USRE12959E - J ulius brenzinger - Google Patents

Description

J. BRBNZINGER.

IETHOD 0F FORMING COVERS FOB SHEET METAL CANS.

ruck-non run our. 15, 1907.

Raissued May 25, 1909. 12,959."

A TTOHNE Y- INVENZOR UNITED STATES PATENT OFFICE.

I JULIUS BRENZINGER, OF MOUNT VERNON, NEW YORK; ASSIGNOR TO THE M AX AMS MACHINE COMPANY, OF MOUNT VERNON, NEW YORK,

A: CORPORATION onNEwvon a warrior) or FORMING oo'vnns 1 Rv SHEET-Marl n oAN'sl" Original No. 845,761, dated March 5,

To all whom it may concern:

Be it known that I, J ULIUS BRENZINGER, a citizen of the United States, residing at Mount Vernon, in the county of Westchesterand State of New York, have invented cer-. tain new and useful 1m rovements in'Methods of Formin Covers or Sheet-Metal Cans, of which the to lowing is a specification.

This invention relates generally to sheetmetal containers, commonly known as tin cans, wherein the cover or end portion is secured to the body portion by the process known asdouble-seaming which process, as is well known, comprises the steps offlanging the end edge of the can. body, superposing thereon the annular edge of the cover, intercurling or interfoldin together thesecon tiguous layers of meta and compressing the same into a substantially solid bead.

In addition to attaching the cover or end portion to the can body, it is obviously desirable, if not necessary, character to hermetically seal the container.

' To insure hermetic sealing, it has been found that a thin layer of suitable composition,

tween the layers of metal which are subseuently intercurledor interfolded together. n inde endent or detached packing ring might o viously be employed for this purpose, but, inasmuch as the separate parts of such containers are usually provided in large quantities for subsequent packing and seal-' ing, the diiiiculties attendant upon the handling and adjustment of a detached packing ring will be apparent. It is, therefore,'the custom to rovide one or the other of the parts to be mtercurled or interfolded with a suitable composition in the form of a film or lining adhering to such part; Furthermore, with speed and economy in view, the lining or coating of the parts should be done by mas chinery, and, for the same reasons, should be a plied to the cover. In its original state .t is composition is generally in the form of a mobile liquid, and may obviously be applied to the edge of said cover by means of a brush and in many other well-known ways. 1n View of the fact, however, that compositions of the desired character and consistency, in liquid form, do not readily adhere to tin plate,-and when a brush, or'similar means of distributing'the liquidJcoinpoisit-ion over the edges of the ove 1f,.is employed-it often'ha that the joint be of a or so calledthe annular promoting edge 13 is so upon afla ew Specification of Reissued :Letters Patent. Reissued r 1907, Serial No. 303,960. Application Serial No. 397,695.

portions thereof have, in shrink-h1g1 or :otherise, peeled off the metal; This inlnghas also been applied by properlydirecting a jet of the composition against the edge of the rlofor reissue; filed Comb ch15;

found to be unevenly distributed, that tating can-cover, but, as heretofore em-- 4 ployed, this process has been likewise objec tionable for'two principal reasonsL; first,Y be-' cause,'as her'einbefore stated, this liquid composition does not readily'adhereto-tin-plate, poured upon the same .is likely to run or peel off, and, sec'ondythere and,therefore, when being "nothing to retain the liquid; upon the cover, in running 0e, it will drip- Or dram upon the. table, bench, machine or the'like to a degree which is invariably objectionable-,1

and sometimes fatal to satisfactory results." 1

The principal object of this invention: is} to so forni' acan cover'as' to receive and 'retain in proper position" the liquid "composition,

which, upon being applied thereto,"will -upon' drying form a uniform unbroken and evenly distributed film or lining, properly located to form a acking when said cover is applied to and sea ed upon the can-body.

My invention will be more readily understood by reference to the accompanying drawings, forming a part of this specification, in which- Figure 1 is a central, cross-sectional view of an inverted can-cover provided with an annular groove or gutter, the formation of which is the first step of my invention; Fig. 2 is a similar view of the cover in proper osition, the composition having eva crate to leave the packing film or lining. Fig.3 is a bottom plan View of 5 are, respectively, enlarged views of of Figs. 1 and 2.

While I have shown a cover for cans of substantially rectilinear configuration, with rounded corners, it will be apparent that the invention is equally applicable to cylindrical round cans or containers of As is well known,

theends any other desired shape.

.these covers are the subject of independent manufacture, and are provided with an annular depression 11, or otherwiseformed to provide a shoulder 12, within which a correspondingly shaped chuck is inserted to support the edges of the cover against theseamingmechanism. It is also well-kno wn that erposed (hi PIQYidBdMt 6- upper Fig. 2, and Figs. 4 and I by the original epth of the liquid in the gut 2 5 In other words, substantially the en-- so so ally supporting these superposed layers which are -rolled or curled together by the seaming mechanism. This cover is usually cut and formedat a single operation, and the first stepoi the present invention is the simultaneous up-turning of the extreme edge 14 to rovide the endless groove or gutter 15. Into t 's gutter is poured, at the pro 7 er time, the composition referred to, whic in its primary state is an exceedingly thin or moile fluid and of a consistency to flow freely into said tte'r and throughout the extent thereof. his com osition, bein of such thin consistency, will be material y reduced in bulk or volume by eva oration, and, therefore, if I substantially fill this groove ortter 15 with such composition-which,

' eing of a viscous character, will adhere to the portions of the cover with which it comes in contactit will, upo'n dryin or partially drying be reduced to a thin 'fi m-or liningskm which coats each side wall as well asthe bottom of this tter'to an extent'measured ter. V tire width of'that portion of the cot er-edge which is sup upon the edge-flange of tuning will be 'unif'o I 4 I cove rs therefore, when in the position ndieated in Fig. 1, may be in any manner sube "se the bod -port?d ns for the urpose of double rmly'coated. These" jected to the delivery of composition fromv I placed to one side am sufficient time for evaporation is allowed to elapse to provide the thin film or coating 17,. The cover is now in condition to be applied to the can body and the seaming operation effected.

I claim as n1 invention:

L'The met odof forming a cover for sheet metal containers which consists in shaping the blank to provide a circumferential gutter therein, flowing a liquid linin coni osition into said gutter to substantially fill t 0 same, and eva oratin said composition to form a lining-s 'n wit in said gutter.

2. The method of forming a cover for sheet-metal cans, which consists in forming a circumferential tter on said cover, flowing a lining COIIXEIOSItiOIX into the gutter so as to l the same, and evaporating completely said compositionto form a lining-skin within the gutter, substantially as specified.

In testimony of the foregoing, I have herewith set my hand in the presence of two witnesses.

a JULIUS BRENZINGER. Witnesses:

M. AfFRIssE, R. C. WEISHAMPEL.

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