US2423889A - Watertight bag - Google Patents

Description

July 15, 1947. v. H. HURT WATERTIGHT BAG Filed June 24. 1943 mmv "mmm umumuiuur m rzoRNEY July l5, 1947. v, H HURT v 2,423,889

Y WATERTIGHT BAG FledvJune 24,7 1943 2 Sheets-Sheet 2 INVENTOR d70/ H. HIJ/f7 ATTORNEY Patented July 15, 1947 WATERTIGHT BAG `Victor H. Hurt, Cranston, R. I., assignor to United States Rubber Company, New York, N. Y., a corporation of New Jersey Application June 24, 1943, Serial No. 492,059

(Cl. G-52) 7 Claims.

This invention relates to watertight bags and more particularly to bags of this type having a large opening and a folding neck for `closing such opening.

Some of the features of the present invention may be used in various types of bags having a folding neck closure, but the invention relates more particularly to a bag comprising a receptacle which is more or less square or rectangular in shape and has a folding neck closure adapted to open and close one entire end o-f the receptacle. Such la bag is well adapted for use as a watertight container in which food, clothing and eld equipment may be protected from the weather on land or at sea. It also forms a watertight and airtight buoyant container which will float when dropped into the sea.

The purpose in forming the bag with such a large folding neck closure is to enable the bag to be used as a watertight cover or container for radio equipment or other instrument enclosed in a cabinet that fits snugly within the bag. When the bag is so used it must have a large opening through which the cabinet can be introduced and removed.

It has been proposed heretofore to provide watertight bags or containers with especially constructed slide fasteners that are designed to eX- clude water, but the opening provided by such slide fasteners is considerably smaller than the cross-sectional area of the bag or container and therefore is not large enough for the purpose herein contemplated.

One important feature of the present invention resides in a watertight bag that is shaped to fit closely around a cabinet or casing and which is provided with a watertight folding neck closure that has an opening large enough to receive the cabinet or casing. The neck of such a bag will be wide enough when in a flat condition to project beyond the sides of the bag, so that when this neck is folded or rolled down to close the opening the roll will proj ect beyond the side walls of the bag. The present invention therefore further contemplates the construction whereby these protruding rolled ends may be folded down against the side walls of the bag and held in this position.

Another feature of the present invention resides in a watertight bag having a folding neck closure that is free from metal parts and which closes the bag so effectively that it will conne air therein to increase the buoyancy of the bag so that it will float in water.

Another feature of the present invention resides in a cover flap adapted to be secured down tightly over an end of the bag in position to conne the folded neck closure between this flap and an end of the bag so as to render the bag water tight and air tight.

Still another feature of the present invention resides in the construction of the end opening of theneck whereby the edge portion of the neck opening is sumciently stiff to form a bar upon which the neck may be rolled, and one end edge portion is held in register with the other as the neck is folded or rolled down upon itself Ito close the opening; while at the same time the end opening of the neck is flexible enough to permit it being opened fully, and the protruding portions of the rolled neck can be folded down against they sides of the bag.

The above and other features of the present invention will be further understood from the following description when read in connection with the accompanying drawings wherein;

Fig. l is a perspective view of a box-shaped watertight bag of the present invention shown closed;

Fig. 2 is a similar view showing the bag open;

Fig. 3 is a sectional View taken on the line 3--3 of Fig. 1;

Fig. 4 is a sectional view taken on the line 4-4 of Fig. 1;

Fig. 5 is a transverse sectional view taken through a portion of the bag neck and shows how one end edge of the neck is held in register with the other end edge; and

Fig. 6 is a perspective view of an upper end portion of the neck showing the construction of the seam along a folded side edge of the neck.

