US1211266A - Can closing and exhausting machine. - Google Patents

Description

L. WURZBURG.

CAN CLOSING AND EXHAUSTING MACHINE.

APPLICATION HLED SEPT. 2. 1915.

1,211,266. Patented Jan. 2,1917.

E: V cuum L. WURZBURG.

CAN CLOSING AND EXHAUSTING MACHINE. v

APPUCATION men SEPT-2,1915- 1,21 1,266. I Q Patented Jan. 2,1917.

4 SHEETS-SHEET 2.

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lniinrssrs L. WURZBURG. -CAN CLOSING AND EXHAUSTING MACHINE.

APPLICATION HLED SEPT-2,1915.

Patented Jan. 2, 1917.

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L. WURZBURG. CAN CLOSING AND EXHAUSTING MA CHINE.

APPLICATION FILED SEPT-2,1915- Patented- Jan. 2, 1917.

4 SHEETS$HEET 4- IlIiIuvssrs LUIDWIG WURZBURG, 0F IBELLINGHAM, wesnmeron.

CAN CLOSING AND EXHAUSTING MACHINE.

Specification of Letters Patent.

Application filed September a, 1915. Serial No. 48,741.

To all whom it may concern: I

Be it known that I, LUDWIG WURZBURG, a subject of the King of Great Britain, residing at Bellingham, in the county of Wha-tcom and State of Washington, have invented certain new and useful Improvements in Can Closing and Exhausting Machines; and I do hereby declare the following to be a full. clear, and exact description of the invention, such as will enable others skilled in the art'to which it appertains to makeand use the same. I

This invention relates to head seaming devices for can closing machines, and more especially to those having rotating upper dies with external seamers; andthe object of the inventionis to provide such'machine with means whereby the seaming is done in a hermetically closed chamber, the, same being formed within a two-part hood whose parts or sections are brought together to inclose the seaming mechanism and the upper portion of the can by means which are actuated automatically when a can is fed onto the table but are not actuated when no can ispresent.

The following specification describes in detail my preferred manner of applylng thls' invention to a so-called stationary machine, and the drawings omit the can feeding mechanism and the can ejector as these devices are not always employed in this type of machines. The last two figures of the drawings show diagrammatically the appli-- cation of this invention to a so-called rotary machine. y

In said drawings: Figure 1 is a side elevation of the complete exhausting device of the closing machine, and Fig. 2 a plan view thereof, with parts in section. Fig. 1s a vertical section on the line 3-3 of Fig, 2, and Fig. 4 another section on the line 44 of 'Fig. 2. Fig. 5 is an enlarged sectlonal detail on the line 55 of Fig. 2, and Fig. 6

a section on the line 6-6 of Fig, 5 Fig. 7 is an enlarged detail in plan view of the table and trip, and Fig. 8 a perspective de-' tail of the trip detached. Fig. 9 is a detail of the bell crank lever mechanism, being a view looking from the point indicated by the arrow 9 in Fig. 1. Fig. 10 is a perspect ve detail'of the drum support on an enlarged scale. Fig. 11 is an enlarged sectional detail taken on about the line 1111 of Fig. 3,

showing also in section how the bottom flange of the hood-sections can be wldened to produce a smaller hole which will accom- Patented Jan. 2, 191a.

modate a smallercan. Fig. 12 is a diagram matic plan'view showing the'adaptation of this invention to another form of canning machine, and Fig. 13 is a perspective detail illustrating a modification of the rocking beam or lever which will be adopted in this case.

I have employed reference letters to designate certain standard parts as employed in most ofthe canning machines now in general use, and no novelty is claimed for such parts. The letter P designates the platform having a table T, raised and lowered by means diagrammatically indicated at R in Fig. 3, and in Fig. 12 the reference P designates the platform and T the table, the latter supporting the can C. Above the v platform is the seaming. mechanism whereof it will be necessary for the purposes of this specification to refer only to the cylindrical shank of the head H and the seamers S carried by such head, and the letter D designates the driving mechanismwhich is 0on nected by means not necessary to show with the seaming mechanism and withthe moving parts of my machine.

