| 摘要 |
<p>A thermal ink jet printer (10) for printing an image (20) on a receiver (30) and method of assembling the printer. The printer comprises a print head (60) defining a first chamber (180) and a second chamber (190) therein. The first chamber contains a working fluid and the second chamber contains an ink body. A flexible membrane (200,287,300) separates the first chamber and the second chamber. A first transducer (240) is disposed in the first chamber and is in communication with the working fluid for inducing a first pressure wave (245) in the working fluid that in turn flexes the membrane into the second chamber. When the membrane flexes into the second chamber, the membrane transmits the first pressure wave into the second chamber, so as to pressurizes the ink body. When the ink body is pressurized, an ink drop is ejected from the second chamber through an outlet (195) that is in communication with the second chamber. A second transducer is disposed in the first chamber and is in communication with the working fluid for inducing a second pressure wave (275) that flexes the membrane into the second chamber. When the membrane flexes into the second chamber, the membrane transmits the second pressure wave into the second chamber to damp the first pressure wave transmitted into the second chamber, as well as to damp the first pressure wave in the first chamber. Use of the invention increases printer speed, reduces the "decel" effect, reduces resistor kogation, reduces resistor cavitation damage, and allows use of a wider variety of inks. <IMAGE></p> |
