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.

Tape dispensers with an improved wetting system are disclosed. The tape dispensers include a holder for a roll of liquid-activatable tape, a wetting system that has a reservoir of liquid and a roller having an absorbable outer surface to absorb and dispense liquid, and a manually operated feeding mechanism. The roller is at least partially immersed in the reservoir of liquid and the wetting system includes a roller adjustment mechanism to simultaneously adjust an upward force applied by the roller to the liquid activated tape and an immersion depth of the roller into the reservoir of liquid. The wetting system may also include a pressure mechanism to adjust a downward force applied to the liquid activated tape as it passes over the roller.