The purpose of this invention is to exhaust the air from the cansbefore closing them hermetically with the caps, and in order to do so it is quite obviousthat the head andthe seamers must be housed along with the upper end of the can within a chamber from which'the air-can be exhausted at the proper moment; and yet theparts or sections of this chamber must be open when the can is introduced, and must again be opened to remove the sealed can and permit the introduction of the next can rea'dy for sealing. In order to carry out this broad object and yet to adapt the machine toact on cans of various sizes, I preferably make use of the construction which I will now de-.

scribe in detail although the parts may have to be changed slightly to adapt them to the various seaming" machines on the market.

from the plate are four rods 3 which are ren-z dered vertically adjustable by nuts 4 above and below the plate, and pinned'to the lower- 1 ends 1 h rods are blocks 5 which carry" two parallel guide rods 6 extending alongside the hood yet to be described and in substantial parallelism with the direction of movement of the cams which latter enter from the left as shown by the arrows in The hood as best seen in Figs. 3 and 11 is made up of these two sections 9- which are semi-cylindrical, their edges 9 standing perhaps a half inch apart, and each section has its upper end reduced and provided with one half of a cylindrical neck 10 lined internally with rubber or other packing 10' so that it will make an air-tight juncture with the wall of the stuffing box 2 when the sections are brought together. Each section carries at its lower end one-half of an internal flange 11 which around its inner edge is provided with rubber or other packing 11, preferably secured thereto by a dovetail joint as seen in Fig. 11, and this packing isadapted to make an air-tight juncture with the wall of the-can C when the sections are brought together. To operate on a smaller can, a wider flange '11 might be secured beneath the flange l1, and its packing would contact with the wall of a can of smaller circumference; and at that time a proper head H and seamers S would of course be employed. To operate on a can of less height than shown in the drawings, a head H would have to be employed whose seamers S stand lower; and in order to permit these adaptations of the machine the 'entire hood will be made large enough to contain the head and seamers for the largest can ever to be handled.

Mounted on the table T at one side of the path of the can is a guide 12 as best seen in Fig. 7, and pivoted at 13 to the other side 'of the table is a trip 14 borne by a spring I 15 normally into contact with a stop 16.

Carried by the free end of the trip is a finger 17 projecting horizontally beyond the table and standing under a fork 18 at the lower end of a rod 19 as best seen in Fig.- 1. This rod slides vertically through a guide 20 on an arm 21 carried by a block 22 which is adjustably mounted by a set screw 23 on ,a standard 24 rising from the table, and its upper end is connected with a beam or rock lever 26 by means of a pin 27 engaging a slot 28 therein. The beam is pivoted or fulcrumed as at 31 in the upper end of the standard, and its inner arm is normally dopressed by a spring 29 bearing on a pin 30,

so that its outer arm rises against the stop 32. Said outer arm is pivoted at 33' to a bell crank lever as best seen in Fig. 9, such lever bemg pivoted at 35 to the upper which in turn is pivoted to a swivel mechanism also shown in this view and whose details will be described later; and this mechanism connects the link with a shaft 37 rotatably and slidably mounted in'bearings 38.

Power from the driving mechanism D is communicated to a driving gear 39 which is preferably spring pressed as shown at 40, and the shaft 37 carries a driven gear 41 adapted to be engaged with the driving gear 39 when this shaft is projected through its bearings 38 by movement of the bell crank lever. The shaft carries a pair of cams 45 in position to engage rollers 46 journaled in the rear ends of push rods 47 which latter are preferably telescopic as will be presently described, and the inner end of each push rod is pivoted at 48 to the lower end of a crank 49 whose upper end is keyed on a shaft 50 which is journaled in a block 51 mounted on and upstanding from the mid-length. of the guide-rod 6. Fast on the shaft 50 is a drum 52, and from pins 53 at top and bottom thereof lead tapes 54 whose outer ends are connected with ears 7' rising from the blocks 7. Between the latter and the intermediate block 51 expansive springs 56 are coiled around the rod 6, and they serve to hold said movable blocks 7 normally in contact with the fixed blocks 5 at the lower ends of the rods 3. Thus it will be seen that when the push rod 47 is moved inward the crank 49 turnsthe drum and its tapes draw the blocks 7 inward simultaneously, and as these blocks carry the hood sections 9 the latter are brought together,

The push rod may be made telescopic as 'best seen in Fig. 4, and if so its outer end has a head 58 moving in a tube 57 against an expansive spring 59, the rod also having a pin 60 moving in a slot 61 in one side of the tube to prevent the latter from becoming entirely disengaged fromthe rod. The tubular section may well be supported on a rest 62 and within a loop 64, and its outer end is forked as at 63 for the reception of the roller 46. The springs 59 should be of greater strength than the springs 56, but if for any reason the hoodsections do not come together when the cam 45 descends the springs 59 will yield to prevent fracture of parts.

