| 摘要 |
<p>Ink jet printing apparatus for receiving an ink cartridge (72,74,76,78) defining an orifice structure having at least one orifice plate (72a,74a,76a,78a) with a plurality of nozzles for ejecting ink droplets onto a receiver to form an image, cleaning of the orifice structure of debris is providing by at least one actuable ultrasonic transducer (81,82,83,84) operatively associated with and spaced from the nozzles; and a thin layer (meniscus) of viscous fluid (81a,82a,83a,84a) provided between and in contact with the ultrasonic transducer and the orifice plate to transmit the ultrasound energy through that fluid media. The actuable ultrasonic transducer produce ultrasonic sound waves which pass through the thin viscous fluid layer and impinge upon the orifice structure and dislodges debris. <IMAGE></p> |
