A reusable dispensing container assembly, having a canister having a first end and a second end, the canister having an upper chamber to hold dispensable substance, an actuator arranged proximate the first end of the canister, in communication with the chamber, the actuator having a nozzle arranged to eject the dispensable substance, and, a deformable piston arranged within the canister below the upper chamber, the piston further arranged to sealingly engage an inner surface of the canister, the piston arranged for upward movement within the canister when the actuator is actuated, the deformable piston forming a lower chamber arranged to hold pressurized gas, the deformable piston comprising at least one integral external O-ring about its circumference arranged to sealingly engage the inner surface of the canister and maintain separation of the dispensable substance and the pressurized gas.

A reusable dispensing container assembly, having a canister having a first end and a second end, the canister having an upper chamber to hold dispensable substance, an actuator arranged proximate the first end of the canister, in communication with the chamber, the actuator having a nozzle arranged to eject the dispensable substance, and, a deformable piston arranged within the canister below the upper chamber, the piston further arranged to sealingly engage an inner surface of the canister, the piston arranged for upward movement within the canister when the actuator is actuated, the deformable piston forming a lower chamber arranged to hold pressurized gas, the deformable piston comprising at least one integral external O-ring about its circumference arranged to sealingly engage the inner surface of the canister and maintain separation of the dispensable substance and the pressurized gas.

A new method for fully automatically manufacturing a fluid container with a pressure unit is described, which pressure unit is mounted in a fluid container. In a station the high-pressure container of the pressure unit is mounted with the closure and the bottom part and is clamped at the upper and lower ends by clamping means and is rotated by rotating means associated with the clamping means. The rotating pressure unit is welded by first laser means and by second laser means, whereas the laser beam of the first laser means being directed to a first joint area of the bottom part of the pressure unit with the container, and the laser beam of the second laser means being directed to a second joint area of the bottom part of the pressure unit with the container, which first and second joint area are separated at a distance to each other.

A new method for fully automatically manufacturing a fluid container with a pressure unit is described, which pressure unit is mounted in a fluid container. In a station the high-pressure container of the pressure unit is mounted with the closure and the bottom part and is clamped at the upper and lower ends by clamping means and is rotated by rotating means associated with the clamping means. The rotating pressure unit is welded by first laser means and by second laser means, whereas the laser beam of the first laser means being directed to a first joint area of the bottom part of the pressure unit with the container, and the laser beam of the second laser means being directed to a second joint area of the bottom part of the pressure unit with the container, which first and second joint area are separated at a distance to each other.

The invention relates to a piston for an optionally pressurized container, the piston having a sidewall, an upper side and a bottom side, and at least a first circumferential seal, wherein at least the upper side of the piston is closed by a closure and made of a first elastic material, wherein the upper side is configured to deform upon a pressure change acting on the upper side, wherein the sidewall is made of a second material which is different from the first elastic material, wherein the first circumferential seal is positioned on the sidewall on its outer surface. The invention further relates to an optionally pressurized container comprising a piston as mentioned above, to a process of discharging a product from said container and to a process of manufacturing said container.

The invention relates to a piston for an optionally pressurized container, the piston having a sidewall, an upper side and a bottom side, and at least a first circumferential seal, wherein at least the upper side of the piston is closed by a closure and made of a first elastic material, wherein the upper side is configured to deform upon a pressure change acting on the upper side, wherein the sidewall is made of a second material which is different from the first elastic material, wherein the first circumferential seal is positioned on the sidewall on its outer surface. The invention further relates to an optionally pressurized container comprising a piston as mentioned above, to a process of discharging a product from said container and to a process of manufacturing said container.

The present invention relates to a method for manufacturing a pressurizable cylindrical vessel for use in a pressure control system for maintaining a constant predetermined pressure in a fluid container configured to dispense when in use a fluid contained in said fluid container at said constant predetermined pressure, characterized in that the manufacturing is by injection moulding. The invention also relates to a method for assembling a pressurizable fluid container configured to dispense when in use a fluid contained in said container at a constant predetermined pressure. In addition, the invention relates to a pressurizable cylindrical vessel, a pressurizable unit, a pressure control system, a bottom plate and a dispenser; as well as their methods of manufacturing. In a final aspect the invention relates to uses of said parts in a bag-on-valve type packaging or metal can type packaging.

A plastic pressure container has an essentially cylindrical container body with an opening closable in a pressure-tight manner by a valve attachment for dispensing a filling product. An interior plunger is arranged in a longitudinally displaceable manner along a longitudinal axis to subdivide the container body into a receiving chamber adjacent to the opening for the filling product and into a separated reservoir in a pressure tight manner, for a pressure medium. The plunger includes two circumferential sealing lips separated in the axial direction. An upper sealing lip extends into the receiving chamber and a lower sealing lip extends into the reservoir, and these are pressed in a fluid-tight manner onto an inner wall which delimits the interior of the container body, by pressure in the receiving chamber and reservoir.

A plastic pressure container has an essentially cylindrical container body with an opening closable in a pressure-tight manner by a valve attachment for dispensing a filling product. An interior plunger is arranged in a longitudinally displaceable manner along a longitudinal axis to subdivide the container body into a receiving chamber adjacent to the opening for the filling product and into a separated reservoir in a pressure tight manner, for a pressure medium. The plunger includes two circumferential sealing lips separated in the axial direction. An upper sealing lip extends into the receiving chamber and a lower sealing lip extends into the reservoir, and these are pressed in a fluid-tight manner onto an inner wall which delimits the interior of the container body, by pressure in the receiving chamber and reservoir.

A pressure control device for pressure packaging based on a disc with fluid connection and a collecting basin, with associated closing means. The closing mechanism in the pressure control device is no longer based on a cylinder with a central opening in the separation wall and closing-off of the opening by means of a piston with stem. The proposal is extremely simple, compact and easy to assemble. The use of O-rings is superfluous. A method for manufacturing a pressure control system and a kit of parts for the assembly thereof.