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Dec. 3, 1946.
H, ,__ MAKER '
2,412,167
METHOD AND MEANS FOR VACUUMIZING AND GASSING FILLED CONTAINERS
Filed April 1'7, 1944
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Dec. 3, 1946.
H. L. MINAKER
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2,412,167
METHOD? AND MEANS FOR VACUUMIZING AND GASSING FILLED CONTAINERS
Filed April 17, 1944
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Dec. 3, 1946.
H, |_, WNAKER
2,412,167
METHOD AND MEANS FOR VACUUMIZING AND GASSING FILLED CONTAINERS
Filed April 17, 1944
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Patented Dec. 3, 1946
2,412,167
UNITED STATES PATENT OFFICE
2,412,167
METHOD AND. MEANS FOR VACUUIVIIZING
AND GASSING FILLED CONTAINERS
Herbert L. Minaker, Syracuse, N. Y., assignor to
Continental Can Company, Inc., New York,
N. Y., a corporation of New York
Application April 17, 1944, Serial No. 531,526
23 Claims.
1
(Cl. 226-82)
This invention relates to improvements in the
method of vacuumizing and gassing containers
?lled with dehydrated foods or other products
prior to scaling the containers. and to means for
practicing said method.
It is common practice in treating canned de
hydrated foods prior to sealing the cans, to place
the ?lled can or container in a chamber and after
sealing the chamber to draw o? the air until the
desired vacuum has been produced, then admit
ting an inert gas until the desired relieving of
the vacuum in the can by introduction of the
inert gas thereinto is attained.
In some instances a closure for the can or
container is supported above the can during the
vacuumizing and gassing periods and then placed
on the can prior to opening the chamber and
sealing the can. With this method some success
is obtainable When the material within the can
2
A further object of the invention is to provide
means for vacuumizing and gassing ?lled
containers comprising a treating chamber
equipped with means whereby the lid or closure
of the container will be manipulated within the
chamber to prevent the escape of material from
the container during the vacuumizing period,
then partially opened to freely admit the gas,
and then closed to prevent free entry of air to
the container when the chamber is? opened and
the container is removed to the double seamer
for sealing.
A further object of the invention is to provide
a treating chamber as mentioned equipped to
accommodate a plurality of ?lled containers, and
provided with means for manipulating all of the
closures simultaneously, in the manner above
stated.
>
Other objects willappear hereinafter.
is coarse and heavy; but with light and ?nely 20
With these objects in .view this invention com
comminuted material, the expansion of the con
prises a method consisting in placing a ?lled con
tained air, as the vacuum is being produced,
tainer and its closure or lid ?within a treating
causes more or less violent agitation of the ma
terial and loss of considerable portions thereof
' mm the containers.
In another method the closure has been
clinched to the can before it is placed in the
chamber. With this method the vacuumizing
can be satisfactorily accomplished, but when the
gas is admitted to the chamber, the can collapses 30
as the gas cannot enter the can fast enough due
to the vacuum holding the lid tightly on the can.
In other devices the closures are not placed
within the chamber with the cans but are ap
plied as the can is removed from. the chamber
after treatment, but with this method there is
the same loss of material from excessive agita
tion as mentioned in connection with the ?rst
chamber, holding the.closure in position, creat
ing a vacuum within thechamber, partially open
ing the closure, admitting gas to the chamber at
the desired pressure, replacing the closure and
removing the container from the chamber to
transfer the same to the sealing device, such
as a double seamer.
The invention further consists in a method as
above stated in which the closure is held in posi
tion during the yacuumizing period by applying
pressure. to diametrically opposite points on the
edge of the closure, and thereafter releasing the
pressure at one of the points of application,
whereby the pressure which is maintained at
the opposite portion of the closure will tilt the
closure for admitting gas during the gassing
described method, and furthermore it is prac
period.
tically impossible to prevent air from entering 40
The invention further consists in a vacuum
the cans before the closures are applied, and in
izing and gassing apparatus comprising a treat
such quantities as to preclude proper preserva
ing chamber to receive a ?lled receptacle having
tion of the food.
