US2333822A - Closure device for containers - Google Patents

Description

NOV. 9, 1943. w. SAMPLE ETAL 2,333,822

CLOSURE DEVICE FOR CONTAINERS Filed June 28, 1938 T :1. 1:1 En Z3 f 2 5 R INVENTORS. FLEEK -W SAMPLE.

BY EARLMAMESEILIRY ATTORNEY Patented Nov. 9, 1943 57 -151:

a v emscns EEVWE'FOEFQQNCEAWEKS Fieektwiljsa plegmmst nius ivuvana mnin- A megbm y ghicagg lll assigno'rs to Americansn-am 'N: Y; a

Ihisinventiomrelatestw ccntamenclosure cofl structions and -=particular1y =te=tl iose the closure reeeivingpaer; or-flar ige is--fbrmed 'iht gr'ally'.witlwthe containen walli v 1 Anobject ofi the ilivnfion fis fio'--IH=QVide6pen--- ings in heavy gauge' centaiiners witl'i emcierit closures-having a minimum numiaen of name Another- 0135 ectof this invention is-- to provide am efii'cientand -practical@closure receiving part gauge containersa. l t v Another: object -isto previde =aw resonan for forming thei' -samei Aiurther .o'bject 'of tlie invention Is to fam such; closuretmreceivingx past o'rflange with ef- Heretofore it has .beenmthought necessarvialim v providing, the openings: in large metaihcontainersc or drums with efficient: closing; devices; tOLfiIE-a ploy, separate flanges or: bushings for; receiving; closureplugs. or,bungs; These flangesk; arezisea cured J in: place; about the: openingssby pressingi s or welding-the ,adiominggmetalsaintor.adeak proofi: joint Such systems not only-ireqniresthatr sepasarate partsv-be provided; but alsmentail'hconsidenable expense in labor, and: machinermforwthe;

forming of such parts as .welhas in theisecmin 40:

of the same: toggthe' containerlwalls si Effortsatos. eliminate :this expense have heretoforel-been une availing, it remaining for; the instanttimrentmm to provide the solution'to.thislproblema With improvement in, meta-Isafnomlwhichztheaj type of heavy gauge containers .inaqnestion; are made, applicants have diSGOVIGdizHkDTDGBdflIZB ,byaa which efficient closures. can beeformedin .The plug or bung receiving-means. iszpressed'mightzont L of the stock-of thecontainerrmal-l andiissiormedc 5W to accommodate a plug gasket-has well-iasettheg skirt-pf} ai seal cap; Thus, not only is the plug properly'received;nbutiiefiicient seating for the plug gasket is provided, while additionally, the

reception of a leak-proof and tamperproof seal container wallwn isnaancnimece;193s; semifinal-sane v 1 clema is. i (01. 220 291 tl'ie attrmnteecfi What-is new c onsidered as good practice" in -the ifidustl y Moreover; the resultantvcldsure'has a1=1=tlie= strength necessary for 5 eificientsafe opem tion throughontthe life of the COfltaineIflr 3 e Fen elk-fuller "understanding er: the nature. and objects of the inventi on rfe-l eneeshould be the'.- following detailed dES ption i1 1- connection witn tne accompanymg deeming which? Fi s a rplanview ofah se'dtiefi of a container wall i aiving an opening therein showingsuch opening; defli ie'd b at neckor name-mthe first fifiormation of tnesamew 1 isFa'x section on line 2-.2;;ofFi'g. Fig is a View similan to -Fig. 2' showing the neck or- 'nan' e as upset? accordance withthe next step 'n tI-i'e process-"oi ior-mingvthe same;

Fig: 4- is' a viewsiinilap to- Fig. 3 showing the neck- 01 fiang'e atten the same has been internally thmea'dedr r H Fig. 5 is a View similar to Fig.-f4 showi-ng a, closnreplug seeitect in position-the orkfiar-ige.

Figs 6--i s'a1a view'. similarto 5 showing the mannen i11- whicntne c1bs11re -is seald -by means-ofa seaI-oapa l ,v

Throughout-the several views on the drawing a portion -of the wall at a containe nfis generally indicated by the reference character it). This may be a; portion from the head =0r body sheetof a m e'tal l ic container of relatively heavy gaugebut theinvention-mnemobe considered as lime ma ta-the field ofi metallic drums, since it also finds aipplication the :electricalfield; for in stance; in s'iIcha constructionsas transformer shells; would he most serviceable: in woodcu containers where a plate 1 similar tea that shown at I 9 v could 1 readily: be *se'cnred to" 01 in the woed adjacent an -opening-therei n:

combi-natiom a;

a neckl 2 sui roumiing opening l E. This neck, as. shown) extends upwardly substantiallya 90 angle to the surfaceof wallmfl andhas a thickness the same astnat at said wall: 1 The next operatio'n to bepenforrned" he neck-the. res'dlts of which afieshown ime 3,-;is'-"a co'm binati'omof.1flaringandz ufpsettmg; Ifilthe'vstoclc: isao'ii: suflicientlylargood quality; thezio'rvce of:.;the upsetting axially of the neck will produce there- In faict the closurecf this invention outwardly from its mouth to a point approximate l ly midway of the same. Thus, a surface I4 is formed inside the neck around themouth there:

of for properly engaging and seating a plug gasket, while on the outside of the neck an-in r wardly inclined surface I5 results which is e ifec as will appear more fully hereinafter;

tive for the proper receptionofa seal'cap skirtf Following the formation of the neck, as shown I in Fig. 3, the interior of the same is threaded as shown at I6 in Fig. 4. In this-regard, it is to be" noted that the threading commences at the bot:

tom of gasket seat It and thus is largely formed in the portion of neck-I3 which is substantially. devoid of any flare.-

In the event that the neck be thickenedwhichis contemplated where the material acted upon provides opportunity for the same-the wallback of the threads willbe little,

if any, thinner than the originalstock IE1. j Even though no thickening takesplace, however, sufficient stock will remain ingback of the; threads to provide an entirely safe and satisfactory seat:

for the closure elementsemployed.

