Patent ID: 7800023
Filing Date: 2010-09-21
Classification: A21B

Abstract:
1. An oven comprising: a cavity having a top, a bottom, a first opening and a second opening; a first, electrically-powered burner which provides infrared energy; a second, gas-fired burner, which provides infrared energy across a spectrum of different infrared wavelengths the gas-fired burner comprised of: a conveyor that extends between the first opening and the second opening and which is between the first burner and the second burner; a gas valve, coupled between a gas source and the gas-fired burner; and a controller, operatively coupled to the gas valve, the controller being configured to control gas flow through the gas valve in order to cycle the burner plate screen temperature within a range of temperatures, the burner plate screen emitting correspondingly different maximum infrared energy intensities within the range of temperatures, the controllably cycled temperature of the burner plate thereby sweeping a food item with a continuously varying spectrum of infrared energy having maximum infrared energy intensities at wavelengths that are between about 1.0 and about 4.5 micrometers.