a ?anged neck, with the lid or closure for the
An object of the present invention is to pro~
same resting on the ?ange of said neck, means
vide a method of vacuumizing and gassing de 45 for sealing said chamber, means for creating
hydrated products in the containers whereby
a vacuum within said chamber, a valve for con
even the lightest and most ?nely comminuted
trolling the same, valved means for injecting
material will be completely retained within the
gas into said chamber, pressure members adapted
container during the vacuumizing period. the gas
to engage the closure at diametrically opposite
permitted to freely enter the container prefer
sides of the edge thereof, means for actuating
ably but not necessarily under pressure during
said pressure members from without the cham
the gassing period to prevent collapsing or dis~
ber whereby the pressure may be applied to the
tortion of the container, and the can closed
lid by both pressure members during the vac
against free admission of air prior to removal
uumizing period and then to retract one of said
of the container from the treating chamber.
55 members whereby the pressure of the other mem
2,412,167
her will tilt the closure to slightly elevate the
opposite edge, a bar in the chamber having a
bevelled nose to move beneath said elevated edge
to further tilt the closure, and means for actu
ating said bar to insert the same under the
4
wheel 26 and screw 21 for tightening the door
against the gaskets l9.
Although the invention is not limited to any
particular size or capacity of the chamber, it is
preferably constructed to accommodate three,
?ve pound square cans. These are inserted suc
closure for the gassing period and to thereafter
cessiveiy into the chamber Hi through one end
retract the same and for lowering the retracted
thereof, and are removed through the other end
pressure member sufficiently to assist in seating
as will be more fully described hereinafter. To
the closure and serve as a guide to keep the
facilitate sliding the cans through the chamber,
closure seated on the ?anged neck as the con l0 tracks or ways 28 are provided which extend from
tainers are pushed out of the chamber.
end to end of the bottom of the chamber. The
The invention further consists in providing the
cans are maintained in proper position in the
treating chamber with a single port, preferably
chamber for manipulation of the tops or clo
in the bottom thereof, and from which extends
sures, by guides 29 formed on the inner faces of
15
a valved pipe communicating with an air pump
the side walls as illustrated in Figure 2 of the
or other vacuum producing means, the port being
drawings. These guides are spaced above the
also connected through a valved pipe with a gas
ways 28 a sufficient distance to provide a space
tank, so that by manipulating the valves, the
30 to accommodate the bottom seams of the cans.
vacuumizing and gassing may be controlled as
The chamber ID is provided with base ?anges
20
desired.
3| which rest upon and are secured to a table
With the above and other objects in view that
top or frame 32 supported upon legs 33. Sup
will hereinafter appear, the nature of the in
ported beneath the top frame 32 is a gas tank 34
vention will be more clearly understood by ref
to contain the inert gas under suitable pressure.
erence to the following detailed description. the
This tank is supplied with gas through a feed pipe
appended claims, and the several views illus
35 in which is located a pressure gauge 36 and
trated in the accompanying drawings.
safety valve 31. Leading from the tank 34 to the
In the drawings:
bottom of the chamber 10 is a pipe 38 provided
Figure 1 is a. plan view of a vacuumizing and
with a valve 39 which is actuated by a hand lever
gassing device embodying the invention.
30 40. The pipe 38 is provided with a T-connection
Figure 2 is a vertical transverse section of the
4| directly beneath the center of the bottom l3,
same taken on the line 2?2 of Figure 1.
to which it is connected by a nipple 42 tapped
Figure 3 is a similar view of the upper portion
into a vertical bore forming a port 43 therein.
of the- device upon an enlarged scale.
In order to prevent a superposed can from inter
Figure 4 is a diagrammatic view illustrating
fering with a free and uniform distribution of
the connections between the treating tank and
the gas, the upper end of the bore is preferably
the gas tank and air pump.
enlarged as at 44, and a tapered groove 45 is ex
Figure 5 is an enlarged detail section of the
tended longitudinally, a suitable distance toward
upper end of a can with the closure in the posi
each end of the chamber.
tion in which it is placed when inserting the can 40
Connected to the opposite arm of the T from
into the treating chamber and when being re
that to which the pipe 38 is connected, is a pipe
moved therefrom.
Figure 6 is a similar view with the pressure
member in the position for holding the closure
during the vacuum period.
46 leading to an air pump 41 or other means for
exhausting the air in the tank. A valve 48 is ar
ranged in the pipe 46 and provided with a lever
49 for manually operating the same. By having
Figure '1 is a similar view with the parts in
the positions for holding the closures during the
the air withdrawn from the bottom of the cham
ber, as shown, the agitation of the material dur
gassing period.
ing the vacuumizing period is greatly reduced.
