US2774504A - Container for liquid commercial products - Google Patents

Description

Dec. 18, 1956 G. A. MOORE CONTAINER FOR LIQUID COMMERCIAL PRODUCTS 4 Sheets-Sheet 1 Filed April 28, 1955 IN VEN TOR.

Dec. 18, 1956 ca. A. MOORE 2,774,504

CONTAINER FOR LIQUID COMMERCIAL PRODUCTS Filed April 28, 1955 4-Sheets-Sheet 2 Dec. 18, 1956 G. A. MOORE CONTAINER FOR LIQUID COMMERCIAL PRODUCTS 4 Sheets-Sheet 3 Filed April 28, 1955 INVENTOR.

Dec. 18, 1956 s. A. MOORE CONTAINER FOR LIQUID COMMERCIAL PRODUCTS 4 Sheets-Sheet 4 Filed April 28, 1955 "Haw \mgw

HI I

IN V EN TOR.

United States Patent CONTAINER FOR LIQUID COMMERCIAL PRODUCTS George Arlington Moore, New York, N. Y. Application April 28, 1955, Serial No. 504,468 Claims. (Cl. 220-4) This invention relates to heavy duty containers of metallic or other flat sheet material, and more particularly to novel means and method for making such containers rectangular in shape so that they will provide an efficient space saving carrier for economical distribution of liquid petroleum products including other varieties of commercial liquid or viscous materials.

Primarily, the present invention contemplates the provision of the above containers being made of rustless aluminum sheet formed in novel fabricated structure of sealed enclosure walls capable of carrying heavy bulk capacity for the above products and affording unusual protection for the product because of the reflective heat insulation aluminum alfords to reduce product shrinkage due to evaporation losses that may be caused by heat exchange to which petroleum containers are usually subjected and, including minimizing any build up of h gh internal vapor pressures within the container when being subjected to external sources of heat.

The instant invention particularly constitutes structural improvements on applicants co-pending application Serial No. 414,242 filed March 5, 1954 and one of the prime objects of the present invention is to provide containers constructed with rectangular flat enclosure walls of exceptional bonded strength that will provide when filled, capacity facility and efliciency with which to carry pay load increases of up to substantially fifty percent compared with conventional steel drums or barrel type liquid carriers.

Another object of the present invention isto provide a heavy duty container of the above type by a novel method with which to form six fiat enclosure walls upon assembly of two component parts, and end wall thereof being provided with a pair of initially open ports to be used for access into the interior of the container of scam forming apparatus for the above enclosure walls prior to the permanent closing and sealing of the ports, which ports are exclusive of other means provided for filling and dispensing of the product intended for the container.

A further object of the invention is to provide a container of rectangular shape in cross section made of two flat strips of metallic sheet, the container being provided with substantially uniform flat Walls, the enclosure walls being reinforced in a novel structure that affords a capacity range for the container to be in excess of 55 gallons of liquid.

A still further object of the invention is to provide a container of the above type made by a simple method of bending wall defined portions of the above strips which are then assembled together to provide the entire enclosure wall structure of the cointainer, the seams of the enclosure walls being efiectively bonded together by use of resinous adhesive such as epoxy or isocyanate resinous material.

Still another object of the invention is to provide a strong relatively light weight heavy duty container that may be fabricated in a novel manner whereby the body portion thereof may be of relatively small dimensions in horizontal cross section and elongated in general to provide required capacity, thus making the containers suitable for being grouped together in multiples when filled, for economical handling and efiicient pay load trans portation, particularly by military aircraft.

A major object of the invention is to provide heavy duty containers of aluminum sheet having novel structure that does not require use of complicated expensive dies and high maintenance costs thereof for forming the container, the aluminum containers being adapted to be made in a wide range of sizes, and upon obsolescence, affords a substantial scrap salvage value and a contribution for the conservation of the natural resource of the aluminum used to make the containers.

A further object of the invention is to provide heavy duty containers having six substantially uniformily flat enclosure walls sides void of structural rim projections and recessed heads, the rectangular container being provided with novel means with which it may be lifted and handled when filled, in a simple and convenient manner.

Other objects and novel features of the invention will appear more fully hereinafter from the following detailed description when considered in connection with the accompanying drawings, wherein a basic embodiment of the structure of the invention is illustrated. It is to be expressly understood, however, that the drawings are utilized for purposes of illustration only, and are not to be taken as a definition of the limits of the invention, reference being had for this purpose to the appended claims.

In the drawings, wherein similar reference characters refer to similar parts throughout the several views;

Fig. 1 is a plan view of a blank adapted to be formed into a component part to be used in assembly of the container of the above type;

Fig. 2 is a partial perspective View of the blank of Fig. 1 showing defined wall portions thereof as formed with longitudinal marginally bent opposing side flanges;

Fig. 3 is apartial perspective view of the blank of Fig. 1 showing a downwardly bent end wall portion thereof which defines one terminal end of the blank, a structural buttress member added to the blank being shown in dotted lines;

Fig. 4 is a partial perspective view of an opposite bent terminal end wall portion of the blank shown in Fig. 1;

Fig. 5 is a perspective view of the completed component part to be used in the assembly of the container provided by the blank shown in Fig. 1;

Fig. 6 is a partial perspective view of an upper top corner portion of the component part shown in Fig. 5, and showing an example of the adaptation of how marginal portions of the end wall thereof may be bent to complete the construction of the above end wall after the assembly of the container is completed;

Fig. 7 is a plan view of a second blank adapted to be formed into another component part to be used in as sembly of the container;

Fig. 8 is a partial perspective view of the central wall portion of thevblan k shown in Fig. 7 and showing upturned marginally opposed side flanges, wall portions thereof being provided with cut V-notches;

Fig. 8a is a fragmentary view in perspective of'the blank shown in- Fig. 7 showing means that may be employed to stilfen wall portions thereof;

Fig. 9 is a perspective view of the completed component part formed of the second blank shown in Fig. 7 to be used in the assembly of the container;

Fig. 10 is a perspective view showing a partial stage in the assembly relationship of the component parts shown in Figs. 5 and 9;

Fig. 11 is a perspective view of the completed stage of the assembly of component parts which forms the structural shape of the container;-

Fig. 12 is a plan view of the assembled container shown in Fig. 11 and which shows the container in horizontal position engaged with portions of scam forming apparatus disposed within the interior of the walls thereof;

Fig. 13 is a side elevation showing a fragmentary portion of a piece of the apparatus disposed in the interior of the container shown in Fig. 12;

Fig. 14 is a vertical cross sectional view of the body of the container and portions of engaged apparatus therein taken on line 1414 of Fig. 12;

Fig. 15 is a partial perspective view showing the top end of the container in a stage of being closed and reinforced to complete the structure of the container;

Fig. 16 is a perspective view of the completed container;

Fig. 17 is a vertical cross section of the container shown in Fig. 16 taken along line 17-17 and showing a side elevation of the structural base reinforcing buttress member shown in Fig. 3 which is used to strengthen wall portions of the container and which provides a body housing for adaptation of the orifice arrangement for the container;

Fig. 18 is another vertical cross section of the container shown in Fig. 16 taken along line 1818 and showing the above base reinforcement buttress member disposed in cross section;

Fig. 19 is a horizontal cross section of the body of the container shown in Fig. 16 taken along line 19-19; and,

Fig. 20 is a perspective view of a multiple grouping arrangement of containers as may be provided to facilitate the handling thereof afforded by the novel flat wall structure of the container shown in Fig. 16.

