A system and method to control the power supplied to heating elements of a conveyor oven. The conveyor oven includes a plurality of heating elements to evenly distribute heat in an oven compartment. During peak-loads, the current draw of the heating elements may exceed available power of a power supply. Therefore, a system and method to reduce the total current draw of the plurality of heating elements is provided. The system includes a controller configured to perform the methods disclosed herein. The methods effectively lower the total current draw by rapidly cycling a plurality of relays connected to each of the plurality of heating elements to achieve even distribution of heat and reduced current draw during peak-loads.

A system and method to control the power supplied to heating elements of a conveyor oven. The conveyor oven includes a plurality of heating elements to evenly distribute heat in an oven compartment. During peak-loads, the current draw of the heating elements may exceed available power of a power supply. Therefore, a system and method to reduce the total current draw of the plurality of heating elements is provided. The system includes a controller configured to perform the methods disclosed herein. The methods effectively lower the total current draw by rapidly cycling a plurality of relays connected to each of the plurality of heating elements to achieve even distribution of heat and reduced current draw during peak-loads.

The heat recovery system includes an oven having a treatment air with a treatment air temperature and a treatment air dew point temperature to treat a product or product in process. A zone outlet exhaust waste treatment air following the treatment of the product. A preheating zone includes a preheating inlet for the introduction of preheating air having a preheating air temperature and a preheating air dew point temperature to preheat the product. A transfer duct extends between the zone outlet of the oven and the preheating zone to transfer a portion of waste treatment air from the oven to the preheating zone to create the preheating air to preheat additional product. The preheating air preheats the product in the preheating zone to a product temperature that is at least equal to the treatment air dew point temperature to eliminate surface condensation on the product during treatment in the oven.

The heat recovery system includes an oven having a treatment air with a treatment air temperature and a treatment air dew point temperature to treat a product or product in process. A zone outlet exhaust waste treatment air following the treatment of the product. A preheating zone includes a preheating inlet for the introduction of preheating air having a preheating air temperature and a preheating air dew point temperature to preheat the product. A transfer duct extends between the zone outlet of the oven and the preheating zone to transfer a portion of waste treatment air from the oven to the preheating zone to create the preheating air to preheat additional product. The preheating air preheats the product in the preheating zone to a product temperature that is at least equal to the treatment air dew point temperature to eliminate surface condensation on the product during treatment in the oven.

Disclosed is a mesh heating system including: two or more electrodes configured to supply a current to the wire mesh heating element; a mesh heating element comprising filaments disposed between the two or more electrodes; and a tensioner to maintain the wire mesh heating element at tension along an axis of tension as the wire mesh heating element is heated, wherein some of the filaments of the mesh heating element are disposed to intersect the axis of tension at a non-orthogonal angle.

Disclosed is a mesh heating system including: two or more electrodes configured to supply a current to the wire mesh heating element; a mesh heating element comprising filaments disposed between the two or more electrodes; and a tensioner to maintain the wire mesh heating element at tension along an axis of tension as the wire mesh heating element is heated, wherein some of the filaments of the mesh heating element are disposed to intersect the axis of tension at a non-orthogonal angle.

A gas manifold for a convection conveyor oven includes an elongated housing having a wall that at least partially encloses an interior volume; a gas inlet in fluid communication with the interior volume and extending through the wall; a plurality of gas outlets in fluid communication with the interior volume and extending through the wall; a plurality of seat inserts removably coupled with a plurality of gas outlets; a plurality of valve openings formed in the wall and aligned opposite the plurality of gas outlets; and at least one valve removably coupled to the wall and aligned with a first valve opening, wherein the valve is aligned with a first gas outlet and has a first position in which a first seat insert is not in fluid communication with the gas inlet.

A gas manifold for a convection conveyor oven includes an elongated housing having a wall that at least partially encloses an interior volume; a gas inlet in fluid communication with the interior volume and extending through the wall; a plurality of gas outlets in fluid communication with the interior volume and extending through the wall; a plurality of seat inserts removably coupled with a plurality of gas outlets; a plurality of valve openings formed in the wall and aligned opposite the plurality of gas outlets; and at least one valve removably coupled to the wall and aligned with a first valve opening, wherein the valve is aligned with a first gas outlet and has a first position in which a first seat insert is not in fluid communication with the gas inlet.

A conveyor oven including a baking case having front, longitudinal, and oppositely longitudinal walls, the baking case having longitudinal, oppositely longitudinal, and front ports wherein the front port has a longitudinal end and a rectangular periphery; a conveyor extending through the baking case; a mounting land extending along the front port's periphery; a conveyor access door fitted for covering the front port; a first pin and socket hinge operatively interconnecting the front wall and the longitudinal end of the conveyor access door, the hinge's socket having a rearward opening and further opening oppositely longitudinally; the oven further including a deformable seal positioned between the conveyor access door and the land, the seal being adapted for, upon positioning of the pin at the rearward opening, forwardly biasing the door and the pin, and forwardly seating said pin within the socket.

A conveyor oven including a baking case having front, longitudinal, and oppositely longitudinal walls, the baking case having longitudinal, oppositely longitudinal, and front ports wherein the front port has a longitudinal end and a rectangular periphery; a conveyor extending through the baking case; a mounting land extending along the front port's periphery; a conveyor access door fitted for covering the front port; a first pin and socket hinge operatively interconnecting the front wall and the longitudinal end of the conveyor access door, the hinge's socket having a rearward opening and further opening oppositely longitudinally; the oven further including a deformable seal positioned between the conveyor access door and the land, the seal being adapted for, upon positioning of the pin at the rearward opening, forwardly biasing the door and the pin, and forwardly seating said pin within the socket.