Abstract: A two-tier heat transfer system and method for its use includes a first cooking medium delivery system which is controlled by a measured state of a commercial oven's cook chamber relative to a predetermined set point and a second cooking medium delivery system which is not controlled by the measured state or set point. Each delivery system can deliver a same or different cooking medium than the other, at the same or different performance characteristics, and in a different type of flow pattern.

Abstract: A transfer mechanism for use in a continuous cooking system includes a non-metallic counter-balance having a contact bar located toward its uppermost end and a load located toward its lowermost end. The contact bar is sized to span a useable width of the belt and the load is sized to urge the contact bar into continued contact with a portion of the belt as the belt travels around the end roller. Means such as a rotational joint is provided for pivoting the counter-balance toward and away from belt, the joint being arranged to provide a predetermined amount of travel relative to the belt. Means such as a slot is provided for adjusting a position of the counter-balance relative to the belt. The uppermost product-contact surface of the bar can be round, flat, or angled and can include grooves to reduce the amount of contact area.

Abstract: An improved spiral oven and method for its use includes the step of using a forward/reversing fan to produce a first airflow and a second inverted airflow in the cooking chamber. The proportion of time each airflow occurs may be unbalanced within an oven residence time or cook cycle, and either airflow may begin the cycle. In addition, the fan velocity may vary so that the speed of the first airflow is different from the speed of the second airflow. A braking resistor allows the fan to quickly changeover between full-forward and full-reverse directions, while a programmable delay limits adjustments to the heat output control method until temperature variations caused by alternating between the first direction of rotation and the second direction of rotation have stabilized. Because of the reversing airflow pattern, the product cooks more evenly across the cook belt.

Abstract: A transfer mechanism for use in a continuous cooking system includes a non-metallic counter-balance having a contact bar located toward its uppermost end and a load located toward its lowermost end. The contact bar is sized to span a useable width of the belt and the load is sized to urge the contact bar into continued contact with a portion of the belt as the belt travels around the end roller. A rotational joint is provided for pivoting the counter-balance toward and away from belt, the joint being arranged to provide a predetermined amount of travel relative to the belt. A slot is provided for adjusting a position of the counter-balance relative to the belt. The uppermost product-contact surface of the bar can be round, flat, or angled and can include grooves to reduce the amount of contact area.

Abstract: An improved spiral oven and method for its use includes the step of using a forward/reversing fan to produce a first airflow and a second inverted airflow in the cooking chamber. The proportion of time each airflow occurs may be unbalanced within an oven residence time or cook cycle, and either airflow may begin the cycle. In addition, the fan velocity may vary so that the speed of the first airflow is different from the speed of the second airflow. A braking resistor allows the fan to quickly changeover between full-forward and full-reverse directions, while a programmable delay limits adjustments to the heat output control method until temperature variations caused by alternating between the first direction of rotation and the second direction of rotation have stabilized. Because of the reversing airflow pattern, the product cooks more evenly across the cook belt.