. the water. pump. E61. $0 as-tohold
the supply of'water ?owing fromthe water-‘meter 55 wall 61: of. the: device; to a pipe?ilzrwhichextends.
a substantial. distance" up into the. chamber;. A
3511 at the proper proportion? with respect to the.
float 69 is pivotedin; the chamberJE3 in such .po-:
supply: of: syrup leaving thexsyrupmeter 33-; In:
sition that. the level of the- liquid within the set
mostisoft drinks; oneipart ofsyrup. is mixed with.
tling: chamber will normally be above theqinleti.
?ve: partsofrwater, but‘ the arrangement provided
hereinimayxbe varied:to maintaimwhatever ratio 69 extension 68 but will also be a substantial dis.-v
tancewbelow the upper end of the: cylinder. p"
is desired.
- The outletiiof' the; water meter 3| is connected.
Chamber 63*is provided with. anzoutlet 19 in its;
lower. wall.“ from: which. a line‘ ‘H extends to
by a pipesll‘?zt0therinlet 45": of. the mixing device
the-reservoir. 12. of: the. ?lling'ma'chin'e T3. The:
Q7: and the outlet’ ofv thesyrup meter 33 is con
nected by a line 43: to. a second. inlet 49.‘ of't'h'e; 65 float 69 is connected exteriorly of the settling‘
chamber. 63: withiia switch, preferably ‘a mercury
typeswitch, Withina? casing 15, thepurpose‘of‘
Referring to Figure 4, which. illustrates‘ the
switch15 being to control the'main driving motor
mixingdevice 47in detail, it will be. noted that
24 so that should the level of the liquid: in cham
thewater: inlet Minis. of relatively large'diameter
and; as best shown‘ in Figure 5, is arranged m berr63 rise to an extreme extent, the motor 24
will;.be stopped. The ?oat. rodéis' also connected
eccentrically-with respect. to a vertical tube. por
within casing 15 to. a valve. mechanism, not
tion 5trof theinlet, with the result that the water
shown, connected‘ to a pressureiv?uid line~l6 to
willhave- a‘ swirlingrmotion: as‘ it moves down
control flow through lines 16a and 76b‘ toaa..presthrough tube portion 50. Thesyrup line 48, of
smaller bore» than; water: line; 45 ,- . is, connected to 75. sure cylinder. 11 adjacent motor Z'kas-shown in
Figure _1. A piston rod 18 extending from cyl
inder-‘I‘I is secured to motor 24 and the motor is
mounted upon'slideways 19;
' The operation of the valve mechanism in casing
the lower chamber 85 to such an extent that the
level of the liquid'normally in‘upper chamber '86
dr'ops,'?oat 89 will drop to'open the'valve 92 so‘
as to permit the'escape of 'gas through port 93.
~ 'I5'is such that if the level of the liquid in cham
or Should the float 89 drop to a markedextent, a
ber 63 drops, the valve mechanism will be actu
switch in a casing '95 adjacent the upper'cham
ber 86 ‘will ‘be'operate'd Iby vrod '9I to an opened
position to open the circuit to the motor 24, there
ated to cause pressure ?ow through line'16a so
that this pressure will act upon one side of the
piston in cylinder ‘I’! to draw motor-24 closer to
the cylinder TI and also closer .to the gear reduc
by stopping the entire apparatus.
'The‘gas ‘trap' I5 provided upon the water pump
tion unit 22. Motor pulley 24a includes two ta
I6 is illustrated in Figure 9 and includes a lower
pered discs as described above in connection with‘
the speed-change device I9 and a decrease in the
chamber 85a and an upper chamber 86a. Car
bonated water enters the lower chamber‘ 85a
from line H through an inlet port 96 which is
distance between motor 24 and the gear ‘reduc
tion unit 22 will therefore cause unit 22-'to be 15 offset with respect to the axis of the lower cham
berso that the incoming water will be given a
driven at a higher speed so as to increase the
speed of the pumps I6 and 26 to supply more
liquid to settling chamber 63.
swirling motion. In order that the ,swirlingmo
tion will Ibe continued throughout the movement
of the water throughv the chamber, the outlet line
'Iflthe ?oat 69 in the settling chamber is raised
slightly by the liquid level, the’ valve mechanism‘ 20 91 which conducts the carbonated ‘water to the;
controlled thereby will cause pressure to 'act
through line 16b upon the opposite side of the
water pump I6 isalso offset with respect to the
axis of chamber 85. The gas trap I5 is otherwise
piston in clinder ‘I1, thereby moving piston rod
identical to the syrup gas trap 28.
