| 摘要 |
<p>PURPOSE:To provide a diffuser capable of being assembled without variance and without the membrane rubber being detached from a holder in aeration. CONSTITUTION:The upper surface of a discoid holder 1 provided with an air ejection nozzle 2 at its center is coated with a circular membrane rubber 3 having many slits to constitute a diffuser. An annular recess 5 is formed in the peripheral end face of the rubber 3, and a metallic band 4 is engaged with the recess 5. The recess 5 is aligned with the peripheral end face of the holder 1, and the clamping force of the band 4 is exerted precisely on the holder 1.</p> |
