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Патент USA US3035427

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May 22, 1962
o. G. HQYER
3,035,417
METHOD AND APPARATUS FOR FILLING PRE-COOLED
MATERIAL INTO A ROW OF REFRIGERATION CELLS
Filed Aug. 3, 1959
3 Sheets-Sheet 1
INVENTOR
OLUF G-UDMUAID HZYER
ATTORNEYS
May 22, 1962
3,035,41 7
0. G. HQYER
METHOD AND APPARATUS FOR FILLING PRE-COOLED
MATERIAL INTO A ROW OF REFRIGERATION CELLS
Filed Aug. 5, 1959
3 Sheets-Sheet 2
INVENTOR
OLU F GUDMU/VD HHYER
BY WMMMMMM
ATTORNEY;
May 22, 1962
‘
o, G, HQYER
3,035,417
METHOD AND APPARATUS FOR FILLING PRE-COOLED
MATERIAL INTO A ROW OF REFRIGERATION vCELLS
Filed Aug. 5, 1959
3 Sheets-Sheet 3
him 1''“! HI MM
53
INVENTOR
OLU F GUOMUND HEYER
BY WM,
ATTORNEY5
Unite
tei t
f.
1
3,035,417
Patented May 22, 1962
2
the said duct preferably terminates in the vicinity of the
3,035,417
end of a reservoir for the pumps, said reservoir extending
METHOD AND APPARATUS FOR FILLING PRE
COOLED MATERIAL INTO A ROW OF REFRIG
ERATION CELLS
‘along the row of pumps. When the cold material in this
way is supplied to the reservoir at the outermost pumps,
which, as ‘experience proves, are most subjected to being
heated from the surroundings, the possibility of maintain
ing a constant temperature in the material supplied to the
refrigeration cells by the pumps is improved.
Oluf Gudmund H¢yer, 8 Finlandsgade, Aarhus, Denmark
Filed Aug. 3, 1959, Ser. No. 831,413
10 Claims. (Cl. 62-65)
The invention relates to a method for operating a ?ll
In a simple embodiment of the invention at least one
ing machine of the type having a row of pumps placed 10 cooling chamber is integral with a common casing for
side by side for the simultaneous delivery of pre-cooled,
the pumps.
liquid or plastic material into a row of refrigeration cells,
particularly in a rotary ic'ecream brick refrigerator.
mon shafts, the pump shafts may advantageously extend
into the cooling chambers. The cooling of the pump
When the pumps are gear pumps with com
In automatically operating ice-cream brick refrigera
shafts obtained hereby contributes additionally to the
tors, where after the ?lling of the refrigeration cells a 15 maintenance of constant temperature conditions and
stick is mechanically inserted in the partly frozen mate
thereby of a constant consistency of the material sup
rial in each cell and where this stick, after the ?nished
plied by the individual pumps.
freezing of the material and a temporary thawing of the
The invention will in the following be further explained
outermost layer of the latter, is used for the mechani
with reference to the accompanying diagrammatical draw
cal removal of the ?nished ice-cream bricks, it is of great 20 ings in which
importance that the material when ?lled into the cells
FIG. 1 shows a vertical section through part of a ?ll
has a very de?nite consistency. If due to a too strong
ing machine with gear pumps according to the invention,
pro-freezing the material is too hard, the sticks cannot be
FIG. 2 a section on line -II—II in FIG. 1,
inserted into it, and hereby the ?nished ice-cream brick
FIG. 3 a section on line III—III in FIG. 1, and
becomes defective and cannot be removed from the ma
25
chine. If, on other other hand, the material is too soft,
i.e. too slightly frozen, there is the risk that the stick in
serted will change its position in the material before the
latter in the refrigeration has solidi?ed sufficiently for
retaining the stick. An ice-cream brick, the stick of
which thus has ‘a wrong position in relation to the grippers
of the picking-up apparatus, cannot either be removed
FIG. 4 a partly vertical section through a modi?ed
embodiment of a ?lling machine according to the inven
tion, where the pumps are constituted by piston pumps.
