An oven with a box-like housing for efficient use of plant floor space encases a spiral food product carrying conveyor. A process vapor is circulated within the housing by "plug fans" with the inlet drawing vapor from the central axial zone of the spiral conveyor and exhausting into plenums along the...http://www.google.fr/patents/US5322007?utm_source=gb-gplus-shareBrevet US5322007 - Compact, high-capacity oven
