US2207003A - Container - Google Patents

Description

y 9, 1940. c. k. DUNLAP I 2,207,003 CONTAINER Filed June 14, 1938 2 Sheets-Sheet 1 Curie: KTJzwzZa p M FMJ WWW July 9, 1940 c. K. DUNLAP 2,207,003

CONTAINER Filed June 14, 1938 2 Sheets-Sheet 2 'IIIHHHIIIIIII Patented July 9, 1940 UNITED STATES comma Charles K. Dunlap, Hartsville, S. C., assignor to Sonoco Products Company,

corporation of South Application June 14,

3 Claims.

This invention relates to containers and particularly to containers of all-paper construction and primarily intended for use in the dispensing.

of liquids. I 6 A paper container which is intended for use in the pack g ng'and dispensing of liquids must of necessity be self-supporting, i. e., must maintain its shape at all times despite the unstable nature and outward pressures exerted against its inner 10 surfaces at various points by the container liquid, and despite the shocks and abrasions due to rough handling in transportation or at the point of consumption of'the liquid commodity. Naturally paper containers for such commodities as oil meet with widely varying conditions between the times when they are charged and sealed and the times when they are 0 ned and the contents discharged, some conta' ers travelling short. distances and not being subjected to any appreciable rough handling and other containers being transported longer distances to various points of consumption, on trucks or railroads and are, en-

route, considerably buffeted.

A paper container which is fabricated in such manner that it is well able to withstand all shock incident to handling and transportation without substantial injury must naturally be much more staunchly constructed than one which will not be subsequently subjected, after charging, to

rough handling.- Also a heavily built paper container is more costly to fabricate than one of light construction and hence the total cost of distributing a liquid commodity will be greatly in-v creased if all the containers in which such com- 35.modity is'packaged are constructed to successfully withstand the most severe blows and shocks to which any one of them may conceivably be subjected. 1 v

In accordance 'with the present invention a 40 paper container is provided, which comprises essentially, in addition to the container proper, a

reinforcing envelope which is separately formed and applied and which may or may not be used at the option of the container manufacturer, having in mind the ultimate destination of the container and the nature of transportation and handling shocks to which it will be subjected enroute to suchdestination. Thetwo-part container provided by the invention promotes economy in use of such containers for the dispensing of liquids since, while a container-of maximum strengthand' somewhat increased cost, may be supplied where necessary, the strength and cost of the container maybe reduced where the extra I strength is actually not necessary.

svillc, S. 0., a Carolina 1938,,Scrial No. 213,660 (m. 229-45) The invention pertains particularly to containers of the conical type the'mo'st vulnerable portion of which, when charged, is the main 'member or conical wall or body of the container.

The container proper is frusto-conical, having 6 flat parallel top and bottom closures and the conical body or wall is fabricated of sheet paper,

- rolled on a mandrel; Where it is expected that the container, after being charged, will be subjected to rough usage, a frusto-conical en- 10 velope is slipped over the container body proper and secured in such position, the protective envelope likewise comprisinga sheet of paper rolled into conical form on a mandrel. This envelope; when used, is secured in position by means of an adhesive and is exteriorly decorated with designs or legends in the same manner that the body of the container proper is normally decorated.

By the use of the novel protecting envelope the may likewise be strengthened and the invention contemplates also the fabrication of a container of conical type in which the top and bottom closures are so applied to the body thereof that the outer wall or protective envelope. engages portions of these closures and more firmly secures them in position.

The invention likewise contemplates certain improvements-in the details of construction of the'top and bottom closures, quite regardless of whether or not the protective envelope is employed. Preferred embodiments of the invention are disclosed in the accompanying drawings by way of example, in which:

Figure 1 is a perspective view of the container 86 proper, without the protective envelope or outer wall, portions being broken away to show the interior construction of the container and, to disclose the means for sealing its ends;

Figure 2. is a perspective view of the container 40 outer wall or protective envelope;

Figure 3 is an axial section through the com pleted container with envelope assembled therewith;

Figure 4 is an axial section through a modified 45 type of container to whichhas been applied a protective envelope;

Figure 5 shows in section the upper end of the same container and the two closure caps, the several parts being spaced apart; and

Figure 6 is an axial section through a. further andvery simple type of container with which the protective envelope may be used if desired.

