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- Patents > 2009-04-02 > SECTION B PERFORMING OPERATIONS; TRANSPORTING > PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS > TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
An inkjet printer includes a substantially closed ink duct in which ink is situated. The duct is operationally connected to a piezo-element,. The piezo-element is actuated with a number of actuation signals with appropriate waveforms, generated by a first and second signal generator in order to eject ink drops from the duct nozzle. A pressure wave is generated in the duct by an actuation pulse. The pressure wave causes a deformation of a piezo-element, which generates an electric signal as a result. The waveforms of the first and second signal may be different and do not have to be directly subsequent in time.
Filed on: 2008-09-26; Application Number: 12232984