Prusa Patents a Three-Head Multitool to Repair Failed 3D Prints

Prusa Development has filed a patent application for a handheld multitool designed to repair failed 3D prints. The device packs three interchangeable heated heads into a single handle.

The extrusion head deposits molten filament, much like a 3D printing pen. The soldering head uses a conical tip to melt existing material and close cracks. The smoothing head presses a heated forming piece against the surface to even out ridges.

Each head clicks into place through a C-shaped channel. That design lets filament pass through while compensating for thermal expansion. The soldering head uses a solid metal rod instead, because soldering applies lateral pressure to the tool.

A heat break separates the hot section from the cold section on the extrusion and smoothing heads, similar to a standard 3D printer hotend. More than half of the heating element's surface stays exposed on those heads, so the component cools quickly after shutdown. The patent application says this ensures a clean end to the filament bead and faster head changes.

The handle contains the filament transport mechanism, control system, and battery. A locking mechanism holds each head in place so it cannot work loose during use.

The patent, WO2026166569A1, was published on August 13, 2026. Prusa Development is part of the Prusa Group, which also includes Prusa Manufacturing and Prusa Polymers. The company has not announced a product launch or release date.