FIG. 1 is a top plan view of a cartridge according to our invention;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a side elevational view of the opposite side from that illustrated in FIG. 3;

FIG. 5 is an end elevational view thereof;

FIG. 6 is an end elevational view of the end opposite from that of FIG. 5; and,

FIG. 7 is a perspective view thereof, taken from above.