US2209449A - Container - Google Patents

Description

y 1940- c. K. DUNLAP 2.209,449

CONTAINER Filed- May 3, 1938 2 Sheets-Sheet 1 C.K.DUNLAP July so, 1940.

CONTAINER Filed May 5. 1938 2 Sheets-Sheet 2 3mm GZaQ rZeGEIwnZQ v, 9%, 69 M; 9%;

Patented July 30, 1940 UNITED STATES PATENT OFFICE CONTAINER.

Application May 3, 1938, Serial No. 205,825

3 Claims.

This invention relates to containers of the type designed and intended for use in the packaging and dispensing of liquids, such for instance as lubricating oils.

Primarily the invention is concerned with containers fabricated entirely of paper and which,.

* after having been emptied, can readily be disposed of by burning, having no metallic parts. A principal objective of the invention is the provision of an all-paper container 'of low cost, which is self-supporting, sufficiently rugged to withstand all shocks incident to transportation and handling, and which is so treated with a -moisture repelling coating ,that its oil or other liquid contents cannot penetrate its fibrous walls to weaken the same and possibly result in leakage. I have discovered that a liquid will rapidly penetrate into and saturate a paper sheet when it is brought into contact with an edge of the sheet, the liquid travelling by capillary action rapidly in the plane in which the fibers are deposited during the formation of the sheet. Penetration of 1 liquid transversely into and through a paper sheet when applied to aside surface of the sheet proceeds at a much slower rate. Hence the present invention contemplates the fabrication of containers formed of paper in sheet form, in which the several component elements of the container are so shaped and. so assembled together that the liquid with which the container is filled does not have at any time access to the edge of a sheet.

It is also highly desirable that a container when fabricated of paper be rendered resistant to the penetration of moisture from without since the strength of its wall decreases as the moisture content thereof increases and the penetration of a substantial amount of moisture into the wall of a paper container from the outside thereof will result in its early failure. The invention contemplates, therefore, a paper container both the exterior and interior surfaces of which have been rendered impervious to moisture. All interior surfaces of the container are coated with -a suitable moisture-proof coating composition. The exterior surfaces thereof maybe so treated or may be protected against moisture by the application of a moisture-resistant envelope. This envelope may be in the form of a label secured to the outer surface of the container by means of an adhesive or in the form of a tubular envelope telescoped over the container body and secured in position, for instance by crimping the ends of the tube inwardly over the container endclosures.

Various forms of the invention are indicated in the accompanying drawings, in which:

Figure 1 is a side elevation of. a preferred form of container, partially broken away to show the details of construction;

Figure 2 is an axial section through portion of a container of the type shown in Figure 1, the end closure construction of the container of Figure 2, however, differing in minor respects from the end closure of the container shown in Figure 1;

' Figure 3 is a plan viewon a reduced scale of the paper blank from which the body of the container shown in Figure 2 is fabricated;

Figure 4 is a view similar to Figure 2, the section being taken, however, through a third form of container;

Figure 5 shows partially in elevation and partially in section a container of the type shown in Figure 1, one end of the container having been removed, and a pouring funnel being positioned thereon;

Figures 6 and '7-are views similar to Figure 1 but showing modified forms of containers.

The principal member of each of the containers shown comprises a tubular body, preferably a hollow cylindrical body formed by winding a blank upon a cylindrical mandrel, the wall being built up of several plies or convolutions of paper secured together by an adhesive. The tubular body of the container shown in Figure 1 is indicated at I and is three plies in thickness. The closures for the end'of the body Ill are identical and one such closure will be described. It comprises two discs, an inner disc II and an outer disc H, the inner disc ll having a peripheral cylindrical flange I3 and the outer disc I! having a peripheral cylindrical flange H. The inner disc lies wholly .within the container body and the cylindrical outer surface of its flange I3 is secured to the inner surface of the body In by a suitable adhesive. It will be observed that short, cylindrical portions of the body Let the ends thereof, are inwardly displaced. This is accomplished by rolling or pressing operations. The peripheral flange llof the outer closure disc I! fits snugly in the recess thus provided by the Prior to assembling the several parts of the container the inner surface of the container body I0 is thoroughly coated with a film of a substance having the capacity to resist the penetration of the liquid commodity which the container is intended to receive. Where the container is primarily designed to receive and dispense oils this coating may advantageously be glue, since glue is resistant to the action of oils and oily substances. Thereafter the inner disc ll of the end closure is applied after the face of this disc, and the exterior surface of its peripheral flange l3, has been coated with a suitable moisture penetration-resisting film. The film of coating material on the inner surface of the body I0 is indicated at It and that on the disc II at H, these two films merging in the cylindrical joint between flange l3 and the cylinder wall. Prior to assembly of the closure disc |2 a coating I8 is applied to one face and to the cylindrical inner surface of flange l4. Advantageously this coating material may also be ,glue and the disc is applied while the glue is moist. To prevent the escape of air trapped between the discs II and I2 theouter disc I2 is perforated at l9 and to effect closure of this perforation after assembly has been completed, a sufficient quantity of coating substance is placed on the inner surface of disc |2this coating substance running into the aperture l9 and securing the same after assembly of disc I2 has been completed. Naturally the container is charged before the application of the second end closure. The label |5 applied exteriorly is preferably of moisture-re- .sisting material such as thin paper, treated with a substance to render it moisture-proof. The container thus formed costs but little and is sufllciently strong to stand dropping or rough usage without leaking.

