DEVICE FOR FINE FOAMING.

摘要

A device intended for fining bubbles generated on the surface of a hollow filament yarn while imparting flowing speed to fluid in contact with the surface of the hollow filament yarn without using power of machines such as pumps. The device is provided with cylindrical bodies (1, 4 or 11) disposed in liquid stored in a vessel (8) and spaced from the bottom surface of said vessel (8) so that the open parts of said cylindrical bodies are directed upwardand downward respectively, a narrow passage (6 or 6a) formed to extend vertically between the cylindrical bodies with the both ends opened upward and downward respectively, a hollow filament yarn (3) in a fixed length inserted into said passage to be held thereby so as to be spaced from the inner surface of the passage and closed at a tip, and a pressurized gas feeding pipe (7) connected to a base end opened for feeding pressurized gas into the inside of said hollow filament yarn.