In operating the device one of the doors I5 is
Referring to the drawings. in indicates the
treating chamber which consists of an elongated 50 opened and the filled cans, with the lids resting
on the ?anged necks as illustrated in Figure 6,
rectangular box member, open at both ends. and
are pushed into the chamber In, after which the
formed of side walls II and I2. a bottom l3 and
door is closed and sealed. The valve 48 is then
top wall It. The sides, top and bottom are pref�
opened causing the air in the chamber to be ex
erablv of integral construction. Each end is
provided with a closure l5 pivotally mounted 55 hausted until it is lowered to the desired pres
sure, and the valve is closed. Then the gas valve
at one of its lower corners as indicated at ?F
39 is opened, admitting gas to the chamber until
to swing in a plane parallel with the end of
the desired pressure is attained. The valve 39 is
the chamber. and adapted to rest upon a sup
then closed and both doors it are opened and
porting bracket I1 when in open position. A
knob or handle I8 is provided on each door for 60 the cans removed for immediate sealing, as by
the usual double seamer.
,
manipulating the same. Each end of the cham
When the cans are placed in the chamber, air
ber is provided with an annular gasket l9 which
under normal atmospheric pressure ?lls the in
is preferably mounted in a corresponding groove
terstices between the particles of material in the
formed in the outer edges of the chamber walls,
cans, so that as the air is exhausted, the air in
to tightly seal the doors when closed and fastened.
said interstices expands. With coarse material
As ?the gasket and the groove for the same is
in the can this expansion causes but little agita
of ordinary construction the details thereof are
tion of the material, but when the cans are filled
not illustrated. To hold each door tightly closed
with ?nely comminuted or powdered products.
against its gasket 09, a transverse presser bar
20 is provided having a boss 2i which engages. 70 this rapid expansion of the air causes violent
agitation of the contents and a resulting tend
a bOSs 22 formed centrally on the door. The
ency to eject a portion of the material from the
bar 20 is pivoted at one end 23 upon a pin 24
can. It is therefore desirable to ?rmly but yield
which is hinged between a pair of lugs 25 on a
ingly hold the lids in closed position on the cans
side of the chamber adjacent the end. The op
posite end of the bar 20 is provided with a hand 76 duringr the vacuumizing period, there being suiii
5
25412, 187
6
.acient. leakage of air between the lid and, the neck
' ?ange? during this period 'to_'permit vacuumizing,
and'the lids will prevent the loss ?or-material.
In Figures 3, 5, ,6 and 7 of the drawings the
upper portion of one of the cans is: illustrated, ?50
indicating the body of the can having a top 5i
provided with a ?lling opening 52 de?ned by a
?anged neck 53. The lid or closure '54 is of the
usual type, .having the outwardly extending
peripheral flange, 55 terminating in the inturned
flange 56 for interlocking with the outwardly
?ared ?ange on the neck to seal thecan.
To hold the lids during the vacuumizing period
as stated, means are provided for engaging the
5
When? said? bar is raised from the lids while the
plungers'?ll are pressing on the opposite side
of the lids, said lids will be tilted upwardly as
illustrated in Figure 8, ?which is the position of
the lids while gassing.
The bevelled under face ~59 of the plunger 58
will assist materially in tilting the lid and holding
the same in tilted position, but it is, preferable to
provide means for positively holding the lids
after they have been tilted, so? that the gas en
tering the chamber will not forcibly close the
lids, and crush or disturb the cans before the
vacuum therein can be overcome.
To this end a
cover support bar 39 is provided which is of
lids at diametrically opposite ?points on the 15 sufficient length to simultaneously engage under
?anged edges with su?icient pressure to maintain,
all of the tilted lids in the chamber. Said bar
them in closed but not air sealed position. This
89 is formed with a bevelled forward edge or nose
comprises a presser bar 51 extending longitu
90, and is supported upon a pair of rods 9| which
dinally of the chamberv above the points of ap
are ?xed thereto and extend laterally through
plication on one side of the lids and of su?icient V20 packing glands 82 in the side of the chamber.
length to engage the several lids, and a plurality
The rods 9| are connected to the lever bars 86
of plungers 58, one for each can, arranged in a
row parallel with the bar 51 to engage the edges
of the lids at diametrically opposite points from
the bar 51.