Fast on the shaft 37 is a mutilated gear 66 whose blank space is indicated by the numeral 67 and the valve is actuated by another gear 68 standing in position to be engaged by the gear 66 when the shaft is moved by the mechanism above described so that the driven gear 41 is engaged by the driving gear 39. The valve 69 (best seen in Figs. 3, 5 and 6) has a longitudinal bore 70 and a radial port 71. The valve is so mounted within its casing 77 that the port comes opposite a slot 72 which communicates with the chamber 73, the latter in turn communicating through a flexible tube 7 4 With a vacuum tank not shown; and at another point in the rotation of the valve the port comes opposite a slot 75 which communicates with the open air. This last communication is maintained while the port rotates from the point A to B, then the valve is closed until the port reaches the point C, then the port is in communication with the vacuum until it reaches the point D, and finally the valve is closed until the port reaches the point A of starting. The valve (39 is preferably made tapering as seen in Fig. 3, and is held within its casing by a pin 78 engaging a groove 79. The hub of the gear 68 is mounted on a stub shaft 80 which is screwed as at 81 into the outer end of the valve plug. The casing 77 projects from and opens through a plate 83 which is connected with and supported by one of the hood sections as shown, and the bore of the valve communicates with the interior of the hood.

To prevent the shaft 37 from rotating by momentum after its gear 41 is disengaged from the driving gear 39, a pin 84: projects from one of the bearings 38 as best seen in Fig. 2, and is engaged by a pin 85 projecting from or carried by the shaft 37. IVhen the latter is moved. by the rock lever the pin 85 passes beyond the tip of the pin 84 which latter tapers toward its point as shown.

The swivel connection between the shaft 37 and the upright arm of the bell crank lever 33 may be any that will operate successfully at this point, but by preference I employ that best seen in Fig. To the end of the shaft 37 is secured a disk 87, and this disk rests against another disk 89 whose edge is screwed into a cupped collar 88 mounted loosely on the shaft. The disk 89 has a pair of ears 90 between which the link 36 is pivoted as seen, or it may have a single ear 90 pivoted directly to the upright arm of the bell crank lever as in Fig. 13.

The adaptation of my invention to a so called rotary machine necessitates but trifling changes and is shown in Figs. 12 and 13. Here the can C follows the course indicated bv the arrows and after having been capped oh the table T is thrown off the same by the ejector E. The trip 14 is pivoted at 13' to a corner of or a projection fromv the table and pressed norn'lally into the path of the can by a spring 15. Its free end carries .the finger 17 which projects beneath the inner end of the beam :26 and rocks the latter on its pivot 31 when the table rises as described above. The outer end of this beam may be. deflected slightly as shown at 26" in order to adapt it to this type of machine, but it is pivoted at 33 to one arm of the bell crank lever 33 and the action is the same as that of the beam 26 described above. The free end of the trip now preferably carries :1 depending pin 16' moving in a slot 16" in the table to limit the inward movement of the trip, but I prefer this construction only because an upright stop as seen in Fig. 7 might stand in the path of the can.

