US1604281A - Heat-insulated can and the like - Google Patents

Description

Oct. 26 1926.

G. B. HAINES HEAT INSULATED CAN AND THE LIKE Original Filed July '7. 1921 2 Sheets-Sheet 1 iv J0 Oct; 26 ,-192e.

G. B. HAINES HEAT INSULATED CAN AND THE LIKE Original File uly 7; 1921.

jzfevzzmi' Nl'l'ED f res GEORGE B. HAINES; OF CHICAGO, ILLINOIS; MARJORIE HAINES IBIGELOW' ADMIN- ISTRATRIX OF SAID GEORGE B. HAINES, DECEASED.

HEAT-INSULATED CAN AND THE LIKE.

Application filed July 7, 1921, Serial No. 482,922. Renewed March 12, 1926.

The present invention has to do with certain improvements in heat insulated cans such as vacuum cans and the like. These devices are used for heat insulating con- ;tainers, the vacuum space when used serving as a very efiicient heat insulator.

. One of the features of the invention has to do with certain improvements in vacuum containers made of sheet metal and the like as distinguished from glass or other brittle material. In this connection one of the objects of the invention is to provide a container made up from a relatively small number of metal sheets joined together with relatively few seams. This will reduce the cost of manufacture, as well as reducing the number of points at which air leakage may take place. In this connection another object of the invention is to so form and relate the metal sheets to each other that the seams may be veryeasily formed and may be very efficiently joined. Another object is to provide seams of such form that they may be readily welded or brazed or both Without difliculty.

Another feature of the invention relates to the provision of a construction in which special means are provided for continuously taking up any relatively small amount of moisture which may seepinto' the vacuum space so as to maintaina very dry vacuum. This is desirable for the reason, among others, that a very small amount of free moisture within the vacuum space will very .materially deteriorate the vacuum and destroy the insulating qualities of the space.

Another feature of .the inventionrelates to the provision of means for carrying a 'heating or cooling body within the chamber, said body being preliminarily heated when the container is -to receive hot material, and being preliminarily cooled when the container is to receive cold material. Inthis connection another object is-to support said body when used either at the top when the container is to receive cold material, or at the bottom when it is to receive hot material.

Another feature of the invention has to do with the provision of special and very efficient sealing means at the point where the closure seats into the upper end of the container so as to efficiently seal against the flow of heat at this point. In this connection a further object-is to provide a double seal at this point so as to doubly prevent the transfer of heat. Another obJect of the invention is to provide a container of very great mechanical strength and durability combined with simplicity and cheapness of manufacture.

Other objects and uses will appear from a detailed description of the same, which consists in the features of construction and combinations of parts hereinafter described and claimed.

In the drawings:

Figure 1 shows a vertical section through a container embodying the features of the present invention;

Fig. 2 shows a cross section taken on line 2-2 of Fig. 1 looking in the direction of the arrows;

Fig. 3 shows a cross section taken on line 33 of Fig. 1 looking in the direction of the arrows;

Fig. 4 shows a vertical section through a modified form of containerembodying the features of the present invention, the same taking the appearance more nearly of a bottle or ar;

Fig. 5 shows a section taken on line 5-5 of Fig. 4 looking in the direction of the arrows;

Fig. 6 shows a fragmentary section through the bottom portion of the modified form of container embodying the features of the present invention; and

Fig. 7 shows a fragmentary vertical section through the bottom portion of still another modified form of container.

I will first state that this application, as to certain of the features herein shown and described, is a continuation in part of my co-pending application, Serial No. 371,835, which was filed April 7, 1920.

The construction shown in Figures 1, 2 and 3 is substantially the same as that of the vacuum container shown and described in the aforesaid parent application. It includes inner and outer shells 10 and 11 respectively, said shells consisting of metal. sheets bent into cylindrical form and brazed. together on the vertical seams 13 and 14:. The outer shell, being subjected to full atmospheric pressure, may be provided with a series of encircling beads 15 located at various points in its height so as to rein-- force it against collapsing. In addition it may also be provided with one or more encircling rings of T-shape cross section 16,

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which may be brazed or welded to the sheet 11 and further assist in resisting the collapsing force of the air, and also serve as handle supports.

