Patent ID: 6905184
Filing Date: 2005-06-14
Classification: B41J

Abstract:
1. A liquid jetting apparatus comprising: a head member having a nozzle, a micro-vibrating unit that causes liquid in the nozzle to minutely vibrate, a micro-vibrating-controlling-signal generating unit that generates a micro-vibrating controlling signal, and a micro-vibrating controlling unit that causes the micro-vibrating unit to operate, based on the micro-vibrating controlling signal, wherein the micro-vibrating-controlling-signal generating unit is adapted to generate a micro-vibrating controlling signal as a signal in which a unit waveform is repeated at a second frequency, the unit waveform including in order a first waveform part in which a pulse waveform appears at a first frequency and a second waveform part in which no pulse waveform appears, and the second frequency is not less than 100 Hz; wherein when a ratio of a continuing time of the first waveform part with respect to a continuing time of the unit waveform is represented by r, a product of the first frequency and r is not less than 10.8 kHz and not more than 25.0 kHz.