The ornamental design for a typewriter, as shown and described.
FIG. 1 is a front, top and right side perspective view of a typewriter,
showing our new design, with the platen cover pivoted to raised position
and the detachable paper sheet guide in place;
FIG. 2 is a rear, bottom and left side perspective view thereof;
FIG. 3 is a front, top and right side perspective view thereof in closed
position;
FIG. 4 is a rear, bottom and left side perspective view thereof with the
paper guide support in raised position and with the paper guide detached
therefrom.