US2209448A - Container - Google Patents

Description

July 3 0, 1940. c. K. DUNLAP CONTAINER Filed May s, 1938 Cfiarles 1K. JzwzZa v,

Mew-q Patented July 30, 1940 v v 2,209,448"

PATENT oFFrcs "Sonoco'Products Company, Hartsville, S. 0., a" corporation of South Carolina Application May a, 1938, Serial No.- 205,823 4 Claims. (01. 229-55) This invention relates to, containers ,for the tainer. Where oils are to be packaged and dispackag'ing, transportation and dispensing of pensedthis coating composition may comprise commodities and particularly to containers fabglue and I select glue in order to make use of ricated of paper and primarily intended for disthis coating as the means for attaching the I pensing of liquids such as lubricating oils. flanges of the bottom discs to the inner wall 5 It has heretofore been suggested that paper of the container and also as the means for atcontainers of self-supporting type and conical in tachment of the bulkhead or partition to such form might advantageouslybe employed for the inner wall, thus simplifying the process of manupackaging and dispensingof lubricatingv oils. A facture and making it possible to produce a paper container, after being emptied, can of container of the type above described at lowest course be readily disposed of .by burning and possible cost. where the paper container-is conical in form it Two such containers are illustrated in the accomprises a convenient pouringfunnel, in itself, companying drawing by way of. example. It after its nose or apex has been severed. ,Howwill be appreciated-by those skilledin the art I ever, this type of containerhas never been comthat certain features of the invention may be 16 mercially used,'one difficulty being to so fabriincorporated in containers which are not truly cate it that leaks will not develop during transconical, as for instance in cylindrical paper conportation and handling. A primary purpose. of tainers, although primarily the invention is dithe present invention is to providea paper conrected to the production of an inexpensive and tainer of the conical type which maybe ecothoroughly satisfactory paper container of the 20 nomically fabricated, isself-supporting .at all conical type. times, and which will'withstand the shock and In the drawing: I abrasion incident to rough handling without de- Figure 1 is a side elevation of a container, parveloping leaks. One feature or, the improved tially broken away, to disclose the bulkhead and 1 container is the provision of a transverse partibottom construction; and I, v 5 tion or bulkhead within the container and closely Figure 2 is a similar view, partially broken adjacent the nose or apex thereof, this partition away to show a slightly difierent type of bottom dividing the container into two non-communicatconstruction. ing compartments, a major compartment in. The conical body portion of the container is which the liquid commodity is placed, and a indicated at l0, the transverse bulkhead or par- 0 minor compartmentadjacent the apex which is tition at H, the bottom or end closure being genentirely empty. It is the apex of the container erally indicated at l2. The body portion I0 is which is most likely to fail or develop leaks when fabricated by winding upon v a conical mandrel the container is roughly handled and, by the proa generally semi-circular paper blank which has vision of the-bulkhead or partition referred to, preferably previously been coated with a suitable the liquid contents of the major compartment adhesive, the resulting cone being two or more lsprevented from escaping even though the apex plies in thickness and the several plies being 1 may have become severely damaged; secured together by the adhesive appliedprior It is also a matter of some practical difiiculty to the winding operation. The cone is trimmed U) provide a closure for the larger end or bottom at its large end in the customary manner and of such a container which adequately retains its after it has dried its small end or apex is rounded liquid contents at all times and it is a further and closed, for instance by pressing the same object of the invention to provide an improved against a rapidly rotating die. If this closing bottom construction for a tubular container prioperation is properly efiected the annular edge ma'rily intended for liquids. This bottom conof the body at the small end will be laterally and ltruction comprises essentially two discs, each inwardly deflected and caused to merge into a provided with a peripheral flange, the discs being continuous structure, exteriorly polished and positioned in face to face relationship with the ordinarily strong and well able to withstand subfianges extending in opposite directions axially stantial shock without damage. After the conof the container, these flanges being attached to tainer is charged with the liquid, however, it is the conical inner surface of the container by a comparatively heavy and, if dropped for any suitable adhesive. A paper container for liquids distance in such manner that it falls with its must be necessarily interiorly coated with some apex end downwardly so as to strike a solid coating composition which prevents penetration object, there is a strong likelihood that its apex of the liquid into the fibrous walls of the 0011- will be opened to permit the escape of the conp,

