Piezo bending transducer drop-on demand print head and method of actuating it

A method of actuating a piezo bending transducer drop-on-demand print head, the print head having a nozzle plate with a plurality of nozzles arranged in series, respectively assigned to which there is a piezo bending transducer of a series of piezo bending transducers wherein each of the piezo bending transducers is subjected to a sequence, corresponding to the desired print image, of triggering pulses each effecting a drop discharge movement and, assigned to each triggering pulse, each piezo bending transducer neighboring the piezo bending transducer triggered subjected to said pulse is subjected to a closing control pulse, by which the neighboring piezo bending transducer is deflected toward the nozzle assigned to it and is held there for a period wherein the triggering pulse has an amplitude and the neighboring piezo bending transducers are subjected to a closing control pulse of an amplitude which is no more than about one sixth of the amplitude of the triggering pulse.

A piezo bending transducer drop-on-demand print head, comprising

• a nozzle plate with a plurality of nozzles arranged in series;
• a plurality of piezo bending transducers wherein each of said plurality of said transducers is respectively assigned to each of said plurality of nozzles, said transducer being subjected to a triggering pulse accompanied by a drop being discharged from the respective nozzle, and a control device by which each of the plurality of piezo bending transducers is subjected to a triggering pulse having an amplitude and each transducer neighboring said triggered transducer is subjected to a closing control pulse having an amplitude, said control pulse amplitude being no more than one sixth of the triggering pulse amplitude.

A method of actuating a piezo bending transducer drop-on-demand print head, the print head having a nozzle plate with a plurality of nozzles arranged in series, wherein each of a series of piezo bending transducers is respectively assigned to each of said plurality of nozzles, comprising:

• subjecting each of the piezo bending transducers to a sequence, corresponding to the desired print image, of triggering pulses each effecting a drop discharge movement;
• and, assigned to each triggering pulse, each piezo bending transducer neighboring the piezo bending transducer triggered by the triggering pulse being subjected to a compensating pulse deflecting it wherein each of the neighboring piezo bending transducers is subjected to a compensating pulse by which the neighboring piezo bending transducer is initially deflected in an opposite direction from that of the triggered piezo bending transducer.

A piezo bending transducer drop-on-demand print head, comprising:

• a nozzle plate with a plurality of nozzles arranged in series;
• a plurality of piezo bending transducer respectively assigned to each of said plurality of nozzles, wherein one or more of said transducers can be subjected to a triggering pulse accompanied by a drop being discharged from the respective nozzle pursuant to a sequence to form a desired print image;
• a control device for subjecting each of the piezo bending transducers to a triggering pulse to effect a drop discharge movement and subjecting each piezo bending transducer neighboring each triggered piezo bending transducer to a compensating pulse wherein each of the neighboring piezo bending transducers is subjected to a compensating pulse by which the neighboring piezo bending transducer is initially deflected in an opposite direction from that of the triggered piezo bending transducer.

A piezo bending transducer drop-on-demand print head, comprising

• a nozzle plate with a plurality of nozzles arranged in series;
• a plurality of piezo bending transducers wherein each of said plurality of said transducers is respectively assigned to each of said plurality of nozzles, said transducer being subjected to a triggering pulse accompanied by a drop being discharged from the respective nozzle, and a control device by which each of the plurality of piezo bending transducers is subjected to a triggering pulse and each transducer neighboring said triggered transducer is subjected to a closing control pulse wherein the triggering pulse has an amplitude and the neighboring piezo bending transducers are subjected to a closing control pulse of an amplitude which is no more than about one sixth of the amplitude of the triggering pulse.