The ornamental design for a printer, as shown and described.
FIG. 1 is a top, front, left-side perspective view of a printer in accordance with our new design;
FIG. 2 is a front elevational view of the printer shown in FIG. 1;
FIG. 3 is a rear elevational view of the printer shown in FIG. 1;
FIG. 4 is a left-side elevational view of the printer shown in FIG. 1;
FIG. 5 is a right-side elevational view of the printer shown in FIG. 1;
FIG. 6 is a top plan view of the printer in FIG. 1; and,
FIG. 7 is a bottom plan view of the printer shown in FIG. 1.
The stippling represents a contrast in color between the stippled areas having a first color and the non-stippled areas having a second color which is different than the first color. The stippling forms no part of the claimed design. The broken lines shown in the drawings depict environmental subject matter and form no part of the claimed design.