Abstract: A liquid jet recorder having a capillary tube with one end connected by a filter to a liquid pump and the other end formed in a nozzle for directing a recording jet of liquid onto a recording carrier, an electromagnet having a core and winding and a permanent magnet carried by the capillary tube and arranged in an air gap of the electromagnet characterized by the core of the electromagnet comprising an inner tube having the winding arranged thereon with the inner tube and winding coaxially surrounding the capillary tube. Preferably, the electromagnet includes an outer tube having an extension and the inner tube has an extension which forms the poles of the electromagnet and includes a centering sleeve of non-magnetizable material arranged between the inner and outer tube to determine the air gap between the two extensions.

Abstract: A recorder operating with drops of liquid for point-by-point recording of analog curves or alphanumerical characters and of images. Nozzles are arranged in rows for producing the individual points. In front of inlet openings of the nozzles, contacted piezoelectric transducers are arranged so that as a result of electrical potential variation at the contact, ink is expelled from the nozzle. Recording means is located in front of the exit opening of the nozzles, and the transducers are in the form of rod-shaped elements for producing the piezoelectric movements. The transducers are arranged in the form of teeth of a comb, with the free end zone of the rods assigned to one respective inlet opening of each of the nozzles. The rods, with their free front areas, are arranged in front of the inlet openings of the nozzles so that the lengthwise axes of the rods and the lengthwise axes of the nozzles are aligned with the contact on the rods.