‘FIGS. 1-3 show a unit for a ?lling machine for a
rotary ice-cream brick refrigerator which e.g. may be of
the type described in U.S. patent speci?cation No. 2,791,
890. The refrigerator comprises an annular table 1 in
which a number of mould sectors are secured, each of
mechanically and will therefore necessitate the presence
which contains a number of refrigeration cells 2 placed
of an operator who can manually remove the ice-cream '
in radial rows and in concentric rings in relation to the
table 1. The table 1 is rotatable about a vertical axis
brick from the refrigeration cell.
tively narrow limits, and in the known refrigerators of
through the centre thereof, and during the operation of
the refrigerator the table is rotated stepwise corresponding
to the angular distance between two successive rows of
the type referred to, where a row of cells are ?lled simul
refrigeration cells 2, ‘whereby the cells successively pass
It is therefore necessary to keep the consistency of
the material ?lled into the refrigeration cells within rela
the ?lling machine shown which ?lls a predetermined
amount of material into each cell, a stick ?tting device,
which mechanically inserts sticks into the material in
the cells, and a picking-up apparatus for removing the
cannot be removed mechanically.
ready~frozen ice-cream bricks. Under the rotatable table
It is an object of the invention to avoid these difficulties,
and according to the invention this is achieved by cooled 45 1 an annular tank 3 is provided which contains a freezing
bath and a thawing bath, through which the refrigeration
material, before being supplied to the refrigeration cells,
cells 2 pass during the notation of the table. The tank
being used for cooling the ends of the row of pumps.
3 is surrounded by a heat-insulating wall 4 secured to
It has proved that by a cooling thus provided of the
the frame of the refrigerator, which frame is designated
outermost pumps in the row and thereby of the material
in the latter it is possible to keep the temperature and 50 by 5.
The ?lling machine is provided with a stationary part,
thereby the consistency of the material ?lled into each
not shown, which is secured to the frame 5 of the refrig
of the refrigeration cells considerably more constant than
taneously, it has proved di?’icult to meet this demand
for all the pumps in the row, so that there may under cer
tain conditions occur a waste of ice-cream bricks, which
erator and which serves as a guide for the vertically mov
has hitherto been the case, so that the waste percentage is
able ?lling unit which is shown in the drawings. ‘By
creased. Particularly inmmachines for the production of 55 means of a suitable mechanism the ?lling unit is moved.
reduced and the production rate of the machine in
multi-colour ice-cream bricks the invention also remedies
the drawback that, due to a too high temperature of the
once downwards and upwards every time the rotatable
materials, the differently coloured materials may partly
merge in the cells ?lled by the outermost pumps which
upward motion of the ?lling unit the pumps of the latter
characteristic feature of this machine is that externally
The ?lling unit has‘a gear box 6, FIG. 2,.to which an
table is stationary during its stepwise motion. During the
are actuated by means not shown, so that the refrigera
might lead to a less attractive appearance of the ice-cream 60 tion cells 2 are ?lled with material from the bottom, and
before the ?lling unit once more moves downwards the
bricks.
table it is rotated so that another row of. refrigeration
The invention furthermore relates to a ?lling machine
cells 2 is located under the ?lling unit.
for carrying out the method described above, and the
at either end of the row of pumps a cooling chamber is 65 intermediate part 7 is secured which carries a horizontal
ly mounted pump casing 8. The pump, casing extends
provided which, is open towards the end wall of the casing
of the outermost pump in the row,‘ said chamber being
provided with an inlet opening and an outlet opening,
the latter opening communication through a duct with
the pumps. The said duct may extend inside a com
mon casing for the pumps or may consist of a pipe ex
tending outside the pumps. According to the invention
across a radial row of refrigerationcells 2 and con
tains a number of identical gear pumps, three for each
refrigeration cell in the row.
