Lechner Gmbh

Norbert Achten

Konrad B&ouml;hm

Peter Wunsch

A method for manufacturing a pressurized two-chambered container in the form of an aerosol can, in which a housing is provided with an opening that can be sealed tightly by a spray or aerosol valve. A product chamber and a propellant chamber are formed separately fluid-tight from each other by a flexible diaphragm in the housing. The product chamber can be charged with a product which can be release through said valve. The propellant chamber can be charged, on the other hand, with a compressed propellant. The product chamber communicates with the product-release opening. At least one end of a blank is left open to constitute subsequently the housing. The diaphragm is inserted into the blank through the open end, and the blank then is formed into the housing. An edge of the open end of the blank is reformed to narrow it into an integral mouthpiece that accommodates the product-release opening.

Method for producing a two chamber pressure pack and a device for carrying out the same

A method and device for producing a two chamber pressure pack comprised of an outer container ( ) and an inner sack ( ) which are glued in an edge area. After inserting the inner sack into the outer container, the edge area of the inner sack is expanded by means of a tool, said tool being guided into said area, and is pressed against the inner surface of the edge area of the outer container. Afterwards, the edge areas which are connected to one another are mutually bordered by the outer container and inner sack. A valve cover is placed on the bordering edge in a sealed manner. In order to be able to uniformly expand the edge area of the inner sack, a compressible elastic body ( ) is used as a tool, said body being arranged approximately vertical in relation to the opening plane. When the inner sack is being inserted into the outer container, the outer periphery of said body is smaller than that of the inner wall of the inner sack edge area. Subsequently, when compression is increased, the outer surface of the edge area of the inner sack is placed on and presses against the inner surface of the outer container as a result of the fact that the outer periphery of the elastic body continually increases in a radial uniform manner in such a way that the outer surface is fully pressed against the inner wall of the edge area of the inner sack, and the peripheral surface formed by the inner wall regularly increases.

Growing community of inventors

Ohringen, Germany

Norbert Achten