IVith a machine constructed substantially as described. the operation is as follows: The can is fed over the platform P from the left as seen in most of the views, and passes onto the table T. In doing so it entersbetween the guide 12 and trip 14; of Fig. 7 or is carried around between the ejector E and trip 11 of Fig. 12. In either case the movement of the. trip projects the finger 17 or 17, and thereafter when the mechanism R raises the table and the can the finger tilts the beam 26 or 26 against the tension of its spring 29. The descent of its outer end depresses the horizontal arm of the bell crank lever 38, and its upright a rmthrough the swivelslides the shaft 37 in its bearings 38 and engages the gear :1 with the driving gear 39, which latter is constantly revolving. All this takes place if the can has moved onto the table and the latter is raised, but if the table should rise without there being a can upon it the finger is of course not projected and the shaft 37 not thrown into action. The longitudinal movement of this shaft disengages the pins 8 and 85 so that it is free to rotate and it also brings the cams 45 into line with the rollers 16. Now when the shaft commences to rotate as shown by the arrow in F ig. 2 said cams strike the. rollers and project the push rods i7whether the latter have the telescopic feature or not. The inner ends of these rods which are pivoted at &8 to the cranks 49, now swing the latter and oscillate the drums 52 which, through the tapes 51, draw the hood-sections 9 toward each other. The inner edges" of their flanges 11 are thus brought into close contact with the body of the can C, and the packing 11 makes a. close fitaround it; the meeting edges 9 of the sections also come into contact with each other, and as they are packed a close fit is made along the sides of the hood; and the meeting ends of the neck sections 10 come into close Contact with each other, while the packing 10' on their inner faces closely contacts with the stuiiing box 2. The cams 45 hold the parts in this position while the mutilation 67 is passing the gear 68, and next the teeth 66 engage said gear and the valve ('30 is turned as shown by the arrow'in Fig. 5. As soon as the vacuum tank or suction means connected with the hose 74 is thrown into communication with the bore 70 of this valve, air is exhausted from within the hood and therefore from Within the can whose cover is at this time not sealed; and the sealing operation is eflec"' d by well-known means, but While the vacuum is maintained. The result is that a much finer product is canned than that which is treated to superheated steam prior to hermetically closing the can. It Will be observed from the shape of the cam 45 and the mutilation 67 that the shaft 37 makes two complete revolutions during the sealing of the can, and this I prefer although it is possible to give other shapes to parts so that only a single revolution of this shaft is necessary. During the first revolution the teeth 66 turn the valve from the position shown in Fig. 5 to a position where its port 71 connects with the chamber 73, and now the hood sections are drawn together by the contained vacuum and held together by external atmospheric pressure. During the second revolution of the shaft the teeth 66 turn the valve from this position back to the point of starting, and as soon as its portcommunicates at all with the slot 75 which opens to the air, the vacuum is broken and the hood sections are parted under the influence of the spring 56. Meanwhile the cams 45 may have rojected the push rods 47 and turned the crums 52 a second time, but no harm results.

As soon as the vacuum is brdken and the hood-sections are restored to the position shown in the drawings, mechanism (not shown) permits the descent of the table T with the sealed can, and as the finger 17 then ceases to support the inner end of the beam 26 the latter is tilted back to normal by the spring 29. Its outer arm now actuates the bell crank lever 33, and the shaft 37 is slid back through its bearings 38 to the point of starting, the pins 85 and 84 coming into contact to prevent the shaft from rotating under momentum. The sealed can is now in position to be taken off the table by hand or otherwise, and if my invention is applied to a machine of the type indicated in Fig. 12, the sealed can will be automatically carried forward and ejected by the element E.

What I claim is:

1. In a can closing machine, the combination with the table, the head and seaming mechanism, and means for altering their relative positions and sealing the can; of a hood composed of movable sections and defining a chamber inclosing said mechanism and the upper part of the can hermet ically when the sections are brought together, means for exhausting air from such chamber prior to the sealing of the can, and mechanism actuated by the insertion and rise of the can for controlling said exhausting means.

2. In a can closing machine, the combination with the table, the head and seaming mechanism, and means .for altering their relative positions and sealing the can; of a hood composed of movable sections and defining a chamber inclosing said mechanism and the upper part of the can hermetically when the parts are brought together, means for exhausting air from such chamber prior to the sealing of the can, and mechanism controlled by the insertion and rise of the can on the table for first forcing the sections of the hood together and then controlling said exhausting means.

3. In a can closing machine, the combination withv the table, the head and seaming mechanism, and means for altering their relative positions and sealing the can; of a hood composed of two movable parts and defining a chamber inclosing said mechanism and the upper part of the can hermetically when the parts are brought together, a conduit leading from said chamber to a source of air exhaust, a valve in said conduit for establishing communication between the chamber and exhaust or between the chamber and the open air, mechanism controlled by the insertion and rise of the can for forcing the parts of the hood together, and connections between said mechanism and valve for actuating the latter after the hood has been closed.