A bottom head 17 has its edge portion 12-, flanged downwardly and set snugly against the lower edge portion 19 of the outside sheet 11. The portions 18 and 19 may be readily welded or brazed together to produce a perfectly air tight. connection. A series of encircling ribs 20 may be formed in the. bottom sheet 17 so as to strengthen the same against collapsing.

The inner sheet 10, being subjected to a tensile force under atmospheric pressure, does not require to be reinforced against collapsing. A bottom' sheet 21, having its peripheral portion 22 flanged downwardly, is seated within the lower portion 23 of the sheet 10, the portions 22 and 23 being brazed or welded together in manner similar to the portions 18 and 19 of the outside sheets.

If desired, a series of reinforcing ribs 24 may be formed in the bottom sheet 21 so as to reinforce the same against collapsing. I The upper portion of the inner shell 10 is flared outwardly, as shown at 25, to meet the upper edge 26 of the outer shell, and the edge 27 of the inner shell is then curved over snugly against the edge 26 and these two edges are brazed or welded together.

The outward flaring of the upper portion 25 of the inner shell 10 not only serves to bring together the upper edges of the inher and outer shells but also serves to provide a beveled seat for' reception of the I closure for the container.

The closure shown in the drawing includes lower and upper sheets 28 and 29 respectively. The lower sheet has its peripheral portion 30 flared upwardly and outwardly to seat snugly against the flared portion 25 of the sheet 10, and the edge portions 31 and 32 of the lower and upper sheets are brought together in the manner shown in Fig. 1, so that they can be readily brazed or welded. If desired, beads may be formed in both of these sheets so as to reinforce them against collapsing.

In order to improve the sealing action of the closure I have illustrated an outwardly flaring lip 33 on the inside sheet 10 around the point where the outward flare 25 com mences. A gasket 34 of rubber or other similar material is set in against the lip 33 in position to be engaged by a bead 35 which reaches downwardly around the periphery of the closure. If desired, a gasket 36 may be seated between the closure and the upper portion of the container so as to seal the joint at that point also. The use of two gaskets 34 and 36 at the lower and upper edges of the closure seat efiectively prevents the flow of heat along said seat so as to improve the heat insulation quality.

The container illustrated in Figs. 1, 2 and 3 may be of relatively large size, such as five to twenty-five gallons capacity, or larger. A container of this size will be quite heavy, particularly when filled, and I ha-ve'therefore illustrated means for protecting its lower edge against dama e when the container stands thereon. For t is urpose I have shown a ring 37 surroun ing the lower ed e of the container, to which it may be welded or brazed, said ring projecting a suitable distance below the lower edge. If desired, a bottom sheet 38 may be secured to the ring 37 so as to facilitate stacking the contalners one on top of the other in shipment or at other times, and also to protect the sheet 17 from direct blows.

Within the vacuum space between the shells 10 and 111 have illustrated a ring shaped member 39 held in lace on the bottom sheet 17 by a series 0 clips 40. This ring shaped member, when used, is for the purpose of carrying powder 01' other material of a highly hygroscopic nature, such as corn starch, which will take up any free moisture finding its way into the vacuum space, and thus greatly improve the heat insulating efliciency.

The vacuum in the space between the shells 10' and 11 may be established in any convenient manner, as by means of the vacuumizing device disclosed and claimed in the aforesaid parent application. When this is done the hole through which the air is withdrawn may be sealed by means of a drop of solder 41 or the like, and a similar sealing drop 42 is shown in the sheet 28 of the closure for the container.

If the container illustrated in Figs. 1, 2 and 3 should be used as an icer or for cold beverages, a faucet 43 may be provided, having the stem 44 reaching across the vacuum spaceand into the material compartment. This stem should be sealed in an air tight manner to both of the shells.

If the container should be used for the shipment or storage of material such as ice cream or the like, a can 45 may be set into the material compartment. This can, when used, may be seated on a ring 46 which may rest 'on an inturned head 47 around the lower portion of the inner shell 10 so as to carry the weight of the can 45 and its contents directly by the shell 10 and without having to transfer such weight through the brazed or welded connection between the flanges 22 and 23. In case the inside surface of the material compartment should be tinned or otherwise rotected, the ice cream or other food could e placed directly therein without the use of the can 45.