The present invention is particularly directed to a means and method of providing relatively light weight but strongly reinforced heavy duty containers made rectangular in cross section having capacity range up to 55 gallons or more of liquid and thereby afford greatly increased economy in transporting industrial liquids and petroleum products by substantially eliminating the waste space consumed by round cylindrical drums. For example, the container contemplated by the instant invention When filled with high octane fuel or other liquid product will save such considerable space when stowed in air cargo, trailer truck, railroad car or warehouse as to constitute substantially 50% more pay load capacity as compared with conventional steel drum carriers used for the same purpose. Fieldstorage of the filled elongated rectangular containers of this invention will occupy substantially one half of the surface area that is required for round steel drums or barrels. It is further contemplated, that due to the fact that the container of this invention is provided with six fiat surface walls being void of recessed pockets or rim projections, they may be compactly bundled together in multiple units and thereby facilitate being handled and conveyed with maximum economy and convenience, and if desired for special reasons, the group containers are so arranged that they may dispense their product without being separated into individually handled units. This grouping feature afforded by the container enables petroleum products and other industrial chemical liquids to be carried in these containers by air freight transport greatly reducing the time and expense consumed normally in loading and unloading individual containers, including the efficiency they afford in providing means for a substantial increase in trip pay load compared with the pay load limitations afforded by steel barrels or drums.

To this end, the container is preferably fabricated of aluminum sheet of suitable gauge, the container being formed of two assembled component parts pre-formed of the above sheet material. The range of capacity for the containers fabricated by the method of this invention, may be from one gallon up to in excess of fifty-five gallons of liquid. When fabricating the large size container, one component part used in the assembly thereof may be formed of 3 S aluminum alloy 16 gauge sheet. The other component part used in the assembly of the container may be formed of 24 S or 52 S alloy aluminum sheet of similar gauge. This particular combination of alloy may be employed especially for heavy duty requirements of the container when intended to carry certain variety of petroleum products. In this respect the filled container must withstand a vertical drop test of four feet according to present requirements to certify the container suitable for certain liquids. The container must also withstand an internal air pressure of 15 to 20 pounds per square inch. Hence, either or both of the component parts of the assembled container may be fabricated of the hard and tougher alloys 24 or 52 S if it is deemed necessary to meet the above requirements. Other sheet materials may be employed for making the container such as, stainless steel, black plate or cold roll steel. Aluminum clad steel may be advantageously employed in making the container for special duty purposes. The novel flat structure of the enclosure walls of the container may afford advantageous use of fibre glass sheet with resinous material. However, for purposes of defining the invention, the preferred use of aluminum sheet will be appropriate material for fabricating the container without being limited to this specific sheet material or specified alloys thereof.

The seams of the container if desired, may be welded by conventional methods usually employed in fabricating parts of such sheet material but, the structure of the walls of the container of this invention are made flat with overlapping seam margins, which marginal surfaces may be doped with applied epoxy resinous adhesive, isocyanate resinous adhesive or both in appropriate compound combination. The application of adhesive being made prior to the assembly of two pre-fabricated parts, which parts upon assembly forms the structure of the container after which, the above adhesive is caused to be cured and form a strong cemented bond of the seams approaching the strength of heat welded seams.

Referring more particularly to Fig. l, the present invention is illustrated therein as including a container elongated blank component 4 having a central wall portion 5 defined with a pair of parallel bending guide lines 6 and a pair of parallel transverse bending guide lines 7. The terminal ends of each guide line 7 being extended With a sheared or narrow cut slit line 8, which slit lines define opposed end edges of a longitudinal pair of parallel bendable marginal wall portions 9 disposed outwardly of bending guide lines 6. Each of two substantial likepanels 10 extend laterally outward of each bending guide line 7, each panel being defined with a pair of parallel longitudinal bending guide lines 11, which lines are spaced slightly inward of the edges 12 of marginally defined wall portions 9. Panels 10 are each provided with longitudinal parallel and bendable marginal wall portions 13 constituting flanges disposed outwardly of bending lines 11 and edges 12. The defined flanges 13 have opposite edges 14, the inner disposed edges 14 being substantially in alignment with bending guide lines 7 and the outer disposed edges 14 being in alignment with guide lines 15, which latter lines define the outer border end of each panel 10. The outer border end of one panel 10 is provided with a bendable extended wall portion 16 disposed outwardly of bending guide line 15, and this wall portion is provided with opposite side edges 17 disposed slightly inward of the longitudinal lines 11 of panel 10. The opposite end of the opposed panel 10 being provided with a bendable panel wall portion 18 disposed outwardly of bending guide line 15 of this opposite panel 10. Panel 18 is provided with two parallel side edges 19, which side edges are disposed slightly outward of bending guide lines 11 of the related panel 10. End edges 14 adjacent side edges 19 are terminated in junction with bending guide lines 11. One end extremity of blank 4 is defined with a transverse corner end edge 20 of wall portion 16, the opposite end extremity of the blank being defined with a parallel corner end edge 21, which edge is transverse of side edges 19 of panel wall portion 18.

Referring now to Figs. 2, 3 and 4 it will be noted that blank 4 has been prepared in a partial stage of forming a component part to be used in the assembly of the container. In Fig. 2 marginal Wall portions 9 of the central wall portion are bent upwardly at substantial right angles along guide lines 6. Marginal wall portions 13 of panels 10 are bent downwardly at substantially right angles along guide lines 11. The above marginal wall portions may be bent'with breaker bar apparatus. If desired, marginal portions 13 may be bent by passing blank 4 through flange forming rollers. In Fig. 3 panel wall portion 18 is bent downwardly at substantially right angles along guide line 15, portions of the marginal side edges 19 of bent wall 18 being disposed in coplanar surface relation with the exterior surface of bent portions 13. End edges 14 of bent portions 13 being disposed in edge to surface abutment with portions of the inner wall surface of bent wall portion 18. A buttress bar of suitable aluminum alloy 25 is fitted into the right angular interior surface corner formed by bent wall portions 13 and 18 of wall panel 10. Bar 25 is bridged across the width of the panel with opposed ends 26 abutting interior surface portions of bent margins 13 and including a surface side 27 of the bar being engaged in face to face contact with an interior surface portion of panel 10 and a surface side 28 of the bar being engaged in face to face contact with an upper interior surface portion of bent panel 18. Bar 25 is provided for structural buttress support and reinforcement of this base forming end, and may be welded in place or be secured in its fitted engagement by being adhesively bonded therein with epoxy resinous adhesive hereinbefore mentioned. In Fig. 4 wall portion 16 of blank 4 is bent downwardly at substantially right angles along guide line 15. Side edges 17 are disposed in edge to surface abutment with interior surface portions of bent margins 13. Edge surface sides 14 of margins 13 being disposed in coplanar surface relation with the exterior surface of bent wall portion 16.

Due to the fact that blank 4 is provided with bent wall portions 9, 13, 16 and 18 while panel wall portion 5 and duplicate panels 10 thereof remain in lateral surface plane, it is only necessary to bend opposing panels 10 along their respective guide lines 7 and thereby be disposed downwardly at right angles to the central fixed end wall 5 as shown in Fig. 5, which illustrates the structure of the formed componentpart 30 made of blank4 to be used in the assembly when making the container. A portion of the inner surface of the base end wall 18 of one bent panel portion 10 overlaps the exterior surface of base end wall portion 16 of the opposing bent panel portion 10. This overlapping surface engagement may be welded together if desired, by conventional methods or, prior to effecting the above surfaceto surface engagement, the heretofore mentioned resinous adhesive may be applied to the respective surface portions and be used for bonding the above engagement together. In any event, the wall structure of component 30 affords free access to interior surface portions of other structural reinforcing wall portions 16, 18 and buttress bar 25. If desired, the base wall structure portions 16, 18 and 25 may be further reinforced by augmenting the strength of the resinous adhesive by welding small fillets in right angular corner edges of wall 16 and bar 25 to corresponding wall surfaces. The heat imposed by welding these corners will greatly accelerate the cure of said resinous adhesive and thereby effect great strength to the base section of the component structure 30. The completed component 30 is locked in structural form by top end wall 5, which end wall is integral with two opposed side walls 10. Base end wall 18 is integral with one side wall 10, and base end wall portion 16 is integral with the alternate opposing side wall 10. The base end wall portions of the structure in engagement being contiguously joined together in a manner which is substantially comparable in strength to the basic material of the wall structure. Each pair of vertical corner flanges 13 of the structure are integral with each corresponding side wall 10. The bottom corner edges 14 of the flanges are disposed in edge to surface abutment with upper surface portions of base wall 18. The exterior surface of flanges 13 are disposed in coplanar surface relation with the surface of side edges 19 of base end wall 18. The transverse corner end edge 21 of base wall 18 is disposed in coplanar surface relation with the exterior surface of the adjacent side wall 10. All sharp exterior corner edges of the formed structure are dressed to be smooth and free of burrs.