18 to slide the motor 24 away from unit 22 so that
Figure 2 diagrammatically illustrates the man.
ner in which the various’ elements of the appara
tus are electrically connected so that the‘ motor
L’iwhich operates the water pump I6 and syrupv
the speed of- the pumps ‘I6 and 26 will beide
creased. As stated above, if the float 69 rises too
far; the circuit to the motor 24 will be closed
untilthe ?oat again drops somewhat.
‘ .
The provision of the settling chamber 63 en
ables the liquid to move to the reservoir 12 of
the ?lling machine in a quieter condition than ’
would be the case if the reservoir received the
liquid direct from the mixing device 46.
_ _ '
- In order thatthe ?uid in ?lling machine reser
voir 12, settling tank 63 and carbonator II) will .
be under the same pressure,'the top portions of
these three elements are connected by pressure
equalizing lines 80 as indicated in Figure 1. This
willv prevent a pressure lock at any point in the
' pump 26 will be stopped in the event that the ap
paratus is producing too great a quantity of mixed
beverage, or if the supply of water or syrup fails.
Referring to Figure 2, it will be noted that a
main I291 is connected to one connection of the
motor 24 while another main I2I is connected to
the ?oat operated control switch within the cas
ing 15 of the settling chamber ‘63., Fromthis
latter switch a series lead I22 extends to the'float
control switch associated'with the gas trap_l5 of
the water pump and a series lead I23 extends
from this switch to the switch associated with the
gas-trap 28 of the syrup pump. A lead I 240011
nects the last-mentioned switch with a normally
closed trip switch I25 arranged at one side of I
Settling chamber 63‘ is of such capacity that
liquid will be held in the same for approximately
the path of movement of the lever I42. A second
ten minutes. That is, in normal operation, the
normally closed trip switch I26 is positioned at
chamber will be ?lled, and the pumps I6 and 26
will then stop until the level in'chamber 63 falls. as M the other side of the path of movement of lever
42. The provision of these two trip switches in
During this settling period any ?ne bubbles in the
sures that if the speed of movement of either of
mixture willeither rise out of the mixture or
> the meters 3I and 33 either drops or increases
will go into solution. This action will be ‘aided
to a marked extent, the motor 24 will be stopped
by reason of the fact that the pressure in cham
byreason of the fact that the lever 42 will actuate
ber 63 is the same as‘in the carbonator ID, by
one of the two trip switches to opened position.
reason of the connecting lines 80. Also, the
The slip clutches 36 and 36 illustrated in Figure
settling chamber is insulated to maintain the mix
37 insure that the shafts 31 and 39 which carry
ture at the proper cool temperature. It is de
the traveling nut 40 will slip with respect to the
sirable to provide such insulation at other parts of
meter shafts 34 and 35 when the lever 42 con
the ‘apparatus as is necessary to maintain the liq
tacts with a trip switch and further swinging
uldsv at proper temperature throughout travel
movement of the lever is prevented. This ar
through the various elements of the system.