tained liquid. In order, therefore, that no such escape of liquid may occur even though the nose or apex of the container be severely damaged, the bulkhead II is inserted. This bulkhead preferably comprises a paper disc having a continuous peripheral frusto-conical flange, the outer surface of which is adapted to seat against the inner surface of the container body "I. It is spaced rather closely to the apex end of the container and divides the container into two compartments, a minor compartment which lies above the bulkhead and a major compartment which lies below. The normal level of the liquid in the container may be as indicated by the line l3.

The bottom closure comprises two paper discs I4 and I5, disposed in close parallel relationship,

- and each having a continuous peripheral frustoconical flange, the outer surface of which is adapted to closely engage the conical inner surface of the body "I, these flanges extending in opposite directions axially of thecontainer. As will be observed, the margin of container body ill, at its base or large end, is inwardly and upwardly deflected so as to envelop and retain the peripheral flange of the lower bottom disc ll. The discs are provided with registering apertures H and I5 through which the liquid to be packaged may be introduced when the container, as thus far assembled, is inverted. After'charging, this charging opening may be closed by a circular disc such as indicated at It in Figure 1 or a paper plug such as indicated at 20 in Figure 2.

All surfaces of the container which are or may possibly be exposed to its liquid contents are, prior to charging, coated with a coating substance or material, resistant to the action of the contained liquid, to prevent penetration of the liquid into the fibrous walls of the paper members which, together, comprise the container. Where oils are used the coating substance may conveniently be glue, which will resist the action of oils, and glue is used preferably inasmuch as it likewise comprises an adhesive by means of which the bulkhead II and the bottom discs ll 5 and I 5 may be attached to the inner wall suris applied to the entire inner surface of this cone or body. The bulkhead or partition member II is dipped in the leak-proofing substance and inserted in the cone until positioned as shown in Figure l. The bottom members l4 and I 5 are v likewise dipped in the coating material just prior to insertion within the large end of the cone.

Hence all surfaces of the container are coated and, inasmuch as the partition II and bottom members l4 and I5 are applied to the body III while the coating composition thereon is still in liquid conditiomthe coating composition itself likewise comprises a bonding material for securing these members in position. The closure disc I6 is likewise dipped in the coating material prior to' application and, in the event that a closure cap such as indicated at 20 in- Figure 2 is applied, this is also dipped prior to application.

The bulkhead member Il may be inserted through the -fllling opening after the bottom members l4 and I5 have been applied, if desired. Preferably the lower margin-of the-body ID, or the margin of this conical body immediately adjacent its large end, is inturned after the coating material has completely dried After charging and closing of the container it may be coated exteriorly, on all surfaces, with a coating composition, to prevent the penetration of moisture into the exposed surfaces of the container,

which would tend to weaken the wall of the con-- tainer. Having thus described the invention, what is claimed as new. and desired to be secured by Letwhich serves to prevent passage of liquid to said apex.

2. A container for liquids comprising a hollow multi-ply conical paper body the apex of which has been rounded over and closed by pressure,

- and a. partition within the said body closely adjacent the apex thereof to retain the liquid contents in the event that the apex closure is damaged.

3. The combination set forth in claim 2 in which the partition member comprises a paper disc with a frusto-conical flange, the outer surface of said flange bearing closely against the inner surface of said body and being attached thereto by an adhesive.

4. The method of making paper containers which comprises separately forming a conical body portion and a plurality of spaced circular partitions or bulkheads, each of a diameter equal to that of the circular section of the cone of the body portion at which they are to be disposed, coating the interior surface of the body with a leak-proofing substance of adhesive nature,.and successively inserting the bulkheads up to their limit of movement with the cone and into contact with the adhesive covered interior surface whereby they are secured thereto by means of said coating substance. I

' CHARLES K. DUNLAP.

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