The bag illustrated in the drawing is constructed of waterproof or rubberized fabric and is designed to give good service even when subjected to hard usage. The construction is such that the neck opening and all other parts of the bag may be entirely free of metal parts except possibly for the straps used to hold the end flap buckled down in its closed position. The bag may be made of any desired size and shape and is shown as having the shape of a rectangular box provided with the front wall I0, rear wall I I, side walls I2, bottom wall I3 and a closure neck It which is tightly secured to the upper ends of the walls I0, II and I2 and forms the closure for the entire upper end of the bag. The vertical edges of the bag are preferably rounded as shown and are strengthened by the covering strips I5, and the bottom wall I3 is shown as having its marginal edge I6 folded up around and adhesively secured to the Vertical Walls of the bag. Over the upwardly folded edge IS is provided the protecting strip I'I extending entirely around the lower portion of the bag. The parts of the bag so far described by reference numerals may be formed of canvas which is friction coated on both faces with rubber or other Waterproofing material, and the exposed face of such fabric is preferably also skim coated with rubber or the like. The canvas is friction coated by passing it between two calender rolls one of which runs at a higher speed than the canvas so that this roll will rub or friction the rubber material into the fabric. This diers from straight calender coating or skim coating wherein both rolls and the fabric run at the same speed, in which case the rubber material can be forced into the fabric by pressure only to the point of its viscosity resistance.

The closure neck Iii may be formed of similar material except that it preferably is not skim coated so that it will be sufficiently flexible to be easily folded or rolled down upon itself to close the bag. The neck is relatively long and wide as shown and may be constructed of a single piece of material extending entirely around the upper end of the bag to which it is adhesively secured with a watertight joint, and the edge portions of such fabric are secured to gether alo-ng both of the vertical seams I8 in a fiat condition for a .purpose to be described.

Since the neck It has a, cross-sectional area of approximately the same size as the correN sponding cross-sectional area of the bag proper the width of this neck is such that when its up per edge portions are brought together the flatn tened neck will project some distance beyond the sidewalls I2 of the bag, and when this neck is folded or rolled down upon itself to close the bag the ends of such roll will project beyond the side walls of the bag as will be apparent from Figs. l and 3, wherein these rolled end portions are shown as folded down along the sidewalls I2 of the bag.

It is desirable that the upper edge portions of the bag neck be relatively stiff so that when these upper edge portions are brought together they will together form a bar upon which the neck I 4 may be rolled as it is wound down into position to rest upon the top of the receptacle or bag proper. This may be secured by increasing the stiffness of the upper edge portions of the bag neck. In the construction shown it is secured by providing the relatively stiff fabric strip I9 along the upper edge of one side of the neck and the fabric strip Zii along the upper edge of the opposite side of the neck.

It is important that the strips il? and 20 be maintained in registered relation as the neck is wound about these strips, since the crowding of the fabric at one side of the neck during this winding operation tends to shift one strip laterally, that is in a direction perpendicular to its length, relative to the other in a manner which may cause the neck opening to leak. To avoid this the strip 2D is preferably provided with the folded over portion 2l that is vulcanized in this folded condition to form a pocket in which the strip I 9 is inserted as best shown in Fig. 5. This simple construction retains the strips I9 and 20 in the desired registered condition and forms a relatively stiff bar about which the neck is Wound as it is rolled down to close the bag opening.

It is found important to provide at adhesively sealed seams I3 at the opposite edges of the bag neck as shown in Fig. 6, because if these seams are not sealed in a tightly folded condition they tend to form a, small air channel through the rolled neck through which air may leak from the bag or water may enter the bag.

After the neck I4 has been rolled down upon itself to close the bag opening, it is protected by the cover iiap 22 adapted to cover the entire upper end of the bag. This cover flap as shown is permanently secured to the rear wall II of the bag by the seam 23, and the flap is provided at its front edge and side edges with the buckles 2d adapted to be engaged by the straps 25 secured to the front Wall I0 and the side Walls I2. When the iiap 22 is buckled down as shown in Fig. l the rolled neck I4 will be completely covered by this flap and will be gripped between this flap and the upper end of the bag as illustrated in Figs. 1, 3 and 4, with the ends of the roll I4 held down along the side walls I2 of the bag.

The entire bag may be built up from unvulcanized rubberized fabric, upon la hollow form of the desired shape, and then the bag may be closed as shown in Fig. 1 about such forni, whereupon the bag is placed in a closed vulcanizer. After it is vulcanized itmay be opened up as in Fig. 2 so that the form can be removed.

While in the construction herein shown and described the closure neck is so large that when it is rolled down upon itself the roll ends project beyond the sides of the bag, it is to be understood that some of the features of the present invention may be used upon a neck which does not so project beyond the sides of the bag.

As a result of the present invention the opening of the bag is very effectively closed so as to exclude water therefrom, and the rolled neck closure isl so tight that air can be confined in the bag even when it is subjected to a substantial flattening pressure.

