Multi-cavity dispensing refill cartridge

A refillable multi-cavity dispenser for the coextrusion of at least two flowable materials comprising:

• a reusable dispensing head comprising at least two hollow and separate parallel outer cylinders, said outer cylinders having a first generally closed end and outlet channels at said closed end;
• a reusable base unit which slidingly and telescopically accommodates said dispensing head, said base unit having piston rods;
• at least two disposable refill cartridges each comprising a hollow inner refill cylinder, each inner cylinder being telescopically and sealingly accommodated within one of said outer dispensing cylinders, each inner refill cylinder for containing one of said flowable materials, each of said inner refill cylinders having a generally open top end for providing fluid communication with one of said outlet channels, said top end of said refill cylinders comprising a flange for providing a seal between said inner refill cylinder and a corresponding one of said outer cylinders, said flange having an outer diameter greater than the diameter of said inner cylinder and providing frictional engagement to said outer cylinder, and a bottom end telescopically and slidingly accommodating a piston head which conforms to ride sealingly along the interior walls of said inner refill cylinder so as to force said flowable materials to flow toward said top end of said inner refill cylinders upon relative compression of said inner refill cylinder and piston head, said piston heads being compressibly engagable with said piston rods of said reusable base unit;
• and
• an outlet means in fluid communication with said outlet channels, said outlet means including adjacent outlet openings unconnected to each other and having means for causing said flowable material to flow toward each other at said outlet openings to form a single banded, unmixed stream of said materials outside of said outlet means.