The second component part to be used in the assembly and making of the container of this invention is formed of an elongated blank 31 illustrated in Fig. 7. The blank is provided with a central wall panel 32 defined with two parallel bending guide lines 33, which lines are transverse of a pair of parallel longitudinal bending guide lines 34, the latter guide lines extending over a major length of the blank and terminating in junction with each of a pair of parallel transversely disposed bending guide lines 35 which define outer end borders of like panel wall portions 36, each of which panels extend laterally outward of each guide line 33. Central panel wall portion 32 is provided with a pair of parallel opposed longitudinal bendable flanges 37 disposed outwardly of and along guide lines 34. Panels 36 are each provided with a pair of similar flanges 38 disposed outwardly of and alongother portions of guide lines 34. Flanges 37 and 38 are substantially separated centrally of terminal ends of guide lines 33. The separation being effected by V-notches cut with inwardly sloping edges 39, each sloping corner edge being inclined outwardly substantially 45 degrees from each terminal end of guide lines 33 so that the notches are spread with corner edges in plane of degrees central of lines 33. The apex 40 of each notch is slightly blunt and being spaced slightly outward of guide lines 34. Opposite end edges 41 of each pair of opposing flanges 38 are disposed outwardly in spaced relation to guide lines 35. Each panel 36 is provided with a bendable wall panel-like portion 42, each of which portions form a terminal end of blank 31. Each panel 42 is defined with bending guide line 35 and outwardly disposed parallel side edges 43, which edges terminate in junction with guide line 35 and outwardly disposed and edge 44. Side edges 43 of wall portion 42 are disposed inwardly of guide lines 34. Each of the corner edges 41 and 43 do not converge into junction with each other, the inner corners of edges 41 being termined in a small notch 45 provided at the inner terminal ends of edges 43 of panels 42. Holes 46 may be provided in spaced relation in flange portions 38. The holes may be punched out or drilled through flanges to be used for purpose to be hereinafter described.

Referring to Fig. 8 it will be noted that flanges 37 and 38 are bent upwardly at right angles to their corresponding base wall. This bending operation along guide lines 34 may be accomplished by breaker bar apparatus or by passing blank 31 through flange forming rollers. It will be further noted that the blunt apices 40 at the base of each converging corner edge 39 of each notch is disposed slightly upward of the upper surface of panel wall por tions 32 and 36. Holes 46 may be punched or drilled after forming the shape of the flanges should the holes provided in blank 31 be distorted by such flange forming operation. The flanged blank may be clamped over the central panel wall portion 32 thereof and thereby provide means with which to bend panel portions 36 upwardly along guide lines 33 and the opposing panels being disposed at right angles to the clamped wall portion 32 thus forming two opposed flanged side walls and an integral flanged base end wall illustrated in Fig. 9. The notches are closed with sloping edges 39 disposed in abutment. Blunt apices 40 of the notches provide slight projection of material, which material may be peened inwardly to reinforce each converging corner junction at the base of the mitre structure. Thus, the second component part 48 is formed to be used in assembly and making of the container. When making component structures 30 and 48 of exceptionally hard aluminum sheet alloys or of relatively heavier guage sheet than heretofore mentioned, the wall portions prior to being bent may be pre-heated to suitable temperature and thereby increase ductility of the sheet for the bending operation as usually practiced in other forms of fabricating such sheet material into bent shapes.

Panel wall portions 36 of component structure 48 may be strengthened by impressing a series of spaced parallel shallow grooves 29 into selected area surface portions of the wall of blank 31 as shown in Fig. 8a. This expedient will serve means with which to counteract any tendency of the side walls to warp, especially when making the component part or parts of relatively light gauge sheet material. The resultant corrugated ribs provided upon exterior surface portions of the walls will reduce scufling friction of the ultimate containers when moved upon these wall portions.

Prior to the assembly of each component part, they may be dipped in de-greasing solutions or otherwise be treated for particular container duty when the assembly is completed. The assembly operation of forming the container is quite simple. Component 30 is prepared with dope deposits of resinous adhesive upon wall surface portions thereof appropriate for the bonding of seams that are formed into registered engagement by the assembly of pre-fabricated components 30 and 48. The selected resinous adhesive 50 may be applied over wall surface portions of component 30 as shown in Fig. 10 which application may include the doping of the inner surface of base end wall 32 of component 43. The U-shape form of walls 36 of component 43 permits component 30 to be easily inserted therein without cramp as illustrated in Figs. 10 and 11, thus forming the structure of container 51. The container being characterized as having a double reinforced bottom end wall with portions thereof integral of alternate pairs of side walls and four marginally reinforced side walls including a top end wall thereof integral of two opposed side walls, the arrangement of the Wall structure being conducive of great strength. The top end wall of container 51 upon being assembled with related component 48 provides two opposed elongated open by-pass ports 52 that are formed of the structural arrangements provided in each of the components 30 and 48 prior to the assembly thereof. The above arrangements are characterized by bent wall portions 9 of end wall 5 including upper portions of walls 10 and flanges 13 of component 30, and wall portions 36 and 42 of component 48 including upper portions of flanges 38.

Resinous adhesive 50 is disposed between engaging wall surfaces of the assembly that constitute the seam zones of the container. In order to apply required pressure upon exterior surfaces of these seam zones for purposes of curing the adhesive and effect a strongly bonded union of the seam surfaces, it is deemed necessary to provide a solid background support of the marginal seam surface zones within the interior of the container upon which to impose the necessary pressure. In order to accomplish this, open ports 52 provides access into the interior of the container of appropriate apparatus that will firmly support these interior wall surfaces that are adjacent the wall areas of the seams and, the support being given without sacrifice of the structural strength provided for the container by the fixed integral end wall 8 5 thereof. The above mentioned apparatus may be characterized as being formed of two opening spaced parallel bars of steel 53 having shape in cross section corresponding to the shape of open ports 52. The bars are supported upon one end thereof by a suitable body portion 54- illustrated in Fig. 12. The assembled container 51 may be engaged with bars 53 through open ports 52, or alternately, the container may be in fixed position and bar support 54 be arranged to move bars 53 into the interior of the container through the open ports in the position shown in Fig. 12. The vertical end of each steel bar is provided with an upper step 55, a lower step 56 and end wall surface 57 shown in Fig. 13. These steps are provided to fit over surfaces that have been previously seamed to bottom end wall 18 of assembled component 34 The bar engagements with the container is illustrated in cross section shown in Fig. 14. The cross sectional area of each bar corresponds to the open space provided by each open port provided on opposed sides of end wall 5 of the container. Balanced pressure may be applied vertically top and bottom in opposing direction upon wall surface portions 38 of the container shown by arrows and, may include pressure applied in opposing direction upon wall surface portions 36 shown by arrows in Fig. 14. The application of pressure may be accomplished by well known methods as by action of a hydraulic press or, the walls of the container may be clamped in suitable manner to provide means to maintain a close union of surface engagements of the seams while effecting a cure of the applied resinous adhesive. Suitable heat may be applied either to bar 53 by use of electrical heating elements or by oven heat to the engaging container, which heat will expedite the time and efliciency of bonding cure of resinous adhesive 50 disposed within the seams of the container structure. Pressure may be simultaneously applied upon bottom end Wall 32 of the container and thereby effect a strongly bonded union of the engaging surfaces of end walls 18 and 32 thereof. Thus, the seams of the container are secured with strong bonds substantially comparable to having been heat welded due to the remarkable adhesive strength given by the herein described use of epoxy resinous compounds. However, the novel structure of the container of this invention affords means with which the seams of the structure may be bonded by spot-welding should such method be desired for bonding the seams. Open ports 52 provide access into the interior of the enclosure walls of the container for inserting therein ground circuit welding bars with which tomake the arc circuit and weld the seams. The spotwelding may be augmented by use of resinous compounds and thereby increase the bonding strength of the contiguous union effected in combining together the assembled components 30-48 constituting the container. The base converging corner ends 40 formed of flanges 37, 38 of the container may be peened inwardly to insure being flush with adjacent wall surfaces. Abutment of corner edges 39 thereof may be bonded by pre-application of the above resinous adhesive upon these edges 39 or alternatively, be welded by conventional methods. A knock-out rod 59 may be provided in bar body support 54 and used if desired to strip the container from bars 53.