The plungers 58 are each formed with a bev~
elled underface 59 sloping outwardly and down
wardly for a purpose hereinafter described; and
with an upwardly extending stem 60 which pro
jects through an air-tight packing gland 6| in
the top of the chamber. The stems also extend
loosely through a horizontal, longitudinally dis
so that as the lever 85 is actuated to raise the
bar 51, with consequent tipping 0f the lids, the
bar 89 will be moved inwardly with its bevelled
edge or nose wedging in between the lid and the
neck of the can, and the bar will then support
the lids during the gassing period, and until it
is withdrawn as the bar ?51 is lowered to assist
in reseating the lids.
The bar 51 has three distinct positions during
the processing. First, the initial position while
posed bar 62, and are provided on their upper
the cans are being placed within the chamber,
which is close abovethe lids to prevent them
Interposed
ends with adjusting
between the
nutsbar?83 62and
andlock
a collar
nuts on
from becoming displaced, but not pressing there
on. This is with the lever in the so-called ?new
each of the stems is a spring 65 for yieldingly
tral position.? Second, in the lowermost posi
holding the respective plungers on the edge of
tion to ?rmly presson the lids to hold them
the can lid. The bar 62 is supported by a pair
during the vacuumizina period. Third, when
of levers 65 having bifurcated ends 61 to receive
raised to the highest position where it remains
the bar. The opposite ends 68 of the levers 65 40 during the gassing period. In order that the
are mounted on a shaft 69 supported in brackets
operator may know when the bar is in the correct
19. The levers 65 are so spaced as to engage
position at each stage, means are provided for
the bar 62 approximately midway between ad
this purpose. Although various means may be?
jacent plungers to equalize the pressure of the
employed. a simple form as shown in the draw
several plungers when applied to the can lids.
ing's is the provision of a detent on the lever ?85
The plungers are actuated by a hand lever 1|
adapted to engage a. notched bar 94 ?xed to a
comprising a pair of lever bars 12 pivotally
wall of the chamber.
mounted on a shaft 13 supported by brackets
The operation of the device is as follows: Be~
?M, and are connected at their outer ends by a
fore placing the containers in the chamber 10,
handle bar 15. The lever bars 12 each have M the levers 1| and 85 are positioned as illustrated
a short angularly disposed leg 16 which is con
in Figure 2, that is, with the pluncers ?5B raised
nected by a drag link 11 to the respective lever
and the presser bar? 51 lowered to just clear the
66. When the hand lever ?H is in the position
lids of'the cans. The cans, packed to the de
illustrated in Figure 2. the plungers 58 are re
sired capacity, and with the lids restingr on the
tracted. By moving the lever 1| to the position 55 ?ange of the collar 53, as shown in Figure 6,
illustrated in fulllines in Figure 3. the plungers
are then pushed successively into the chamber
are lowered to engage the edges of ?the can lids,
by sliding them along the track-ways 28. As
and through the medium of the spring 65 are held
before stated, the presser bar 51 is so positioned
in ?rm but yielding engagement therewith.
that the cans with their lids will slide freely
To the presser bar 51 are ?xed a pair of ver (ill beneath it, at the same time the bar will pre
tical rods 18 which extend through packing
vent accidental displacement oi? the lids. After
glands 19 in the top of the chamber. and the up
the cans are in place, the door is closed and
per ends of these rods are connected as at 80
clamped in position to render the chamber air
to horizontal arms ill of bell-crank levers
tight. The lever 1| is then raised, lowering the
82. which levers are mounted on the shaft 69.
plungers 58 into engagement with the lids. This
?The depending arms 83 of the levers 82 are each
is a yielding pressure through the medium of
connected by a link 84 with side bars 85 of a
the spring 65, and tipping of the lids is pre
hand lever as. The lever bars 35 are connected
vented due to the position of the bar 51 in close
at their upper ends by a handle bar 81 and are
proximity to the lids. The lever 85 is then moved
mounted at their lower ends on brackets 88 on
a side of the chamber. It is evident that by
moving the handle bar 81 outwardly the bar 51
will be lowered into position to engage the can
outwardly forcing the bar 51 ?rmly onto the
lids. Although the bar and the plungers 58 hold
the lids ?rmly in position they do not hold the
lid so as to seal the same, but will permit the
lids as above stated, and that by moving the
air to escape as soon as the pressure outside
handle bar inwardly said bar will be raised. 75 of the can is lowered belo-w'that of the air-?con.
