We claim the ornamental design for a cartridge for medicine injector, as shown and described.
FIG. 1 is a front perspective view of a cartridge for medicine injector of the present invention showing a cap attached thereon;
FIG. 2 is a rear perspective view thereof, showing the cap attached thereon;
FIG. 3 is a front perspective view thereof, dispensing with the cap;
FIG. 4 is a front view thereof, showing the cap attached thereon;
FIG. 5 is a rear view thereof, showing the cap attached thereon;
FIG. 6 is a left side view thereof, showing the cap attached thereon;
FIG. 7 is a right side view thereof, showing the cap attached thereon;
FIG. 8 is a top view thereof, showing the cap attached thereon; and,
FIG. 9 is a bottom view thereof, showing the cap attached thereon.
The even broken lines show parts of the cartridge for medicine injector that represent unclaimed subject matter and form no part of the claimed design.