It is to be especially noted that the novel arrangement of bars 53 does not constitute a solid mandril, arbor or plug form usually employed in fabricating containers. If such were employed, it would not be possible to construot and retain end wall 5 which holds together the structural form of the assembled container prior to the bonding operation of constructing the seams thereof. Hence, end wall 5 is essential to carry out the novel sturdy design for the construction of the container. A novel feature of the bar support method illustrated in Figs. 12 and 14 is that the container structure is arranged so that surfaces of the bars can not become fouled with resin, hence, bars 53 may be freely and easily removed from engagements with the interior of the container wall surfaces. The contacting engagement of bars 53 is clearly shown in the cross sectional view'of Fig. 14. The resinous adhesive 50 as shown applied to wall surfaces of components 30 and 48 shown in Fig. 10 illustrates, that even though the resin were to bleed it would not foul any surface portion of the engaging bars. Walls .36 are spaced outwardly of the vertical surface of the bars that are in contact with inner surface portions of wall margins 13. The stepped end surfaces 55, '6 and 57 of the bars engaged with base end Wall surfaces of component 39 can not be fouled with corner edge extruded adhesive because of previous curing of wall surface to surface bonding engagements thereof made prior to assembly of the container.

It is stressed particularly that the above unique adhesive applications used in the above method of making the seam structure of the container is capable of providing a shear strength in excess of 2500 pounds per square inch with room temperature cure of the applied adhesive and in excess of 4500 pounds per square inch with elevated temperature cure thereof. Bond strengths may be considerably in excess of 227 pounds per square inch.

After removing container 51 from bars 53, open by-pass ports 52 provide means through which the interior wall surfaces of the container may be given various flushing treatment. For example, cleansing solutions being flushed in and out of the ports and coating compounds may be applied to interior wall surfaces for special purpose. The two opposed ports provide means with which the container enclosure walls, when formed of aluminum, may be anodized if desired. Open ports 52 are arranged in a novel manner to be used for sterilizing the container when its use is intended for transporting such products as whole fresh milk and other edible liquid or viscous products. Open ports 52 may be closed and sealed in a novel and efficient manner prior to the filling of the container with its intended product as illustrated in Figs. 15-16. An application of the above adhesive 50 may be applied upon the inner surface of wall panels 42 as shown on one upright panel in Fig. 15. Marginal portions 9 of end wall 5 are each bent outwardly and downwardly as illustrated in Fig. 6. In general, margins may be pre-heated along guide lines if desired to facilitate bending. It is to be noted that these bent margins of component 30 are stopped by right angular shoulder end edges 14 formed by top extremity portions of walls 10 and flange 13. Corner edge surface 12 of each bent marginal wall portion 9 being disposed in coplanar relation with marginal iii-- terior wall surfaces of the upper border of side walls 36. Fig. 15 shows the corner edge 12 of marginally bent wall portion 9 engaged in edge to surface abutment upon applied adhesive 50 on wall surface 42, which adhesive is extended to cover edge 12 including top edges 14 of flanges 13 shown in Figs. 17 and 18. Top end edges 41 of flanges 38 are spaced upwardly of the exterior surface of bent margins 9. Each abutted corner edge 12 provides a bending ledge over which each wall panel 42 may be bent inwardly and downwardly upon previously bent portions 9. The adhesive surface 50 of bent panels 42 engages the exterior surface of wall portions 5 and 9 in uniformly flat surface to surface relationship. Portions of the opposed sides edges 43 of bent panel 42 are engaged with inner surface portions of flanges 38 adjacent top edges 41, which sdge surfaces 41 are disposed in coplanar surface relation with the exterior wall surfaces of bent panels 42 as illustrated in Figs. 16 and 18. In order to effect the above coplanar relationship, corner opposed edges 43 terminate downwardly of top edges 41 at slit terminals 45, which slit terminals permit panels 42 to be free to bend properly over corner edges 12. Corner edges 44 of the bent panels 42 are disposed in close edge to edge abutment. Edges 41 of flanges 33 are preferably dressed to remove sharp corners and insure against surface projection above the exterior surface of bent end wall portions 42. Pressure is then applied downwardly upon the surface of the closed end wall of the container to effectively cure the adhesive which seals all junctures of the port closures 52. Thus, the container 51 is provided with a strongly reinforced two-ply end wall that is uniformly flat and being rendered exceptionally strong at wall converged corner, ends by structural benefits afforded by the seamed wall engagements of the novel co-operation of structure provided by the assembled components 30 and 48.

The lower bonded base end wall of container 51 is also constructed two-ply and being exceptionally reinforced by the inner disposed bonded buttress wall portion 16 and bonded structural buttress member 25 hereinbefore described and illustrated in Figs. 3 and 5. Structural member 25 may be adapted to provide a body housing for embodiment of an orifice arrangement and provide efficient utility withwhich to fill and dispense liquid products that are intended for use of the container. This arrangement is shown in cross sectional views of Figs. 17, 18 and 19 taken along lines 17, 18, 19 of container 51 shown in Fig. 16. Body housing 25 may be provided with a drilled hole 60 and extended hole 64. The hole being drilled through walls of the container into and through body 25. End portions of the hole being threaded to provide engagement of a suitable threaded plug at each end thereof. The engagement of the plug being recessed within the hole so that each plug will not project outwardly of the adjacent exterior wall surfaces of the container. It is to be understood that in the range of larger size containers contemplated by this invention, the dimensional width of the body thereof in horizontal cross section may vary between 14 and 20 inches hence, the size of the structural buttress member constituting the body housing may be made to accommodate a threaded hole up to 2 inches diameter if required. A hole 61 may be drilled transversely through end wall layers 18 and 32 through body housing 25 and be threaded similar to hole 60 for adaptation of a recessed plug. The above mentioned threaded plugs may be of the tapered pipe thread type or be provided with straight threads and shoulder gasket, either type having a central hole in the body of the plug adapted to receive a socket type wrench as shown by plug 62 adjacent the base of container 51 of Fig. 16. Holes 6061 communicate within the body housing so that the container may be filled through hole 61 while being in up-right position. Hole 64 may be opened to serve means of providing a vent while filling the container. The contents of the filled container may be dispensed from the container through hole 60 while in horizontal position. The communicating hole 64 providing a suitable vent. In elevated vertical position of the container, the contents thereof may be dispensed through hole 61. A suitable vent may be provided at a desired location in a region at the opposite end of the container. The base end wall area of the container will occupy considerably less space than required of round steel barrels or drums hence, will conserve floor space in industrial plants or warehouse usually employed for use of the filled containers for dispensing purposes. The above orifice arrangement provided by body housing 25 is very flexible in utility and efliciency. For example, when filling the container through hole 61 the vent may be provided by use of hole 64. Body housing 25 may be provided with drilled holes arranged such as hole 63 so that the container may be tilted when near empty and thereby scavenge liquid otherwise that would remain in the container. A vent hole 65 may be provided to communicate with hole extension 64. The above holes may be drilled into member 25 prior to its use in the structure of component 30. p

The novel structure of flat enclosure walls of the container provides wall surface areas that may be selected for being augmented with a positioned body plate bonded in secured surface to surface relationship therewith and thereby constitute means through which to provide facility for embodiment of an openable and closable closure arrangement sufiiciently large to fill and dispense viscous or fine powder products that may be intended for use of the container.' Such auxiliary closure embodiment of suitable construction may be applied in the wall structure thereof to suit special duty purpose of the container of this invention without departing from the structural principle upon which the container is built.

