US2999387A - Fluid tight container - Google Patents

Description

Sept. 12, 1961 J, ANDELIN 2,999,387

FLUID TIGHT CONTAINER Filed Feb. 16, 1959 2 Sheets-Sheet 1 INVENTOR. J0///V AIVDEZ //V Sept. 12, 1961 J. ANDELIN FLUID TIGHT'CONTAINER 2 Sheets-Sheet 2 Filed Feb. 16, 1959 dew JM 9 M United States Patent Filed Feb. 16, 1959 Ser. No. 793,319

2 Claims. (Cl. 73-427) The present invention relates'to containers for acid, caustic, fertilizer, milk, body fluids such as blood, blood plasma and urine among numerous other liquids or powders with which it may be charged.

It is among the objects of the invention to provide a liquid tight container for the above purposes which avoids the use of glass, metal, rubber or molded plastic for the body of the container that may be of any size from one pint or less to or gallons or more, which is in the form of a sac or bag so that when empty it occupies but a small fraction of the space taken up by containers of glass, metal, vulcanite or the like, which is relatively inexpensive both in material and labor, and which is translucent or transparent and thus admits readily of reading the volumetric contents of the container when suspended by a hang cord.

In the accompanying drawings in which are shown one or more of various possible embodiments of the several features of the invention,

FIG. 1 is a front elevation with parts broken away showing the sac in suspended relation;

FIG. 2 is a side elevation of the sac shown in 'FIG. 1;

FIG. 3 is a view in longitudinal cross section on a larger scale taken on line 33 of FIG. 2;

FIG. 4 is a transverse sectional view on a larger scale taken on line 4-4 of FIG. 2, and

FIG. 5 is a dropped perspective view showing the sac, its neck and cover in relation aligned before assembly.

Referring now to the drawings, the sac is desirably made of a thin plastic film stock preferably in the order of 6 mm. in thickness, which while preferably of polyethylene, may be made of other liquid tight film plastic such as vinyl resin or cellophane.

According to the invention, the sac preferably comprises a flat front face 10 and an identical flat rear face 11, preferably each rectangular in shape and is provided with a relatively rigid neck 12 firmly bonded to the sac. The neck has closure means adapted to be opened for filling with or removal of liquid or powder, such means being desirably a cover 13 that may be removably screwed upon the threads 14 molded in the neck member 12.

The neck member 12 is preferably provided with an integral peripheral outstanding fiat flange 15 at its bottom which is permanently attached to the sac as a unitary part thereof. Preferably the neck member is bonded to the sac about a circular opening .16 therein, the upright diameter of which opening extends along the connecting edge 17 between the front face 10 and the rear face 11. Thus, half of the circular aperture extends as a scallop 18 from the edge 17 in the front face and the other half extends as a similar scallop 19 in the rear face 11.

Desirably the film stock of the sac is formed from flat tube stock, heat bonded as at 21 along the bottom of the sac and also heat bonded as at 22 along the top after the assembly has otherwise been completed as hereinafter set forth.

In the preferred embodiment the neck member is made of the same molded plastic as the sac but is desirably injection molded and is of thickness in the order of inches. Preferably the base of the cover has a pair of lateral narrow upstanding ribs 26 to enhance its stiflness. Thus, the neck base flange 15 and its extension tongue of the flattened out circular 23 which extends upwardly from and is.'unitary and coplanar with the flange'15may readily be heat bonded to the sac as bestshown in FIG. 3. Thus, it will be seen that the base rim 15 and extension tongue 23 of the neck member become securely bonded about the rim aperture 16 in the plastic film sac.

Moreover, the end of the upper edge of the sac maybe and preferably is heat bonded as at 25 to the face ofthe extension tongue 23. After the assembly has been completed to the extent noted, by pressing the heated neck base 15, 23 against a reaction plate (not shown) intro-. duced into the bag to flatten out the film material 10, -11 about the circular aperture 16 so that the aperture extends in a single plane, then upon withdrawal of the reaction plate the upper edge of the bag may be heat sealed at 22 to complete the assembly and the right end portion of said heat sealed seam 22 is thenheat sealed at 25 to the extension tongue 23 of the neck base.

Desirably the front face of the sac has imprinted thereon scale markings 27 to indicate the volumetric contents since the film of polyethylene, vinyl resin, cellophane or the like is suificiently translucent if not entirely transparent to view the level of the liquid or powder contents therein.

For facility in reading the contents, the extension tongue 23 on the base of the neck has a small aperture 28 therethrough for the hang cord 29 by which the sac may be suspended with its oblique scale 27 upright and its scale markings 30 horizontal.

It will be seen that the sac as above shown and described is continuous about its entire periphery, the lateral edges 17 preferably integrally connecting the front and the rear face 10 and 11 and the lower and upper edges of the sac being heat sealed as at 21 and 22, re spectively. Only the neck member 12 and the associated aperture 16 afford access to the sac, and the neck member is sealed by the cover 13.

It will be seen that the neck member being applied as shown and described about the extended flattened aperture 16 across the edge 17 of the sac, the two sides of the sac become spaced from each other at the region of said neck member 12, so that there is no difficulty in filling the liquid or powder into the sac through the neck. Were the neck member located in one of the faces between the edges 17, the two component faces of the sac might be in close contact with each other, with the possibility of the liquid spilling over the rim of the neck member instead of entering the sac.

Liquid or powder may readily be discharged from the sac or bag as required by removing the cap 13 from the neck member 12 and pouring the contents or part of the same through the neck member, whereupon the cap may be reapplied to preserve the contents.

The sac affords a tight seal for the liquid or powder contents and minimizes the access of air and dust thereto so that the contents are kept in sterile condition.

The container, sac or bag is of such low cost that for most purposes it may be discarded instead of being returned to the supplier. However, where occasion arises to return the empty sac the shipping volume is but a small fraction of that incurred with glass or metal containers and the likelihood of breakage or distortion is at a minimum.

It will, of course, be understood that while it is preferred to make the sac or bag and the neck member of the same thermoplastic resin for ease of heat and pressure bonding, the invention is not so limited, because the neck member could be made of glass, metal, vulcanite or the like and could be bonded to the plastic film sac or bag by a separate adhesive.

As changes could be made in the above construction,

r. 1C6 Pat ented Sept. 12, 1961-,

and different embodiments of this invention could be made without departing from the scope of the claims, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Having. thus described my invention, what I claim asnew and desire to secure by Letters Patent of the United States is:

l. A fluid tight container comprising a pair of substantially identical opposed'rectangular front and back walls of flexible thermoplastic film material closed alongone side and along the top and bottom thereof and partially closed along the other side thereof except for a circular opening atthetop of such other side, said opening extending from its upright diameter along opposite walls of the container, and a rigid tubular neck member of molded plastic provided with an integral peripheral flange, said flange being heat bonded to said front and back walls adjacent said circular opening whereby to incilitate the introduction to and discharge from said container through said neck member of liquids and particulate solids, said neck member having a removable cover '4 r for sealing said container and said flange portion of said neck member including an extension tongue directed -up wardly-frorn said member in the plane of said flange beyond the top of said container and to which the upper corner of said container is heat bonded.

2. A fluid tight container as claimed in claim 1 in which the extension tongue has an aperture therethrough for a hang cord and in which the front wall of the container has oblique lines of volumetric scale markings which extend horizontally when the charged container is suspended from said hang oordi References Cited in the file of this patent UNITED STATES PATENTS Smith June 23, 1953

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