2,412,167
7
the lid on the neck of the can.
a heavier-than-air. gas, a lighter-than-air gas
Also, as the
may be employed, depending upon the nature
of the material in the cans, and that such lighter
pressure is applied only at diametrically opposite
points on the large diameter rim of the lid, a
gas may be used at any desired pressure.
While one form of the invention has been
shown for purposes of illustration, it is to be
slight ?exure is permitted at the other portions
of the rim, due to the unbalanced pressure and
the ?exibility of the relatively large closure. In
other words, the lids are held in closed but not
air sealed position, because, due to the normal
unevenness of the contact lines of the lid and
the can neck and the ?exibility of the closure as
aforesaid, sufficient crevices between the lid and
the can neck inherently exist and permit the
air to escape.
The valve 48 is then opened to vacuumize the
chamber, the air in the cans escaping between
the lids and the can neck ?anges. However, ir
respective of any agitation of the material with
in the cans, the contents are retained therein.
After the air has been exhausted to the desired
amount as indicated by a vacuum gauge 95, the
valve 48 is closed, and the lever 85 moved in
wardly, raising the bar 51. As the bar 51 rises
the lids are tilted upwardly under the bar due
to the pressure of the bevelled faces 59 of the
plungers 58. As the lids rise with the bar 51,
the bar 89 is simultaneously moved inwardly,
the bevelled nose 9!! thereof pushing under the
lids to further raise them and hold them in
8
vacuumizing. It is also to be understood that
while I have described the invention as used with
tamed within the can. This is due partly to
the normal unevennesses in the contact lines of
clearly understood that various changes in the
10 details of construction and arrangement of parts
may be made without departing from the spirit
and scope of the invention as de?ned in the
appended claims.
I claim:
I. A method of treating canned material prior
to sealing the can comprising, subjecting the
15
?lled can to a vacuum while the lid is held in a
closed but not air sealed position, then intro
ducing an inert gas into the can with the lid
20 thereon partly raised, and then returning the lid
to said closed position.
2. A method of treating canned material prior
to sealing the can comprising, subjecting the
?lled can to a vacuum while the lid is yieldingly
25 held in a closed but not air sealed position, then
subjecting the can to an inert gas under pres
sure with the ~lid partly raised, and then return
ing the lid to said closed position.
3. A method of treating canned material prior
30 to sealing the can comprising, subjecting the
raised position during the gassing period.
?lled can to a vacuum while the lid is held in a
The valve 39 is next opened, admittingr the
inert gas, preferably but not necessarily under
closed but not air sealed position, then subject
pressure. When the gas is admitted under pres
sure its introduction is continued until the pres
sure within the chamber has risen to the desired
degree as indicated by a pressure gauge 98, and
der pressure with the lid partly raised, and then
returning the lid to said closed position.
4. A method of treating canned material prior
to sealing the can comprising, subjecting the
?lled can to a Vacuum while the lid is yieldingly
held in a closed but not air sealed position, then
ing the can to an inert heavier than air gas un
the valve is then closed. The supporting bar,
by keeping the top of the cans open during the
gassing, prevents uneven pressure inside and out
side the cans thereby avoiding crushing or dis
tortion of the cans by the pressure of the gas.
V subjecting the can to an inert heavier than air
gas under pressure with the lid partly raised,
and then returning the lid to said closed position.
5. A method of treating canned material prior
to sealing the can comprising, subjecting the
? It also permits the inert gas to freely enter and
relieve the evacuated condition in the cans and
dilute any residual air left after the vacuumiz
?lled can to a vacuum while the 11d of the can
is held in a closed but not air sealed position, and
thereafter relieving the evacuated condition in
the can with an inert gas and thereby diluting
ing. All the interstices between the particles of
the contents of the cans, and the space above the
same is now completely ?lled with the gas. The
levers ?II and 85 are now returned to neutral
position, raising the plungers 58, retracting the
bar 89 to drop the lids into closed position, and.
lowering the bar 51 to assist in seating the lids
and to serve as a guide to prevent displacement
of the lids in removing the cans from the device.
