| A23 PIlPCT LG/KOE
C l a i m s
1. A non-return valve (100) intended to be joined to a container (11) intended for air or liquids, the non-return valve being formed of non-rigid plastic or rubber material (1, 15) and comprising an opening channel (2), the non-return valve (100) comprising a resilient device (5) on a flat outside of the non-return valve, characterized in that the non-return valve (100) is formed of a thin resilient sheet material (5), which extends along the opening channel (2) and is fastened received in a deflected arch on each side of the opening channel (2) in order to spread the material of the opening channel (2) laterally, and that said resilient sheet material device (5) is fixed by welding, riveting or under a thin plastic or rubber material (1, 15), which is welded along the outer sides of the opening channel (2) and which thereby forms a holder (16) for the resilient sheet material (5), which is arranged to be deflected and threaded in between one of the plastic or rubber materials (1) of the opening channel (2) and the plastic or rubber material (15) of the welded holder (16) .
2. Non-return valve according to claim 1, characterized in that the resilient sheet material (5) has projections (52) along side edges facing away from each other for retention function.
3. A method for forming a non-return valve (100) having a holding device (9) for a discharge pipe (12), when the discharge pipe (12) is in the holding device (9), the material (1, 15) that the non-return valve consists of being extended and flattened and seals at an opening channel (2), so that trash cannot come into the opening, characterized in that the formation of the non-return valve (100) comprises the steps of: joining two portions of the material (1, 15) which consists of plastic/rubber and which lies planely against each other by means of two weld lines (3) and which in that connection form said opening channel (2) between themselves, applying a weld line (14) on each side of said opening channel (2) for applying a resilient sheet material device (5) in the form of a thin resilient sheet material in the space formed thereby (50) on one side of the opening channel (2) , folding a portion of the material (1) and applying a weld line (6) transversely over the non-return valve (100) comprising a teflon film tape (10) in the opening channel (2), so that the folded material forms a holding device (9) for the discharge pipe (12), a second portion (53) of the material (1), forming part of the non-return valve (100), also constituting a gripping device (8) for use upon filling and emptying of a container (11), - separately, or at a common stage for the manufacture of the container (11), forming the non-return valve and the container (11) by mutually joining the non-return valve (100) to a said container (11) by means of a sealing weld (14) and to a Teflon film insert (10) in the opening channel (2), and then removing the Teflon tape (10) after which emptying and filling of said container (11) can be effected.
4. Method for forming a non-return valve (100) to be joined to a container (11) for air or liquids, the nonreturn valve (100) and the container (11) being formed of non- rigid plastic or rubber material (1, 1, 15) and comprising an opening channel (2) as well as a resilient device (5) in order to spread the material (1, 15) of the opening channel (2) laterally, characterized in that three layers of plastic or rubber material (1, 1, 15) laid together are joined along double weld lines (3, 14) in pairs, which in that connection between themselves form opening channel (2) and reception channel (50), respectively, for receipt of a said extending resilient device (5) and that in said reception channel (50) the resilient device (5) in the form of a sheet (5) of resilient material is let to be received in order to in deflected shape spread the material (1, 15) of the opening channel (2) laterally (55, 60) .
5. Method according to claim 4, characterized in that the non-return valve (100) is manufactured separately from the container (11) before joining of the non-return valve (100) to the container (11) . |
A23 PIlPCT LG/KOE
A non return valve and a proceeding to form a non return valve system to be fasten together inside a receptacle intended to contain air or liquid
The present invention relates to non-return valve systems for air-filled or liquid-filled containers formed of non-rigid plastic or rubber material and which forms non- return valve function for the container, which for instance consists of a mattress, cushion/pillow or a package, for air- filling or liquid-filling and which non-return valve system comprises an opening channel, where filling and discharge can take place, as well as holder device for a discharge pipe.
Prior Art and Problems
On the market, there are many different kinds of non-return valves. They are all more or less complex. In all cases, the same are difficult to be sufficiently tight. In addition, they do not have sufficiently great opening, which enables quick filling and emptying.
By among others US 3 282 412 A, US 5 308 163 A and US 5 772 034 A, non-return valves are known, which however do not have a resilient device such as is intended according to the present invention, and which has the intended construction and the effect.