In order to revent any free circulation of air within the container and around the can 45, I have shown a circular gasket 48 0f rubber or the like wedged in between the upper portion of the can and the inside shell of the container. This gasket should be of triangular cross section as shown in Fig. 1, so that it may be readily wedged into place.

I have shown a block 49 of soap stone or other material immediately beneath the closure, which block may be supported from the closure by means of a series of hooks 50 pivoted to the bottom portion of the closure so that the soap stone block will be removed or inserted simultaneousl with the closure. The block might otherwise be set into the bottom of the container, in which case it would be immersed in the liquid contents thereof. I

The arrangement shown in Figs. 4, 5, 6 and 7 is intended primarily for containers of relatively small size, such as one and two quart sizes. The construction illustrated in Fig. 4 is similar to that already described, but owing to the small size it is unnecessary to reinforce the outer shell 51 by means of encircling beads or T-bars. Furthermore, in

- the smaller sized containers it is preferred that the upper orneck portion 52 of the inner shell 53 be drawn together somewhat, as shown in Fig. 4, so as to emphasize the presence of a neck similar to the neck of a bottle.

The lower end of the outer shell, illustrated in Fig. 4, is closed by means of a bottom plate 54, havin its peri hery 55 flanged upward and braze or wel ed to the lower end of the shell 57. The inner shell 53 of the construction shown in Figs. 4 and 5 has its bottom portion 56 formed integrally, its

parts being either drawn or spun into the desired form.

In the modified construct-ion shown in Fig.

' 6, the bottom portion 57 of the outer shell 57 is formed integral therewith in manner similar to the bottom portion 56 of the inner shell 53.

In the further modification shown in Fig. 7, the bottom sheet 58 of the outer shell comprises a dish-shaped member inverted and set into the lower portion of the outer shell.

While I have herein shown and described only certain embodiments of the features of my invention, still I do not limit myself to said embodiments except as I may do so in the claims.

I claim:

1. As a new article of manufacture, a heat insulated can having heat insulatmg enclosing walls, and having its upper end portion adapted to constitute a cover seat, a cover adapted to rest upon said seat,-a series of inturned hooks ivotally mounted on the lower portion of sald cover and adjacent to its outer edge and in close proximity to the walls of. the chamber when the cover is in place on said seat, whereby the hooks are prevented from swinging outwardly having the upper portion of its enclosing wall tapered outwardly to form a cover seat, an upwardly reaching lip at the lower edge 'of said tapered seat, serving to provide an annular gasket seat, a compressible gasket within said seat, a cover for the container having atapered edge adapted to seat snugly against" the tapered seat aforesaid, and having a heat insulating s ace within its body, and an annular bea encircling the edge portion of the bottom of the cover and adapted 'to seat snugly against the gasket aforesaid, to thereb improve the heat insulating qualities 0 the cover engagement with the container, substantially as de scribed.

' 3. As a new article of manufacture, a heat insulated container having double walls and bottom establishing a heat insulating space able container for liquid or other materials of size and shape to seat within the heat insulated container, a cover for the heat insulated container adapted to close its upper end above the second mentioned con- .talner, and a removable gasket of rubber or the like seated between the upper end of the second mentioned container and the inside surface of the heat insulated container, and serving-t0 prevent the circulation of currents of air upwardly between the inside surface of the heat insulated container and the sec ond mentioned container, for the purpose specified, substantially as described.

4. As a new article of manufacture, a cylindrical container of relativel heat insulating quality, a second cylin rical container for liquld or other materials of size and shape to seat within the first mentioned container and establish an annular 'air space between the containers, a cover for the first mentioned container adapted to close the same above the second mentioned container, and a removable gasket of relatively lieat insulating material seated between the upper end of the second mentioned container and the inside surface of the first mentioned container and serving to prevent the circulation of currents of air between the insidesurface within its enclosing wall and bottom, a suitof the first mentioned and second mentioned container for the purpose specified, substantially as described.

GEORGE B. HAINES.

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