I. In a can closing machine, the combination with the table, the seaming mechanism, and means for altering their relative positions and sealing the can; of a hood composed of two movable parts and defining a chamber inclosing said mechanism and the. upper part of the can hermetically when the parts are brought together, a conduit leading from said chamber to a source of air exhaust, a valve in the. conduit for establishing communication between the chamber and exhaust or between the chamber and the open air, a shaft having cams, means actuated by said cams for forcing the parts of the hood together, connections between the shaft and valve for actuating the valve by the rotation of the shaft, and mechanism actuated by the insertion and rise of the can for starting the rotation of the shaft and by the descent of such can for checking its rotation.

5. In a can closing machine, the combination with the table, the seaming mechanism, and means for altering their relative positions and sealing the; can; of a hood composed of two movable parts and defining 'a chamber inclosing said mechanism and part of the can hermetically When the parts are brought together, a source of air exahust, a valve for establishing communicationbetween the chamber and exhaust or between the chamber and the open air, a shaft ro tating and sliding in its bearings and having adriven wheel, a driving wheel with which said driven wheel engages when the shaft is moved longitudinally, mechanism M actuated by the insertion and rise of the can for so moving the shaft to engage the driven with the driving wheel and by the descent of the can for throwing said wheels out of engagement, cams fast on the shaft, means for closing the hood-sections including push rods with which said cams aline when the shaft is thrown into action, and connections between the shaft and valve for rotating the latter from the former.

6. In a can closing machine, the combination with the table, the seaming mechanism, and means for altering their relative positions and sealing the can; of. a hood composed of two movable parts and defining a chamber inclosing said mechanism and the can hermetically when the parts are brought together, a source of air exhaust, a valve including a plug having openings for establishing communication between the chamber and. exhaust or between the chamber and the open air, a shaft rotating and sliding in its bearings and having a driven wheel, a driving wheel with which said driven wheel engages when the shaft is moved longitudinally, mechanism actuated by the insertion and rise of the can for so moving the shaft to cause the engagement ofsaid wheels and by the removal of the can for throwing said wheels out of engagement, cams fast on the shaft, means for closing the hoodsections including push rods with which said cams aline when the shaft is thrown into action, a gear on the valve plug, and a mutilated gear on the shaft at a point to engage the first-named gear when the shaft is thrown into action.

- 7. In a can closing machine, the combination with the seaming mechanism including a head having a cylindrical shank, and a vertically .movable table beneath said head; of a hood composed of two separable and movable sections and defining a chamber inclosing the head and the body of the can, each hood-section having at its upper end one-half of a neck having internal packing adapted to hermetically inclose said shank and at its lower end one-half of an inturned flange having packing around its inner edge to contact hermetically with and inclose and grip the body of the can, and means for exhausting air from said chamber.

8. In a can closing machine, the combination with the seaming mechanism including a head having a cylindrical shank, a stuffing box surrounding said shank, and a vertically movable table beneath the head; of a two-part hood defining a chamber inclosing the head and the upper part of the can, the meeting edges of the parts being packed for contact with each other, the upper ends of the parts being shaped and packed for contact with said stufling box, inturned flanges carried by the lower ends of said parts packed on their edges for contact with cans, means for moving the parts into contact with each other, and means for exhausting .air from said chamber.

9. In a can vacuumizing and seaming machine, the combination with the platform, and table, an overhead plate having a depending stufling box, the seaming mechanism including a head whose shank extends through said stuiiing box, and means for raising the table at intervals; of'four rods hanging from said plate, guide rods connecting their lower ends in pairs, a two-part hood whose sections are slidably mounted on said guide rods and packed to hermetically inclose said stuffing box, head, and the upper portion of the'can, means controlled by the insertion and rise of the can for forcing said parts together, and means for exhausting air from the hood.

