US2253091A - Paper container - Google Patents

Description

Aug. 19, 1941. R E, PLUM 2,253,091

PAPER CONTAINER Filed Dec. 13, 1938 Il) 11111/11111/lill/l//l/ll//A Patented Aug. 19, 1941 ICE j PAPER CONTAINER Russell E. Plum, Phillipsburg, N., J., assignor to I The Canister Company, Phillipsburg, N. J., a

corporation of New Jersey npplieationV December 13, 193s, serial Nm 245,348'

2 Claims.

Thisinvention relates to containers and more especially to so-called paper containers having rigid securing closures at the ends.

A feature of the invention is the provision of an hermetically sealed paper container having metal end closures, one of the closures having'a cylindrical overhanging metal rim, which has a fastening seal at the bottom thereof adaptedto be impressed in the outer wall of the paper container, the cylindrical metal rim including meansA Y which is soldered tothe top of the closure and.

the extension is separated from the key by a small connecting link which is easily broken when the key is lifted from the wall of the closure. In a preferred embodiment of the invention the closure is the usual two-flange closure applied to a-cylindrical paper container and having two parallel walls, one inside, one outside, and connected at the top by a transversely disposed wall which lies on top of the paper'container itself and firmly engages the rim of the container to seal it. One of the end closures may be permanently fixed to the paper' container in manufacture and the other closure left unsealed or unfastened thereto so that the container may be filled with any desired contents at another place, and the edge of the unsealed closure may be a projecting flange that is easily turned and impressed in theouter wall of the container to form an hermetical seal for the contents of the can.

A double` 11a-nge at the bottom and a double flange at the top when the container is finally sealed may all terminate in a' geometrical cylinder parallel with that ofthe container so that when they are packed together for shipment the metal flanges on adjacent containers may engage each other and therefore prevent any warping j`or mutilation of the paper container itself,

band is torn out in' severing the top of the closure from the sealing flange any small burs on the lower edge of the remaining cover are inset under the overhanging top flange so that when the finger and thumb grip the top flange to remove the closure, it is impossible for these burs to contact the skin. In manufacturing the closure the vertical walls are drawn to leave the metal thinner than the metal of therest of the closure so that the severance band is formed in a z'one of the material which is thinner than the material of the rest of the closure thereby facilitating the tearing of the band of severance, thereby providing a band more easily torn away than is possible in the body of a ting can.

In forming the V-shaped scoring the inside chuck is gauged with reference to the scoring edge of the rolls so that itis maintained at any desired predetermined distance. InA one form of tin plateused in manufacture, the thickness of the material may be .014 inch and in drawing the rim wall this thickness may be reduced approximately one-third.

v A tab is provided at the end of the scoring band in the following manner: A vertica-l slot co-extensive with the band is formed and the end of the tab is inserted under the opposite end of' the band of severance, before final rolling. 'Ihe inserted end of the tab may be first dipped in solder before inserting it and the solder on cooling adheres to the inside edge of the band. The tab may also be soldered on the outside of the band and in lieu of the vertical slot a vertical line of scoringis placed adjacent the solder to provide a tighter hermetical seal for the container if desired. Or after the tab is inserted the vertical slot may be completely sealed with solder to give a tight seal. The contiguous walls of the rim of the closure may beso formed that the tab is held against the inside. of theband without solder so that when the tab is turned on the key in opening the can it adheres to the end of the band and rolls the band up together with the tab. The key is held in the vertical position if this feature is desired. Between the upper,

flange and the sealing flange the wall of the rim is pressed on the outer surface of the paper ecn--y tainer vand a severance band may be formed by scoring parallel V-shaped grooves, one adjacent to roll the tab and the band of severance until .the latterv has been entirely severed from the closure. In normal operation of manufacture if care is used in scoring the edges of the band of severance the tin plate is not mutilated or broken through but completely covers all of the walls of the V-shaped grooves, but in any case if an extra precaution against rusting 'or corrosion is desired, the grooves may be dipped in a material adapted to prevent corrosion.

Other materials may be used besides metal in l forming the closure but the flange seal at the bottom of the closure )hust be made of metal' in the upper flange and the other adjacent the,

lower flange.

up to the top flange so that when the ribbon crV The top line of scoring lies clase Varder to furnish a strong sealing grip on the'wall of the paper container.

'I'he term paper conl tainer is applied to any tubular container which may be cylindrical, ellipticaLor any irregular shape desired, in cross-section. It may be vformed of convolutions, it vmay be laminated,

spirally wound, ofy single or multiple ply, and

fibre', Cellophane, or any cellulose-acetate mateedible and industrial oils, and sol forth. 1f it is f desired to produce an unusually tight hermetical seal the edges of the container and the parts under the closure or elsewhere may be doped with any material known in the art of vmanufacture.

