Patent ID: 7503356

Claim:
A liquid supply apparatus, comprising: a liquid vessel fixed on a base; and a liquid nozzle for supplying a liquid into the liquid vessel, being movable on X- and Y-axis coordinates to a necessary position of the liquid vessel, wherein: the liquid nozzle is attached to an arm capable of being turned reversibly around a turning shaft by which movement of the liquid nozzle is controlled by a turning angle of the arm for either one axis of the X-axis and the Y-axis; the liquid nozzle is controlled by changing a length of the arm from the turning shaft for the other axis; and the arm fitted with the liquid nozzle is guided by a guide member, wherein said liquid supply apparatus further comprises a friction drive roller which is rotatably driven by the driving unit, by which the friction drive roller and the arm are brought into friction contact with each other by pushing the friction drive roller on the arm while the friction drive roller is rotatably driven by the driving unit, and the length from the rotating shaft is changed by moving the arm by being guided by the guide member.