US1768989A - Insulating can jacket - Google Patents

Description

July 1, 1930 R. T. LAAcK I l,"768,989

INSULATING. CAN JACKET Filed Aug. 21, 1924 A TTORNEYS.

` the jacket. o

` Another object contemplatesa new and im- Patented July 1, 1930 i UNi'r sTATEs PAT-EJNr RICHABD'L'. LAoKE; .OF MILWAUKEE, wIsooNslIiN, AssIGNOR TOcANvAsrRODUoTs 'CORPORATION or FoND `Do LAc, wrsooNsIN, A CORPORATION OF Wisconsin' CAN JACKET Application filed August 21, 1921,1.f Serialfl'l'o. 733,282.

This invention relates to improvementsin insulating can jackets and to a method of making same, and moreparticularly to can jackets primarily adapted I for use in the transportation of ice cream and the like.

One object of the invention is to provide a jacket of the Character named, which shall be so constructed as to possess quantities of insulation in such degree that ice cream, for

instance, placed `therein will be kept in its solid or frozen condition for a considerable period of time without the employment of ice or other cooling agents.

Another object is to provide an insulating can jacket made up of 1fleXible material so fabricated that the sides ofl` the tfinished jacket will be self-sustaining, Or in other words, lsuiiiciently Vrigid so that the' jacket v will stand up, this permitting of oans being inserted therein freely and without holding proved method of. fabricating can jackets 'of the vCharacter described.`

Other objects vand advantages will be apvparent from the following description taken in connection with the accompanying' drawg Jacket; Fourof these fiaps are shown'inthe ings wherein one'forrn" of the` invention is 'illustrated.. In the drawin'gs, i 1 1 r Fig. 1 is a perspective view of a can jacket constructed in accordance with thepresent inventionyi ,i i Fig. 2 is a longitudinally 'sectional view thereof; and

Fig. 3 is a combined sectional and eleva- V andstraps 21 and 22, respectively, for securely fastening the flaps in sealing position.

tional view illustrating the method ,of fabricating or building up the jacket.

Referring .more'in detail to the drawings,

*O the .j acket,'in the form of the invention illus- Vtrated, comprises inner and'outer spaced-V V`apart bags 10 and 11,, which may be made of convas or other durable material. Interapart and having interposed therebetween a relatively thick layer of insulating material 14 which may preferably be in the form of. llhairifelt orythe like.V V,The layersof paper 12 and 13, and the insulating material also,

extend over the `bottom of the jacket, as

shown, and the outer bag 11 is of double thiokness, as shown at- 15 over the bottorn of the jacket and part way up the sides thereof. A section of rope 16 Or other suitable material Vmay besecured around the lower edge of the j acket at the vbottom thereof to assist in maintaining thesame in an upright position.

At intervalsaround the upper edge Of'the outer bag the material of the latter is continue'd a substantial distance upwardly beyond thenormal upper edge of the j acket, as shown at 17 thes'eextensions of the material to formpocketedflaps 19. These flaps are vpreferably stitched across their extreme outer edgesand the folded-back portions are also stltched along theirside edges to the corresponding side edges of the `adj acent material. :"3'

f The pockets thus formed may be stuifed with insulating material .20 also in the form of vhair -felt or the like, and the lower edges of 4the vfolded-back portion 18 of the flaps are secured in suitable'manner to the top edges of the inner bag 10. In. this'manner the flaps 19 are formed integrally with the body of the Vmay l be f folded down in overlapping fashion to effectively close and seal the samesoias to prevent any materialcirculation of air`V into or out of the acket at this point. The fiaps are provided with inter-engaging buckles It has been found advantageou's in practice to position the vrivets or the like 24 used in fastening Vthe buckles and straps to the flaps sothat they may also serve to secure the lower edges of thedownwardly ,folded portions 18 of the flaps to the corresponding 'upper edges of the inner bag 10, as shown, z

for instance, in Fig. 2 of the drawings.

, If desired, the two bags 10 and 11 of the jacket maybe stitched together' along their upper edges at the `points 23 between the flaps. This stitching at the points 23 is the wrinkling.

plicant applies a heavy water-proof glue in between each layer as the body of the jacket is fabricated or built up. This not only serves to securely bind and hold the various layers together, but it has been discovered that a certain stiffness or rigidity is also imparted to the body of the bag suflicient to render the sides thereof self-sustaining to such a degree that the bag will stand alone. This also presents an advantage over aokets of this kind as heretofore constructed, in.

that these prior bags Were so flexible that they had to be slipped over the can in much the same manner as a sack would be applied to an object. o

Coming now to the method of making or building up the acket, which method forms an important feature of the present improvements, the samewill be described with particular reference to Fig. 3 of the drawings.

