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A hand dryer that uses "blades" of air and bacteria-killing filters is
more effective and hygienic than conventional drying machines,
its inventors claim.
Conventional hand dryers use a heater and a motorised fan to eva-
porate water from a person's hands.
The Dyson dryer uses a motor to force unheated air through two thin
slots at 640 kilometres (400 miles) per hour.
These jets form so-called "air blades" that force water off a user's
hands, as they slowly withdraw them past the blades.
"The Airblade scrapes your hands clean with a high speed sheet of
air," Dyson says: "It's a bit like a windscreen wiper."
The process also takes just 10 seconds, instead of the 30 to 40 sec-
onds needed when using a normal dryer.