Dispensing device for storing and applying at least one liquid or pasty substance

A dispensing device for storing and applying at least one liquid or pasty substance, which device comprises

• a housing;
• a dispensing nozzle attached thereto;
• at least one cartridge adapted for being lodged in the interior of said housing and having cartridge wall means adapted for enclosing contents of at least one substance therein, and a discharge outlet;
• said cartridge wall means comprising at least one cuttable cartridge wall being manufactured at least partially from cuttable material;
• said at least one cartridge being longitudinally displaceable between a rearward and a forward end position in said housing;
• a piston assembly comprising at least two pistons by said cuttable cartridge wall and having frontal faces adapted for exerting pressure on said cartridge contents and extending up to a forward end plane;
• a piston-coupling unit adapted for connecting said at least two pistons with each other for joint displacement in said housing;
• at least one cutting member being mounted behind said forward end plane of said frontal faces of said two pistons and serving for cutting through said cuttable cartridge wall between said pistons;
• guiding means for said at least one cartridge in said housing;
• at least one valve means for controlling dispensing of contents of said cartridge therefrom;
• said valve means being associated with said cartridge and said housing in a manner such that said valve means are closed in said rearward end position, and said valve means are open in said forward end position of said cartridge;
• means for displacing said at least one cartridge and said piston assembly in a forward direction;
• and
• a restoring means for returning said cartridge from said forward position to said rearward end position thereof;
• said piston assembly having slot means, associated with said pistons thereof, of a cross sectional area and configuration such that said cuttable cartridge wall can pass thereinto, and can pass therethrough after having been cut.