Having thus described my invention what I claim and desire to protect by Letters Patent is:

1. A water-tight and air-tight bag comprising, a box-like receptacle of watertight material, a closure for the receptacle consisting of a relatively long and wide neck, stiiening strips permanently secured along the opposite sides of the neck opening and adapted when brought together to form a bar upon which the neck may be wound in a roll that rests against an end of the receptacle, means permanently secured to one stiifening strip for holding the other stiiening strip throughout its length from moving laterally thereto during the rolling of the neck, and a cover flap having means for securing it down over said end of the receptacle in position to coniine the roll between the receptacle and flap, whereby a closure capable of containing air under pressure is provided.

2. A water-tight and air-tight bag comprising, a receptacle of water-tight material, a closure for the receptacle consisting of a long neck that is wide enough when in a fiat condition to project beyond the sides of the receptacle and adapted to be wound in a roll that rests against an end of the receptacle with the ends of the roll projecting beyond the sides of the receptacle, said projecting ends of said roll containing the edge of said neck opening being adapted to be bent along said sides, and a cover flap having means for securing the projecting ends of said roll against the sides of said receptacle and the intermediate portion of said roll against said end of the receptacle in lposition to conne the roll between the receptacle and flap, whereby a closure capable of comining air under pressure is provided.

3. A water-tight and air-tight bag comprising, a receptacle of water-tight material having an integral neck the transverse area oi which is approximately as large as the corresponding transverse area of the receptacle, said neck being adapted to be wound in a roll that rests against an end of the receptacle with the ends of the roll protruding, means for holding the edge portions at the outer end of the neck aligned as the neck is rolled upon itself, and a cover flap having means for securing it down over said end of the receptacle in position to confine the roll between the receptacle and ilap and with said protruding ends folded down against the sides of the receptacle, whereby a closure capable of conning air under pressure is provided.

4. A water-tight and air-tight bag comprising, a receptacle of water-tight material having an integral neck of substantial width, a pair of stifening strips secured to the opposite sides of the neck opening in position to rest one against the other t0 form a bar upon which the neck may be rolled down against an end of the re ceptacle, means permanently secured upon one strip and having a folded-over edge forming a pocket for holding the other strip from moving laterally thereto during the roliing operation, and a flap adapted to be secured down over said end of the receptacle against the rolled neck, whereby a closure capable of conning air under pressure is provided.

5. A Water-tight and air-tight bag comprising,

a box-like receptacle of water-tight material having an integral neck of substantial width, a pair of stiffening strips permanently secured to the opposite sides of the neck opening and adapt-- ed together to form a bar upon which the neck may be rolled down against an end of the receptacle, means permanently secured to one.

receptacle, whereby a closure capable of conning air under pressure is provided.

6. A water-tight and air-tight bag comprising, a receptacle of water-tight material having a wide integral neck, a pair of stifening strips permanently secured t0 the opposite sides of the neck opening and one strip being provided with a folded over edge along its length forming a pocket for the other strip and adapted together to form a bar upon which the neck may be wound t0 form a roll that closes the bag opening, the said pocket being adapted to hold one strip from moving laterally relative to the other during the rolling of the neck, and a flap for holding the neck in this wound condition, whereby a closure capable of confining air under pressure is provided.

7. A water-tight and air-tight bag comprising, a receptacle of water-tight material having a wide integral neck formed with flat adhesiveclosed seams at its opposite folded edges that avoid the formation of air channels along these seams, a pair of stiiening strips permanently secured to the opposite sides of the neck opening and one of the strips having a folded-over edge forming a pocket for the other strip to hold the strips properly aligned so that the strips together form a bar upon which the neck may be wound in a roll that closes the bag opening, and a flap for holding the neck in this rolled condition, whereby a closure capable of confining air under pressure is provided.

VICTOR H. HURT.

REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS Number Name Date 1,814,614 Barnes July 14, 1931 1,689,396 Lang Oct. 30, 1928 1,671,385 Strayer May 29, 1928 214,771 Gathright et al Apr. 29, 1879 1,995,950 Stone Mar. 26, 1935 2,087,611 Wells et al July 20, 1937 2,000,928 Cundall etal. May 14, 1935 1,661,143 Littman Feb. 28, 1928 2,356,602 Madsen Aug. 22, 1944

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