The gas trap 28 illustrated in Figure 1 as asso- ' rangement will prevent damage to the meters.
ciated with the syrup- pump 26 is shown in de
tail in Figures 7 and 8 and comprisesa lower
chamber 85 and an upper chamber 86. The
syrup inlet line 2''! enters the upper portion of
the chamber 85 at a point offset with respect to
the axis of the chamber so that the syrup will
have a, swirling motion as it moves downwardly
through thatchamber, to the line 81 which ex
tends to the inlet of pump 26; The swirling mo
tion of the liquid will allow any entrained gases
to collect at the center and rise through-the short
tube 88 extending from the central portion of the
top of chamber 85 to the upper chamber 66.,
Chamber 86 has a float 89 therein including an
arm 90 ?xed to a rod 91 journaled in the cham
The two trip switches are connected in series
rby a lead I2‘! and a series lead I28 extends from
trip switch I26 to the motor 66 which operates
the mixing device. 'From'mo-tor '59 a lead I29
extends to the other side of the motor 24.
It will be observed from the above wiring dia-'
gram'that motor 24 will be stopped if any of the
switches in series circuit therewith is opened and
that the mixing device motor 59 will be stopped
at the same time.
7 r
» It will be observed that the various controls
I and speed-change arrangements included in the
present apparatus will insure that so long as the
apparatus is operating, a mixture of the proper
proportions of the constituent liquids will be pro-'
duced and that if conditions become‘ such that
ber. Arm. 96 carries a ‘valve 92 normally adapted
tov close an. escape port 93.. If gas or. air entersv v75 the apparatus cannot produce the properimix
ture, voperation will immediately terminate. This
is,‘ of course, highly important in the production
of soft drinks‘ because the failure to maintain
the exactly proper ratios will not be apparent
from a mere viewing of the bottled product and it
is not practicable to test the mixture from time
to time. Therefore, unless a mixing apparatus
is fully controlled as described above, a large
number of bottles might (be ?lled with a mixture
‘l. A device for‘mixing liquids comprising a
chamber provided with a cylindrical bore includ-v
ing an uninterrupted cylindrical surface, inlets
for liquid adjacent one end of the chambergan
outlet for liquid adjacent the opposite end of the
chamber, a cylinder including a smooth periphery
rotatable in the chamber, means to rotate the
cylinder, the cylinder being of less'length than
of improperly proportioned constituent liquids, 10 the chamber and positioned closely adjacent the
inlet end thereof and being oi such diameter with
involving a substantial waste in both ingredients
respect to the inner diameter of the chamber as
and labor.
to provide an area of limited radius between the
' The operation of the apparatus and method
cylinder and chamber walls in which liquids may
isv as follows:
The water flowed to the carbonator I0 is pref 15 be swirled together to mix, the radius of the area
being so limited as to preclude foaming.
erably ?ltered and de-aerated in accordance with
2. A device for mixing liquids comprising a
the usual practice and is cooled to a temperature
cylindrical chamber, a cylinder rotatable in the
just above freezing. The syrup flowed to the ap
chamber and spaced from ‘each end thereof,
paratus throughout line 21 is also cooled to the
proper temperature to cause it to properly mix 20 means to rotate the cylinder, and inlets for the
liquids to be mixed at one end of the chamber,
and so that it will not raise the water tempera
at least one of the inlets being arranged to de
ture too markedly. After carbonation the water
liver liquid to the chamber at a point o?set with
?ows to the gas trap 15 and is then forced by
respect to the axis of the rotatable cylinder.
the pump IE to the meter 3 l . The incoming syrup
3. A device for mixing liquids comprising a
moves through the gas trap 28 and is then deliv 25
cylindrical chamber, a cylinder rotatable in the
ered by the pump 26 to the syrup meter 33. The
chamber and spaced from each end thereof, the
meters 3| and 33 will deliver the proper propor
cylinder being provided with a smooth periphery,
tions of syrup and Water, usually at the rate of
means to rotate the cylinder, and inlets for liquids
one ounce of syrup to five ounces of water, to the
mixing device 41 where the two ingredients will 30 at one end of the chamber, at least one of the
‘ inlets being arranged to deliver liquid to the
be thoroughly mixed without agitation and will
chamber at a point offset with respect to the
then flow through the line 62 to the settling
axis of the rotatable cylinder.
chamber 63 from which the mixture will move
4. In an apparatus for mixing liquids, a plu
through line 'H to the usual reservoir 12 of the
35 rality of sources of liquids to be mixed, a liquid
?lling chamber.