Both doors l5 are opened and the cans removed
any residual air in said can.
51]
6. A method of treating canned material prior
to sealing the can comprising, subjecting the
?lled can to a vacuum while the lid of the can is
held in a closed but not air sealed position, par
tially lifting the lid, thereafter relieving the
evacuated condition in the can with an inert gas
while said lid is lifted and thereby diluting any
residual air in said can, and then returning the
lid to ?said closed position.
7. A method of treating canned material prior
and there being no greater pressure of air at
the minute crevices between the lid and the 60 to scaling the can comprising, placing the can
with its lid in closed position thereon, in a cham
neck of the can than the pressure within, there
and passed to a double seamer for tightly seal
ing the same. As the gas which now ?lls the
cans is at full atmospheric pressure, or greater,
is no tendency for the air to force its way into
the can, particularly in the short space of time
required to move the cans from the chamber
to the double seamer for sealing the lids in
place. In removing the cans, they should be
pushed at the bottom so as not to disturb the
can or displace the lids.
ber, sealing the chamber, vacuumizing the cham
ber while holding the lid in closed position, par?
tially lifting the lid and admitting an inert gas
to the vacuumized chamber while the lid is lift
ed, to relieve the evacuated condition therein and
dilute any residual air in the can, and then re
turning the lid to said closed position while the
chamber is still sealed.
?
While I prefer in most instances to raise the
8. The method of treating canned material
gas pressure slightly above atmospheric pres 70
prior to sealing the can, consisting in placing the
sure, this is not necessary as the high vacuum
container with its lid resting in position to close
in the cans will cause the gas to freely enter
the container, within a chamber, tightly sealing
and relieve or replace the previously existing
said chamber, exerting pressure on the lid to
evacuated condition in the cans and sumciently
dilute any residual air that may remain after 75 hold the same in a closed but not air sealed p0
10
14, In a device for valc'uumizing and gassing
siting, vacuumizmgsaidchaeelisi' tooth? desired.
degree, releasing; the preseason
?lled, containers prior to scaling, comprising? a
chamber?fadapt?閐 tblfeceive?a' plurality of ?lled
lid and.
partially openinathcsame. adrrlttieaae inert
gas to said chamber andthen rerli?lacing; thejlid"
cansj?in ?appraisers; ~each can having its lid
rest i ?"15 trees thereon, a'siinilar number of
insaid clqsed msiiioil, while thechamber is. Still
sealed.
,
plfgfgjei's
V
to be moved simultaneossly into
9. The method of treating canned,? material
engagemeiit'y'with said lids and each normally
the container. wiinitslid restinaie resides. *9}
gageimeiitwher'with, wav vertically reciprocable
to,? tilt閠he lidsirespectivlely while in en
prior to scaling the caetcpnsistiee in Placing
pressei-fbarzeiitending'longitudinally of the cham
close the, container, within a? chamber, tightly;
sealing said chamber, exerting nressure oaldis
beiffaiid V ? anesthesia? lowermost position? to
lid to hold? the same in a closedJbut notairsealed :
in'l'ioldin'g the lids in a closed but not air sealed
position on the, cans, and when raised to permit
eng'age閍ch76?said lids and assist the plungers
metrically Opposite. points; on. the. edge. (if I the;
position, vawumizing. said Chenille? to; the (is:
sired degree, releasinathenrssslre oaths Bidet.
the several plungers; to tilt the respective'dids,
and a?lateijall'v reciproca'ble supporting bar adapt
one of said points and partially opening the
ed, to
""f?d'er seen? of said} lids as the edge
is u'pli'ft閐l'up'o?n raising the presser bar, and
to befretracted?a's the pressenis' lowered,
Same, admitting aninartgestc Said shambles
and-?ies, replacing, the-lid insaidiclosed position
while the chamber is stillsealegl,
19? A. method of treatieecaaned materialnrier
to Sealing the can wmnrisisa subjecting the
20
?lled cans to a vacuwnwliile the lid. is rieldiliely.
held in a Closed but not all? Sealed pqsitim. they.
