Sheet-metal packing-case.

Application filed March 8, 1909. Serial No. 481,976.

To all whom it may concern:

Be it known that I, John H. Killion, a citizen of the United. States, residing at Chicago, in the county of Cook and State of 5 Illinois, have invented certain new and useful Improvements in Sheet-Metal PackingCases, of which the following is a specification.

The principal object of my invention is to 10 provide a new and improved sheet metal packing case.

Another object is to provide a sheet metal packing case that can be knocked down when empty and can have its parts quickly 15 assembled in operative relation when desired.

Another object is to provide a sheet metal packing case that shall have great strength in proportion to the quantity of material 20 employed.

Another object is to provide means for fastening the parts of such a packing case in operative relation. _;

Other objects will be more readily appar25 ent in connection with the following specification taken with the accompanying drawings.

With all these objects in view, the invention consists of the combination of elements 30 recited in the appended claims.

' Tn the accompanying drawings, I have illustrated one particular embodiment of my invention which is one of several forms thereof preferred by me at the present time.

Figure 1 is a side elevation of my improved packing case. Fig. 2 is a vertical central section thereof. Fig. 3 is. a top plan view, and Figs. 4, 5 and 6 are sectional views of certain details.

In that particular embodiment of my invention which I have chosen to illustrate in the drawings the packing case has the general shape of a hollow cylinder, the convex side walls being double.

15 is an inner sheet of metal bent around in the form of a cylindrical shell. Where the edges meet, one edge is folded back on the inside, as indicated by the. reference numeral 16, and then forward in a terminal 50 fold 17, the two folds 16 and 17 being spaced apart slightly to receive the opposite edge 18 of the sheet between them. It will be observed that this constitutes what may be called a thrust joint, that is a joint adapted 55 to be maintained against forces pushing the meeting edges toward each other.

Another piece of sheet metal 19 is bent around outside of the sheet 15 in the general form of a cylindrical shell, but with longitudinal corrugations therein. The meeting θθ edges are respectively doubled back, as indicated by the reference numerals 20 and 21 in Fig. 5, thus forming hook shaped slots adapted to engage one another.

The heads 22 of the packing case are alike. ¢5 Each one is corrugated circumferentially and the edges 23 are turned down so that the head forms a cap. The edges 23 are corrugated to correspond to the side wall 19. Each cap or head is preferably formed by 70 stamping it in a die.

At the center of each head 22 is a hole 24. A tie-rod extends axially through the packing case, its ends being screw-threaded, as indicated by the reference numerals 30 and 75 31. The member 26 has a screw-threaded socket 27 adapted to receive the screwthreads 30 on the rod 25. The member 26 also has an externally screw-threaded projection 28 fitting within the hole 24 and en- 80 gaging a nut 29. The nut 32 on the opposite end of the tie-rod 25 serves to clamp the heads 22 together.

Another means for fastening the parts of the barrel in assembled relation will now be 85 described. Near the ends of the side walls notches 33 are cut in the projecting parts of the corrugations of the outer side wall. Other notches 34 registering with these are cut in the projecting parts of the corruga- 90 tions in the flange 23 of the head 22. When the parts are assembled the band 35j preferably a wire, is wrapped around the end of . the packing case lying all the way. in the notches 33 and 34 and the ends of this band 95 are fastened together, for example by twisting them together, a,s indicated by the. reference numeral 36. This band fitting within the notches secures the heads 22 to the side wall member 19. 100

Still another means for securing the parts of the packing case in the assembled, relation will now be described. A. plurality of tie-rods 37 are provided, each in two parts with their ends in alinement and adapted to 105 be drawn together by a turn-buckle 39. The ends of the tie-rods away from the turn-buckle are bent over in the form of hooks 38 which engage the edges of the heads 22. The tie-rods 37 and the turn- no buckle 39 are adapted to lie in the channel parts of the corrugations of the side wall 19.

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While I have described three different means for securing the parts of this packing case in assembled relation, it will be apparent that for some purposes only one of 5 them need be employed at one time. In other cases it may be desired to use any two of them or all of them at the same time.

Before assembling the parts of this packing case the inner side wall member 15 will IO be in the form of a plane sheet of metal. The operator will take this and bend it around in cylindrical shape so as to unite the meeting edges, as shown in Fig. 4. The operator will also find the outer side wall 15 19 in the general form of a plane piece of sheet metal, but corrugated longitudinally. He will take this and bend it around into the general shape of a cylinder, hooking the meeting edges together, as indicated in Fig. 2o 5. He will then slip the cylindrical shell 15 into the shell 19 telescopically. The outer shell 19 has what may be termed, a tension joint for its meeting edges, that is a joint which resists any force tending to pull the 25 meeting edges apart. It will at once appear that when the inner and outer shells 15 and 19 are assembled, as just described, their joints are locked against disengagement. The tension joint in the outer shell 19 can30 not be disengaged because the necessary displacement is resisted by the inner shell. On the other hand the thrust joint of the inner shell cannot be disengaged because the displacement necessary therefor is resisted by 35 the surrounding outer shell.

The inner and outer members of the side wall having been assembled as described, the member 26 and nut 29 may be assembled to one of the heads, as shown in Fig. 2. 40 This head can then bff applied, as shown in the drawings and the tie-rod 35 screwed into the socket 27. Then the other head 22 can be applied and the whole clamped together by means of the nut 32. Thereafter the 45 outer tie-rods 37 can be applied in an ob•vious manner and tightened up by means of the turn-buckles 39. Finally the tie bands 35 can be applied as shown.

If it is. desired to open the upper end of 50 the packing case and to remove the contents by means of a scoop the tie-rod 25 can be unscrewed from the socket 27 and lifted out, thus removing any obstruction that might otherwise be offered to the scoop.

It will be seen that the particular embodiment of my invention which I have described and have illustrated in the drawings is adapted to satisfy the objects stated at the beginning of this specification. This barrel 60 has the advantages that a plurality of them can be packed together very compactly for shipment in knocked-down condition, that the parts of a single barrel are few and simple and that they can be quickly and 65 easily assembled to operative relation to receive and transport a desired commodity. The corrugations of the outer side wall 19 give it great strength to resist blows or thrusts from the outside toward the center and it is further strengthened in this re- 70 spect by the inner shell 15. By the structure disclosed great strength is secured with small use of material.

This packing case can be easily opened when desired without destroying any part 75 of it or impairing its utility, and the parts can be again assembled so that it can be used repeatedly. At any stage of its use. if desired it can be knocked down and then later on completely re-assembled. go