GB701657A - Apparatus for baking bread and similar food products - Google Patents

Abstract

701,657. Bakers' ovens. INFRABAKE CO., Ltd. Sept. 11, 1951, No. 21353/51. Class 51 (2). [Also in Group XI] In a bakers' oven heating of the dough in the baking chamber is effected by infra-red rays emanating from refractory bodies heated by liquid or gaseous fuel burners and also by mixing the combustion products with air and continuously circulating the mixture through the baking chamber. In the oven shown dough is baked whilst being conveyed on an endless conveyer formed by slats 4 connecting endless chains 1. Heating is effected by a series of heaters 16 arranged along the bottom of the oven immediately in front of slits 8 formed in longitudinally located ducts 7. These heaters (Fig. 4) comprise a centrally apertured refractory disc 16 with a hollow 16a formed on its upper surface a mixture of fuel and air being directed upwardly through a thimble 17, and then, by a guard 19, downwardly into the hollow, combustion taking place on issuance of the mixture from an annular burner slit 18. By means of fan 13, pipes 12a, 12, ducts 7 and slits 8 air is initially introduced into the baking chamber transversely of the tops of the heater discs 16 the mixed air and combustion products then ascending through and around the conveyer to the slots 11 in the outlet duct 10 from whence recirculation takes place. Old gaseous mixture may be discharged from outlet 14 and fresh air introduced through an inlet 15 when necessary. The invention is applicable to " batch baking and the interior of the oven may be of polished stainless steel.