US300548A - Assigxoe of one - Google Patents

Description

(No Model.)

W. WILSGN, Jr.

METHOD V0E MAKING SHEET METAL SANS.

No. 300,548. Patented June 17, 1884..

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lVlLlilr-tlll VI'LSON, JR., OF GREENVILLE, DELAXVARE, ASSIGXOR OF ONE- HALF TO CHARLES GREEN, OF SAME PLACE.

METHOD OF MAKING SHEET-METAL CANS.

EPECIFCATON 'forming part o Letters Patent No. 300,548, dated June 1'7, 1884.

Application iiled November 1T, 1383. (No model.)

.To al?, whom, iii/tty; concern,.-

leit known that l, WILLIAM lViLsoN, J r., a citizen of the United States, residing at Greenville, county of New Castle, and State ot' Delaware, have invented a Method of Waking Sheet-Metal Cans, ot' which the following is a specification.

My invention relates, in general, toaclass of metallic vessels or sheet-metal cans,77 so called, employed for the hermetical inclosing olpaints, preserved edibles, caustics, and other substances; and it relates, speccally, to that subdivision of the above class which comprehend-s what are known as Wire-rip 7" cans.

Generally' stated, the object of the invention I l of material be made in the following manner:

is the economical production of a strong and durable can. More specifically, the object is the manufacture of a wire-rip slip-cover can, the ilanged rim of the cover of which is double-scained with the top of the cover proper,

and the bottom of which is formed from aI blank in the manufacture of the flanged rim of the cover, the said can being of my invention, and forming the subject-matter of an application for patent, No. 120,124, tiled February S, 18S-l.

ln the accompanying drawings, which form a part of this specification, Figure l is a View in central vertical sectional elevation, and Fig. 2 a viewin side elevation, of a can produced by xny-niethod.' Fig. 3 is a plan View of the blank from which are eventually struck both the llanged rim of the cover and the bottom of the can produced by my method. Fig. It represents in central vertical sectional elevation the saucer-shaped forni (designated for convenience as F) into which the blank col' Fig. 3 is first struck, Fig. 5 representing in similar View the flanged riiu produced by striking from the saucer-shaped form of Fig. at its bottom, which becomes the blank represented in plan in Fig. (i, and is eventually employed as the bottom ot' the can proper. Fig. '7 represents in vertical central sectional elevation the top of the cover. Figs. S, 9, and 10 are central vertical sectional elevational details, on an enlarged scale, of a portion of the upper part of the can produced by my method, illustrative at different stages of the union of the top of the cover with the flanged rim thereof by means of a double seam.

Similar letters ol' refe-renee indicate corre-y sponding parts in all the views.

Heretofore slip-covers (not being drawn covers or those struck up from a single piece of metal) of a variety known as i rim-covers,77 and formed with a rim separate from the top, have not been made by double-seeming the rim with the top, (a desirable construction, because strong,`) by reason of the expense incident to the amount of materia l necessarily Wasted.

I have discovered that a double-seamed rinicover can of the character invented by ine, and forming the subject-matter of the application for patent referred to, can Without Waste I first take a circular blank, a, Fig. 3, of tinned iron or other desired sheet metal, of predetermined diameter, and by a stamp or suitable press forni it into the saucer-shaped form F. (Representedin Fig. Li.) lthen conveniently, bymeans of a die or plunger Whose exterior diameter is suicient to exactly ll the interior of the saucer-shaped form, stamp the bottoni out from the same, to form the blank Z). (Represented in Fig. (i.) This blank b constitutes the bottom of the completed can, as shown in Fig. l, it being dropped Within the side body, C, of the can, and resting upon a circumferential inturned ledge, c, formed on the lower edge oi' said side body.