It is clear that smooth, protruding finger and thumb gripping circumferential flange and forms a complete unit so that it may be taken oi and put back on to provide a dust-proof cover until the contents of the container are completely used. I

Within the band of severance the usual supplemental oblique lines of scoring may be used to prevent the tearing of the band when it is rolled en the key. The heavier edges of the flanges adjacent the lines of scoring" may also prevent the tearing of the material outside the band adjacent the lines of scoring. It is evident that when the can is sealed, after lling the container the cover after removal has a I Figure 5 is a section von the line 5-5 of Figure 4, looking down. Y

Figure 6 is a section taken onthe line 6-6 of Figure 'I looking in the direction of the arrows.

Figure 7 is a side view of the top of the container showing the location of the tab.

Figure 8 is a section taken on the line 8-8 of Figure 7, looking down.

Figure 9 is a view similar to Figure 7 but showing a modication in which the tab is soldered on the outside.

Figure 10 is a view taken on the line IU-IIJ of Figure 9, looking down.

l 'I'he container illustrated in the drawing comprises a cylindrical body member I0 formed of `paper which has a metal two-flange top metal closure IIhaving a channel I2 and a metal seal closure 9 Vhaving an outside sealing flange I3.

An upstanding flat top is Aprovided for decora-` tive purposes. Referring to 4Figure 2, as delivered by the can manufacturer, the bottom closure 9 is left off and shipped separately and is sealed on the bottom of the body member I0 with contents, the danger of warping, or bending the can, which would arise from weakening the side walls of the can itself by scoring, is entirely eliminated because the scoring in the present invention is done on the rim wall of the closure `where there is no appreciable pressure.

It is now clear that I am the first inventor to produce a paper bodied can,` which is tamperproof, lighter in weight,v having a peripheral line of severance, having a line of severance which leaves a cover that may be used to keep out dust from the container and which is easily removed and replaced until the contents of the container are used up, having a means of severance that is key-operated with fai; less resistance and with less eort than is possible in any safe severing means heretofore known in the art, having the key mounted in a countersink in` the closure and soldered, spot-welded, or otherwise attached thereto so that it is easily removed, and all parts of `the severing means in` such positions that they offer no obstacles or engaging protuberanoes in the normal handling of' the can, having a structure that is strong and durable in handling and shipping and that is easily produced by simple manufacturing methods, and that is of low cost material throughout.

It will be understood that the proportions and -the dimensions, or the material may be varied to produce different size containers using any`modia fication within the knowledge of the mechanic skilled inthe art. l

Referring to the drawing which is hereby made a part of this specification,

Figure 1 is a front view looking down on a completed and filled container.

Figure 2 is a similar view showing the container as delivered bythe manufacturer before filling.

Figure 3 is a front view looking down on a can riiO after the severance band has been removed tov provide almanually removable cover.

Figure 4 is a vertical section takeny at the top cf the closure showing only the left side.

at I3 in'Figure 1. A key I5, provided with a cen- E I tral lengthwise slot I6, is adapted to engage the severing band of the container. The key I5 is soldered or spot-welded on the topvface of ,the -closure II at IB-inthe countersink thereof so that it is normally out of the way, but when it is desired to use the key it is lifted up and torn away.

Referring to Figures 4 and 6, the closure II has a flat top which in the secured position is countersunk slightly below the adjacent rim of the body member I0 and at the outer periphery it is bent down at right angles to form a channel I2 and an inner cylindrical vertical wall 20 Iof the same curvature as the inner wall of the body member. I0. A curved outward 'extension 2I from the top of the wall 20 overlies the rim of the body member I0 and is continued outwardly and downwardly and inwardly to form a convex flange or bead 22. Theextension 2|x is swaged into a form so that when the band 26 is removed the remaining cover is easily taken oil' and replaced with the fingers. formed that it provides a lateral grip for the fingers and thumb of the hand. The metal forming the flange 22 is continued downwardly to form a cylindrical band zone 23 which presses on the outer wall of the body member I0. The metal'forming the zone 23 may be drawn so that it is substantially one-third thinner than the fiat top of the closurev II. In theouter surface of the zone 23 two parallel V-shaped lines of sooring 24 and 25 are impressedto define a peripheral band 26. The lV-shaped scores are so formed as to leave any desired predetermined' the zone 23 between the inso that this improved structure permits the safev scoring of the metal to leave a minimum thickness in the zone 23 between the bottom of the lines of scoring and the inner wall thereof, thereby affording a band 28 which may be much more easily severed from the metal of the closure than would 'be possible if this-band l2 6 were formed in the metal of the body itself of a tin can. At the bottom o\the zone 23 the metal is This flange 22 is so.l

continued in an outer flange 21 which is bent inwardly at the bottom and curled under to form a sealing edge 28. It will be noted that the curled edge 28 is deeply impressed in the outer wall of the tubular member l to form a tight hermetical seal between the flange 21 and the tubular body member l0. As is well known in the art to further augment the hermetical sealing a suitable dope may be applied between the body member l0 and the inside engaging parts of the closure |I. If a hermetical seal is not required the flange 21 may be merely a peripheral fastening means to hold the closure ,on the top of the body member I0.