US 2 568 976 A comprises a flexible valve, which is formed of a rubber spring (4), which is fastened internally in a container on the wall (7) thereof. Said spring (4) is in closed sealed position arranged to assume a curved shape so that the container also is formed with curved shape. Upon insertion of a pin (9) in a valve opening (8) of the container (7), which the valve (1) is fastened on, an emptying
channel 8 opens. However, the valve sits internally in the container 7 as well as that the spring is not formed of a resilient plate, which is received in a space of the valve. The known valve has the spring exposed to the contents of the container in contrast to the invention, where the spring is kept separated from the interior of a container. There are also other differences and disadvantages of the known said nonreturn valve .
Solution and Advantages
A first object of the present invention is to provide production technical advantages and also user advantages, and yet competitive prices as well as improve the quality of the containers by a simple and reliable non-return valve system as well as in addition a holder device for discharge pipe of the valve construction, as well as give possibility of great opening channel for quick filling and emptying .
Said objects are attained according to the present invention, the features of which are seen in subsequent claim 1. The opening channel 2 is formed between two portions
1, 1 of the film material lying against each other. On said portions 1, 1, two weld lines 3 are welded in the longitudinal direction, which form the opening channel 2 between themselves for tapping and tapping off air or liquid. A resilient function arises and which spreads the material in the opening channel towards the sides by applying a plane thin resilient, preferably, plastic sheet material 5, which is fastened in over the long sides of the opening channel in holder 16 formed for the spring 5. This is carried out so that the plastic sheet material 5 becomes deflected outward over the opening channel
2, which spreads the material in the opening channel 2 towards the sides 55, 60 between the sides 51 of the channel 50. The
fixing of the resilient plastic material sheet 5, takes place by, e.g., riveting, welding or that it is retained by welding together a portion of film material 15 after the long sides by applying a weld line 14 on each side of said opening channel 2 outside the opening channel 2, so that a holder 16 is formed in the form of a space 50 where the resilient plastic sheet material 5 may be threaded in and form a spring deflected over the width of the opening channel 2, which spring spreads the material towards the sides 55, 60 of the opening channel 2, which then becomes plane with reliable seal.
The invention is described below such as a number of preferred embodiment examples, reference being made to the appended drawings, in which
Fig 1 schematically shows a valve device inserted into an intended container,
Fig 2 shows the container having said valve arrangement,
Fig 3 shows the valve separately having the valve arrangement in closed sealed position, Fig 4 shows the valve arrangement in mounted position on container in opened position for letting out the contents from the container, and
Fig 5 shows a planar view of a spring element for the valve arrangement. Filling can be effected into the container 11 when the spring function subsides when air or liquid is filled into the container. Upon emptying of the container 11, a discharge pipe 12 is inserted into the opening channel 2 so that the non-return valve function is opened. Upon extraction of the discharge pipe 12, the non-return valve 100 shuts efficiently. The discharge pipe 12 may then be attached into the holder device for the discharge pipe 12 of the valve 9 if desired .
The holder device 9 for the discharge pipe 12 is provided by the fact that one of the portions of the nonreturn valve, one of the flaps 53, which are formed outside the container after the joining of the non-return valve 100 and the container 11, is folded twice and with a teflon film tape 10 in the opening channel 2 and is welded by applying a transverse weld line 6 transversely over the non-return valve 100 so that a transverse channel 9 is formed, which is sufficiently great so that the discharge pipe 12 can be inserted into and be stored therein. This also contributes to the outer opening of the non-return valve 100 being stretched out towards the sides at the replenishment opening and increases the safety so that trash cannot come into the non-return valve. A second portion 53 of the material 1, which forms a part of the non-return valve 100 also constitutes gripping device 8 for use upon filling and emptying of said container 11.
The non-return valve 100 is preferably welded into the container 11 with a shown adapted teflon film tape 10 in the opening channel 2 of the non-return valve so that the opening channel 2 is not welded up upon the joining of the valve 100 to the container 11.
The invention is naturally not limited to the embodiments described above and shown in the accompanying drawings. Modifications are feasible, particularly as for the nature of the different parts, or by usage of equivalent technique, without departing from the protection area of the invention, such as it is defined in the claims. For instance, parts may be manufactured in another order than what has been described and been shown above and in the drawings and/or separately and/or jointly.