U.S. federal trademark · Serial No. 75039883 · Reg. No. 2345838
drying units for granulated plastic material, comprising a storage container for the granulated plastic material, conduits for conveying dry air to the storage container, a heating device for the dry intake of air, return conduits for moist exhaust air from the storage container and a heat exchanger between the hot moist return air and the unheated dry intake air
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