70
Each gear pump consists of two pump gear wheels 9
and 1t}, and spacers 11 ?ll out the interspaces in the
pump casing between the gear pumps. All the pump
3,035,417
3
4
gear wheels 9 are mounted on a common through shaft
at the opposite end of the pump case is arranged in a
separate end part 33 bolted to, the pump casing 8. The
supply of material to the cooling chambers 32 is ef
12 and are driven by the latter by means of a key 13.
The pump gear wheels 10 are mounted so as to be freely
rotatable on a through shaft 14. At their ends adjacent
the stationary part of the ?lling machine the shafts 12
and 14 are journalled in the intermediate part 7, and the
shaft 12 is provided with a projecting end which through
a claw clutch 15 is connected to a shaft 16 which from
fected through vertical channels 34 provided in the left
end of the pump casing 8 and in the end part 33, re
spectively. The channels 34 terminate in threaded
branches 35 corresponding to the threaded branches 3.1,
to which supply tubes, not shown, for the particular
kind of material are connected during the operation of
the gear box 6 projects into the intermediate part 7. To
the end of the shaft 16 located opposite tothe claw 10 the machine.
From each of the two cooling chambers 32 there leads
clutch a gear wheel 17, FIG. 2, is secured which meshes
a horizontal outlet channel 36 provided in the pump
with a gear wheel, not shown, which is in driving con
casing 8 and the end part "33, respectively, each channel
nection with the input shaft of the ?lling machine which
36 terminating in a threaded branch 37, to which a U
is driven from the same motor as the main shaft of the
refrigerator. In the driving connection there is pro 15 bent tube 38 is secured by means of a union nut 39.
The other end of each of the two U-tubes 38 is by means
vided a releasable coupling which is actuated in time
of a corresponding union nut 40 secured to a horizontal
with the motions of the refrigerator and the ?lling ma
branch 41 on the top part ‘23, the bore of said branch
chine, so that the gear pumps supply material to the re
communicating with the chamber 24 in the top part.
frigeration cells only during the part of the working
During the operation of the ?lling machine a ?ow of
time of the machine intended therefor.
20
cooled material passes through the channels 34, the ‘cool
As mentioned above, the pump casing 8 contains three
ing chambers 32 and from these through the channels
gear pumps 9, 10 for each refrigeration cell 2, the ?lling
36 and the tubes 38 to one of the chambers in the top
machine being intended for the ?lling of three different
part and from there to the gear pumps. This ?ow of
kinds of material, e.g. ice-cream of three different
colours, into each refrigeration cell. In the lower part 25 material causes an extra cooling of the outermost gear
pumps 9, 10 in the pump case by heat transmission, in
of the pump casing 8 there is ?tted an elongated ?ller
part through the end wall of the pump casing and the
block 18 having a number of openings 19, one for each
spacers located outside the outermost pump gear wheels,
gear pump. The ?ller block 18 is supported by a bot
in part through the ends of the pump shafts 12 and 14
tom part 20 which is bolted to the pump casing and in
which a number of vertical channels 21 are provided, one 30 extending into the cooling chambers. As a consequence
of this extra cooling of the outermost pumps it becomes
in line with each opening 19. A downwards-directed
possible to maintain a very uniform temperature of the
?lling tube 22 is telescopically displaceable in each ver
material which through the individual pumps is sup
tical channel 21; as there are three gear pumps 9, 10
plied to the refrigeration cells 2, so that the drawbacks,
for each refrigeration cell 2, there are also three ?lling
tubes 22, which in the position of the ?lling unit shown 35 pointed out in the preamble, in the known ?lling ma
chines, which are due to undesired variations in the
in FIG. 1 project into each refrigeration cell 2. The
temperature of the material in the individual pumps, are
telescopical mobility of the ?lling tubes 22 prevents break
remedied. As the supply branches, 31 and 41, respec
down of the machine if inadvertently an ice-cream brick
tively, for the distribution chambers 24, 25, and 26 of
should happen to be in one of the refrigeration cells 2
the top part lie in the vicinity of the ends of the chambers,
located under the ?lling unit in order to get ?lled.
