The ornamental design for a head for a dual-cartridge dispenser, as shown and described.
FIG. 1 is a perspective view of a head for a dual-cartridge dispenser showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a rear perspective view thereof; and,
FIG. 9 is an operational perspective view thereof showing that the head for a dual-cartridge dispenser is mounted on a front end of the dual-cartridge dispenser.
The portions of the head for a dual-cartridge dispenser depicted in broken line form, form no part of the claimed design. The broken line showing of the dual-cartridge dispenser in FIG. 9 is provided for purposes of environment and forms no part of the claimed design.