Abstract: An ink jet nozzle head including a channel plate defining a linear array of equidistanced nozzles and a plurality of substantially parallel ink channels communicating with an associated nozzle, a vibration plate disposed on the channel plate, a plurality of separately disposed block members, each containing a comb-like array of fingers which extend toward and engage the vibration plate, some fingers functioning as actuators for exerting mechanical pressure on ink contained in the ink channels, which in turn expels ink droplets from the nozzles, at least one actuator being provided for each nozzle, and the other fingers serving as support members, backing means mechanically interconnecting the actuators and support members, the support members supporting the channel plate and the backing means against the reaction forces of the actuators, the backing means comprising a separate backing member disposed over said array of fingers and being more flexible in the transverse direction of the ink channels than in the

Abstract: An ink jet device including an ink reservoir and a filter element made of a sheet-like material having a curved shape and sealingly disposed in a port of the ink reservoir, wherein the filter element is inserted in the port in an elastically deformed state and is held in engagement with the walls of this port by its elastic restoration forces.

Abstract: An ink jet nozzle head including a channel plate defining a linear array of equidistanced nozzles and a plurality of substantially parallel ink channels communicating with an associated nozzle, a vibration plate disposed on the channel plate, a plurality of separately disposed block members, each containing a comb-like array of fingers which extend toward and engage the vibration plate, some fingers functioning as actuators for exerting mechanical pressure on ink contained in the ink channels which in turn expels ink droplets from the nozzle, at least one actuator being provided for each nozzle, and other fingers serving as support members for supporting the actuators at the vibration plate, where the reaction forces of the actuators are received, wherein each block comprises at least one actuator and at least one support member.