JPS6330673A - Integral valve of sealing bag-shaped body and manufacture thereof and device used for said method - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealed bag-like integral valve device, a method for manufacturing the same, and a device used in the method.

The valve of a sealed bag, in particular an inflatable bag, as is known, comprises an element constituting a body separate from the bag;
Also, a portion of it often protrudes outside the pouch. Inflatable balloon valves, as is known, include an air bladder, and particularly balloons made from hot-cast synthetic material bladders, include an orifice provided for their inflation. This orifice generally constitutes a separate body from the balloon and is made as a device that must be fixed to the mold before casting,
The device is then covered by the balloon and while taking care that the orifice inlet and outlet are retained.

This device has the disadvantage that the air bag can only be inflated, not deflated. Furthermore, the inflation process is delicate, and balloon inflation is often done in factories. Because balloons cannot be deflated, their transportation and storage require considerable space.

The object of the present invention is to provide a hermetic bag, in particular, but not exclusively, an inflatable bag, in particular an air bag, at any time without having any elements protruding from the outside of the bag. The present invention consists in providing an inflatable balloon with an integrated valve device having a valve to enable inflation and deflation.

To this end, the present invention relates to an integral valve of a sealed bag formed as part of the wall of the bag.

The invention also relates to an inflatable bladder, in particular an inflatable balloon with an air bladder in which the portion of the wall in which the valve is formed is attached to an orifice in the balloon wall and secured to the wall surrounding the orifice. It is related to something. The present invention also relates to a method for manufacturing a valve and an apparatus for use therein.

The invention will become clearer from the following description, based on the drawings, of an embodiment of the invention as applied to a balloon, given by way of non-limiting example.

As shown in Figure 1, the balloon is equipped with an air bladder 1 containing a valve made in its wall. The valve has an inner recess 2 which communicates with the outside of the bladder by holes 3 and with the inside of the bladder by four holes 4. A valve element 5, the lower part of which is an integral part of the air bladder, occupies the central part of the recess 2. It comprises an upper front part 6 located opposite the upper inner wall 7 of the recess.

The hole 3 is installed in the central part of the upper wall of the recess.

When the balloon is inflated, the air bladder is elongated, its thickness decreases, and the cross-sectional area of the hole 3 increases as well as the width of the recess 2.

On the other hand, the size of the valve element 5 remains unchanged and the valve element is only subjected to a slight pressure at its base. The upper front wall 6 of the valve element therefore contacts the upper inner wall 7 of the recess, since the height of the valve does not actually change and the thickness of the bladder decreases.

As shown in FIG. 2, the reduction in the cross-sectional area of the hole 3 is such that when the air bladder is pressurized, the increased cross-sectional area of the hole 3 is smaller in size than the cross-sectional area of the front surface 6 of the valve element; It is also selected such that at least a portion of the front surface 6 contacts the earthen wall of the recess and continuously contacts the circumference of the hole 3 to prevent deflation of the balloon.

When the balloon is inflated, the internal pressure of the bladder is considerable, so that the conduit in the hole 4 is deformed, and this deformation is to some extent
Helps improve valve seals. To deflate the balloon, a suitably shaped object can be introduced inside the hole 3 to press against the front face 6 of the valve element and, if necessary, torsion the valve element to move it away from the hole. allowing the air contained inside the bladder to escape through the holes 4, the recesses 2 and the holes 3.

According to a preferred mode of manufacture, the valve is made by casting, casting the bladder. FIG. 4 shows, by way of example, a device 10 adapted to make it possible to cast a valve by screwing it into a mold. The device 10 comprises a barbed bar 11, a disc 12 having a diameter larger than the diameter of the bar 11 and placed at one end of the bar 11, and a bar element 13 placed on the opposite side of the disc 12 and extending to a bell-shaped element 14. We are prepared. Rod 11, disk 12, rod 13 and bell-shaped element 14 are coaxial and form an integral device. The walls of the bell-shaped element are thin and are provided with four constricted portions formed in such a way that they constitute four protruding portions 15 . The drawing rod 11 of the device is for introducing into the casting hole 17 before casting the bladder, and the napht 16 makes it possible to lock the device onto the mold. The device allows valves to be made during the casting of the bladder,
and the protruding part 15 respectively make it possible to make the hole 3, recess 2 and hole 4 of the valve, and the material accommodated inside the bell during casting constitutes the valve element 5.

When the casting of the bladder is complete, removal of the bladder from the mold is accomplished by simply separating the bladder from the mold. Once fixed to the mold, the device IO is easily removed from the bladder. This is how the valve is completed.

The above description relates to an inflatable balloon with an air bladder having a valve according to the invention. Of course, the valve of the invention can be made to the thickness of the entire bladder or a portion of the bladder, such as an inflatable port or an inflatable buoy, which is to be filled with air. . When the bladder is made of less elastic material, it can be utilized to provide a valve with an additional blocking element.

In the embodiment shown in FIG. 3, the valve is made of rubber, for example.
A pole 9 can be provided of synthetic material, steel or other material and of a diameter larger than the diameter of the hole 3 when the bladder is pressurized. This ball is placed at the base of the hole 3 in the front face 6 of the valve element between the part of the upper wall 7 of the recess installed at the base of the hole and the front face 6 of the valve element when the bladder is pressurized. Compressed.

