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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 4 Sheets-Sheet 1 /' o ? 18 20 29/ .?3hr; hm? I? .24? ea? ' ? � v16 I? ? ?� ? L 0 ?a? /�731J ' 17 *195 86� <94?? 66? a? a? +3 131 68 (94', <96? LN 24 ? ? � O ? ? J6 1| ?2'? / ? ? O a. HLMnah?en ..> 1 B: t , MMBJM Dec. 3, 1946. H. L. MINAKER ? 2,412,167 METHOD? AND MEANS FOR VACUUMIZING AND GASSING FILLED CONTAINERS Filed April 17, 1944 ?& EL \\ \ \ r 4 Sheets-Shee?t 3 / awuq/wtom ?JLLMinaRer. ~92? 7%?, 65122;; Am? a S Dec. 3, 1946. H, |_, WNAKER 2,412,167 METHOD AND MEANS FOR VACUUMIZING AND GASSING FILLED CONTAINERS Filed April 17, 1944 <__ w 4,6 \ \? r 4 Sheets-Sheet 4 <? ?f2 4134'? ' / / 4.9 1? 41 J9 . ? a6? 36 ? (24� � J(, L. Minafcer 33"" WM?KAQILWFI. 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.