Holes 46 provided in flanges 38 of container 51 shown in Figs. 16-18 are closed by side walls 10. These holes are intended to be used to facilitate easy handling of the containers when fabricated in the larger range of sizes. For example, the container of the size required to carry 55 gallons of liquid, will weigh approximately 440 pounds after being filled. It is intended that a steel grappling tong may be employed to handle the container, the tong being provided with a pair of opposed hardened steel pins fastened into the grappling tong ends adapted to fit into the above mentioned holes. The grappling tong being constructed upon the principle of an ice lifting tong attached to a cable of a conventional portable crane. The pins may be mounted into the gripping ends of the tong so that a flat shoulder Wall surface adjacent each pin will tightly clamp against opposing exterior wall surfaces of the container adjacent the engaged holes as the tongs are drawn inwardly in opposing direction by action of pull by the cable lifting movement and the mounted pins serving as dowels to secure the clamp. Thus, the container may be lifted and moved into any position or location desired. Holes 46 are arranged in opposing pairs upon two opposing sides of the container to facilitate the use of the grappling tongs upon either end of the container for convenience of manipulation. In this manner, heavy weight filled containers may be easily handled without otherwise complicating and interfering with the efficient utility afforded by the smooth flat surfaced walls of the container structure.

It is further contemplated that the novel construction of the container of this invention affords bundling of containers especially for conveyance by air cargo planes. The fact that the container is rectangular with flat walls, will permit containers to be closely grouped in multiples and be clamped together as shown in simple diagram illustrated in Fig. 20. The compact space saving bundle may be easily picked up by use of strap 66 and handled by cable crane to be moved to any desired position for stowing and transportation. For an example, in emergency, multiple container filled units may be slung and secured within an air shield exterior of the fuselage compartment of the plane for conveyance. In a like-bundle, the combined multiple containers will afford considerable economy for being handled conveniently in general for stowing in other means of conveyance for cargo shipment including storage. It is also contemplated that the above facility afforded by the structural design of container 51 provides convenience, in that the bundled containers may be positioned to dispense their contents without being unshackled if desired. Hence, when empty, the containers in bundle may be economically handled for return and refilling. The containers made of aluminum when empty, weigh approximately one third of the weight of conventionally used empty steel drums. Upon obsolescence of the aluminum containers of this invention they will have a scrap salvage value productive of a rebate that will materially reduce the initial cost of containers and at the same time contribute as a medium to conserve natural resources of this strategic metal in making them.

It will be understood that the container of the instant invention is provided with a concept of being constructed of two assembled pre-bent structurally stable component parts. The method and structure herein described affords making these containers of sturdy construction with efiicient utility in a wide range of sizes from small to large, and be made of various types of flat sheet material ranging from tin plate to boiler plate. It is also contemplated by the present invention that within its scope of modified embodiments, large capacity containers may be formed of fibre glass laminated sheet material and the structure of the container be formed thereof substantially in accordance with the herein described method.

It has been noted that major seams herein illustrated and described in the formed structure of the container of this invention, are pre-formed in-part and brought into positive rigid register, and in general, the seams are provided with liberal flat surface engaging area in a manner that reinforces the container with exceptional structural strength because of this novel seam forming arrangement. It will be apparent that these liberal seam forming surface areas in the structure are especially suited for being bonded together by use of resins herein specified that will efliciently fill interstitial wall surfaces of seam forming metal to metal engagements and, upon being cured, provide exceptionally strong bonding strength herein mentioned without subjecting the walls of the container to un due stresses and warping distortion. It is to be understood that other adhesive resins may be employed for bonding and filler purposes provided, such resins be proved at least comparable with results obtainable by use of resins in the herein specified epoxy family of resinous adhesive compounds.

The herein described containers of aluminum sheet have exceptional wall reflective heat insulating eificiency that should reduce insurance rates of inflammable products conveyed therein, due to the fact that hazards of a conflagration in regions of locale of these filled containers lessens possibility of loss of their contents because of the above heat reflective insulation aflorded by the new and novel construction of aluminum enclosure walls of the above containers.

What is claimed is:

l. A square elongated heavy duty container of aluminum sheet of relatively heavy guage comprising an assembly of two pre-shaped structural components formed of said sheet that provide initially, six stably formed enclosure walls of said container consisting of four side walls arranged in opposing pairs and two opposed end walls, the bottom end walls being constructed two-ply in general and being provided with wall buttress portions bonded to surface portions of the upper wall layer thereof, two opposed side walls having marginal side flanges bent inwardly along their respective opposing vertical corner edges with bottom ends of said flanges disposed in abutment with the upper surface of said upper wall layer of the bottom end wall adjacent free corner edges thereof, the exterior surfaces of said flanges being in coplanar relationship with surfaces of said edges, two opposed alternate side walls being disposed in surface contact with. the entire exterior surfaces of said marginal and corner edges, said alternate walls having marginal flanges bent inwardly over marginal surface portions of said pair of first mentioned side walls including a pair of lower transverse marginal flanges bent upwardly from two opposed corner edges of the exterior wall layer of said bottom end wall, the top end wall opposed to said bottom end wall being integral of the first mentioned two opposed side walls and being flatly disposed between two upwardly bent marginal flange portions thereof and provide two outwardly opposed by-pass open ports of the top end wall co-operatively provided by outwardly spaced enclosure Wall surface sides of upper wall portions of said alternate side walls including upper portions of said flanges thereof, said pair of by-pass open ports providing means of access into the interior of said container for bar apparatus used in bonding the constructed .seams formed of the assembly of said two structural components, the surfaces of said seams be ing provided with pre-applied resinous adhesive, after which, said ports may be closed and sealed by bonding together engaged surfaces of bent wall portions that provides the open ports and that are disposed in parallel, each opposed pair of wall portions being bent in alternate direction to be in overlapped surface to surface relationship, engaged surfaces of which have pro-applied epoxy resin adhesive compound thereupon and upon being cured, effects the bonding thereof including other said constructed seams of the container.

2. A heavy duty container of metal sheet constructed of two pro-shaped rigid structures bent of said sheet and being cooperatively assembled together comprising each said pre-shaped structure having basic wall portions that are rigidly formed and initially provide six enclosure walls of the container, the inner pro-shaped structure of said assembly consisting of two opposed side walls, which walls are provided with two opposed end walls, each of said two side walls being also provided with a pair of opposed inwardly bent marginal flanges along longitudinal corner edges thereof, said flanges having bottom end edges thereof in abutment with upper surface marginal wall portions of the bottom disposed end wall, the exterior wall surface of each flange being coplanar with vertical surface sides of free corner edges of said bottom end wall, upper terminal ends of said flanges being free and joined with right angular free edge portions provided by two parallel opposed upwardly bent horizontal marginal wall portions of the top end wall of said structure, which top end wall is disposed centrally between said bent margins, the outer pre-shaped structure of the assembly consisting of two opposed alternate side walls having an integral bottom end wall exterior of the bottom end wall of said inner structure, said alternate side walls having marginally opposed inwardly bent flanges along longitudinal corner edges thereof including along two opposed horizontal corner edges of said integral bottom end wall, upper ends of each alternate side wall having a bendable wall panel co-operatively providing outer wall sides of two opposed by-pass open ports provided in said top end wall in order to provide means for access into the interior of the container of wall supporting apparatus with which the seams thereof may be bonded, which seams rigidly combine said two pro-shaped structures of said assembly together, said by-pass ports thereafter, being arranged to be closed and sealed by bending said top end wall margins including the panels of said alternate side walls, both of which wall portions being bent downwardly in alternate direction and thereby provide uniformly flat lateral extensions to said top end wall, which lateral wall is disposed inwardly of the exterior flat end wall formed of said bent panel portions, said ports being exclusive of other means provided in the structure of the container for filling and dispensing purposes of said container.

3. A heavy duty container according to claim 2 wherein said bonded seams of the container including seams formed in said closed by-pass ports thereof may be effectively bonded together by pre-application of epoxy resin compound upon wall surface engagements constituting said seams and effecting a cure of said resin by application of heat and pressure upon the exterior of said wall surfaces.