so that the coldest material is supplied to the outermost
To the upper side of the pump casing 8 a top part 23
pumps, the uniformity of the material discharged through
is secured containing three mutually separated chambers
the ?lling tubes 22 as regards temperature and consistency
24, 25, and 26 extending longitudinally through the top
is furthermore improved.
part. To each of the three chambers 24, 25, and 26, one
On the upper side of the top part 23, three cylinders
of the three different materials is supplied which
by means of the pumps 9, 10 are ?lled into the refrigera
tion cells 2. The communication between the three
chambers and the gear pumps is provided by means of
42 are mounted, each of which communicates with one
of the chambers 24, 25, and 26. Each of the cylinders
42 contains a weight-loaded piston 43, each of which
serves as over?ow valve for one chamber, as, when the
openings 27, 28, and 29 in an elongated ?ller ‘block 30
?tted into the upper side of the pump casing 8 between 50 piston 43 is raised a certain distance, excess material
can ?ow out through over?ow pipes 44. In the bottom
the top part 23 and the gear pumps. As will be seen
part 20 a retractive suction mechanism is mounted which
from FIG. 2, the openings 27, 28, and 29 are so staggered
is provided with a horizontally movable piston 45 for
in relation to each other that the openings 27 establish a
each vertical channel 21. All the pistons 45 are actu
communication from the chamber 24 to every third gear
pump 9, 10, while the openings 28 and 29 correspond 65 ated simultaneously by means of a pneumatic cylinder
46 at certain pre-determined points of the vertical mo
ingly establish communication from the chambers 25
tion of the ?lling unit. As neither this retractive suc
and 26, respectively, to the remaining pumps 9, 10, so
tion mechanism, nor the over?ow valves 43 form any
that—when the gear pumps rotate-three different kinds
part of the present invention they are not further de
of material are supplied to the three ?lling tubes 22 in
each refrigeration cell 2.
60 scribed.
FIG. 4 shows the invention used in combination with
On its upper side the top part 23 carries four
a ?lling machine where each refrigeration cell is ?lled
threaded branches 31, of which the two seen in FIG.
with only one kind of material and where the ?lling is
1 are in communication with the central chamber 25 of
effected by means of reciprocating pistons, e.g. as de
the top part, while the two branches shown in FIG. 3
are in communication with the chamber 26. These 65 scribed in my copending patent appl. No. 522,607, now
Patent No. 2,965,141. This ?lling machine is, as is the
branches serve for fastening supply tubes for two of the
case with the ?lling machine described above, provided
three materials which are preferably supplied in a pre
with a ?lling unit which in time with the stepwise mo
frozen state by continuous refrigerators.
tion of the rotary table of the refrigerator is moved ver
The material for the chamber 24 is supplied, like
wise preferably in a pre-frozen or pre-cooled state, not 70 tically up and down. The ?lling unit has a pump cas
ing 47 with a cylindrical bore, in which a cylindrical drum
directly to the chamber, butrto two cooling chambers
48 can rotate. The drum 48 is ?xed axially in the pump
32 located at either end of the pump casing 8. At its left
casing 47 and at its end not shown, which faces the sta
end (adjacent the intermediate part 7 ) the pump casing
tionary part of the ?lling machine, it is connected to a
8 is so designed that it directly contains the cooling
chamber 32 there present, while the cooling chamber 32 75 driving mechanism which is arranged for rotating the
3,035,417
5
6
drum 180° about its horizontal axis at certain points of
said pumps, said inlet duct means being over at least a _
the motion of the ?lling unit.
portion of its extension in heat exchanging contact with
The drum ‘48 is provided with a row of cylindrical
bores ‘49 which extend at right angles to its axial direc
tion and the axes of which lie in a plane through the drum
axis. In the cylindrical bores 49, of which there is one
an outer housing of the outermost pumps in said row of
pumps.
