Jet box and a dryer using the same

Disclosed is a jet box for guiding an incoming air flow in drying of a veneer sheet. The jet box includes at least one jet nozzle. The jet nozzle includes a guide surface forming a three dimensional opening structure， which is limited at its first end to an inner opening and at its second end to an outer opening. The guide surface includes a first portion and a second portion， wherein the first portion substantially on a side of the incoming air flow is convexly curved outwards from the jet box and the second portion substantially on the opposite side of the opening structure in relation to the incoming air flow is concavely curved outwards from the jet box. Also disclosed is a dryer including at least one jet box.