We claim the ornamental design for a serrated male slot knife, as shown and described.
FIG. 1 is a perspective view of a serrated male slot knife embodying the present invention.
FIG. 2 is another perspective view of the serrated male slot knife of FIG. 1.
FIG. 3 is a left side view of the serrated male slot knife of FIG. 1.
FIG. 4 is a right side view of the serrated male slot knife of FIG. 1.
FIG. 5 is a top view of the serrated male slot knife of FIG. 1.
FIG. 6 is a bottom view of the serrated male slot knife of FIG. 1.
FIG. 7 is a front view of the serrated male slot knife of FIG. 1.
FIG. 8 is a rear view of the serrated male slot knife of FIG. 1; and,
FIG. 9 is an enlarged view taken along line 9-9 of FIG. 7.
The portions of the serrated male slot knife shown in broken lines illustrate environment and form no part of the claimed design. The dot-dash-dot lines visible in FIGS. 1-5, 7, and 8 define the boundary of the claimed design and form no part of the claimed design.
Movable blade not causing abrasion of fixed blade over long period of time, sheet cutting device provided with movable blade, and printer provided with sheet cutting device