Grease resistant oven grille
AssigneeGeneral Electric Company
InventorMilton Edward Rickert, Jr.
Life of this patent
Estimating the term…
Abstract
A grease resistant oven grille includes an injection molded plastic structure having a plurality of air passages therethrough and a grease resistant powder coating layer overlying the plastic structure for withstanding oven exhaust of about 275° F. (135° C.) without color change. The grease resistant powder is a polyester resin that is electrostatically applied to the plastic structure after priming the grille with a conductive primer.
Claims23
A grease resistant oven grille comprising:
- an injection molded plastic structure having a plurality of air passages therethrough;
- and
- a grease resistant powder coating layer overlying said plastic structure.
An oven comprising;
- a cooking cavity;
- at least one radiant cooking unit for delivering cooking energy into said cooking cavity;
- an exhaust system for ventilating said cooking cavity;
- and
- a plastic grille in flow communication with said exhaust system for passing exhaust air therethrough, said grille comprising a powder coated surface for resisting grease stains and color effects at exhaust temperatures of about 260° F. (127° C.) to about 325° F. (163° C.).
A method for fabricating a grease resistant oven grille, the grille including a plastic structure having an exterior surface and a plurality of passages therethrough, said method comprising the steps of:
- applying a conductive primer to the exterior surface of the grille to a dry film thickness of about 0.7 mils to about 1.5 mils (17.8 μm to 38.1 μm);
- curing the primed grille at a first temperature;
- degassing the primed grille at a second temperature greater than the first temperature;
- powder coating a portion of the exterior surface of the cured primed grille with a polyester powder coating, the portion including the plurality of passages;
- powder coating an entire exterior surface of the cured primed grille with a polyester powder coating;
- and
- curing the polyester coating at a third temperature, the second temperature and the third temperature being approximately equal.
Dependencies are inferred from the claim text.