| 摘要 |
<p>A liquid such as an aqueous or non aqueous photographic solution or dispersion, for example an aqueous gelatinsilver halide emulsion, is debubbled by flowing a stream into, through and out of a debubbling chamber while maintaining a pool in the chamber. Ultrasonic vibrations are transmitted to the pool by energizing an ultrasonic horn positioned within the pool, and a vacuum is pulled on the chamber to assist gas disengagement and removal. In one modification the metering liquid flows down the interior walls of the chamber as a thin film which is subjected to ultrasonic vibration by external transducers. The apparatus comprises a closed container, an ultrasonic horn projecting up form the bottom in position to be immersed in the pool, and vacuum forming means connected to the container above the surface of the liquid pool. The horn's free end surface can be smooth, or can have projections or holes for energy concentration. The horn can have one, two or more antinodes within the container, and can have lateral projections at any antinode other than at the end. Means are provided for sensing the pool level and controlling the inflow of liquid to hold the level constant.</p> |
