2,413,646 Patented Dec. 31, 1946 ' UNITED STATES PATENT >oElFIcE ' Loox 'rop- coN'rAmEa ~ Frank J. O’Brien, Pelham Manor, N. Y., assigner to Continental Can Company, Inc., New York, N. Y., a corporation of New York Application December 28, 1944, Serial No. 570,185 I 2 Claims. (Cl. 220-73) l The present invention relates to improvements in metal containers, and more particularly to a metal container having a lock top closure there for. ` An impor-tant object of the invention, is to pro 2 and comprises a body portion 6 to which a bottom end -I is secured in the usual manner. The body portion 6 is preferably cylindrical and its upper end 8 is left open and is adapted to be closed by means of the lock top or cover generally desig vide the upper end of the container with a nated by .the reference character A. . smooth even surface -to facilitate sealing when The upper end 8 of the body portion is offset inwardly to form a shoulder 9 and an annular , the closure is positionedV thereon. Another object of the inventionv is to provide the rim IIJ. The rim I0, during the fabrication of upper end' of a container with a double seamed 10 the container, is formed with a flange I I extend collar or ring for the purpose of producing a rela tively wide smooth and even sealing surface for a compound lined cover or top. ing at right angles thereto, adapted to be .bent downwardly during the' seaming operation. A drawn metal ring l2. is positioned within the A further object of the invention is yto provide upper end of the -body portion 6 being confined a container of the above type wherein the collar 15 by the annular rim I0 thereof, which ring is or ring ñts within the upper end of the container formed with a flange I3 extending at right anglesl and is double seamed thereon to form .a rigid, to the container and substantially parallel with smooth surface around the top edge of the con tainer to facilitate sealing when the -closure is applied thereto. tioning the ring within the container a spinning 20 operation is performed in order to cause the The above and other objects of the invention will in part be obvious and will in part be here inafter more fully pointed out. In the drawing: the flange Il, as shown in lFigure 2. After posi- " , lower end I4' to follow the shape and contour of the shoulder 9 and at the ‘same time be brought into tight bearing engagement with the.entire upper end of the body pcrtion.- . Figure 1 is a side elevational View, partly in 25 The container 6 with the ring I2 firmly `held section, of a container embodying the features therein is then subjected to a double seaming of the present invention. operation to provide the construction shown in ' Figure 2 is an enlarged fragmentary detail sec Figure 3. By this double seaming operation .the tional view illustrating the position of the ring flangeJI is bent downwardly to a position sub relative to the container prior to the double seam 30 stantially parallel with the rim III and the ñange ing operation. ’ I3 is bent downwardly and upwardly so that the Figure 3 is a similar view after .the double ‘ end I 4 thereof is positioned between the down seaming operation has been performed. .turned flange II and rim II) as clearly shown in Figure 4 is an enlarged fragmentary detail sec Figure 3. This double seaming of the ring I2 on tional view with the cover locked on the‘con the upper end of the container provides a more tainer. , rigid construction and at the same time produces In the manufacture of containers,f it is essen a relatively Wide, smooth and even surface I5 for tial that closure means be provided which will the closure A to be sealed thereon. In other tightly- seal the open end of -the container. In lwords, there are no stepped or uneven surfaces vmetal containers, such as cans,»it is conventional 40 which would tend to produce a faulty seal when to employ a side seam extending longitudinally a lock top closure is applied to the upper edge of through the length of the can and including a the container.' i ’ lapped portion at least _at the upper end portion The type of closure used with the new and of the seam, and when the upper edge of the can improved container is well known in the art and is rolled to form a seat for a closure, this double 45‘genera1ly comprises a body IISv that is depressed thickness lap seam creates an open space or centrally to form a central body portion I'I and uneven surface through which leakage is liable to a heel I8 which fits within the ring I2 and co occur. In order to obviate this possibility, -the operates with the skirt portion I9 in forming an present container is provided with a seamless annular channel 20. The skirt I9 is dimensioned ring which- isv rolled on the top edge of the con 50 .to ñt’closely about the body wall of the con tainer to form a smooth even surface for a corn-_ tainer, and the end thereof is bent outwardly pound lined cover. ' . and'inwardly at right angles to form an annular Referring .to the drawing for a more detailed stiifener hem‘ 2I. The annular channel 20 car description thereof, the improved container is ries a sealing compound B for sealing the con generally designated by the reference numeral 5 55 tents of the container when the cover- is locked 2,41 3,646 3 thereon. 4 through the medium of the spaced thread por tions 22 formed on the body just below the offset > ' a central depression surrounded by a cylindrical y wall and a depending skirt spaced outwardly from 9 and which are engaged by complementary .thread portions 23 formed on the cover. A slight rotation of the covex` will cause the thread por tions 23 to engage the thread portions 22 forlock ing the cover in position on the upper end of the ' . metal ring forming 4at the upper end of the seam a continuous unbroken rounded sealing surface, a closure for -said container, said closure having The cover is locked on the container said cylindrical wall and joined thereto by a curved portion conforming to the curvature ofi. the sealing surface on the drawn ring, a sealing gasket disposed in said closure and engaging' the container, With the cover in locked position, the sealing 10 sealing surface on the ring, and means for me chanically securing the skirt of the closure mem ber to the body of the container for holding said closure member in sealing' contact with the body. effectively sealing the contents of the container. 2. A metal container comprising a body having ‘5 The upper end of the-container is reinforced by reason of the double seamed ring thus withstand .15 an open upper end, said open end portion being oiîset inwardly forming in said body a shoulder, -ingeconsiderable pressure in the application of a drawn metal ring fitting within the open end the closure` without any appreciable distortion. 'of the body and closely contacting said shoulder, The surface I5 is suiliciently wide and smooth to compound I9 will follow the contour of the sur face I5, which surface is smooth and rigid, for .said Imetal ring being ‘extended outwardly overr accommodate the sealing compound held within the'channel 20 so that the contents of the con tainer will be eñectively sealed. ' M 20 the- -body wall and rolled into a double seam with the body wall, said drawn metal ring forming at While a preferred embodiment of the invention has been shown and described, it is to be under- . stood that the, invention is not limited to the , the upper end of the seam a continuous unbroken rounded sealing surface, a closure for said con illustrated embodiment -but may be variously tainer, said closure having a central depression surrounded by a cylindrical wall and _a depending modified without departing from the spirit and ,_ _ skirt spaced outwardly from said cylindrical wall and joined thereto by a‘curved portion conform; 4scope of the invention as defined in the appended claims. What I claim is: V _ , 1‘. A metal container comprising a body having an open upper end, a drawn metal ring fitting "so ing tothe curvature of the _sealing- surface on the drawn ring, a sealing gasket disposed in said closure and engaging 'the sealing surfaceon the ring, said depending skirt being extended below within the open end of said body and extending .the lshoulder in the body wall and having a outwardly over the body wall- and rolled into a threaded connection with said body wall. double seam withthe body wall, said drawn ' _ FRANK J. O’BRIEN.