Three-dimensional Printer

FIG. 1 is a top front perspective view of a three-dimensional printer showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a top front perspective view thereof, shown in an open condition.

The evenly dashed broken lines shown in the drawings depict portions of the three-dimensional printer that form no part of the claimed design. The dot-dash broken lines shown in FIGS. 1 and 8 represent a boundary around a portion of the three-dimensional printer that forms no part of the claimed design.