3 Inx'the fabrication of the container proper,

which is shown in Figure 1, a sheet of paper is top and bottom closures of the conical container 10 wound into conical form upon a conical mandrel, the blank prior to the winding operation being coated with a suitable adhesive so that the several. convolutions of the paper are rigidly secured thereby into a rigid structure. After winding, the tip and base of the conical member are accurately trimmed so that the resulting container body, indicated at I0, is truly frusto-conical, its upper and lower edges lying in parallel planes. Its outer surface may be: decorated with legends and ornamental figures to indicate the nature of its contents, and the manufacturer thereof. Its bottom closure comprises two flanged discs; an inner disc II and outer disc l2, the flange ll' of the inner disc being itself frusto-conical so as to closely engage the inner surface of the frusto-conioal body Ill. The flange I2 of the outer'disc is also frusto-conical, or at least is made so by a rolling operation after assembly of the disc l2 and body It], in order that the inner surface of this flange will closely engage the outer surface of the body I0. Suitable adhesive substances are employed to secure the discs in the positions in which they are shown and all surfaces of the closure discs, as well as the inner surface, and preferably also the outer surface, of the body ID are coated with a substance which will prevent penetrationof the liquid contents of the container, after it is charged, into the fibrous walls of the container. The container is charged after assembly of the bottom closure but prior to closure of the small end, in which event the top closure 'will comprise a disc l3, having a peripheral frusto-conical flange l3 which engages the outer surface of the body III at its upper end. In the event that the container is charged'through its bottom or larger end, the closuremeans for the small end may comprise, in addition to the flanged disc l3, an inner flanged disc II, the

peripheral frusto-conical flange H of which closely engages the conical inner surface of the body Ill at its upper end. Suitable adhesive substances are employed to secure the closure discs l3 and I4 in the positions in which they are shown.

A container formed as just described is sufliciently durable to withstand all shocks and blows due to ordinary handling and transportation. Where the container is to be transported long distances, however, or it is expected that, due to any one of various reasons, it will or may be subjected to rougher handling, a frusto-conical reinforcing envelope may be placed over it. Such an envelope is illustrated in Figure 2 and will be seen to comprise a conical member l5, open at top and bottom. It is also formed by winding an adhesive coated paper sheet upon a conical mandrel and thereafter accurately trimming the ends of the resulting article. Prior to assembly with the container proper its exterior surface may be ,appropriately decorated and its inner surface coated wholly or partially with an adhesive. When assembled the inside surfaces thereof adjacent its upper and lower ends will bear against and closely engage the exterior surfaces of the flanges l2 and I3 of the outer, lower and upper closure discs I2 and i3. After the adhesive has dried the envelope ISis firmly secured in position and not only serves as a protector for the conical wall of the container proper but likewise as an auxiliary means for securing the closure discs l2 and IS in position. .Hence not only is theside wall of the container strengthened but likewise its top and bottom seals. As

has previously been pointed out, the envelope I5 is made use of only when necessary and hence a very substantial saving is realized in the production and wide distribution of a large volume of a liquid commodity such as'oil, -the wall of the container proper l0 being made only just sufliciently thick and durable to withstand minor shocks incident to local transportation and handling.

The protective envelope may be permanently attached to the container proper, if desired, by inturning its edges so as to engage the top and bottom seals of the container. Such a construction is shown in Figure 4, where the envelope 20 has its inturned edges 20 and 20 in engagement with the top and bottom sealing caps 2| and 22 respectively. It will be observed that, in this form of container, both of the sealing caps 2| and 24 may be applied from the outside, so that the container may be charged with liquid introduced through its small end or top opening. It will be perceived thatthe outer sealing cap 2| has a frusto-conical flange which flts against the outer surface of the container body 23- whereas the cup-shaped inner sealing cap 24 has a peripheral flange 24 which is adapted to rest upon the upper edge of the container body 23.

Both caps are retained in position by an adhesive coating substance and by the inturned edge of the outer envelope. It will be observed that the liquid contents of the container cannot come into contact with the edge,of either of the caps 2|, 24 or with the edges of either of bottom.

ing composition and the top and bottom closure 1 discs are preferably coated on all surfaces by dipping, prior to assembly.

In the form of container shown in Figure 6 the top is closed by a single cap 30 and the bottom by a single flanged disc 3|. The flange 3| of disc 3| is cylindrical when the disc is applied to the container body 32, as indicated in dotted lines, but is inwardly deflected by a rolling oper-' ation to its full line or container wall enga g position. A Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent isz' 1. A self-supporting conical paper container comprising a hollow frusto-conical body portion and closures for the ends thereof, each such closure comprising a dischaving a peripheral frusto-conical flange, the inner surfaceof each flange closely engaging the outer surface of said body portion, and a separately formed relatively stifl' frusto-conical paper envelope enveloping the said body portion and closely engaging and securing said flanges.

2. A self-supporting conical paper container at the larger end thereof closely engaging andsecuring the peripheral flange of said closure the flange of one disc closely engaging the inner disc. surface of the body and the flange oi the second 3. A self-supporting conical paper container disc closely engaging the outer surface of the comprising a hollow frusto-conical body portion body, and a relatively stiff, frusto-conical enand closures "ior the ends thereof, each end velope encircling said body and closely engaging 5 closure including two closure discs disposed the flange of said second disc. transversely of the body, both discs at each end having integral peripheral irusto-conical flanges, CHARLES K. DUNLAP.

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