The ornamental design for a printer, as shown and described.
FIG. 1 is a perspective view of a printer;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left-side elevational view thereof;
FIG. 5 is a right-side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a detail view of the portion encircled as “8” in FIG. 5.
The evenly close-spaced broken lines depict unclaimed parts of the printer and form no part of the claimed design. The evenly wide-spaced broken lines in FIG. 5 indicate a detail view for FIG. 8 and form no part of the claimed design. The dot-dash chain lines depict a boundary of the claimed subject matter and form no part of the claimed design.