In Fig. 5 is shown the manner in whichthe screw plug I1 is employed for-closing thej'openslightly larger than thediameter of the, threaded portion I9, is provided on the plug. Beneath such head, between the same and the screwthrea'ds, is formed an undercut recess 2ii-for receiving a gasket 2I. These; parts are so relatedwith re-.

spect to gasketseat Mthat the maximum ef-,-

fectiveness of gasket 2 I is obtained, all asset forth inU. S. Patent'No. 1,982,145 toJohn -W. Shara.-

point is thought Hence, further discussion on this to be unnecessary.- I .7 Y In Fig. 6-, the closure ofFig. 5 is shown-as; en-. compassed by a seal cap, generally shownat. 22. This seal cap has a crown portion 23 for covering the head of plug II, a brim portion Maud a, skirt portion 25. A gasket 26 received inthe chamber defined by brim 24, the upper surface-21 of neck I3 and the sidewall. 28 of plug head I 8,. iscarried by seal cap 22 and, on the crimping in place of seal cap 22, operates to seal the linejbetween plug I I and neck It against any,p0ssibility of;

leakage. 'I'hisgasket may be adhesively secured to the inside of brim24 or be held in place in. any otherv desired manner. Compression and effective seating of the gasket'26 is accomplished by the drawing action, transmitted by skirt as the latter is axially crimped and thereby forced to slide downward-on incline. I5. This action is generally similar to that described inU; S. Patent No. 1,887,435 to F. W. Sample,,b ut diiiersfrom the same to the extent indicated bythejdiiference in.

structures involved. In this instance the use of aslightly larger. gasket and theincline, of brim;

- 24 render the force necessaryfor providing an,

effective seal somewhat less; than that required in employing theconstruction Patent No.'1,887,435. f

While gasketZEi gives insurance against-any possibility of leakage evenshould gasketg ll. be

in; any way rendered :ineifectivathe. sealalso provides. insurance against tampering. '1 #This .in-.'

surance resides: in the: "fact that the bottom edge disclosed in U. S-.

I the container walLk': U a

" k? f FLECKQWsAL/LPLEA 28 of skirt 25 approaches so close to the'upper' surface of wall III that no room exists for the insertion of a tool by means of which one would be enabled to remove cap 22 without mutilating it. Should one wish, however, to'remove seal 22 in an authorized manner thereby destroying the same, such can readily be accomplished due to a the presence of score linesof the type indicated ilrU. S. Patent NO. 1,982,145.

Although the neck has merely been illustrated as flared outwardly at its mouth to provide gasket lsurface I4 and an inclined cap skirt receiving surface I5, the possibility of other formations is readily apparent. For instance, the mouth of neck I2%could"bef upset to form a rounded thick-1 -ene'd portion in=the nature of a bead, or such a, 'bead'could be 'formed in alternate manner by 'i' exerting an outwardbending and rounding action on the mouth of collar I2. Lastly a right-angled outwardflaremight be provided at the mouth of the neck .to accommodate a plug with afiatgasket and to -retain a. seal cap whose;skirt-would-be; crimped-in under the outwardlyflared portionrr-t;

It is thought that the foregoing; ,descriptionadequately describes the construction as well as themethod of formation, of the closure of the if I I invention. However, itis to :be understood that;

such descriptionis merely illustrative ,and iSillOt tobe interpreted in any way inalimiting Having described our invention, what we..=claim as new and desire to secure by Letters Patent iszap. 1

1. In structure of the characterfldescribed;1a

container wall having an opening therein, an' up-j. I

standing necksurrounding said, o'peningcformed integrally with the stock of the 1 container wall andisaid neck being thickened; by compression; throughout itslength to allow for the formation of threads therein withoutsubstantiallyireducing the resultant thickness of the neck below. the thickness ofzthe container wall stock-and flared outwardly fora substantial distance. from its mouthto provide. .on the outside thereof an in-" wardly inclined surface for. reception and reten tion of a seal cap skirt.- 1 :1;- v

2. In structure of the. characterdescribed, a-

container wall having anopening therein, anupstanding. neck surrounding said opening forme'd integrallylwith the stock of the container wall and said neck being thickened by compressionf throughout. its lengthto allow for the formation of threads therein, without substantially reducing the resultant thickness ofthe neck below the thicknessof the container-"wall stockgandfiared I outwardly. for a substantial distance from its.

mouth to provide: on the outside thereof an -in'--"" wardly inclined surfaceand-on theinside thereof-f an outwardly inclined gasket seating -surface'.-

3.111 structure or the characterrdescribed, a

container 'wall having an opening therein,-anu'p-' standing neck surrounding said opening formed integrally with the stock of the container wall,

said neck being thickened by compression throughout f-its length and flared outwardly for a substantial distance from its out :a substantial portion of its lengthf-and the stockofisaid neck, back-of said threads; being substantially as thickas the; original thickness of e LM mmouth to provide on the outside thereof an "inwardly, inclined surface for reception and retention of a sealcap skirt and said neckbeing threaded internally through!

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