of a union nut 62 is connected to a discharge tube 63
extending longitudinally of said casing and journalled
3. Apparatus for ?lling pro-cooled material into a row
of refrigeration cells, comprising a casing, a row of dis
for each refrigeration cell 50 in each radial row of cells,
placement pumps in said casing, an inlet chamber ex
loose pistons 51 are slidable, one in each bore. The
tending longitudinally of said row of pumps and com
pistons 51 are furthermore in?uenced by weight-loaded
municating with the inlet side of each pump, inlet duct
rods 52 which are slidable in vertical bores in a horizon 10 means opening into said inlet chamber and being over
tal stationary arm 53 above the ?lling machine. The
at least a portion of its extension in heat exchanging con
rods 52 are ‘furthermore guided by a horizontal rail 54
tact with an outer wall of the outermost pump at either
extending internally in a supply container 55 which is in
end of said row of pumps.
?xed connection with the pump casing 47.
4. Apparatus as claimed in claim 3 in which said in
To the underside of the pump casing 47 a row of tele
let duct means opens in said inlet chamber near the end
scopic ?lling tubes 56, 57 are secured, one for each bore
thereof.
49 in the drum 48. The further mode of operation of
5. Apparatus for ?lling pre-cooled material into a row
the ?lling machine is described in the above-mentioned
of refrigeration cells, comprising a casing, a row of dis
patent application No. 552,607.
placement pumps in said casing, an inlet chamber ex
According to the invention there is externally on the 20 tending longitudinally of said row of pumps and com
pump casing secured an end part 58 which de?nes a
municating with the inlet side of each pump, a cooling
cooling chamber 59 which is open towards the pump .
chamber in said casing adjacent an outer end wall of the
casing 47 and the end of the drum 48, and pre-cooled
outermost pump at either end of said row of pumps, in
let duct means opening into either of said cooling cham
material is supplied to the cooling chamber 59 through
a horizontal rearwards-directed channel ‘60, to the open 25 bers and duct means from either of said cooling chambers
end of which a supply tube, preferably from a continu
to said inlet chamber.
6. Apparatus for ?lling pre-coolecl material into a row
ous refrigerator is connected. The end part 58 has a
of refrigeration cells, comprising a casing, a ?rst shaft
vertical upwards-directed extension 61 which by means
which extends upwards along the wall of the container 30 therein, means for rotating said ?rst shaft, ?rst pump
gear wheels d-rivingly connected to said ?rst shaft, sec
55 and above the upper edge of the latter, where it is
ond pump gear wheels meshing pairwise with said ?rst
bent downwards. The material, which by the piston
gear wheels to form therewith a row of pumps, a second
pumps 49, 51 is to be supplied through the ?lling tubes
shaft supporting said second pump gear wheels and jour
56, 57 to the refrigeration cells 50, thus passes through
nalled in said casing, a cooling chamber adjacent an outer
the cooling chamber before entering the container 55.
wall of the outermost pump at either end of said row of
A quite analogous cooling chamber is mounted in con
pumps, the ends of said ?rst and second shaft extending
nection with the other end, not shown, of the pumping
into said cooling chambers, inlet duct means opening into
cylinder 47, and it will be appreciated that this cooling
either of said cooling chambers, duct means from either
in FIGS. 1-3, may be designed either in the pump case 40 of said cooling chambers to an inlet chamber extending
longitudinally of said row of pumps and communicating
or in an end part secured to the latter.
with the inlet side of each pump, and outlet means from
The invention is not limited to the embodiments here
chamber, as was the case with the embodiment shown
shown and described which can be varied in numerous
each pump to an associated refrigeration cell.
