Ink-jet printing apparatus, ejection recovery method for ink-jet printing apparatus, and fabrication method of ink-jet printing head

摘要

By effectively executing ejection recovery and aging process of an ink-jet printing head having a plurality of electrothermal transducers in an ink passage, ejecting characteristics including the ejecting speed and ejecting quantity of ink are more stably kept under the printing operation for ejecting the ink by driving the electrothermal transducers. For that purpose, shift values of application timings of driving pulses to be applied to heaters in the ink passage of the ink-jet printing head are changed under the ejection recovery after the ink-jet printing head is set to a printing apparatus and/or the aging process when the ink-jet printing head is fabricated.