Abstract: A packaging unit has a cartridge for storing material and pressurized gas operating with it and a dispensing head connected to the cartridge. A sliding piston is positioned in the internal space of the cartridge, the piston divides the internal space into a product chamber and a pressurized gas chamber that have a gas-tight seal between them. A plug is fitted into the pressurized gas chamber end of the cartridge and a valve to the product chamber end, the valve has a valve house, a valve stem, and a disc spring with plate segments. The valve stem has a discharge opening at the end coming out of the cartridge, the end in the product chamber of the cartridge has a conical surface, the plate segments of the disc spring are pushed up against the conical surface of the valve stem, while the disc spring is snapped onto the valve house.

Abstract: A packaging unit has a cartridge for storing material and pressurized gas operating with it and a dispensing head connected to the cartridge. A sliding piston is positioned in the internal space of the cartridge, the piston divides the internal space into a product chamber and a pressurized gas chamber that have a gas-tight seal between them. A plug is fitted into the pressurized gas chamber end of the cartridge and a valve to the product chamber end, the valve has a valve house, a valve stem, and a disc spring with plate segments. The valve stem has a discharge opening at the end coming out of the cartridge, the end in the product chamber of the cartridge has a conical surface, the plate segments of the disc spring are pushed up against the conical surface of the valve stem, while the disc spring is snapped onto the valve house.

Abstract: The invention relates to an apparatus for and a method of spreading gaseous, liquid and powdered materials, that are applicable to pressing out creamy or foamy materials, too. According to the method a material to be spread is placed in a tank into the pressure vessel, overpressure is developed in the pressure vessel for spreading, whereby the tank moves towards the spreading nozzle and the spreading nozzle is communicated with the interior of the tank. The apparatus comprises a pressure vessel with its interior space divided into two sections, one of them contains the fuel tank ensuring the overpressure, the other one contains the material tank sealing airtightly the first section. The invention provides reliable spreading, not polluting the environment, the pressure vessel of the apparatus is not to be thrown away, and the tanks inside the vessel are replaceable.

Abstract: A spraying gun for atomizing, i.e. spraying substances in the liquid state having a closure head for cartridges filled with a compressed gas, and a gun head including a liquid atomizer, a regulating valve and members for operating the valve, the gun having a tubular body formed as a container, which is divided into a gas space and a liquid space by a freely movable member which may be a piston, an elastic spherical member that is filled with a gas under overpressure, or a foil pouch closed at both ends. Various optional features are also disclosed.