SIC: 3535 THE CUSTOMER'S PRODUCT: THE REQUIREMENTS: THE HUMPHREY ENGINEERED SOLUTION: Pallets are transported on a series of parallel roller chains, which are supported by inflated air bags. Air bags in each "zone" are kept inflated by air flowing through a "normally open" valve. When a pallet is oriented the wrong way, the edge contacts a sensor arm. The arm is forced down onto the actuator plunger in the valve. This simultaneously diver

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