US Patent 9688025 3D cleaning object for multi-print-head 3D printing

This document describes techniques and apparatuses for a three-dimensional (3D) cleaning object for multi-print-head 3D printing. These techniques are capable of cleaning leftover material from an active or inactive print head using a 3D cleaning object. This cleaning object is printed along with the desired 3D object, with the cleaning object retaining leftover material that may otherwise become an undesirable artifact of the desired 3D object.