US1714634A - Heat-insulated container - Google Patents

Description

May 28, 1929.

Inv/en Z'ore" MAOQMLSIMSNW- f this is not essential.

Patented May 28K,Y 1929.

UNITED i;

a'rsr ROBERT W. s'oABLETr, or PHILADELPHIA, rnnnsrLvAivIA.

HEATJNSULATED ooivrarnnia.

Application filed September 192.6. Serial No. 135,687.

the provision of such a container which willy be so constructed andso insulated that 'no ice or other refrigerant will be necessary to maintain for reasonable periods of time, the temperature of the material shipped.

Other objects arethe construction of such a devicewhich will be cheap to manufacture, which will be Waterproof both inside and out, which will be of sturdy construction to.

ivithstandthe abuse to whichit is normallyv subjected, and which will be of a minimum bulk.

To this end the invention contemplates the provision of an outer casing of sturdy mal terial, such material comprising for instance fibre. This material may be had in either sheet or tube form. Obviously a seamless tube or cylinder would be preferred although An inner metal can or container is spaced from the outer casing by somegood heat insulator, suoli as hair felt or the like, stitched between sheets of more or less waterproof material. The stitching prevents the hair Y felt from settling or saggingfvvhile the container kis in use; wood rim surmounts the 'top edge of the can in a Water tight manner, and inside the outer casing. The bottom of the can rests upon a composite wood block also Within the outer casing, and a flanged metal plate underlies the Wood block. A covering of duck or fabric is then applied to the outer casing, passing over the top of the Wood rim and the flange of the bottom plate. This duck or fabric is then securely held in place by gluing to the fabric and by means of a top and bottom rim preferably of metal riveted or otherwise secured to the casing, which serves not only to hold the duck, but acts as a reinforcement to the edges in use. A top of Wood or other, insulating material, made waterproof by covering with duck or fabric, rests on a ledge or shoulder in the Wood rim. This cover may have a gasket to aid in tightly closing the container, and also be provided with a spring arm entering slots in the top reinforcing ring to securely and tightV lylclose the container. A

The invention further consists in. the novel ssnibmsticn ens of parts hereinafter described and shown in the vaccompanying drawings, in which:

`Figure llis an enlarged fragmentary sectional view showing theconstruction of one formv of my invention. f

Figure 2 `isa perspective of the complete container.

Referring now to this drawing, theouter.

container or casing of some strongv and tough material such as vfiber 1s shown at'1,and 1s "of more or less cylindrical shape. Within this casing is located a metal can 2, galvan-ized or not as desired or of a non-corrosive metal. This can is preferably made lWater tight as by soldering or brazing the seams, as it isextremelydesirable that the insulating material between casing 1 and can 2 be kept dry. 4

l-Can 2 is 'provided withl a flanged upper rim as at 3, to which may be attachedin any convenient manner` an extension 4: eXtending'upwardly. v

Al Wood. rim 5 sur-mounts the flange 3 and fits snuglyV Within the casing l. A channel 6l in the bottom ofthe rim 5 is adapted to `receive the vertical portion ofthe extension 4 which may then be packed with asphalt-um waterproofing material or the like. Thus no Water or moisture can leak between the rimI 5 and can y2.V The rim 5 is preferably ymade of `vvood because of its insulating qualities. A shoulder 7 -is provided to receive the top, to be described hereinafter.

Between the casing l and can 2 I-provide insulating material composed for instance of hair felt 8 stitched between sheets 9 of more or less Waterproof paper. l. have found that p two thin sheets ofthis insulating material serve the purpose better than a single greater thickness. This sheet insulator has the advantage of being capable of being readily handled and cut to shape so that a tight and accuratey fit can be secured. The vertical stitching prevents the hair lfelt k8 from sagging between its sheets 9. y

Directly beneath the bottom of the can 2 I'provide ablock of Wood l0, preferably balsa, which block also extends outl to the casing l, the can 2 resting in a dished cavity in the block top. This centers the can and prevents accidental displacement. Balh sa wood is comparatively soft, and therefore I ind it necessary to reinforce the block de hard. wood plugs l2 elf-tend y as the bottom of the container.'

`Duck, fabric or the like 14 is now stretched over and glued to the casing 1 with-waterproof glue, overlying the top of wood 'riml 5 and the flange on bottom plate 13. A top reinforcing ring l5 is now placed outside the duck and Vsecurely bolted, screwed or riveted as at 16 to the casing 1. In a similar manner, areinforcing ring 17 securely holds duck, bottom plate and casing togcther.

A top is provided and consists of a block' `of insulating material such as balsa as at -18 covered with duck or fabric 19 which may be impregnated with paraffin or the like to render the same waterproof. A hard wood disc `2() o'verlies the balsa block 18 and a gasket 21 lies in va marginal recess. A rotatable spring arm is shown at22 held by :bolt 23. The gasket 21 rests on the shoulder 7 of the container Wood rim 5 Aand the ends of spring arm 22 enter opposed cut outs 1n the top ring 15, so that the top is sel curely heldl in place.

, It will be noted thatthis device as described is absolutely waterproof both inn side and out, so that no moisture as either leakage or condensation can enter and Moreover, the wood rim 5 acts as aY heat barrier between the metal reinforcing' ring 15 and thecan 2, so that heat lcannot leak or be conducted `into the can-:and its contents by this route. Y v

The fact thatjthere is on the side of greater exposure of the can 2, a layer of duck or fabric, a sheet of fibre, four thick- ,i

nesses of paperand two of hair felt, all of which are heat insulators, effectively prevents the transfer of heat into the container,

vso thatice cream, milk, cheese, butter, fish,

candy, or the like placed within the-can 2 willkeep" iny -good condition for great lengths of time.

That I claim is:

1. A portable insulated shipper comprising an outer casing, an inner receptacle, insulation therebetween, a bott-om secured to the outercasing, a support for the inner receptacle which likewise supports said insulation, a dished cavity therein to receive the inner receptacle, a woodrim with a channel in its lower face, an'upwardly extend.

ing flange in the inner receptacle in said 4channel and packed with waterproof material and a relnovable top engaging said rim.

2. A portable insulated shipper comprising an outer casing, an inner-'metallic receptacle adapted to receive the material to be shipped, insulation lbetween the sides of the casing and the metallic receptacle, a unitary piece of relatively soft insulation between the bottom of the metallic receptacle and the bottom. of the casing, said relatively soft 4insulation'extending between the sides of the metallic receptacle and the sides of the casing, relatively. rigid material underlying the bottom insulation, and relatively rigid material passing through the soft bottom insulation and, in contact with the relatively hard material underlying the insulation and in Contact with the bottom of the metallic container, an upper rim attachedl to the casing, and making awater tight connectionwith ,the metallic receptacle, and a removable top engaging said rim., f

In testimony whereof, I afliX my signature.

c VROBERT sminnn'rr,y

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