Cartridge and piston for dispensing mass

Claim 1

A replaceable cartridge for use in a dispensing tool having a mechanism for dispensing a component mass comprising at least one component out of foil bags received in said cartridge, said cartridge comprising: an axially extending housing having open opposite ends; a plurality of juxtaposed chambers extending between said open opposite ends and having different volumes for receiving a respective plurality of component mass-containing foil bags having different sizes, said receiving chambers having respective inner surfaces defining the respective different volumes of said receiving chambers; and a plurality of pistons corresponding in number to the plurality of receiving chambers and having different cross-sections corresponding to the different volumes of the receiving chambers, each of the plurality of pistons being axially displaceable in a sliding engagement with an inner surface of a respective receiving chamber, and each of the plurality of pistons having opposite end faces extending across a respective receiving chamber and being symmetrical with respect to a cross-section of the respective chamber, whereby each of said opposite end faces can be alternatively acted upon by the dispensing mechanism of the dispensing tool for displacing the piston in the respective chamber to squeeze a component mass out of a respective foil bag.