7. Apparatus for ?lling a plurality of pre-cooled ma
ways within the scope of the invention. It is particu
larly pointed out that the pumps supplying material to‘ 45 terials into a row of refrigeration cells, comprising a row
of displacement pumps, outlet means from each of said
the refrigeration cells may be of any other suitable design
pumps to an associated refrigeration cell, and separate
than those here described, and in any case the ?lling ma
chine may be arranged for supplying one or more differ
inlet means for each of said materials each communi
cating with the inlet side of a number of pumps for the
ent kinds of material to each refrigeration cell, either si
multaneously or successively. The invention may also be 50 material in question, at least one of said inlet means be
ing over at least a portion of its extension in heat ex
utilized in ?lling machines which do not comprise a pump
changing contact with an outer housing of the outer
casing common to all the pumps in the row of pumps.
most pumps in said row of pumps.
Each pump may have a casing of its own, or they may
8. Apparatus for ?lling a plurality of pre-cooled ma
be a separate casing for a number of pumps, e.g. in the
embodiment illustrated in FIGS. 1-3 for three pumps as 55 terials into a row of refrigeration ‘cells, comprising a cas
ing, a row of displacement pumps in said casing, driving
sociated with one refrigeration cell. Dependent on the
means for said pumps, an inlet chamber for each of said
operation conditions prevailing it is also possible that
materials extending longitudinally of said row of pumps
only part of the quantity of material supplied to the
and communicating withthe inlet side of a number of
pumps is used for cooling the outermost pumps of the
row, and the constructive means, by which this cooling 60 said pumps for delivering said material to outlet means
leading from each pump to an associated refrigeration
is achieved, may differ from those here shown.
cell, a cooling chamber adjacent an outer endwall of the
What I claim is:
outermost pump at either end of said row of pumps, in
1. A method for obtaining uniform temperature con
let duct means opening into either of said cooling cham
ditions of a pre-cooled material which is delivered into
a row of refrigeration cells by means of a row of meter 65 bers, transfer duct means from either of said cooling
chambers to one of said inlet chambers, and inlet duct
ing pumps associated with said ‘refrigeration cells, in
means leading directly to the remainder of said inlet
which at least part of said material is caused to ?ow ex
chambers.
ternally in heat exchanging contact with the outermost
9. Apparatus as claimed in claim 8 in which said
pumps in said row of pumps before being delivered to
said refrigeration cells.
70 transfer duct means and said inlet duct means leading to
said inlet chambers open in said chambers near the ends
2. Apparatus for ?lling pre-cooled material into a row
thereof.
of refrigeration cells, comprising a row of displacement
10. Apparatus for ?lling a plurality of pre-cooled ma
pumps, outlet means from each of said pumps to an as
terials into a row of refrigeration cells, comprising a cas
sociated refrigeration cell, and inlet duct means for said
material communicating with the inlet side of each of 75 ing, a ?rst shaft extending longitudinally of said casing,
$035,417
7
8
means for rotating said ?rst shaft, ?rst pump gear wheels
drivingly connected to said ?rst shaft, second pump gear
wheels meshing pairwise with said ?rst gear wheels to
to an associated refrigeration cell, inlet duct means to
either of said cooling chambers, transfer duct means from
either of said cooling chambers to an associated inlet
chamber, and inlet means leading directly to the re
mainder of said inlet chambers.
form therewith a row of pumps, a second shaft support
ing said second pump gear wheels, a cooling chamber ad
jacent an outer wall of ‘the outermost pump at either end
of said row of pumps, the ends of said ?rst and second
shaft being journalled in said casing and extending into
said cooling chambers, a plurality of inlet chambers, one
for each of said materials, extending longitudinally of said
0
References Cited in the ?le of this patent
UNITED STATES PATENTS
796,724
Hewitt ________________ __ Aug. 8, 1905
row of pumps and communicating each with the inlet
side of a number of said pumps for delivering the ma
2,736,480
Anderson ___________ __ Feb. 28, 1956
2,750,891
Berry ________________ .__ June 19, 1956
terial in question to outlet means leading from each pump
2,791,890
Hoyer ______________ __ May 14, 1957
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