One-way valve for discharge regulation in tubes, tube with such a one-way valve and method for manufacturing such a one-way valve

A tube with a tube head, a container and a one-way valve comprising a sealing means and a ring support, with the sealing means being at least partially inserted in the ring support, wherein the sealing means comprises a sealing element and a support element with at least one opening, wherein the sealing element is connected to the support element by anchoring means and rests on the ring support in a closed state of the one-way valve thereby covering the at least one opening, wherein the sealing element is of lower bending stiffness than the support element and the ring support, wherein the sealing element of the sealing means is discoidal or has a discoidal part with its rim portion resting on the top end of the ring support in the closed state of the one-way valve,

• wherein the tube head comprises a port, a hollow neck and a shoulder, with the port being connected to the neck and the neck being connected to the container via the shoulder, wherein the one-way valve being inserted in the neck with the ring support of the one-way valve being sealingly fixed to the neck, wherein the sealing element and the ring support of the one-way valve are designed such that the sealing element rests on the ring support when the tube is not compressed and that the sealing element is lifted off the ring support and at least partly off the support element when the tube is compressed thereby enabling the one-way valve to be in an open state and
• wherein the ring support is fixed to the neck such that the sealing element is bent so far into the head space that it closes the entrance to the port when the tube is compressed and the internal pressure of the tube exceeds a certain limit.