Microwave oven using a precoated sheet steel as walls of an...

F - Mech Eng,Light,Heat,Weapons – 24 – C

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F24C 7/02 (2006.01) H05B 6/80 (2006.01)

Patent

CA 2078391

A microwave oven having an internal chamber with walls of a precoated sheet steel which has no harmful effect on food sanitation. The precoated sheet steel is comprised of a sheet steel coated on one side with a strontium chromate primer comprising strontium chromate dispersion-mixed with a resin. A paint layer is applied over the strontium chromate primer, and a paint is applied over the other side of the sheet steel. The one side of the precoated sheet steel constitutes the exterior surfaces of the walls of the internal chamber and the other side of the precoated sheet steel constitutes the interior surfaces of the walls of the internal chamber. A molybdenum primer comprising molybdenum pigment dispersion-mixed with a resin may be applied to one or both sides of the sheet steel instead of the strontium chromate primer.

Four à micro-ondes présentant un compartiment interne dont les parois en tôle d'acier préenduite sont sans effet nocif sur l'hygiène des aliments. La tôle d'acier préenduite est, sur l'une de ses faces, enduite d'un apprêt constitué de chromate de strontium dispersé dans une résine. Une couche de peinture est appliquée sur cet apprêt, ainsi que sur l'autre face de la tôle. L'une des faces de cette tôle d'acier préenduite sert de surface extérieure aux parois du compartiment interne, alors que son autre face forme la surface intérieure des parois du compartiment interne. Un apprêt constitué d'un pigment de molybdène dispersé dans une résine peut être appliqué sur un côté ou les deux côtés de la tôle d'acier pour remplacer l'apprêt au chromate de strontium.

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