Wide format print head with air injector

Head (T) printing multi-jet, wide format, wider than 1 meter, composed of several (X) devices (Mi) jet printing ink for printing on a mobile support (S), in the which: - each device comprises: - a body (1) adapted to extend along an axis (a - a ') transverse to the direction of movement (f) of the support, - an ejector (2) ink attached to body (1) and adapted to eject ink along a plane (E) ejection parallel to the axis (a - a '), - at least part (3, 33; 1, 11) defining an orifice (6 ) output through which passes at least part of the ejected ink (40) to print the moving support, - a cavity (5) delimited at least by the body (1), the ejector (2) and (s) part (s) (3, 33; 1, 11) defining the outlet, - an injector (9) air adapted to blow air with a flow approximately parallel to the plane (E) of ink ejection (4), passing through the cavity (5), from a zone below the ejector (2) to the hole (6) output; - The devices are in the form of adjacent modules (Mi) along the same transverse axis (A - A ') and each module producing several (m) jets (4) and comprising a block of electrodes (3), in which one injector (9) is common to all modules (My - Mx), the injected air flow evenly across the width of the head (T).