mixing means, a plurality of liquid flow lines,
Since the entire system will be kept at the
each ?ow line extending between one of said
water carbonating pressure, the mixture in the
sources and said liquid mixing means, means in
settling tank and in the ?lling machine reservoir
will be under an excessive gas pressure so as to
each line to move a liquid therethrough, a measur
a point in advance of the ?lling machine reser
voir 12 will permit the ?ne bubbles which may
possibly be formed in the metering and mixing
operations to pass either into solution or out of
the liquid, insuring that the liquid can subse
quently be quietly ?owed into the bottles by the
rality of sources of liquids to be mixed, a liquid
mixing means, a plurality of liquid flow ‘lines,
each flow line extending between one of said
sources and said liquid mixing means, means in
increase its stability and permit ?lling at a 40 ing means in each line, and means controlled by
said measuring means to hold all of said liquid
greater range of temperatures. This renders the
moving means at such relative speeds as to main
system applicable to numerous types of ?lling
tain a predetermined ratio of flow from said
measuring means.
The provision of the settling chamber 63 at
?lling machine.
The inclusion in the system of a positively act
ing mixing device will insure that the syrup will
be uniformly dispersed throughout the carbon
ated Water. However, it will be noted, as stated
in detail above, that the mixing device 41' disclosed
herein is of such type that the mixture will not
vbe unduly agitated. The method included in the
present invention of controlling the mixture by
changing relative pump speed also contributes to
smoother operation and decreases churning and
agitation of the liquids moving through the sys
Althoughv the present method and apparatus
have been generally described as adapted to
handle the mixing of carbonated water and syrup,
it will be appreciated that the invention is ap
plicable to the mixing of numerous other liquids,
particularly those which must be mixed under 70
' 5. In an apparatus for mixing liquids, a plu
each line to move a liquid therethrough, a
measuring means in each line, means controlled
by said measuring means to hold all of said liquid
moving means at such relative speeds as to main
tain a predetermined ratio of ?ow from said
measuring means, a settling tank to receive the
mixed liquid from said mixing means, and means
associated with said settling tank to control the
operation of said liquid moving means.
6. In a liquid mixing apparatus, a casing pro
vided with a vertically extending cylindrical bore
of uniform diameter, an inlet tube for one liquid
arranged concentric with the axis of the casing
bore and opening to the upper end of the casing
bore, a second inlet tube for a second liquid sur
rounding and arranged concentrically with re
spect to the ?rst-mentioned tube, means to flow
liquid tangentially into said second tube whereby
the second liquid will move into and downwardly
in said second tube and thence into the casing
bore with a swirling motion, a rotary drum
mounted concentrically in the bore of said casing,
The terminology used in the speci?cation is for
said drum being of such diameter that only a
small space will be provided between the drum
the purpose of description and not of limitation,
periphery and the casing bore, the upper end of
the scope of the invention being set forth in the
75 said drum being positioned adjacent said concen
pressure or which contain gas in solution.
tric inlets so that the incoming liquids will move
down upon the top of the drum, and means to
rotate said drum with a movement faster than,’
mixing means, a plurality of liquid flow lines,
oughly intermingled during movement down
wardly between said drum and casing bore.
by said measuring means to hold all of said liquid
tance from the lower end of ‘the casing’ bore.
speed of operation of said liquid moving means.
each ?ow line extending between one of said
sources and said liquid mixing means, means in
each line to move a liquid therethrough, a
the swirling motion of the liquid entering through
said second tube so that the liquids will be thor 5 measuring means in each line, means controlled
moving means at such relative speeds as to- main
tain a predetermined ratio of flow from said
'7' A liquid mixing apparatus of the character
measuring means, a settling tank to receive the
described in claim 6 ‘wherein the rotary drum is
of substantially less length than the casing bore 10 mixed-liquid from said mixing means, and'means
associated with said settling tank to control the
and has its lower endspaceda substantial dis- '
8. In an apparatus for mixing liquids, a plu
rality of sour es of liquids to be mixed, a liquid
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