| 摘要 |
PURPOSE: An air-cycling pneumatic tube is provided to obtain a system more economical and efficient and safer than a usual system and to make the use environment pleasant. CONSTITUTION: In an air-cycling pneumatic tube, two pneumatic tubes each having four-air valves are connected with an air hose by a blower. Air discharged from a blower is not exhausted but is cycled inside and then sucked into the same blower. Air discharged from a blower(1) is sucked into the same blower with passing through a valve(9), a pneumatic tube(4), a valve(12), an air hose(8), a valve(11-1), a pneumatic tube(4-1), an air valve(10-1), an air hose(5-1), an air hose(6) in order.
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