US1713675A - Process of making containers - Google Patents

Description

May 21, 1929. R. L. PARISH PROCESS OF MAKING CONTAINERS Filed May 2 1928 Patented May 21, 1929..

I "1,713,675- PATENT OFFICE.

RICHARD L. PARISH, OF CHICAGO, ILLINOIS, ASSIGNOB TO AMERICAN FLANGE 8:: MANUFACTURING 00., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PROCESS OF MAKING CONTAINERS.

Application filed May 28,

My invention relates to a method of making containers and to the containers themselves which employ walls madeof metallic sheet material curled into cylindrical or 6 curved shape, such containers also usually having sheet metal end walls, though the invention is not to be limited thereto.

It has hitherto been the practlce to abut the ends of the metallic sheet which is curled to form a cylindrical or curved contalner wall and to weld such abutting ends together. In carrying out inventlon, I join the engaging ends of such a curled sheet by forming these ends with interleavlng or R inter-meshing continuatlons. ThlS construction is not in itself leak -;proof wherefore I make it leak proof by providing a bodyor lining of sealing material-{between such 1nterleaving continuations. Thisl- -sealmg ma- 0v terial is preferably initially liquid and is applied before the joint between the edge portions of the metallic sheet s completed. During the process of completing the oint, the body of sealing material is squeezed and forced to flow into and to fill the crevices through which leakage would other- Wise occur.

The invention will be more fully explained by reference to the accompanying W drawing in which Fig. 1 is a perspectlve view illustrating a drum or barrel made in accordance with the preferred embodiment of the invention; Fig. 2 is a perspective view of a portion of the drum at one stage in the construction thereof, the joint between the adjacent edge portions of the curled metallic sheet being only partially formed and the body of sealing material being located in a position from which it is spread when an the joint is completed; Fig. 3 is a view similar to Fig. 2 illustrating the joint completed; and Fig.4 is a sectional view on line 4-4 of Fig. 1, on a larger scale.

The container illustrated is in the form of a barrel or drum of the kind which is commonly used for packaging oil. This container is composed of three sheet metal portions 1, 2 and 3. The sheet metal portion 1 is curled into a generally cylindrical shape,

to the meeting edge portions of the sheet being margined by joint forming continuations 4 and 5. These continuations extend lengthwise of the barrel or drum and terminate at the barrel ends. The continuation 4 is returned to lap the wall and is spaced 1928. Serial No. 281,275.

apart from the wall so that it, together with the adjacent portion of the wall, is U- shaped in cross section. The continuation 5 is continued beyond the wall portion from which 1t springs and is 'U-shaped in cross section to snugly receive the joint forming cont nuation 4, the terminating part of the continuation 5 being next the curved wall of the barrel and being snugly received between the continuation 4 and the barrel. During the process of manufacture the portions 4 and 5 are initially radially disposed, the portion 5 being so much wider than the portion 4 as to fully embrace it when the formation of the joint is completed as indicated in Figs. 3 and 4.

In the stage of construction illustrated in Fig. 2, the longitudinal edge of the continuation 4 and the adjacent portion of the face of the continuation 5 that is inwardly beyond the continuation 4 form a pocket into which sealing material 6 is squirted, this sealing material being initially liquid and of such a nature as to become sufiiciently hard to be held in place shortly after it is applied. According to one formula, the material of which the sealing material is made may be inclusive of the following, by weight:

Per cent.

Ceylon crepe rubber 46.6 Precipitated calcium carbonate 46.6 Zinc oxide powder Sulphur Tetra methyl thiuram disulphide .3

A quantity of benzol e ualin the a regate weight of the abri ve ingredieirs is added thereto. The sealing material is initially liquid and is squirted upon the parts 4 and 5 to form a unitary structure therewith. During the step which-is taken to complete the joint from the stage shown in Fig. 2 to the final stage shown in Figs. 3 and 4, the body of sealing material 6 is caused forcibly to flow into all of the crevices and spaces which intervene between the contmuations 4 and 5 of the-edge portions of the curved wall of the barrel, there being an excessive quantit of sealing material to insure this result. s a consequence, a leak proof joint is established between the meetmg edge portions of the curved wall of the barrel, th1s joint being permanent and sufiino ciently-flexible by reason of the sealin material which remains in a sufiicientlg condition to maintain the leak proo c aracter of the joint even though there may be slight relative movements of the. parts composing the joint thatmay arise during shipment and handling, a result which is not assured where the meeting edges -of the curved wall are butt'weldedto ether. The curved wall of the barrel may e formed with the usualrolling hoops 7 and may be provided with flaring cirfiular continuations8 which may be 'oined with the end walls 2 and 3 in accor ance with common practice. Wh re the flaring continuations 8 are employe the meeting edges thereof at 9 may be effectively butt welded. By way of recapitulation, it will be observed that I have employed a method of forming curved container walls which consists in curling a sheet of metal to bring opposed edges thereof in meeting relation, forming continuations upon the meetin edge portions of such container wall which initially extend inwardly and are side by side and which extend along such meeting edges from end to end of the container, one of these continuations being sufiiciently wider than the other to be formed into U-shape in cross section whenecurled over the other, placing a body of sealing material upon the wider of said two continuations and at the inner longiastic miners tudinal edge of the other continuation, curling the wider the two continuations over the other, and curling both continuations close to the container wall and squeezing the sealing material into the spacing between and extending along the continuations.

Having thus described my invention, I claim:

The process of forming curved container walls which consists in curling a sheet of metal to bring opposed edges thereof into relation; forming continuations i the other; and curling both continuations close to the container wall and squeezing the sealing material: into the spacing between and. extending along the continuations.

In witness whereof, I hereunto subscribe my name.

RICHARD L. PARISH.

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