15.? Infaiiievic� for vacuumizing and'gassing
?lledcontainers 'prior to scaling, comprising? a
chamber aliaptedto receive a plurality of??lled
cans?. zi'alinear'series, each can havingits lid
restinglixi Place thereon, a similar number of?,
replacing, the vacuum
the? can with, aninert,
gas while the lid ispalitly, raised. and then re 2b. plung閞s' adapted to be moved simultaneously
into engagement with said lids and each normally?
turning the lid to said closed position While the
chamber is still sealed.
tending, to, on the lids respectively while in
presseg har?eigtending longitudinally of the cham
,
engagement therewith, a vertically reciprocable
11. In a device of the class described, a,v 0974371,,
her adapted to. receive, a. receptacle containing
a substance to be treated, withaclvsure tenths,
receptacle resting, in position thereon, means ?for
her and; adapted; when in? lowermost position to
engage ?each, of said lids andiassist the plungers,
in holding the lids in a closed but not air sealed
position on the cans, and when raised to permit
ing an inert gas into said; chamber, means for?
the several lplungers to tilt the respective lids,
controlling said v?lqllllmizing means, means for
controlling said gas introducing, means, means 35, a laterally reciprocable, supporting bar adapted
to engage under, each of said lids as the edge is
engageable withsaid closure for, applying pres:
uplifted upon; raising the presser bar, and to be
sure thereto to hold the same, firmly in a closed
but not air sealed position during? the, vacuum
retracted asthe, presser bar is lowered, and a
single manually operable member for simultane
izing period, means engageable with said clo_
sure for partially raising the same? after the, 40 ously actuating said presser bar and, said sup
vacuumizing period, and means engageable with
porting bar.
said closure for holding thev same in partially
16. In a device of the class described a cham
raised position during the gassing period and
ber including side walls a, top and a bottom, and
adapted to receive a. ipluralityof cans in align;
disengageable from said closure-for restoring the
vacuumizing said chamber, means for. introduc
same to said closed position.
ment, said, cans each having a lid resting in
?
closing position, slideways forsupporting the cans
above the bottom, a port, in said bottom, vac
12. In a device ofthe class described; a cham
ber adapted to receive acan containing a sub
stance to be treated with the, lid for said can
resting in place thereon, a, plungeradapted to
uumizing means, a sourceof inert gas supply,
be moved into engagement with said lid and, '
normally tending to tilt the lid while in engage,
ment therewith, a vertically reoiprocable presser
bar adapted when in lowermost position to assist
said plunger in holding the lid in a closed but
not air sealed position on the can and when
raised to permit the plunger to tilt the lid, and
a laterally reciprocable member adapted to be
inserted beneath the uplifted edge of the tilted
lid as the presser bar is raised, and retracted as
the presser bar is lowered.
13. In a device of the class described a cham
ber adapted to receive a can containing a sub
stance to be treated with the lid for said can
pipes connecting said vacuur'nizing, means and
said source. ofjEa-s supply to said chamber through
said port, a valve in each of said pipes, means
for holding the ,lids in closed but not air sealed
ipositionionlthe cans when the valve to the vac
uumizingj means isopen, means for tilting the
lids after said valve 'is closed, and means for
maintaining said lids in tilted position when the
valve in the gas supply pipe is open.
17. In a device of the class described a cham
her having side walls, a top and a bottom, and
open at the end, means for closing and sealing
said ends, track-Ways extending longitudinally
through said chamber to receive a plurality of
?lled cans and hold the same elevated above
resting in place thereon, a plunger having a bev
the floor, each of said cans being provided with
elled face adapted to be moved into engagement Ci L7 a lid resting loosely in closing position, vacuum
with said lid and normally tending to tilt the
izing and gassing means communicating with
lid while in engagement therewith, a vertically
said chamber through said ?oor, a plurality of
reciprocablc presscr bar adapted when in lower
plungers adapted to individually engage said lids
most position to assist said plunger in holding
respectively and having stems extending through
the lid in a closed but not air sealed position
said top, a bar above said top through which said
on the can and when raised to permit the plunger
to tilt the lid and a laterally i'eciprocable mem~
her adapted to be inserted beneath the uplifted
edge of the tilted lid as the presser bar is raised.
and retracted as the presser bar is lowered.
