Coaxial cartridge having an integrated reinforcement for dispensing a flowable multi-component composition without restoring force

A coaxial cartridge, designed to store and discharge a flowable multi-component composition, comprising:

• a hollow-cylindrical inner wall and a hollow-cylindrical outer wall arranged coaxially around said inner wall,
• an inner chamber, which is delimited radially by the inner wall, for receiving a first component of the multi-component composition;
• an outer chamber, which is arranged radially between the inner wall and the outer wall, for receiving a second component of the multi-component composition;
• a cartridge front wall, which firmly closes the inner chamber and the outer chamber on one end face of the coaxial cartridge and has one discharge opening per chamber;
• an inner piston, which closes the inner chamber at a rear and is axially movable therein, and an outer piston which closes the outer chamber at a rear and is axially movable therein;
• and
• an integrated reinforcement, embedded inside the outer wall or fastened to a surface of the outer wall, and having a plurality of rings that are overlapping or closed in a peripheral direction of the outer wall, or a plurality of spiral turns, and
• wherein the plurality of rings or the plurality of spiral turns are made of a material that is stable against tensile stresses,
• wherein the integrated reinforcement is formed in a layer or film which is fastened to an inside or outside of the outer wall of the coaxial cartridge, with an overlap in the peripheral direction;
• and
• wherein the plurality of rings, if present, each overlap in the peripheral direction by extending in the peripheral direction into overlapping portions of the layer or film that are fastened to one another, and thereby have overlapping ends,
• wherein the layer or film is glued to the outside of the outer wall of the coaxial cartridge and is designed as a label which, in addition to the integrated reinforcement, comprise predetermined identification elements for identifying or labeling the coaxial cartridge.