Abstract: A print head device for delivering ink to a sheet of paper or the like including a body member provided with side portions and a head surface, the head surface being disposed at an angle with respect to the side portions, an ink reservoir with an ink inlet communicating therewith, at least one ink distribution chamber communicating with the ink inlet, the body member containing a plurality of ink passages, a nozzle plate containing a plurality of substantially parallel ink delivery nozzles extending in a line from one side of the body member, the body member being provided with a plurality of ink passages extending between said ink distribution chamber and the ink delivery nozzles along both sides of the body member, a propulsion device operatively associated with said ink passages on both sides of said head surface for selectively propelling ink through the ink passages to the ink delivery nozzles, wherein the ink passages disposed at the associated sides of the body member extend parallel to each other over

Abstract: A device for exposing an edge zone of a photoconductive element to light comprising a light source and a moveable screen by means of which the width of the edge zone that is exposed to light can be adjusted. The light source is fixed to the moveable screen and is moveable therewith. Preferably, the screen consists of a pivotable housing in which the light source is mounted in an area defined by two planes which intersect along the bottom edge of the innermost side wall of the housing and form an angle of 15.degree. such that the plane through the pivot line of the housing and the bottom edge of the innermost side wall of the housing bisects the 15.degree. angle.