US2326817A - Collapsible insulating casing - Google Patents

Description

Aug. 17, 1943. P. ZALKIND 2,326,817

COLLAPSIBLE INSULATING CAS ING Original Filed April 20. 1936 Fig: 2 mvENTQk ,7 I I y ATTORNEYS hollow Walls.

Patented Aug. 17, 1943 UNITED 1 coLLAPSmLEINSULATIN CASING f 7 Philip Zalkind, New York, N. Y. 'Griginal application April 20, 1936, Serial N0.- 75,315. Divided and this application. August I 17, 1929, Serial-No.-290,582 5 a 1 v tonne," (01, 2213-14) My inventionis a division of my application Serial No. 75,315, filed April 20', 1936, now matured intoiPatent No. 2,173,871 and relates to novelheat insulated containers, and more particularly-re lates to folding or collapsible containers.

My invention comprises a container formed fromrblanks of sheet material; such as corrugated board, box board and the like, cut, [scored and folded in a manner to provide a casinglhaving These hollow walls provide dead air spaces which effectively insulate the containeragainst the passage'of heat. Thus, with my construction alcontainer is provided which maybe folded or collapsed, and at'thesame'time isan efiicient, heat insulator. Sucha container may be used for the storage of. either hot orcold 'm'odification' the outer casing. comprises a plain rectangular tube which may be made from an integral.rectanguliar'blank of slieet'material hav- "ing parallel score lines which divide the blank into the four side wall membersof the tube, such V as members 8%, 8!, 82 and 83 ofFigure ,1. The

materials, whichare' to be maintained either hot.

' or cold as the case may be. 1Thus my container is particularly adapted tothe shipment of icecream and the like, but I do not limit its use to this particular'purpose. My container;v is inexpensive to construct. It may be: stored inknock down conditionfand maybe so delivered to the user. It therefore requires comparatively little spacefor storing-and cost oidelivery will be. relatively low. Moreover, where additional heatinsulation is required, my container is adapted'to receive filler members which provide such additional heat insulation; These members may be" of any well known type, but where such 'a'dditional insulation is necessary, I prefer to use one of the types of insulating filler disclosed in my copending applications Serial Nos; 75,314, now.

matured into Patent N0. 2,231,982,"and75,316.

H The objects of my invention are thus-to provide a container that may be collapsed or folded, that Hi3 and l gand lill and-108,, Extending from provides insulation against the passage of heat, that is, inexpensive to construct, and that is adapted to receive an insulatin filler. There are other objects of my inventionwhlich will be ap 'parentirom the following detailed description in a connection with the drawing, in which Figure 'I is aperspective view, partly cut, away. showing a modified form of my novel container. v Figure 2 is a developed view of a blank for forming the inner shell shown in Figuregl.

ofFi'gure 2in 'a'collapsed condition.

Figure 3 is aperspective view showing the shell tube is preferablyformed bylunitin'g the outside edges of the blank by-mean's of tape provided'with an adhesive coating which overlaps both. of the end panels of the blank. Howevenan additional flap may be? provided for making a lap joint; or

the tube may be joined on the face'ot'a' side member rather than at a corner ofthe tube.

, A suitable blankror the inner shell is shown in FigureQ; Theblank shown in this figure comprises'four side walls 9| to 94, eachSepai-ated'by .av series of parallel score-lines; as; for example,

95 951 and 97;.thus providingtwo-narrow panels, as, for, instance,"99 andjliltl extending between each'twoma'in panels. When the bl'ankis assembled the two'narro-w panels of each paiiwlie in ,face .to face relationship with each other and maybe united with each other ina suitable man- 1.1181, as'," for "instance; by theuselof an adhesive, substance. Each-pair ofnarrow panels so united I ,forms a spacing member,

'shown'jin Figures 1, 3'andi4, g -I Protrudingirom each of the side wall sections atthe top and bottom thereof areend wall clo which is 7 clearly .sure sectionsllll and I02, separated from theirv individual side-wallyseetions. by the score lines the end Wall s'ectionsfil amiss are the tabs His iformed'is shown in'FigureB, V

Figure 4 is a'perspective viewshowingthe inner shell of Figures 2 and 3 assembled for insertion,

into the outer shell as shown in Figure 1.

Figure 5 is a developed view of a blank for forming the cover shown in Figure 1.

Referring now to Figures 1 to 5, I have shown a referred embodiment of my invention. In this fabove,-the end lseotions l5] are'turnedabout their score lines! as and me until" the narrow sections we between the-score "lines 1 es and" m are in face to face r'ela-tierisi-iip"with their cor To assemble th'e shell from the collapsed tube,

. the side walls '51! and "94 .are'turned on their-score lines "untilnthezside'walls are inproper angular I relationship to each other... Fora rectangular 1' casing;- of course, eachwall shouldbe at aright engle to its adjoining wall. 7 When the tube has been-expanded into proper position, asde'scr-ib'ed respondingside Wallsections ill-94. Thersecsections I02 are then folded to be perpendicular to the side walls. The narrow panels I09,in conjunction with the top edge of their respective side walls, form a peripheral outstanding flange at the top edge of the shell, as is clearly shown in Figure 4, which shows an expanded and assembled inner shell as viewed from the top. A

similar peripheral flange is formed by the panels I III at the bottom of the shell.

