| 摘要 |
PCT No. PCT/GB93/00250 Sec. 371 Date Jul. 28, 1994 Sec. 102(e) Date Jul. 28, 1994 PCT Filed Feb. 5, 1993 PCT Pub. No. WO93/15911 PCT Pub. Date Aug. 19, 1993Nozzles for an ink jet printer are formed by laser ablation in a nozzle plate (24) which has previously been bonded to the body of the printer (16). The laser beam is caused to converge at a point in front of the nozzle plate (24) so that a nozzle is formed which tapers toward the outlet. First and second beam masks (72, 74) are established in front of a focussing lens with the masks being respectively conjugate in the lens with the nozzle inlet and outlet, which are of different shape. The nozzle has a central land (218) which controls the ink meniscus and avoids the ejected drop receiving a sideways kick from the nozzle wall.
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