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Publication numberUS2656066 A
Publication typeGrant
Publication dateOct 20, 1953
Filing dateNov 23, 1949
Priority dateNov 23, 1949
Publication numberUS 2656066 A, US 2656066A, US-A-2656066, US2656066 A, US2656066A
InventorsRiemenschneider Edmund W
Original AssigneeUnion Metal Mfg Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Metal box rim construction
US 2656066 A
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Description  (OCR text may contain errors)

Get. 2Q, 1953 E. W. RHEMENSCHNEIDER 2,656,036

METAL BOX RIM CONSTRUCTION Filed Nov. 25. 1949 i mmvme. a Edmund Wfizemeizwfimw ATTCWNEYS Patented Oct. 20, 1953 UNITED STATES PATENT OFFICE METAL BOX RIM CONSTRUCTION Edmund W. Riemenschneider, Hartville, Ohio, assignor to The Union Metal Manufacturing Company, Canton, Ohio, a corporation of Ohio Application November 23, 1949, Serial No. 129,065

3 Claims. 1

The invention relates generally to sheet metal material handling boxes, and more particularly to a beaded rim construction for such boxes adapted to be supported on skids or pallets.

A primary requirement of material handling boxes is that they have maximum strength for minimum weight because they are subjected to heavy loads and rough handling, but should be light in weight so as to add as little as possible to the weight of the material contained therein. The requirement of minimum weight is especially important in cases where the boxes are shipped via train or truck so as to transport a maximum pay load.

Another important requirement is that the boxes be adapted for tiering or stacking in a stable condition, because it is common practice to tier skids or pallets each carrying such a box, for conserving space in storage and transportation.

A further requirement is that such boxes must be simple and inexpensive to manufacture, so as to add as little as possible to the manufacturing cost, and to handling and shipping costs, of the articles transported in the boxes.

Material handling boxes of this type are conventionally made of light gauge sheet metal having corrugations in the side walls for increasing their strength, and the most economical way of forming the box is to start with a corrugated strip and bend it at right angles in dies to form the side walls and corners of the box. The top rim of the box is ordinarily formed with a flat bead prior to bending so as to provide a fiat top rim to facilitate tiering of the boxes. However, it has been an extremely diificult problem to construct a bead which can be bent or formed at right angles around the corners of the box and still provide the required fiat top rim after bending.

Accordingly, it is a general object of the present invention to provide a continuous bead construction which can be formed or bentaround the right-angled corners of a sheet metal box and still provide a substantially fiat top rim suitable for tiering.

In attempting to solve this problem, it was first attempted to form along the edge of the strip a right-angled flange which consisted of a reversely bent or folded-under portion, which was intended to give a fiat or horizontal rim around the finished box. However, the excessive stretching of the metal at the outer folded edge of such a folded rim flange, during the bending of the metal around the box corners, caused cracking or breaking of the metal in the folded portion at the corners, and also caused the top wall of the rim 2 to angle or warp up or down at the corner portion.

Obviously, these difiiculties with cracking and distorting due to stretching of the metal can be overcome by providing a joint at each corner in the rim or bead, but such a joint requires an additional manufacturing operation, and greatly decreases the strength of the rim as required for tiering purposes.

It was next attempted to provide a rolled circular bead along the edge of the strip, and this eliminated some of the cracking at the corners, but did not provide a flat top rim for tiering; and also when bent around the corners this bead was flattened or squeezed laterally to an egg shape which distorted and further narrowed the top of the rim.

Finally, a bead constructed according to the present invention was invented and constructed, and when tested was found to overcome the difficulties experienced with the prior constructions, and to accomplish the following specific objects.

It is an object of the present invention to provide a rim construction for a rectangular material handling metal box including a continuous bead having a flat top and extending around the corners on a small radius.

Another object is to provide an improved continuous bead extending around the upper end of a rectangular metal box and bent around the corners on a small radius without any cracks or breaks in the bead corner portion.