10. In a can vacuumizing and seaming machine, the combination with the platform and table, an overhead plate having a'depending stuffing box, the seaming mechanism including a head whose shank extends through said stufling'box, and means for raising the table at intervals; of four rods hanging from said plate, guide rods connecting their lower ends in pairs, a two-part hood whose sections are slidably mounted on said guide rods and packed to hermetically inclose said stufling box, head, and the upper portion of the can, springs on said guide rods for normally separating the parts, means for exhausting air from the hood, a rotary element, devices thereon for overcoming the springs and closing said parts and for turning on and then turning off the air exhaust, and means actuated by the insertion and rise of the can for starting the rotation of said element.

11. In a can vacuumizing and seaming machine, the combination with the platform and table, an overhead plate having a depending st'uifing box, the seaming mechanism whose shank extends through said stuffing box, and means for raising the table at intervals; of supports depending from said. plate, guide rods connecting them in pairs, a two-part hood whose sections are slida-bly mounted on said rods and packed to hermetically inclose said mechanism, and the upper portion of the can, springs on said guide rods for normally separating the parts, means for exhausting air from the hood, a rotary element, devices thereon for overcoming the spring and closing said parts and for turning on and then turning ofl the air exhaust, a trip movably mounted on the table and spring pressed into the path of a can being passed thereon, a source of power, and means actuated by said trip and the rise of the table for throwing said element into connection with the source of power and starting its rotation.

12. In a vacuumizing device for cans, the

combination with a platfori'n, a vertically moving table therein, an overhead plate, four rods hanging therefrom. guide rods connecting them in pairs, and a two-part hood whose parts have blocks slidably mounted on said guide rods; of intermediate blocks fixed on the guide rods, expansive springs coiled on the. latter between the intermediate and the sliding blocks, drums journaled on said intermediate blocks, tapes extending from the top and bottom of each drum to the respective members of a pair of the sliding blocks, means for rotating the drums in unison to close the parts of the hood on the can, and means for exhausting air from the hood.

18. In a vacuumizing device, the combination with avertically moving table, an overhead plate, guide rods supported thereby in pairs, and a two-part hood whose parts have blocks slidably mounted on said rods; of intermediate blocks fixed on the rods, expansive springs coiled on the latter between the intermediate and the sliding blocks, drums ournaled on said intermediate blocks, tapes extending from the top and bottom of each drum to the respective members of a pair of sliding blocks, cranks fast to the drums, push rods connected at one. end with said cranks, a shaft across their other ends, cams thereon, means for exhausting air from the hood, and devices for controlling said exhausting means actuated by the rotation of said shaft.

1 In a vacuumizing device, the combination with a moving table, a pair of guide rods, and a two-part hood whose parts have blocks slidably mounted on said rods; of intermediate blocks fixed on the rods, expansive springs between the intermediate and the sliding blocks, drmns journaled on said intermediate blocks, tapes extending from the top and bottom of each drum to the respective members of a pair of sliding blocks, cranks fast to the drums, a two-part push rod whereof one part has its outer end connected with each crank and the other part has a roller in its outer end, an expansive spring distending the parts with a force greater than that of the springs on the guide rods, a stop for preventing the complete separation of the parts, a shaft having cams adapted to engage said rollers, means for exhausting air from the hood, and devices for controlling said exhausting means actuated by the rotation of said shaft.

15. In a can handling machine, the combination with a two-part hood, means for closing its parts around the can. a table for raising the can into position to be inclosed, a longitudinally movable shaft having cams adapted to be brought into position to engage said closing means, and means for r0- tating the shaft; of a trip pivoted on the table and carrying a finger, a vertically movnausea able rod having a fork standing over and engaged by the tip of the finger when. the latter is projected by the presence of a can on the table, a beam rocked by the rise of said rod, and connections between the beam and shaft for moving the latter when the beam is rocked.

16. In a can handling machine, the combination with a two-part hood, means for closing its parts around the can, a table for raising the can into position to be inclosed, a longitudinally movable shaft having cams adapted to be brought into position to engage said closing means, and means for rotating the shaft; of a trip pivoted on the table and carrying a finger, a vertically movable rod standing over and engaged by the tip of the finger when the latter'is projected by the presence of a can 011 the table, a beam centrally supported and having its inner end connected with said rod, a swivel at one end of said shaft, and a lever connecting the swivel with the other end of said beam whereby the rocking of the beam slides the shaft. for the purpose set forth.

