Patent ID: 6158621
Filing Date: 2000-12-12
Classification: B05C,B65D

Abstract:
A cartridge assembly for dispensing at least one component, comprising:a rigid cartridge unit having a piston inlet end and an outlet;a package assembly including a membrane and an outlet adaptor the membrane containing liquid chemical, the membrane having a closed end and an outlet end attached to the outlet adaptor, the membrane being disposed in the cartridge unit and the outlet adaptor being mounted to the cartridge outlet, the outlet adaptor having at least one sealing element on an outer diameter thereof for sealingly engaging the cartridge outlet; anda piston assembly arranged to be slidably received in the cartridge unit and to contact the closed end of the membrane to turn outside-in wall portions of the membrane from the closed end toward the outlet end, the wall portions sliding relative to each other during emptying of the membrane, the piston assembly including a piston with a sealing element that cooperates with an inner wall of the cartridge unit at the piston inlet end of the cartridge unit to seal gaps between the sliding wall portions of the membrane.