A further object is to provide a rim construction for a rectangular metal box comprising a continuous bead having maximum strength with a minimum amount of metal.

Finally, it is an object of the present invention to provide a rim construction for a rectangular metal box consisting of a continuous triangular bead with a fiat top extending around the corners on a small radius, the skirt of the bead permitting stretching of the metal in the outer edge of the bead at the corners to maintain a flat top portion around the corners without excessively straining the metal of the bead at the corner portions.

These and other objects are accomplished by the parts, elements, beads and box rim constructions comprising the present invention, a preferred embodiment of which is shown in the accompanying drawing and described in the following specification as exemplifying the best known mode of carrying out the invention, the invention being set forth in general terms in the following general statement, and the scope of the invention being defined in the appended claims.

aeaaoec In general terms, the rim construction comprising the present invention may be set forth as including, in a rectangular heet metal box, a continuous integral rim extending around one end of the box and consisting of an out-turned flange at right angles to the side walls of the box, said flange being turned downwardiy at its outeredge and rm d in o. a dow rd ncl ned. k r portion terminating at the side walls of the box, the out-turned and downwardly inclined flanges, forming with the box side walls a triangular bead, the out-turned flange forming a flat top rim extending continuously around the eorners of the box on a small radius, and'the. inclined skirt p ermitting stretching of the me t therim portion around the corners of the box without subjecting the rim portion to excessive strains causing cracks or breaks therein.

Referring to the drawing forming part here- QL: i 1. 92 a Pr e r d. mb d inen of. .1 vi icn. i sh wn. by w i ampl Eiglure' 1 s a fragmentary perspective view of a exter r co ner, of: a m t mat r a hand in rename the m iqre con uo s. n u ar has q str ction. aro nd. ts, uppe e d;

Fis. 2. an mer d; itasmcnta y s ctional view'th'rough the bead and its adjoining side wal -a ree F s Fig; 3 is a, similar f gmentar sectional view thr ugh the c rne portion f the head. as. on 1. 1 &3, a 1;, and.

' his, 41. is. a'irasme tary p a eva ona iew. partly section, or the.v corner portion of the bead.

Similar numerals refer to similar parts throughout the several views of the drawing.

The mpr yed r an ula bead is shown, by way of example as a continuous top rim on a recaneul cor ugate sheet meta sk d box indicated, generally at It, in Fig. 1. The skid box may ha e cont uo s cor u ti ns extending a iqk ldfiheside wal s 2, an c rne s. the 9 and, the side walls, may. have in turned, bottom sa s. L3. ri ic f m. be eled. m t L at he corners when the side walls are bent at right eng esrtq each qther- Themetaibox, [dis-adap 0 e. used. a a. mat r al. hand o 1s ndie ono lsk dor platform, d s ne to bera'i'sed' by a, in; truck, b t itwill be. under stood that the improved rim construction of the R test. nven i n. h pli o other tangular metai material handling boxes, requirin g a fiat rim around their upper ends.

As shown in Fig. 4, the corners. l5, of the box are formed on a relatively. small radius so. that the right-angle bends, forming corners between theside walls I; are quitesharp to provide. a maximum of; space in the corners of thebox for the storage of material. The. radiusof. the iner surface I5 of the, corners maybe approximately one-half inch. Referring toFig. 2, the u e tf im 07f! tlilg .98. Q i FS triangular hea wbi s n n uiurned i flange l6 integral with and formed at right angles to the side, wall I z with the, outer edge. portion of the flange bent at IT downwardly under. said flange and merging into a downwardly inclined skirt'fiang e la which, preferably treminates at the side wall L2 and substantially engages its outer surface. 'Iihis bead isformed continuously along one edge, of the corrugated sheet from which the box ismade, before thesheet is bent atright angles atthe corners I5 to form a rectangular-box, so that the box can be; most economically-made from a corrugatedsheet merely 4 by forming the continuous triangular bead along one edge and discontinuous in-turned flanges I3 along the other edge, and then bending the strip in complementary V dies to make the corner bends and form the rectangular box.

