Method and system for converting a toner cartridge printer to a metallic or light toner printer. The method may comprise the steps: providing a printer having one or more toner cartridges; removing at least one of the one or more toner cartridges; disassembling the one or more removed toner cartridges; cleaning the one or more removed toner cartridges; filling the one or more removed toner cartridges with a white, clear, metallic or light toner; and installing the one or more removed white, clear, metallic or light toner cartridges into the printer.

A repair system that includes a handheld device comprising a first extruder tip having an interior passageway extending between an inlet and a tip outlet, wherein the inlet is configured to receive a solid thermoplastic material and the tip outlet is configured to dispense a fluidic thermoplastic material; a nozzle surrounding the first extruder tip to form an annulus between an interior surface of the nozzle and an exterior surface of the first extruder tip; and a heater that is configured to heat the interior passageway of the first extruder tip such that the solid thermoplastic material becomes the fluidic thermoplastic material. In some embodiments, the repair system also includes a gas source in fluid communication with the annulus such that a skirt-shaped curtain of gas extends from the annulus and in a direction towards the tip outlet of the extruder tip.

A regulator has a regulation unit (422, 622) with an adjustment unit (624), having a drive unit (414, 620) configured for adjusting the adjustment unit (624), and having a lockable and unlockable force store (412, 610-616). The regulation unit (422, 622) and the adjustment unit (624) are in contact with one another via the force store (412, 610-616), and the regulation unit (422, 622) can, in the case of a locked and charged force store (412, 610-616), be displaced by the adjustment unit (624) within an adjustment range (630) so as to drive the force store (412, 610-616). In the event of unlocking the charged force store (412, 610), a discharge of the force store (412, 610-616) causes the regulation unit (422, 622) to be moved automatically into a safety position independently of the adjustment unit (624).