Dielectric drying kiln material handling system
AssigneeHeatWave Drying Systems Ltd.
InventorsGlenn Craig Blaker, Terry Albert Enegren, Yiu Kwan Ho, Gary Kenneth Kooznetsoff, Robert Lewis Zwick
Life of this patent
Estimating the term…
Loading patent…
AssigneeHeatWave Drying Systems Ltd.
InventorsGlenn Craig Blaker, Terry Albert Enegren, Yiu Kwan Ho, Gary Kenneth Kooznetsoff, Robert Lewis Zwick
Estimating the term…
A dielectric drying kiln material handling system includes a bottom electrode incorporating a conveyor system for moving material along said bottom electrode for moving material on and off of the electrode. Conveyors are built into the electrode in a manner so that the electrode surface of the bottom electrode, i.e. the surface contacting material to be dried is configured with gaps having dimensions so that the gaps do not significantly affect the uniformity of the power distribution over the electrode surface. Various types of conveyors may be used such as slat conveyors, roller conveyors, belt conveyors and the like provided the gaps, i.e. between the slats receiving the rollers or for accommodating the return rollers belt type conveyor are configured with dimensions so that the gaps do not significantly affect the uniformity of electromagnetic field and power distribution over the effective surface of the bottom electrode. The preferred arrangement permits computer control and includes an infeed conveyor, a electrode conveyor and an outfeed conveyor arranged in series so that material to be dried is positioned on the infeed conveyor and fed into the kiln with the feed forward of the infeed conveyor correlated with that of the electrode conveyor to deliver the material to be dried into position onto the electrode conveyor and then after drying, electrode conveyor is correlated with the outfeed conveyor to move the material from the electrode conveyor onto the outfeed conveyor. Preferably, the infeed conveyor delivers material into the kiln at the same time as the outfeed conveyor is receiving material being expelled from the kiln.
A dielectric drying kiln suitable for drying lumber and/or material requiring similar power application comprising a computer control, a bottom electrode and a top electrode each having a substantially horizontal electrode surface, means for applying power to said electrodes, said electrodes being vertically spaced to receive material to be dried therebetween and being mounted for relative movement toward and away from each other between a closed operative position wherein said electrodes contact said material over a majority of the surface area of said electrodes and an open inactive position wherein said top electrode is clear of said material, moving means for moving said electrode between said closed operative position and said open inactive position, a main conveyor overlying said bottom electrode and positioned to support and transport said material over said bottom electrode, said main conveyor having at least one moving element, said at least one movable element forming at least a major portion of said surface area of said bottom electrode, said at least one moving element operable to move said material through said kiln in a direction of travel along said bottom electrode under control of said computer control when said electrodes are in said inactive position, a grounding connection electrically connecting said at least one moveable element to said bottom electrode to ensure said at least one moveable element and said bottom electrode are at the same potential, said at least one movable element of said main conveyor forming edges of gaps in said electrode surface of said bottom electrode, said edges of said gaps being filleted with fillets having radiuses and said radius and said gaps being configured with dimensions selected so that said gaps do not significantly affect the uniformity of electromagnetic field and power distribution over said electrode surfaces of said top and bottom electrodes during the application of dielectric power to said material during drying when said electrodes are in said closed operative position and said computer control controlling operation of said kiln including said main conveyor to move said material only while said electrodes are in open inoperative position, said means for moving said electrodes, and to control application of power to said electrodes for drying said material to apply said power only when said electrode are in said closed operative position.
Dependencies are inferred from the claim text.