In a variant intended to facilitate deflation of the bladder, the ball-shaped element 9 has a first hole 3 reaching from the outside of the bladder, as indicated by the dot-dash line in FIG. It is provided with an operating rod 18 that can be passed through.

As indicated by the dotted line in FIG.
The disc 12, which surrounds the leg of the bag 1, can be called a disc 12a and 1f, which form an annular flange with a diameter larger than the diameter of the disc 12, with its surface facing inward of the bag. is provided with an annular rib 12b in the wall of the bladder so as to produce an annular groove 19, when cast, of a cross-section complementary to that of the rib 12b and shown in dash-dotted lines in FIG. This groove 19 creates a corresponding -i-like thickness of the wall of the bladder, i.e. surrounding the valve.

The above-mentioned valves can also be made by casting small surface elements, which are fixed, for example by glue or adhesive, and can be inflatable or non-inflatable.
For example, a bag such as an inflatable boat or an inflatable buoy is constructed, and an evaporator or tube containing the pasty product is dispensed in small quantities. In this latter case, the valve has the function of preventing undesired introduction of product into the pipe after it has been filled.

The foregoing description of specific embodiments fully discloses the general nature of the invention, and others may be easily modified and/or modified for various uses by the application of modern knowledge.
or may be commonly used, and such specific embodiments do not depart from the general concept of the invention, and such adaptations and variations are therefore construed within the meaning and equivalents of the disclosed embodiments. within range. It is to be understood that the expressions and terminology used in the Mokumei fJII book are for purposes of explanation and limitation.

[Brief explanation of the drawing]

FIG. 1 is a partial radial cross-sectional view of an inflatable balloon with an air bladder having a valve according to the invention, before inflating the bladder; FIG. 2 is a pressurized view of the balloon after inflation. The first part of the air bag
FIG. 2 is a partial radial cross-sectional view of the balloon shown in FIG. FIG. 3 is a partial radial cross-sectional view of a variant of the valve of the invention. FIG. 4 is a perspective view of an embodiment of a device for screwing into a mold before casting the bladder, allowing the manufacture of the valve by casting; 1--air bag, 2-recess, 3,4--hole, 5-
Valve element, 6--upper interior (of the valve), 7--upper inner wall, 9- ball, io-device for valve casting, 12-.
...-disc. 14--Bell-shaped element, 15--Protruding portion F! Gj FIo, 2 Procedural Nerti Author (Spontaneous) October 2, 1986

Claims (1)

[Scope of Claims] 1. An integral valve of a sealed bag-like body, wherein the sealed bag-like body is provided with a continuously cast wall having an inner side and an outer side, wherein the integral valve has a wall and a wall of the bag-like body. An integral valve of a sealed bag formed integrally with and from the same. 2. An inner recess that communicates with the outside of the pouch through a first hole; at least one second hole that communicates between the inner recess and the inside of the pouch; and an integral part of the pouch. 2. A valve according to claim 1, comprising a partial valve element, said valve element occupying a central portion of the inner recess. 3. The valve element has a front surface located towards the upper wall of the recess around the first hole; the cross-sectional area of the first hole is such that the part of the bladder wall in which it is formed When pressurized and the cross-sectional area of the first hole increases, the size of the valve front surface is larger than the increased cross-sectional area of the first hole; the valve front surface forms a recess surrounding the first hole. Claim 1: contacting a portion of a wall of the bladder to create a continuous contact surface around the first hole to prevent fluid contained within the bladder from passing through the first hole. The valve according to item 2. 4. A globe-shaped element having an outer dimension larger than the cross-sectional area of the first hole is installed between the first hole and the valve element; surrounding the front surface of the valve element and the first hole. 3. The valve of claim 2, wherein a portion of the wall of the recess contacts the valve element so as to prevent passage of fluid within the bladder through the first hole. 5. The valve of claim 4, wherein the valve element comprises an actuation rod passing through the first hole. 6. A valve according to claim 4, wherein the bladder is made of hot cast synthetic material. 7. The valve according to claim 1, wherein the bag-like body contains pressurized fluid. 8. A valve according to claim 1, wherein the portion of the bladder wall in which the valve is formed is attached to an orifice in the bladder wall and secured to this wall around the orifice. 9. A valve according to claim 8, wherein the part of the wall in which the valve is formed is subjected to pressure before being fixed to the wall of the bladder. 10. An inflatable balloon, wherein a portion of the wall of the bladder is configured to form at least a portion of a valve according to claim 1. 11. A method for manufacturing an integral valve, in which the valve is cast into a casting center of the wall of the pouch. 12. The casting of the wall of the bag is carried out in a mold in which the device for forming the valve by casting is fixed, and the mold is removed before the bag is cooled.
The method described in section. 13. A device with a threaded rod that is screwed into the mold before casting;
A generally bell-shaped integral part is provided to define a recess in at least a portion of the thickness of the wall of the pouch during casting, and after said bell-shaped part is removed from the mold, the recess and the wall of the pouch are separated. a casting device comprising at least one protruding portion for forming a communicating conduit between the inner surface of the casting device and the inner surface of the casting device; 14. The device of claim 13, wherein the device includes an annular flange located within the housing on the inner surface of the mold; and wherein the device has an annular groove creating an annular rib in the wall of the bladder.