This method consists lfirst in forming the inner. and outer bags and 11, the outer' of larger diameter than the inner, so thatwhen the two are in telescopic relation a space is provided ,between the side walls and bottoms thereof to accommodate the layers of insulating material previously described. After the inner and outer bags have been made, the inner bag is pulled over a' form or mandrel which may be formed of metal or any other suitable vmaterial'and of a size so that the bag will fit the same snugly to avoid After the) inner bag 10 Vhas beenfpulled over the .form or mandrel, as shown in Fig, v

a coat'ing` of heavy water-proof glue .is applied to the sides and bottom'thereof, after which the first layer of tarred paper or the like is applied, over both the sides and bottom of the bag. Next, another coating of glue is applied to this first layer of paper and the comparatively thick layer of hair felt or other insulating material is then attached to the sides and bottom of this layer of paper, and a coating of the glue is applied to the hair felt after which the second layer of tarred paper or the like is applied. Another coat of glue is then applied to this second layer of paper and the outer canvas bag 11 is then pulled over the structure thusi formed, and as above described may be stitchedV at the Corners 23 to the inner bag and the fiap portions formed as above described and the buckles and straps attached.

In building the jacket up, as described, each layer is applied smoothly and evenly with the result that after the glue has become hard and dry the acket is held in cylindrical shape and presents a very smooth, trim, and neatlike appearance. The jacket may be left on the form until the glue has hardened or it may be removed and placed to one side until the glue becomes hard. As above described, the glue and paper impart the desired stifness and rigidity to the bag.

vIf desired, the mandrel or form 25 may be rotated in applying the paper and hair felt layers, and thelatter wound spirally. thereon or theinandrel may be statonary in applying these materials. v,It will also be obvious that, if desired, a form or mandrel square or rectangular in cross-section may be employed tol form a bag of similar cross-sectional contour. J ackets ofthis kind Will be found desirable in the shipping or transportation of ice cream or the like contained in square or rectangular cans., For instance, brick ice cream is oftentimes put up in .cans of this type. Due to the stifness of the present bag, it lends itself readily to formations having cross-sectional contours other than eircular, as due to the stiffness, the shape Originally imparted to the bag will be maintained.

VVhile the present improvements have been 'described as of'particular usefulness in con- 'nection with the transportation of 1ce cream,

it will be obvious to those skilled inthe art that the invention is not limited to such use,

but fon the otherhand might be employed as an insulating jacket for a variety of different purposes.

If desired, a strap or fiexible bail 26 may be provided to facilitate 'handling of the jacket.

It will also be obvious that the present improvements are susceptible-to various other changesv and modifications without departing from the spirit of the invention, `vand it is not therefore desired to limit or restrict the same, except where limitations appear in the appended claims.

The invention claimed is:

1; A`jacket 'of the class described comprisingl inner and outer bag-like elements spaced apart and having insulating material between the sides and bottoms thereof, the material of the outer bag being extended beyond the normal top edge of the jacket at intervals therearound, said extended portions being folded back upon themselves to provide pocketed flaps, the extreme edges of the outer bag extensions overlapping upper edges of the inner bag, inter-engaging straps and buckles for securing said flaps in overlapped closing position, means for securing said straps and buckles to said jacket, said means also serving to secure said overlapped edges of the inner and outer bags together.

2. A jacket of the Character described comprising an outer fabric bag, an inner fabric bag positioned Within and in spaoed relation to the outer fabric bag, a coating of water proofing glue on the inner surface of the outer fabric bag and on the outer surface of the inner fabrio bag, a layer of ta'rredV paper w united to the inner surface of the outer fabrio bag by the coating of Vglue thereon, a second layer ofV tarred paper united to the outer surface of the inner fabrio bag by the coating of glue thereon, `said layers of tarred paper 1;, being stiffened by the glue as Well as secured to their respective bags and aoting to stiifen as Well as to Water-proof the jacket, coatings of glue on the confronting surfaoes of the layers of tarred paper and a relatively thick 20 layer of insulating material interposed between said layers of tarred paper and united thereto by the coatings of glue thereon.

3. A jacket of the Character desoribed comprising inner and outer fabrio bags, thin lay- 25 ers of Water-proofing and stiffening material positively united to the oonfronting surfaces of the inner and outer fabric bags and a relatively thiok layer of insulating material interposed between and united to the water-proof- .20 ing and stiflening layers. w

In Witness Whereof I have hereto aflixed my signature.

RICHARD T. LAACKE.

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