If it were attempted to form the triangular bead portion after the corner bends are made, the corner portions of the bead could not be formed without cracking or breaking the metal in the outer edge of the bead, due to the excessive stretching of metal around the corners which would be required, and if the triangular head was fonned with a joint at each corner, the strength of the head in respect to supporting loads, as in ti ering; a plurality of skids and boxes would be so greatly diminished as to require expensivereinforcement.

By. making the continuous triangular bead in the cross-sectional shape shown in Fig. 2, when the corrugated sheet with the bead preformed thereon is bent at the corners I5, the cross-sectionalr shape of; the bead becomes somewhat distorted as shown in Figs, 3 and 4, but the metal at, the outer bend H- does not crack and. the width of flat horizontal surface provided by the top flange corner portion I6 is substantially the same as, in the remainder of the rim portion 1-6. Moreover, the triangular bead hasbeen found to be at least as strong for the same amount of metal as a. rolled circular bead.

'Ijhe, stretching of the metal around the outer edge portion of; the head at the corners is absorbed largely by the skirt flange i=3, which due to its downward inclination and its free bottom edge can warp or neck inwardly toward the corner portion l5 of; the side walls as indicated at l;8f. The resultisthat the lower portion ofthe skirt hugsthe corner 15 as indicated at H! and the nr etal in the outer edge portion H of the b ad draw nwardl d. sli h ly d wn r into hesls t Whi e he-metal bet n h e a l, nd th an e 1 a he ne rn also draws inwardly a slight amount as indicated, at L9. the triangular bead shown in Fig, 2. can. be bent. around, the corners l5 on anv inner; radius of about one-half inch, without sub ctin he. metal in the rim to excessive stramscausing, cracking and. warping, of. the to! la eh As} shown in,Fig. a the rnetalin-v the sidewalls LL adjacent to. the. top inner corner portion [9 maybecomeslightly. stretched outwardly of. the corner to. form shallow concave. portions 20 in thaside wallsbut these concave portions. are so slight; that, they. do not materially affect. the shape or strength, of, the box.

In; the foregoing,' description, certain terms have been: usedg for-brevity, clearness and underbut no. unnecessary limitations. are to v therefrom, beyond the requirements qfgthe orart, because such; words are usedlfor despnia i e; 11929 9 f lfii and n d. to be broadly construed.

he; mb d ment 1 m roved qns ructi n. llustr t d, and e cr be ei bywayi example. and-thescope ofthe present invention.- is not; limited to the exact: detailsof construction.

Havingnow' described the invention, the construction, the-operation and use-of a preferred embodiment thereof; and theadvantageous new and: usefulresults; obtained thereby; the new and useful methods and constructions, and reasonable mechanical equivalents thereofobvious 5 to those skilled in the art, are set forth in the appended claims.

I claim:

1. Rim construction for a rectangular mate rials handling box having sheet metal side walls integrally bent at right angles to form a relatively sharp corner between adjacent (side wall, including a continuous, integral, flat-top, rim bead, generally triangular in cross-section, at the upper ends of said side walls and sharp corner; said triangular rim including, a top flange portion extending outwardly from and at right angles with respect to each adjacent side wall, a top rim corner flange portion integrally continuous with and connecting said top flange portions above the sharp corner between said adjacent side walls, each top flange portion being turned downwardly at its outer edge and then downwardly inwardly as an inclined skirt flange portion terminating at its connected side wall beneath said top flange portion, the top rim corner flange portion being turned downwardly at its outer edge, then downwardly inwardly as an inclined corner portion and then downwardly along, around and contiguous with the sharp corner between adjacent side walls as a skirt corner portion, said inclined and skirt corner portions being integrally continuous with and connecting said adjacent inclined side wall skirt flange portions, the metal at the place of merger between the side walls and the top rim corner flange portion being displaced slightly inwardly with respect to the sharp corner, and the side wall metal immediately below said place of merger being displaced slightly outwardly with respect to the sharp corner to form shallow concave portions.