Referring to Figures 6, '1 and 8 a tab 30 may have a projection 3| passing through a vertical slot 32 which divides the band 26 to form two ends adjacent the tab 30. The `projection 3| may be held under the adjacent end of the band 26 by the pressure thereof or before inserting the t projection 3| of the tab 30 through the aperture 32, the projection 3| may be dipped in solder so that after it is inserted and the solder cools it is eecurely held against the end of the band 26 which forms the initial point of severance when The band is torn from the closure. The Aprojeciion 3| of the tab 30 might also be secured on the outside of the ribbon 26 and in lieu of the slot 32 merely a V-groove 36 substituted where a higher degree -of hermetical seal is desired.

terial and in any desired size and form, then preparing the closures and l2 of suitable form, size and material. The formation of the lines of scoring 24 and 25 and the piercing of the vertical slot 32 or the vertical scoring 36, is followed by inserting a tab which has had its inner end 3| dipped in solder, under or outside the band 26. 'I'he final operation is sealing the ilange 28 in the outer wall of the body member IU and rolling the tab 30 into position within the iianges 22, 21.

Having shown and described a preferred modi- -cation of' my invention and realizing that in view of mydisclosure many modiications in structure, material, size and form will readily Voccur to those skilled in the art, I do not limit myself except as in the appended claims.

I claim:

1. A container comprising a'tubular bre body and a' metal closure for one end of said body, said closure comprising a unitary structure composed of a central portion, a smooth cylindrical vertical wall surrounding the central portion and providing a sliding engagement with the inner-wall of the container, a connecting part extending from the top of the vertical wall and overlying the rim of the container body and extending downwardly along the outer surface of said body After prying up the end of the tab 30 which norl mally lies below the outer edges of the anges 22 and 21l it is inserted in the slot I6 and the key |5 is held in the vertical position and turned to the right. The band 26 rolls on the key and is simultaneously severed from the closure along the lines of scoring 24 and 25. The tab may be of any desired size or form. Supplemental inlclined lines of scoring 34 may be'positioned on the band 26 and removed from the lines of scoring 24 and 25 so that if there should be any flaw in the metal of the band 26 which causes the band to tear, the line of tear would be stopped in one of these scores 34. The line of scoring 24 is near the edge of the ange 22 and likewise the line of scoring 25 is near the edge of the ange 21 so that any tearing of the band 26'outside the lines of scoring 24 and 25 is prevented:

Referring toFigures 3, 4 and 6, it will be noted that when the band 26 is torn from the closure any microscopic or minute burs along the line of tear and left on the lower edge of the upper part of zone 23 below the ange 22 are entirely inside and it is impossible for the ngers or thumbs when gripping the flange 22. to lift the severed closure from the top of the body member I l) to engage these burs, if any. It is also clear that after the band '26 is completely removed from the closure there is left a top cover for the container provided with the lingergripping ange 22, which can be removed and replaced to form a dust-proof cover when the' contents of the can are used a part at a time. The flanges 22, 21 and I3 are preferably so designed that they all lie in a geometrical cylinder equidistant from the vertical diameter of the container so that when the containers are packed The method of manufacture involves prever-L in: the tubular body member of any desired maand terminating in an outwardly projecting sealing flange adjacent the lower end of said cylindrical wall, the overlying portion forming an outwardly projecting manipulating flange, a, tear -strip joining said anges, and an annular inwardly turned bead forming part of the sealing flange and impressed in the outer wall of the container body, whereby upon removal of the tear strip the seal is broken between the cover and the container body.

2. A container comprising a tubular fibre body and a metal closure for one end of said body, said closure comprising a unitary structure composed of a ilat central portion which in the secured position is countersunk slightly below ythe adjacent rim of the container body and at the outer periphery is bent down at right angles to form a channel having an inner smooth vertical wall of the same curvature and in face-to-face contact with the inner wall of said body, a connecting part extending from the top of the vertical wall and overlying the rim of the container body and extending downwardly along the outer Ysurface of said -body and terminating in an outwardly projecting sealing ange adjacent the lower end of said connecting part, an annular inwardly turned bead forming part of the sealing ilange and impressed in the outer wall of the container body, a laterally extending peripheral flange formed adjacent the top of the overlying rim portion of said connecting part and constituting manipulating means for the cover when severed from the container body, the lateral extension of said flange being sufficient to pre-

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