The ornamental design for a printer, as shown and described.
FIG. 1 is a perspective view of a printer showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is another perspective view thereof.
The broken lines in each of FIGS. 1-5, 7, and 8 show portions of the printer that form no part of the claimed design.
The surface shading and contour lines shown in FIGS. 1-8 represent the three-dimensional character and contour of the printer, and are not intended to limit the printer to any particular material, color, or surface decoration.