Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1997-06-10
1999-03-09
Rivell, John
Fluid handling
Processes
Cleaning, repairing, or assembling
446224, 137848, 137223, A63H 2710, F16K 1520, F16K 1514
Patent
active
058787682
DESCRIPTION:
BRIEF SUMMARY
This invention concerns a one way valve for inflatables such as balloons with at least one internal layer of heat weldable material. This valve is of the type which allows the input of gas into the inflatable and shuts off the valve as a result of the bending action of the pressure of the gas inside the balloon. This invention also concerns a manufacturing process for the valve and a process for fitting it into the balloon. From this point on we shall call "balloon" any ball or inflatable to which this valve can be fitted.
BACKGROUND OF THE INVENTION
A valve type which is already known consists of two laminar strips of different lengths which are joined together by lengthwise weld lines. This forms a laminar valve shaped like a tube with one end open for the intake of gas which is accessible from the outside and one outlet end opening into the inside of the balloon. On the entry end of the valve there is a flap made up of an extension of one of the strips. This protects the balloon sheet like material to which the valve is welded. Moreover, in the area next to the end of the valve input one of the strips has an non-weldable covering which reaches a location close to the flap. Thus, when the valve is being welded to one of the sheets which make up the balloon the opening is not blocked.
One problem with this type of valve is that the protective flap on the end of the entry opening does not sufficiently prevent damages to the balloon when the inflation nozzle is used.
Another problem concerns the correct placing of the prefabricated valve into one of the internal faces of the balloon in order to weld together the valve and the sheets which make up the balloon. These problems with positioning make it difficult to obtain a fast and efficient production process.
DESCRIPTION OF THE INVENTION
In order to solve the problems explained above, the valve which the object of this invention was designed, along with the production process and method of incorporation into the balloon.
The valve is of the type which allows the input of gas into the inflatable and shuts off the same as a result of the pressure of the gas inside the balloon folding or bending over the exit. A valve of this type consists of two heat weldable laminar strips welded together by lines of welding which form a laminar valve shaped like a tube with one intake end, for gas input, accessible from the outside and one output end communicating with the inside of the balloon. Strips of weld cause internal strangulation in the valve to prevent the return of gas. One of the strips has an non-weldable covering that coincides with the valve opening. Based on the premises explained above, the valve is characterised by the fact that on one of the sides of the first strip in the area with non-weldable covering a second and third coplanar strips are welded, spaced out lengthwise, so that there is a crosswise space between them which coincides in part with the non-weldable area. This space is the opening for the entry of gas. The second and third strips respectively reach the end of the first strip.
One option is for the second and third strips to be of different lengths and to be welded to the first strip by lengthwise lines and a transverse line coinciding with the end of the valve closest to the entry opening. On the other side of this opening the two strips are welded by sloping lines which form a strangulated passage.
A second option is for the second and third strips to be of the same length so that the space for the entry is in the middle of them. The second and third strips are welded to the first strip by lengthwise lines and by two groups of sloping lines on either side of the entry opening which form various strangulated passages thus creating a double valve with open ends and a single entry. This double valve forms a nexus between two inflatables.
The production process for the valves and the method of incorporating them into a balloon is characterised by the fact that on one side of a first continuous strip of heat weldable material, with the in
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Rivell John
Schoenfeld Meredith H.
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