2. Rim construction for a rectangular materials handling box having sheet metal side walls integrally bent at right angles to form a rela tively sharp corner between adjacent side walls having an inner radius of about one-half inch, including a continuous,. integral, flat-top, rim bead, generally triangular in cross-section, at the upper ends of said side walls and sharp corner; said triangular rim including, a top flange portion extending outwardly from and at right angles with respect to each adjacent side wall, a top rim corner flange portion integrally continuous with and connecting said top flange portions above the sharp corner between said adjacent side walls, each top flange portion being turned downwardly at its outer edge and then downwardly inwardly as an inclined skirt flange portion, the top rim corner flange portion being i turned downwardly at its outer edge, then downwardly inwardly as an inclined corner portion and then downwardly along, around and contiguous with the sharp corner between adjacent side walls as a skirt corner portion, said inclined and skirt corner portions being outwardly concave around said sharp side wall corner and being integrally continuous with and connecting said adjacent inclined side wall skirt flange portions, the metal at the place of merger between the side walls and the top rim corner flange portion being displaced slightly inwardly with respect to the sharp corner, the side wall metal immediately below said place of merger being displaced slightly outwardly with respect to the sharp corner to form shallow concave portions, and the inner zone between the side walls immediately below said place of merger having a larger radius than the remainder of the corner portion.

3. Rim construction for a rectangular materials handling box having sheet metal side walls integrally bent at right angles to form a relatively sharp corner between adjacent side walls having an inner radius of about one-half inch, including a continuous, integral, flat-top, rim bead, generally triangular in cross-section, at the upper ends of said side walls and sharp corner; said triangular rim including, a top flange portion extending outwardly from and at right angles with respect to each adjacent side wall, a top rim corner flange portion integrally continuous with and connecting said top flange portions above the sharp corner between said adjacent side walls, each top flange portion being turned downwardly at its outer edge and then downwardly inwardly as an inclined skirt flange portion, the top rim corner flange portion being turned downwardly at its outer edge, then downwardly inwardly as an inclined corner portion and then downwardly along, around and contiguous with the sharp corner between adjacent side walls as a skirt corner portion, said inclined and skirt corner portions being outwardly concave around said sharp side wall corner and being integrally continuous with and connecting said adjacent inclined side wall skirt flange portions, and the metal at the place of merger between the side walls and the top rim corner flange portion being displaced slightly inwardly with respect to the sharp corner.

EDMUND W. RIEMENSCHNEIDER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 264,347 Sexton Sept. 12, 1882 845,596 Thieler Feb. 26, 1907 1,112,943 Stone Oct. 6, 1914 1,297,419 'I'hackray Mar. 18, 1919 1,572,492 Kempter Feb. 9, 1926 1,582,541 Ringer Apr. 27, 1926 1,620,931 Weber Mar. 15, 1927 1,844,401 Kraeft Feb. 9,1932 1,901,022 Chandonia Mar. 14, 1933 1,934,220 Willson Nov. 7, 1933 2,032,532 Eck Mar. 3, 1936 2,217,987 Langel Oct. 15, 1940 2,228,494 Wilson Jan. 14, 1941 2,285,275 Harder June 2, 1942 2,447,022 McCarl Aug. 17, 1948 2,550,804 Gordon May 1, 1951

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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3004685 *Aug 1, 1960Oct 17, 1961Hennies Engineering CorpDisposable pan
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EP0534230A2 *Sep 9, 1992Mar 31, 1993Fritz Schäfer Gesellschaft mit beschränkter HaftungTransport and/or storage container of sheet metal
Classifications
U.S. Classification220/658, 220/669
International ClassificationB65D1/40, B65D1/46, B65D21/02
Cooperative ClassificationB65D7/44, B65D21/0211
European ClassificationB65D7/44, B65D21/02E2