The llanged rim represented in Fig. 5, which remains after the bottoni has been punched from the saucer-shaped forni of Fig. at, constitutes the rim of my slip-cover, the vertical circular band d constituting the rini proper of the cover, and the horizontal flange d constituting the flange proper, or member ofthe rim which is double-seamed with the top c of the cover represented in Fig. 7. Before, however, dou ble-seaniing the 'llanged rim with the top of the cover, and either before or after securing the bottoin'iu place Within the side body, the ilanged rim in precisely the form represented in Fig. 5 is secured about the chine h of the can-body in the manner represented :in Fig. l of the drawings-that is to say, by soldering a rip ping-Wire, f, to both the lower edge oi" the flanged rim and to a beveled shoulder, g, formed on the side body ofthe can conveuientlyby eountersinking the chine IOO or upper circumferential portion of' the side body.

The application of the solder may be made, as is most convenient, either by hand or machine, and the resulting product is a can-body having a flanged rim secured about its chine by being superimposed upon and soldered to a ripping-wire, itself soldered to the exterior of the can-body. The sealing of the parts is of course hermetical.

It is obvious that traction exerted upon the eyef, Fig.`2,' of the ripping-Wire Will cause the tearing of the Wire from both thecanbody and the flanged rim, so as to set free the latter. This tearing of the Wire is of course only resorted to when it is desired to open the sealed can. rIhe side body, with the bottom sealed in place, and with the ilanged rim herinetically sealed to it through the medium of the ripping-Wire, is then covered by the top e of the cover, which is formed with an over hanging circumferential bead, c', Figs. 7 and S, Which seats itselfl upon the flange d of the flanged rim d, and tight closure is then effected and the ilanged slip-cover as an entirety oompleted by doubleseaming the overhanging bead of the top with the horizontally-projecting flange of the rim.

The steps of theforegoing process of doubleseaming are represented in Figs. 8, 9, and 10, of which Fig. 10 shows the completed doubleseam joint, which is designated by the letter s, and shown also in Fig. 2.

I is a strip of packing material-such as stiff paperinterposed between the exterior of the can-body at or near .its chine and the,

interior of the flanged rim, and which is designed to prevent the solder from connecting the body and rim together above the Wire.

Such being a description of apreferred inanner of carrying out my method of making a can, it is obvious that there results asubstantial double-seemed slip-cover wire rip can which has been made with'the least possible waste of material, which is both strong and easily opened, and which affords the amplest opportunity for completely filling the can proper, it being Well known that many cans in which the top is soldered direct to the chine ofthe vside body can be but imperfectly iilled,

because of the danger of the solder coming in contact With the contents, should they be fully level with the chine. The double-seaming does not of course necessitate the employnient of solder, but is effected by means of seaming-rolls or kindred contrivances in the usual manner.

I have represented, as a convenient construction, a countersunk chine terminating be possible to double-seam the top and the ilanged rim before soldering the latter in place upon the side body, but this'I do not consider as good aplan as that Which I have hereinbefore described, although I regard it as an equivalent'resort.

It will now be understood that, with the exception of the blank a of Fig. 3, and of a yblank such as that struck to the form represented inFig. 7, I require no other metal save that of the side body to completely manufacture the can, and that therefore there is by my methodan appreciable saving of material over and above that which results from any other mode of manufacture of a can of similar construction.

I have illustrated and described my invention as applied to a cylindriform can. It is ob- :vious that it is applicable also, by a suitable modification in the form of the. blank a and in that of the side body, to cans of quadrangular or polygonal contour.

It is also obvious that after my can has been opened the slip-cover, which remains, can be used to recover the Acan when but a part of the contents is removed.

Having thus described myinvention, I claim and desire to secure by Letters Patent-` The method of manufacturing a sheet-metal can, which consists, iirst, in forming a side body proper, then in striking from a blank of predetermined contour and proportions a saucer-shaped form, then in striking the bottoni from said saucer-shaped form to. form the bottom of the side body, then in connecting the ilangcd rim remaining after striking the bottom from the saucer-shaped form With the side body by means of a ripping-wire and solder, and then in double-seaming a top with IOO the ilanged rim, allv substantially as hereinbefore set forth.

In testimony whereof I have hereunto signed my name this 12th day of November, A. D. 1883. i

WM. WILSON, `JR.

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