Device for moving a treatment head and a tray

A device for moving a treatment head and a tray in relation to a plane P, wherein said tray of any shape is inscribed within a rectangle of width A and length B, and includes a first driver suitable for cooperating with a first actuator so as to move the tray in translation within a plane that is parallel to said plane P in a movement zone formed from at least two perpendicular edges associated with a reference frame x, O, y, in a direction that is normally parallel to one of said axes x or y, the ratio of the area of the movement zone to area of the circumscribed rectangle of the tray being at least equal to 2, said device comprising:

• a movable arm of length R, pivotably mounted on one of its ends about an axis c that is perpendicular to said plane P, set in motion by a second actuator and comprising a treatment head at the other end, said axis c being located in the movement zone of the tray and cutting off said movement zone at point Q.