To complete the insulated casing the inner shell is placed within the outer shell, as is shown in Figure 1, the space flanges'98 at-the corners of the inner shell fitting snugly'within inner corners of the outer shell. Pan shapedclosures III are then applied to the upper and lower end of the outer casing.

A blank for such a suitable end closure is shown in Figure 5. It comprises merely a main section H2 with four side flaps as at H3 and separated from the main section by the score lines 90. The member I I I formed by bending the flaps I I3 on the score lines 90 is proportioned to fit snugly within the outer shell of the casing. It can be seen that this casing maybe easily assembled and may be easily recollapsed for reshipment after use.

When the shell is assembled as described above, six separated dead air'spaces are provided for insulating 'the' container. Thus, a single side wall panel of the inner shell,the two spacing members'QBat each side of the:panel, the'corresponding side wall of the outer shell, and a section of each of the pan-shaped closure member form a dead airspace isolated from the other spaces between the two'shells; and each of the four walls is thus provided with'its isolated air space. At each end of the container? anisolated dead air space is provided-shy the panshaped member abutting the outstanding peripheral flange formed on the closure of the inner shell. It will be, of course,= understood that, by properly proportioning the various flanges and panels, the thickness of the dead air space may be adjusted to any desired value depending upon the particular application.

It will be noted that the inner casing just de scribed may be used with the outer casingshown in my Patent 2,173,871.. In this .event, the top ends of the flanges 98 may be removed, as shown in Figure 4 at 89, so as to matchthe hollow reinforcement around the top edge of thef outer .shell of Figures 1, 2 and 4"of l?atent 2,173,871.

Where this outer shell is 'used with the inner shell shown in Figure 4, the bottom end'closure on the outer shell may. be provided in the outer shell blank, and the top end closure may be a hollow plug member, and designed to fitlwithin the outstanding flange, provided by the top 010- sure of the shell of Figure 4. It will befurther understood that various other combinations may be used, as, for instance, the inner shell shown in Figure 4 may be used with an outer shell having a bottom end closure, as shown in Figure l and a top end closure, asshown in Figure 1.

casing.

While I have shown my casing to be rectangular in cross-section, it may be hexagonal or 0ctagonal just as readily, by providing the proper number of sidewall panels, and the tube so formed may be collapsed in the same manner, as is shown in Figure3 for the rectangular tube. Thus, for a'hexagonal casing of the blank of Figure 2 will have six. main.panels, such as panels 9|, and the closure panels ml and I02 will be hexagonal. It is not necessary to provide a closure panel, such as panel IM or I02 for each side wall, with a rectangular casing or one of a greater number of sides. However,

.. where a'lesser number of full flaps are provided on each end then there are sides to the casing. I prefer that the narrow panels, such as I09 and H0, be provided on the blank; and that on those sides where the closure flap is omitted, the narrow panel be secured to the side panel in a suitable manner.

Where higher insulating value is required than is readily obtainable with a single-insulating air space protecting 'anyarea of. the container against transfer of heat to or from the container, I may provide additionalheat insulating means between the inner and outer shell. In my patent application entitled Insulation sheets, Ser. No.

'75,316 and filed April 20, 1936, I have ShOWn a non-collapsible type of heat insulating filler; and in my application entitled coll-apsibleifiller, Ser. No. 75,314 and also filed April 20, 1936,.now matured into Patent, No. 2,231,982, I have shown a collapsible type of heat insulating filler; Either of these types of fillers are adapted to be inserted between the inner'and outer shells of the casings which I have disclosed in the present application; and fillers of these types provide a plurality of air spaces in series to the passage of' heat perpendicular to the wall of the container. It will be understood that many change's'may be made in'my insulating casing, and that the particular modifications described are shown by way of illustration only, and are not intended to limit my invention within themeaning of the appended claim. Now having describediny invention in a manner that it may be readily, 'understood by one. skilled inthe art, I claim: A collapsible insulating casing comprising an inner and an outer, shell and dish-shaped closure members; said outer shell comprising a collapsi- 'ble tube forming the outer side walls; said inner shell comprising side walls, end Walls, flanges lengthwise of said side walls at the juncture of each to'adjacent side wallsfflaps for bottom and top walls, peripheral flange members of said inner shell along the top and bottom of said shell;

said lengthwise flanges on' said inner shell cooperating with said outer shell at its corners to l'secure the side walls of said inner and outer shells in predetermined'spaced relationship with each other, thereby forming dead air'insulating spacing covering the side walls of said casing; a member formed of sheet material enclos- 'ing the lower end of said casing to form a dead air insulatingi space covering the bottom end of said cas ng, and asimilar member formed of sheet material enclosing the upper open end of said casingyand thereby forming a fdead air insulating space covering the top end of said PHILIP" ZALKIND

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