17. In a can handling machine, the combination with a two-part hood, means for closing its parts around the can,a table for raising the can into position to be inclosed, a longitudinally movable shaft having cams adapted to be brought into position to engage said closing means, and means for rotating the shaft; of a trip pivoted on the table and carrying a finger, a vertically movable rod having a fork standing over and engaged by the tip of the finger when the latter is projected by the presence of a can on the table, a standard rising from the platform, a beam centrally pivoted in said standard and having its inner arm connected with said rod, a spring normally depressing this arm, another standard rising from the platform, a bell crank lever pivoted at its angle in this standard and having one arm pivotally connected with the outer arm of said beam, a swivel on the shaft, and a link connecting the remaining arm of the bell crank lever with said swivel.

18. In a vacuumizing device for cans, the combination with a platform, a vertically movable table therein, a two-part hood whose sections are movably mounted above said table, means for closing the parts together to define a chamber inclosing the upper part of the can, a pipe leading from said chamber to a source of air exhaust, a rotary valve within the length of said pipe. whose casing has a slot opening to the air and Whose plug has a port passing said slot during its rotation, and a gear connected with said plug; of a shaft rotating and sliding in its bearings, means for sliding the shaft when a can is passed onto said table, cams on the shaft adapted when it is slid to move in the path of the hoodclosing means, and a mutilated gear on the shaft adapted when it is slid to move into engagement with the gear on said valve.

19. In a vacuumizing device for cans, the combination with a platform, a vertically movable table therein, a two-part hood whose sections are movably mounted above said table, means for closing the parts to define a chamber inclosing the upper part of the can, a pipe leading from said chamber to a source of air exhaust, a rotary valve within the length of said pipe whose casing has a slot opening to the air and whose plug has a port passing said slot during its rotation and a gear connected with said plug; of a shaft rotating and sliding in its bearings, means for sliding the shaft when a can is passed onto said table, cams on the shaft adapted when it is slid to move in the path of the hood-closing means, a mutilated gear on the shaft adapted when it is slid to move into engagement with the gear on said valve, a pin in said shaft and another pin in one of its bearings of a length to be disengaged by the first pin when the shaft is slid through its bearings, a beveled driven gear on said shaft, and. a beveled spring-pressed driving gear on a power shaft adjacent thereto and with which the driven gear is engaged when the shaft is slid.

20. In a can handling machine, the com bination with a two-part hood, means for closing its parts around the can, a table for raising the can into position to be inclosed, a longitudinally movable shaft having cams adapted to be brought into position to engage said closing means, and means for r0- tating the shaft; of a trip pivoted on the table, a standard rising from the platform, a beam centrally pivoted insaid standard and having its inner arm standing over the tip of the trip when the latter is projected by the presence of a can on the table, a

spring normally depressing this arm, another standard rising from the platform, a bell crank lever pivoted at its angle in this standard and having one arm pivotally con nected with the outer arm of said beam, a swivel on the shaft, and connections between the remaining arm of the bell crank lever and said swivel.

21. In a can closing machine, the combination with the table, the closing mechanism, a hood defining a chamber inclosing said mechansm, and means for altering the relative positions of the table and hood to project a can into the latter; of means for exhausting air from such chamber prior to the closing of the can, and mechanism controlled by the insertion of the can on the table andthe rise of both the table and can for actuating said exhausting means.

22. In a closing machine for cans and the like, the combination with a support, a closing mechanism, a hood defining a chamber inclosing said mechanism, and means for altering the relative positions of the support and hood, of means for exhausting air from such chamber prior to the closing of the can, and mechanism controlled by the insertion and rise of the can for actuating said exhausting means.

23. In a closing machine for cans and the like, the combination with a support and closing mechanism; of a hood made up of movable sections, and means for moving the sections to grip the can body and to form an air-tight chamber whose walls are made up of said hood and a portion of the can and inclosing said closing mechanism and a part of the can to be closed.

In testimony whereof I affix my signature in presence of two witnesses- LUDWIG W'URZBURG. Witnesses:

H. S. Bnooxs, J D. ROCKEY.

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