| 摘要 |
1278452 Copying by scanning MEAD CORP 9 June 1969 [18 Oct 1968] 29192/69 Heading H4F [Also in Division B6] In a high-speed printer in which characters or images are formed by a plurality of liquid ink jets in arrays 20, 22, 24, 26, Fig. 1 as a web 10 is fed through the machine, a binary code is applied electrostatically to allow a stream of drops produced by a supersonic virbator 37 to fall on the web or be diverted into a catcher unit, 45, Fig. 4. The web and the stream of drops intersect at an angle so that at the point of impact their velocities are equal. Each character is formed by 16 x 20 mosaic 70, Fig. 5. The width of each character is divided into four groups of four staggered jets which are operated twenty times to form the character or image. Time delay units enable two adjacent jets to position ink drops side-by-side when required. The printer may be controlled by a magnetic tape, core memory or computer. The apparatus may also be used to produce the same copy repeatedly. A photograph, print or film is mounted on a drum 50, Fig. 1, and light 52 is sensed by banks of photosensors 55-59 corresponding to the arrays 20-26 which deposit ink in accordance with the image sensed. The apparatus is suitable for printing on irregular surfaces, e.g. sandpaper fabric, bottles, cans &c. and the jets may use etching liquid. |
