| 摘要 |
A printing apparatus is disclosed which comprises a rotatable member, for example a cylinder (10) ratable about its longitudinal axis (12), drive means (16) for rotating the cylinder, means (22) for feeding liquid to the circumferential (20) surface of the cylinder to form droplets (18) of the liquid thereon, and means (32) for causing droplets to be released selectively from the cylinder (10) as it rotates. The droplets released are projected towards a substrate spaced from the cylinder, and control means are provided to monitor the rotation of the cylinder (10) and for controlling the droplet release means (32) to form a predetermined pattern of droplets on the substrate (44). The apparatus may provide a rapid supply of droplets, making it suitable for high throughout panting applications. |