stems loosely extend, a stop on each of the stems
above said ?her, a collar on each stem, a spring
interposed between said bar and each of said
collars, a pair of supporting levers pivotally
75 mounted above said chamber and having bifur
2,412,1e7
,
11*
'
12
cated ends in which said bar is held, a hand
lever, and drag- links between said hand lever
and said supporting levers whereby said hand
2::
21. In a device for vacuumizing and gassing
cans of commodities with the lids resting there
on, a chamber, means for air sealing said cham
ber; ways in said chamber upon which the cans
at'ing said bar to lower the same into engagement
with the lids to assist said plungers in holding
the lids 'in closed'bfut not air sealed position dur
ing the vacuumlzing period?and to raise said bar
,
the narrow-?a can during movement of said can
along said chamber incidental to withdrawal
thereof from the chamber.
lever may be actuated to lower-said plungers into
yielding engagement with said can lids, a verti
cally reciprocable presser? bar extending longi
tudinally of the chamber, and means for actu
-
be eif閐tlve issa guide to prevent displacement of
are slid into and out of said chamber, a bar in
1O said chamber parallel with said ways and means
to permit the plunger-s to tilt the lids for the
operable from without the sealed chamber for ac
tuating said bar to hold the lids in place during
gassing period.
the vacuumizing period and also to position the
18. in a device of the class described, a cham
said bar to prevent displacement of the lids while
ber adapted to receive a can containing a sub 15 moving the cans from the chamber after treat
stance to be treated with the ?anged lid of the
ment.
can resting in place thereon, a member having a
22. In a device for vacuumizing and gassing
bevelled face adapted to be moved into engage
cans of commodities with the lids resting in place
ment with a portion of the peripheral ?ange of
thereon, a chamber open at both ends and
said lid and exert yielding pressure thereon, and 20 adapted to hold a plurality of cans, means for air
a vertically reciprocable presser member adapted
sealing both ends of said chamber, ways in said
to engage said ?ange at a diametrically opposite
chamber upon which the cans are slid into and
portion than that engaged by the ?rst said mem
out of said chamber, a bar supported in the up
ber, said bevelled face being bevelled upwardly
per portion of said chamber above the can lids,
towardsaid presser member, and means operable 25 and parallel with said ways, and means operable
at times for holding the bevelled face member and
from without the sealed chamber for actuating
the presser member against the? lid for holding
said bar to ?rmly engage said lids during the vac
it in place on the can and at other times for hold
uumizing period and also to position said bar to
ing the bevelled face member against the lid and
prevent displacement of the lids while moving the
lifting the presser member away to cause the lid 30 cans into and out of the chamber.
to be tilted upwardly by the bevelled face mem
23. In a device for vacuumizing and gassing
ber.
cans of commodities with the lids resting there
19. In a device for vacuumizing and gassing
on, an elongated chamber adapted to hold a plu
?lled cans with the covers resting on said cans, a
rality of cans, said chamber being open at both
chamber into which the cans are to be placed, 35 ends, means for air sealing said open ends, ways
means for sealing said chamber, means for tilt
extending longitudinally through said chamber
ing the can lids and a laterally movable member
upon which the cans are slid into and out of said
within said chamber? having a bevelled nose to
chamber, a longitudinally disposed bar sup
wedge beneath the lids to raise and support one
ported in the upper portion of said chamber and
side thereof, and means actuated from without
parallel with said clamping and tilting means for
said chamber for operating said laterally movable
exerting yielding pressure on the edges of the lids
member.
at one side thereof during the vacuumizing and
20. In a device of the class described a chamber
gassing periods, means operable from without
adapted to receive a can containing a substance
said chamber for raising and lowering said clamp
to be treated with the lid for said can resting in
ing and tilting means, and means also operable
place thereon, a plunger adapted to be moved into
from without said sealed chamber for actuating
engagement; with saidvlidiand normally tending
said bar to ?rmly engage the edges of the lids at
to tilt the lid while in engagement therewith, a
points diametrically opposite from the clamping
vertically reciprocable presserrbar adapted when
and tilting means during the vacuumlzing period,
in a lowered position to assist said plunger in 50 to raise the bar at the beginning of the gassing
holding the lid in a closed but not air sealed po
period and to lower the bar into position prior to
sition on the can and when raised to permit the
unseallng the chamber, to prevent displacement
plunger to tilt the lid, and means for raising and
of the lid when the cans are being removed from
lowering the plunger and bar, said bar, being so
the device,
disposed in the chamber and 01? such length as to 65
HERBERT L. MINAKER.
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