When its contents are to be removed one entire and may be taken off,as for instance by cuttingthe body In and label l5 along the line (1-4:, Figure l. Thereafter a paper funnel 20, in the form of a hollow frustum of a cone is slipped over the open end of a container so that its contents may be readily discharged into a restricted opening upon inversion'of the container and funnel. Both container and funnel may be destroyed by burning after the contents of the container have been removed.

In Figure 2 a slightly modified form of container is shown in which the recess for the reception of the flange 22 of the outer closure disc member 23 is formed by a cutting or grinding operation. Or, alternatively, the body of the container may be fabricated of a blank or paper sheet such as indicated at 25 in Figure 3, that portion of the sheet which will comprise the last or outer convolution of the body after the sheet has been wound onto themandrel being cut away as indicated at 26 so that, after the cylindrical body has been completely formed it will have exterior annular recesses or grooves at its ends which terminate in well defined shoulders, one of which is shown in Figure 2. A label or envelope of moisture-proof material, such as coated or impregnatedpaper, isindicated at 21 and for the same purpose, as is the generally similar envelope l5 shown in Figure 1. Layers of coating material upon the body and end discs are indicated respectively at 28, 29 and 30.

The form of the invention disclosed in Figure 4 is generally similar but in this form the ends of the tubular body 35 are not recessed to receive flanged disc.

ure 6 the flanged end discs 4!! and 4| are nestedas shown and the moisture-proof envelope 42 covers the entire outer surface of the cylindrical paper body 43 and has its end margins inturned and extending between the flanges 44 and 45 of the end closure discs 4|) and 4|, respectively, be-

ing secured to these flanges by a suitable adhesive. In the case of this form of the invention the container body 43 is interiorly coated as before, likewise the inner surfaces of both discs 40 and 4|, and the flanges of such discs. If desired, the discs 40 and 4| 'may be dipped in a coating substance such as glue so that all surfaces thereof are coated with the moisture-resisting substance.

In the form of the invention shown in Figure 7 the body has its ends inwardly pressed or displaced and each end closure comprises an inner disc 5| and an outer disc 52, the flange 53 of the inner disc being attached to the cylindrical inner surface of the inwardly displaced end portion of the body 50 and the flange 54 of the outer disc 52 lying within the recess formed by the inward displacement of the end of the body. Instead of an envelope which is secured to the outer surface of body ID by means of an adhesive, as in the case of the forms of the invention shown in Figures 1, 2 and 6, an envelope 55 which comprises a paper tube is telescoped over the body 50, its inner surface closely fitting against the outer surface of body 50. After it is thus assembled the ends of the envelope 55 are laterally and inwardly crimped as shown in Figure 7 so as to overlie and engage the outer end disc 52, the envelope by this means being retained in position and likewise serving to positively hold the closure discs 5| and 52 in position. The container thus formed is particularly well suited to withstand mechanical shock. In its formation all surfaces which may be exposed to contact with the liquid commodity within the container are adequately coated with moisture-resisting substance and this coating material is applied to the mutually facing surfaces of discs 5| and 52 so that these surfaces are rigidly attached to each other. If desired, the closure discs 5| and I52 may be dipped in the coating material prior to assembly with the body 50.

In each instance the closure discs are fabricated of paper and are formed by pressing or drawing'a flat paper sheet into the form of a The cost of each element of the container is relatively slight and all such elements may be quickly and easily assembled to form the completed container. The container will hold a body of liquid for 'a long period of time without weakening in the slightest, is readily opened, and may thereafter be easily disposed of by burning.

Having thus described the invention, what is claimed as new and desired to be secured by Letin Figure 2 and is applied in the same manner, .lters Patent is? 1. In. a paper container, a cylindrical body comprising a convolutely wound strip of paper, the outer convolution being narrower than the inner convolutions, thus providing 'an external annularrecess at one end of said body, an end closure disc seated against the end of said body and having a peripheral flange lying in said recess, a second closure disc within the said body w of said body also provided with a cylindrical and provided with a peripheral flange engaging the inner wall surface of the body and extending toward the first disc.

2. In a paper container, a cylindrical body comprising a convolutely wound strip of paper, the outer convolution being narrower than the inner convolutions, thus providing an external annular shoulder adjacent and facing one end thereof, a closure disc overlying the end of the body and having a peripheral cylindrical flange encircling the container end and seating against said shoulder, and a closure disc within the end flange, the side of said flange engaging the inner wall surface of said body and its edge abutting said exterior closure disc.

3. ma paper container, a cylindrical body I comprising a convolutely wound strip of paper, the outer convolution being narrower than the inner convolutions, thus providing an external annular recess at oneend of said body, an end closure disc seated against the end of said body and having a peripheral flange lying in said recess,. a second closure disc within the said body and provided with a peripheral flange engaging the inner wall surface of the body and extending toward the first disc, a moisture-proof envelope encircling said cylindrical body, the cylindrical margin of said envelope overlapping and being secured to the outer surface of the flange of the end closure disc.

CHARLES K. DUNLAP.

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