Arrangement for axial feed of a supply hose

An arrangement for the axial driving of a supply hose, comprising:

• the supply hose being connected to a displaceable cartridge provided with a spray nozzle, the supply hose being in fluid communication with the spray nozzle,
• the cartridge being arranged in a stationary guide tube extending along an object to be sprayed, the cartridge being movable along the guide tube, the spray nozzle being movable along and relative to the guide tube,
• a first, second and third driving wheel, where at least one driving wheel is driven by driving means for driving the driving wheel,
• the first driving wheel having a first and second outside, the second driving wheel having a first and second outside, the third driving wheel having a first and second outside, the first outside of the first driving wheel being in contact with the second outside of the third driving wheel, the second outside of the first driving wheel being in contact with the first outside of the second driving wheel, the second outside of the second driving wheel being in contact with the first outside of the third driving wheel to enclose the supply hose disposed therein,
• each driving wheel having a concave jacket surface congruent with an outside of the supply hose, and
• each concave jacket surface surrounding at least 100° of a circumference of the supply hose.