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US 5,325,601 AGranted
Method for drying and curing a coated metal substrate
AssigneeAlltrista Corporation
InventorsDonald L. Brownewell, Louis S. Comadena, Dwight B. Raddatz
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AssigneeAlltrista Corporation
InventorsDonald L. Brownewell, Louis S. Comadena, Dwight B. Raddatz
Estimating the term…
A method and apparatus for drying and curing a coating which as been applied in liquid form to a metal substrate. The process and apparatus include a precuring or drying of the coating by rapidly heating the sheet in an electromagnetic induction coil to volatilize solvents in the coating. The precured sheets are then immediately conveyed to a conventional convection oven for further heating the sheets by baking the sheets at a temperature and for a duration in accordance with the drying and curing specifications of the coating manufacturer. The induction coil is designed to heat the sheet metal in a narrow transverse band as the sheet moves through the induction coil. The power supply to the induction circuit is designed to permit the induction coil to be turned on under varying load.
A process for drying and curing a coating on a metal substrate, comprising the steps of inductively heating a coated metal substrate to rapidly heat the coated metal substrate to a first temperature sufficient to substantially dry the coating;
A process for drying and curing a coating which has been applied in a liquid form on discrete units of metal substrate, comprising the steps of:
A process for at least partially curing a coating which has been applied to a metal sheet comprising the steps of:
A method for curing a coating which has been applied sequentially to a plurality of individual sheets of a ferromagnetic substrate comprising precuring the coating by heating the substrate to rapidly raise the temperature of the ferromagnetic substrate to a first temperature sufficient to volatilize at least 50% of the solvents contained in the coating;
Dependencies are inferred from the claim text.