4. A heavy duty container of the class herein described having four flat side walls arranged in opposing pairs with two opposing flat end wall portions thereof, said enclosure walls being provided by a telescoped assembly of two structurally stable preformed wall components made of bent metal sheet constituting said container, which comprises one structural component of said assembly having one pair of said opposing side walls, which walls have bent portions which form two opposite end walls, the top end wall thereof being integral of each of said one pair of side walls and having two opposed upwardly bent horizontal marginal wall portions spaced inwardly of each of two opposing pair of inwardly bent load bearing flanges disposed at right angles along vertical parallel corner edges of their corresponding wall, the bottom base end wall being formed of single bent portions of each of said flanged side walls, the bent portions being disposed in marginally overlapped surface bonded relationship and having opposed corner end edges disposed within confines of adjacent base abutted ends of one pair of said vertical flanges, which abutted ends including ends of the opposite pair of vertical flanges are disposed in edge to surface engagement with upper surface marginal border portions adjacent corner free side edges of the major bottom wall of said bent portions, the second structural component of said assembly having a second pair of said opposing side walls alternate of said one pair, the second pair having an integral end wall disposed upon the exterior surface of said base end wall of the one component including opposing pairs of right angularbent marginal flanges along longitudinal and horizontal opposed corner edges of corresponding walls and being disposed in surface engagement with corresponding marginal sides of said one pair of side walls, surface engagements of said end walls and marginal flanges being bonded together by heat and pressure cured epoxy and/or isocyanate resinous adhesive, said adhesive being previously applied upon seam formed surfaces, said alternate side walls each being provided with a bendable outer end wall forming panel, which panels co-act with said bent marginal portions of the top end wall that provide two opposed open by-pass ports for access into the interior of the container for insertion therein of apparatus with which said seam bonding of surface engagements is effected, said by-pass ports being adapted to be closed and sealed in a like bonding manner but, by self supported bent Wall portions and be exclusive of orifice means in the structure of said components of said container assembly with which to fill and dispense intended contents of the completed container.

5. A heavy duty container assembly comprising metal sheet bent in two pre-shaped rigid structures being cooperatively assembled together, each having basic wall portions that provide six rigid enclosure walls of the container, the inner disposed pre-shaped structure of the assembly consisting of two opposed side walls, which walls are provided with two opposed end walls, each of said two side walls being provided with a pair of opposed marginally bent flanges along longitudinal corner edges thereof having bottom end edges in abutment with upper surface wall portions of the bottom disposed end wall, the exterior surface of each flange being coplanar with vertical surface sides of free corner edges of said bottom wall, upper ends of said flanges being free and joined with right angular free edge portions provided by two parallel upwardly bent horizontal closable marginal wall portions of the top end wall, which top end wall is disposed centrally between said bent margins, the outer pre-shaped structure of the assembly consisting of two opposed alternate side walls having an integral bottom end wall exterior of the bottom end wall of said inner structure, and the alternate side walls having opposed marginally bent flanges along longitudinal corner edges thereof including two opposed horizontal edges of said integral bottom wall, upper ends of each said alternate side wall having a bendable wall panel cooperatively providing outer wall sides of two opposed open by-pass ports in said top end wall in order to provide access to the interior of the container with means with which the seams formed by said assembled preshaped structures are rigidly bonded together constituting said container, said by-pass ports being closed and sealed by marginal portions of said top end wall being bent outwardly and downwardly upon shoulder top corner edges provided by adjacent marginal flanges, each panel of said alternate side walls being bent inwardly and downwardly in alternate direction upon the upper face of said first bent wall portions, which portions provide uniformly flat lateral extensions integral of said top end wall and being disposed inwardly of an exterior flat end wall layer formed of said panels, said by-pass ports being sealed by bonded surface engagements ex- 15 clusive of means provided in said assembled pre-shaped structure of an orifice arrangement being adapted to provide filling and dispensing facilities for intended contents of said container.

6. In a rectangular container according to claim wherein the bottom end wall of said opposed end walls consists of two bonded wall layers being initially formed of bent portions of alternate pairs of said four side walls, portions of the upper surface of the upper bottom wall layer being overlapped and bonded together and provide a contiguously related buttress wall section there of and co-operate with an opposed embodied structural buttress bar being positioned and bonded within a lower interior corn-er section of the enclosure walls of said container, said structural bonded buttress portions being means with which to truss and reinforce vulnerable converging corner ends and corner side edges of said bottom end wall and adjacent side wall portions thereof, said buttress bar portion of said reinforcements providing a body housing in which said orifice means is arranged.

7. A heavy duty container made of metal sheet material and formed of an assembly of two pre-formed parts defined as being a first and second component structural portion of said container, which comprises the first component being bent of an elongated blank of said sheet material providing two opposite side walls and each side wall having a pair of inwardly bent flanges articulated thereto along longitudinal corner edges of the side wall, the top end of said two side walls being defined with an integral end wall having a pair of opposed upwardly bent transverse flange portions spaced inwardly of said side wall flanges and facing parallel therewith, and the defining top edges of said longitudinal flanges of the side walls being coplanar with top edge portions also of said side walls from which the transverse flanges are initially bent upwardly, the height of the end wall flanges being coincident with the space between its face and face of the side wall flanges, the bottom end of one side wall being defined with an inwardly bent marginal flange portion thereof having side edges in edge to surface abutment with inner corresponding face portions of said one side wall flanges, the bottom of the opposite side wall being defined with an inwardly bent bottom wall portion thereof that overlaps the bottom surface of the first mentioned bottom flange of said one side wall, the bottom ends of the longitudinal flanges of said two side walls abutting upon the upper corresponding surface portions of said inwardly bent bottom wall portion, said overlapping surface to surface engagement of the bottom portions of said side walls being secured together in seam forming relationship, the second component structural portion being bent of another elongated blank of said sheet material providing two opposite alternate side walls and an integral bottom end wall, said side walls and bottom wall each having a pair of inwardly bent flanges articulated thereto continuously along longitudinal corner edges thereof, said flanges being mitred by a substantially right angle notch which terminates slightly short of the adjacent articulated bent corner edge, and the edges of the notch forming mitred joints of said flanges upwardly and inwardly of the converging corner ends of side walls and bottom end wall, the top edges of side wallflanges being spaced downwardly of a bendable panel portion of each of said opposite side walls, the exterior surface of flange portions including adjacent exterior marginal surface portions of the side walls of the first component and exterior surface of its bottom wall being provided with seam bonding resinous adhesive in contact with corresponding surfaces of the interior surface of said flanges of the second component including adjacent interior surface portions of the alternate two side walls thereof, the exterior surface of the bottom wall of the first component being in contact with the interior surface of the bottom wall of the second component, said resinous adhesive forming a fillet of sealing material between said contacting surfaces of the first and second component parts of the container structure, said pair of transverse flanges of the top end wall of the first component and upwardly extended bendable portions of the two alternate side walls of the second component defining two outwardly spaced open ports that by-pass said top end wall of the container.

8. The container according to claim 7 wherein the bottom inwardly bent flange portion of said one side wall of the first component constitutes a buttress reinforcement between the bottom ends of one pair of longitudinal inner flanges of said one side wall, the bottom ends of the other pair of longitudinal inner flanges of the opposite side wall being reinforced by a buttress bar of material spaced between said pair of flanges adjacent the bottom edges thereof and exterior surface portions of said bar being secured upon corresponding interior surface portions of the lower surface portions of said flanges, bottom wall and transverse side wall, said buttress bar being provided with orifice means aligned with corresponding orifices through corresponding wall portions of the second component through which to fill and dispense the intended contents of the container.

9. The container according to claim 7 wherein the pair of said by-pass ports of the top end wall of the container provide means for temporary access into the interior of enclosure walls for apparatus with which a cure of said resinous adhesive is effected in seam forming relationship of said engaging surfaces of the first and second component structural parts of the container, after which, the pair of transverse upwardly bent flanges of the top end wall each being bent outwardly and downwardly upon said top edges of the two side walls and aligned top edges of flanges thereof, and the outer longitudinal edge of the bent flanges being abutted in edge to face engagement with the interior upper face of the opposing alternate side wall of the container, the interior surface of the upper projected wall portion of the particular alternate side wall being provided with resinous adhesive, and said wall portion being bent in wardly against said abutted edge of the first bent portion and downwardly upon a corresponding exterior surface portion of the closed top end wall of the first component in seam forming relationship.

