FIG. 1 is a front top perspective view of a first embodiment of a machine enclosure according to our new and ornamental design;
FIG. 2 is a rear top perspective view thereof;
FIG. 3 is a front elevation view thereof,
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a right side elevation view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is a bottom perspective view thereof;
FIG. 10 is a front top perspective view of a second embodiment of a machine enclosure according to our new and ornamental design;
FIG. 11 is a rear top perspective view thereof;
FIG. 12 is a front elevation view thereof,
FIG. 13 is a rear elevation view thereof;
FIG. 14 is a left side elevation view thereof;
FIG. 15 is a right side elevation view thereof;
FIG. 16 is a top plan view thereof;
FIG. 17 is a bottom plan view thereof; and,
FIG. 18 is a bottom perspective view thereof.
The evenly-spaced broken lines in the Figures illustrate portions of the machine enclosure that form no part of the claimed design. The dash-dot broken lines in the Figures between the solid line portions and the evenly-spaced broken line portions of the machine enclosure represent the boundaries of the claimed design and form no part of the claimed design.