| 摘要 |
A printing apparatus including at least one ink duct provided with an electromechanical transducer, a driver circuit provided with a pulse generator and operatively associated with the transducer to energize the transducer, a measuring circuit operatively associated with the transducer for measuring an electrical signal generated by the transducer in response to energizing by the pulse generator, a device for breaking the circuits in such a manner so that when the drive circuit is open, the measuring circuit is closed, wherein measurement of the electrical signal takes place when the printing apparatus is in a printing mode.
|
