Airflow Cleaning Principle
topic
The former Platt Company's Air-stream-cleaner used a sharp diversion (>90°) of the airstream in a duct. Light cotton tufts follow the direction change while heavier foreign particles fly straight into the waste chamber due to their higher mass-to-volume ratio. This is an extremely gentle cleaning technique but requires foreign matter substantially heavier than the fibres.
Role
Although no longer applicable because modern cotton impurities are too small and light, the airflow cleaning principle illustrates an ideal of gentle cleaning that continues to influence machine design philosophy. It demonstrates the physical limitation that cleaning requires a density or size differential between fibres and contaminants.
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