10. In a heavy duty rectangular container of the class herein described constructed of flat rigid sheet material and the structure of the enclosure walls providing ca pacity for the container up to fifty five gallons of liquid commodity, which comprises six initially constructed enclosure walls formed of two strips of said sheet material, said enclosure walls consisting of four marginally reinforced side walls arranged in opposing pairs and opposite end walls formed integral with alternate side walls, one of said end walls being initially provided with a pair of open slots, each slot having opposite ends defined by outwardly projected ends of a pair of longitudinal flanges that define said marginally reinforced side walls, the transverse sides of each slot being defined by an inner right angle outwardly bent portion of said one end wall and an outwardly projected parallel portion of the side wall having said pair of flanges, each side wall that is integral with said one end wall having terminal end edge portions, each portion extending outwardly of the transverse face of said inner right angle bent portion of the end wall and further defining end edges of an opposite pair of inwardly bent longitudinal flange portions of each said side wall that is integral with one end wall, the surface of said end defining edges being coplanar with the interior surface of the integrally related one end wall, said last mentioned longitudinal flanges being secured upon corresponding interior surface of the pair of side walls having the outwardly projected parallel portion that defines the outer side of open slots, and the first mentioned longitudinal flanges being secured upon corree sponding exterior surface of the pair of side walls in: tegral with said one end wall, and the outwardly projected ends of secured flanges being spaced outwardly of the exterior surface of the one end wall, and the opposite side edges of each said inner right angle bent portion thereof being spaced outwardly of the longitudinal end edges of the first mentioned flanges.

11. In a container according to claim wherein said pair of open slots at opposite sides of the one end wall provide temporary access into the enclosure walls of the container, said first and second mentioned secured longitudinal flanges being compressed to constitute bonded seam portions of the enclosure wall structure of the container, said open slots being closed by alternate bent portions that define said transverse sides thereof including the effects of the outwardly projected portions of longitudinal flanges that define said opposite ends of the slots, the surface of said portions having prealpplied resinous adhesive thereupon, the closure thereby being effected in seam forming relationship, said :container being provided with orifice means for filling and dispensing of intended contents thereof exclusive of said closure of open slots.

12. In a container according to claim 10 wherein said first mentioned longitudinal flanges being provided with a hole in each flange adjacent top and bottom ends thereof thereby arranging said holes in pairs adjacent corner ends of the container enclosure walls, said holes being closed by the exterior surface of said side walls that are integral with the one end wall, said holes being provided to constitute pilots for pin engagement of enclosure wall clamping apparatus with which said container, when filled with intended product, may be lifted and handled.

13. A heavy duty rectangular container for liquid products and made of two elongated strips of bendable sheet material, each strip being bent to provide preshaped wall portions that are assembled together to form six enclosure walls of the container defining four longitudinal side walls arranged in opposing pairs and opposite top and bottom end walls formed of integral portions of a pair of alternate side Walls, which comprises each wall of one pair of said side Walls being provided with a pair of longitudinal marginal flanges bent inwardly at right angles along corner edges of the corresponding 18 wall of said alternate pair of side walls and bottom wall thereof being provided with a pair of longitudinal flanges having a mitred joint adjacent each converging corner end of the bottom structure of the container, the inner surfaces of said flanges being secured upon corresponding exterior surfaces of the first mentioned one pair of side side wall, the bottom ends of the flanges being disposed in edge to face abutment with said bottom wall that is formed of an integral bent portion of each said side wall and in overlapping relationship and being contiguously secured together, the upper portion of the bottom wall having side edges engaged in abutment with the interior surface of one pair of said longitudinal flanges and adjacent to their abutted bottom ends, the lower portion of the bottom wall that is integral with the opposite side wall, having parallel side edges in coplanar surface relationship with the exterior surfaces of both pair of longitudinal flanges and the end edge surface of the lower bottom wall portion being coplanar with the exterior surface of the side wall that is opposed to said opposite side wall, a bar of material being positioned and secured into the interior bottom corner end of said opposite side wall, and the opposite ends of the bar abutting to corresponding interior surface portions of the longitudinal flanges thereof, said secured bar constituting a housing having an orifice arrangement to be utilized for filling and dispensing purpose of container contents, the top ends of said longitudinal flanges being aligned with right angular top edge portions of the side walls terminating inwardly to the face of a transverse upwardly bent flange at opposite sides of the top end wall that is integral with said side walls, an alternate pair of side walls having an integral bottom end wall, being disposed upon said longitudinal flanges and said bottom wall being disposed upon the bottom surface of the other bottom wall, each walls, the exterior face of the flanges thereof being secured upon corresponding interior surface portions of said alternate pair of side walls, an upper wall portion of each alternate side wall and flange thereof, defining three boundary sides of a by-pass open port having a fourth boundary side thereof defined by said transverse up wardly bent flange at opposite sides of the top end wall of the container, said upwardly bent flanges being adapted to be bent outwardly and downwardly upon said top edge portions of side walls and flanges that are integral with said top end wall, the integrally related longitudinal flanges thereof constituting buttress supports for the top and bottom end walls of the container structure.

14. In the structure of a heavy duty rectangular shaped container made of'rigid bendable sheet material, said container being provided with four side walls arranged in opposing pairs and with opposite end walls combining six enclosure walls of the container structure, which comprises one of said end walls being provided to constitute the bottom:wall of the container and being constructed two-ply, a structural bar member being provided to augment reinforcement upon an interior surface portion of the upper layer of said bottom wall and having opposite flat ends thereof secured upon interior surface portions of a pair of opposite flanges integral of one side wall and the bottom ends of said flanges being abutted upon adjacent interior surface portions of said upper layer of the bottom wall, said member constituting a housing having orifices arranged through which to fill and dis pense intended contents of said container, the opposite top end wall of said enclosure walls having opposite side oblong shape openings constituting a pair of by-pass open ports providing access into the interior of said container for bar apparatus used in bonding the constructed seams of the container including cleansing and treating conditioning of interior surfaces of enclosure :walls independent of said orifice arrangement, each of said open by-pass ports being defined by an upwardly bent flange portion of the top end wall and outwardly spaced upwardly projected wall portions of an adjacent side wall and right angular bent flange portions thereof, each port then closed by said flange of the top end wall being bent outwardly and downwardly with its end edge abutting against the interior surface of said upwardly and outwardly projected wall portion of the adjacent side wall of the container, the bottom surface of the bent flange being disposed upon top ends of each pair of said flanges at right angles of the side walls that are integral with said top end wall including other top edge portions thereof, the exterior surface of said bent flange being spaced downwardly of top edges of a pair of flanges bent at right angles of the side wall opposing the end edge of the bent flange, said end edge-in face abutment constituting a bending ledge over which said upwardly projected wall portion of the opposing side wall is bent inwardly and downwardly upon the top surface of said bent flange including a portion of the coplanar top surface of said top end wall, the surfaces of said bent wall portions and their respective engaging surfaces having preapplied resinous adhesive whereby, said surfaces are secured together in permanently bonded liquid tight seam forming relationship thereby providing a uniformly flat wall layer over said top end wall.

15. The container according to claim 14 wherein said orifice arrangement housed in said structural member embodied within the interior of enclosure walls is provided with orifice defining holes communicating with the interior and exterior regions of the container, the exterior communicating holes being threaded to accommodate suitable liquid tight removable plugs, the flat structure of the side walls of the container being adapted-to permit the bundling of multiple duplicate containers compactly Secured together for economical storage, transportation and handling facility, said orifices being arrangedso that each container secured in said bundle may be filled and dispense its intended liquid content independently of the adjacent alternate containers.

