A - Human Necessities – 21 – B
Patent
A - Human Necessities
21
B
A21B 1/48 (2006.01) A21B 1/24 (2006.01) A21B 1/26 (2006.01)
Patent
CA 2140980
A conveyor oven is described having increased efficiency from enhanced flow therethrough. The oven consists of an upper plenum, a lower plenum, and a return plenum. The upper plenum is disposed above the conveyor and dispenses heated air through nozzles downwardly. The lower plenum is disposed below the conveyor and dispenses heated air upwardly. The upper and lower plenums are tapered from a maximum width of 2 1/2 inches to a minimum of no more than 15% thereof across the path of travel of the conveyor. A blower having a vertical axis of rotation is located at a midpoint between the upper plenum and the conveyor and a burner is located below the inlet between the inlet thereto and the return plenum. The outlet from the blower directs air through scrolls onto a baffle plate having rounded edges and from there into the upper and lower plenums. This scroll-like pattern with rounded edges and, in combination therewith, a similar scroll surrounding the burner tube directing air from the return plenum through the burner tube and into the fan has been found to be responsible for the improved efficiency.
Heber Albert J.
G.s. Blodgett Corporation
Smart & Biggar
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