16. In a rectangular shaped container having four marginally reinforced and secured side walls arranged in opposing pairs including opposite end walls formed of integral portions of the alternate pairs of said side walls comprising one of said end walls that -is integral with onepair'of said side walls being provided with a pair of inwardly spaced up-turned marginal flange portions of the one end wall, said flanges being parallel with each other and positioned transversely between'said integrally related side walls therebydefining a pair of parallel open slots at two opposite sides of said end wall, 'sai d' slots having other boundary sides defined with bendableouter wall portions provided by the alternate pair of side walls of the container structure, said pair of open slots providing means for access into the interior o'f'the enclosure wall structure of said container of searnforming apparatus and said slots permitting the cleansing and/or treating of the interior wall surfaces of the containerin general, said up-turned marginal flanges and the other bendable boundary defining sides of the open slots being constituted, when bent in alternate directions, to close said slots, the first bent marginal flange portions providing means to restore the fullwidth of said one end wall-to bridge in uniform thickness between the alternate pair of opposing side walls, and each of the alternate second bent wall portions being arranged to completely overlap the exterior surface of the corresponding first bent flange including a portion of the exterior surface of the one end wall inwardly of said flange whereby said slots may be closed 'and 's'ealed in seam forming relationship, and the closure forming bent wall portions engaging in coplanar wall surfacerelationship. 17. A generally elongated blank of substantially rigid sheet material cut to define wall panel areas adapted to be bent and form enclosure wall portions of a rectangular shaped container, said blank comprising a central panel area beingdisposed between two outwardly and laterally opposed'pan lareas, said central panel being defined with two parallel bend lines that are transverse of ,two parallel longitudinal bend lines disposed inwardly of outer longitudinal end edges defining a pair of bendablelflanjge portions of'the central panel and having opposite end side edges slit from the adjacent lateral panel areas,.each of said'opposed lateral panels being defined with two parallel longitudinal bend defining linesextending between two transverse bend defining lines, one of which transverselines defines a boundary side of saidcentral panel transverse of its bendable flange portions,. each saidflateral extended panels beingprovided with a pa ir of parallel bendable marginal flanges disposed outwardlyof'saidlongitudinal bend defining lines and the opposite end side edges of the flan'geportions being sub stantially in line with the transverse. bend defining lines of .each lateral panel, the inner disposed end side edges of said bendable flange portions of the lateral panel areas "of the blank 'be'ing substantially disposed in li ne said slit end; side edges of the flange portions of said central panel and theoute'r longitudinal edges. of the central-flange portrons being'spaced inwardly ofthe outer longitudinal edges of the flange portions of said lateral extended panels so that said inwardly spaced edges ofthecentral panel flange portions are disposed slightly outward-of said longitudinal bend defining lines of the marginal flange portions of the lateral extended panels, the outer defining end of one of' said lateral, panels being provided with an outwardly projected transverse bendable flange having a bend line that defines the outer end 'of said 20 lateral panel, the outer end side edges of the bendable longitudinal flange: portions thereof being substantially disposed in line with saidbend defining line of--said--pro-; ject'ed transverse flange portion, the outer end of the otherand oppositelateral extended panel being provided with a full size bendable end forming panel area that is projected outwardly of'the transverse bend defining line that is substantially in alignment with the adjacent outer end side edges of the bendable longitudinal flange portions of said other lateral panel area ofthe blank.

18. A container structural component formed of the blank of claim 17 wherein said longitudinal flange portions of the two outwardly opposed lateral-panels of -the blank being bent on their respective bend defining lines downwardly at 'right angles tothe corresponding panel wall, said end defining outwardly projected transverse flange portion of one lateral panel wall of the blank being bent downwardly at right angles thereof with opposite side edges of the bent flange abutting upon a corresponding inner surface portion of one pair of the adjacent longitudinal-bent'flanges of said one panel, said opposite outwardly projected full size endforrning panel of the other opposing lateral'panel wallbeing bent downwardly at right angles thereof and inner surface portionsof said bent panel engaging with the abutting end side edges of the adjacent pair ofbent longitudinal flanges of said other paneL; the exterior face of said longitudinal flanges of panel walls being coplanar with the surface of two opposite side edges of-said full size bent end forming panel, the defined flange portions of said central panel wall portion of the blank being bent upwardly at right angles of the corresponding wall, said two lateral panel wall portions. of the blank being bent downwardly at right angles from opposite corner edges of said central panel wall so that surfaces of the opposite end side edges of the upwardly bent pair of flanges of the central wall are disposed in coplanar surface relation with the exterior surfaces of the bent opposing panel walls, the adjacent end side edges of the inwardly opposed pairs of longitudinal bent flanges of said panel walls including free edge portions of the bent panel walls being disposed in coplanar surface relationship with the interior surface of said centralpanel end wall having the upwardly bent flanges, the topplongitudinal end edges of said pair of bent flanges of the jcentralpanel end wall of the structure being adapted, when said flanges are bent outwardly and downwardly, to face ceplanar with the exterior face of the inwardly opposed pairs of the longitudinal bent flanges of the two transversely bent panel side walls, the opposite end bent flange and full size end panel of said side walls being disposed marginal surface overlapping and secured relationship, said, defined structure in general constituting a component part todbe used in the construction of a rectangular shaped container.

l 9.,A generally elongated blank of substantially rigid sheet' materialcutto deflnewall panel areas adapted to be hent and form enclosure wall'portions of a rectangular sh d container, saidblank comprising a central panel being disposed between .two outwardly and laterally opposed panel areas, said panel areasbeing defined as havingtwo parallel continuously extended, longitudinal benddefining lines and-paralleltransverse bend lines, an inner, pair of ,said. transverse. lines defining two, boundary sides of said central panel area and each of two outer transverse linesdefinin gtthe outer boundary end of each outwardly opposed laterally extended panel area, each of the iopposite ends of said blank being provided with a bendablepanel portion defined outwardly of said outer transverse boundary end linev of panel areas, the opposite side edges. of said bendable panel portions being disposed slightly inward of the longitudinal bend defining lines of said'panel areas, which panel areasare each provided with a pair of opposite and bendable marginal flange portions defined outwardly of said longitudinakbend lines of the central and laterally extended panel areas, each pair of said marginal flanges being partially separated from the other pair by a right angular notch centered on terminal ends of each transverse bend line of one pair of parallel lines that defines two opposite boundary sides of said central panel area, the apex of said notch being slightly blunt and spaced slightly outward of the longitudinal bend lines of said flanges, the outer straight end side edges of the margin flange portions of each laterally extended panel area being disposed slightly outward of the bend defining line of each said bendable end panel portion of the blank, said straight end side edges being parallel with said bend defining line, the opposite parallel side edges of each of said end panel portions being extended slightly inward of the adjacent transverse straight end side edges of the marginal side flange portions of the adjacent lateral panel areas.

20. A container structural component formed of the blank of claim 19 wherein said marginal flange portions of the central and laterally extended panels being bent uniformly at substantially right angles from the parallel longitudinal corner edges of the corresponding panel walls, said two laterally opposed panel wall portions of said blank each being bent at substantially right angles from a corner edge of said central panel defined by said inner pair of transverse boundary lines, transverse of flange portions thereof, said notches of the marginally bent flanges being closed with edges abutting in mitred joint relationship so that both inner and outer surfaces of said flanges are disposed in coplanar surface relationship with each other, the outer straight end edges of the inwardly opposed pairs of longitudinal bent flanges being spaced slightly outward of the inner terminal ends of the parallel side edges of said laterally extended bendable end panel portions so that the exterior surface of each of said parallel side edges of the end panels are disposed substantially coplanar with the interior surface of each of the adjacent transverse longitudinal flanges, said defined structure in general constituting a component part to be used in the construction of a rectangular shaped container.

References Cited in the file of this patent UNITED STATES PATENTS 2,056,192 Hothersall Oct. 6, 1936 2,253,499 Rutenber Aug. 26, 1941 2,488,710 Cooper Nov. 22, 1949 2,712,880 Moore July 12, 1955 2,717,094 Moore Sept. 6, 1955 2,731,167 Moore Jan. 17, 1956 2,741,390 Moore Apr. 10, 1956 FOREIGN PATENTS 9,560 Great Britain of 1905

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