Abstract: A fluidized bed is described and which includes a multiplicity of fluidizing manifolds positioned in spaced relation one relative to the others; an enclosure positioned in gravity receiving relation relative to the multiplicity of fluidizing manifolds and which has an intake and a discharge end, and wherein particulate matter received in the fluidized bed moves under the influence of gravity from the intake end to the discharge end, and a moveable gate is mounted on the second discharge end of the enclosure and which is operable to selectively occlude a discharge aperture and which further facilitates the selective removal of particulate matter and waste material entrained with same, and which moves under the influence of gravity to the discharge end thereof.

Abstract: A fluidized bed is described and which includes a multiplicity of fluidizing manifolds positioned in spaced relation one relative to the others; an enclosure positioned in gravity receiving relation relative to the multiplicity of fluidizing manifolds and which has an intake and a discharge end, and wherein particulate matter received in the fluidized bed moves under the influence of gravity from the intake end to the discharge end, and a moveable gate is mounted on the second discharge end of the enclosure and which is operable to selectively occlude a discharge aperture and which further facilitates the selective removal of particulate matter and waste material entrained with same, and which moves under the influence of gravity to the discharge end thereof.

Abstract: A two-step method to porcelain-coat an article is provided particularly useful for porcelain-coating a gas burner used in a gas-fired residential barbecue grill. A gas burner constructed from mild enameling-grade steel is dipped in a slip containing porcelain frit and manipulated so that the slip adequately coats and adheres to the interior surfaces of the burner. The porcelain-containing slip simultaneously coats and adheres to the peripheral "shoulders" and particularly to the interior "shoulders", of the gas jet openings of the burner. A second coating of porcelain-containing powder is then applied, for example, electrostatically or by other conventional powder application techniques, to the exterior surfaces of the burner. The properties of the porcelain-containing powder of the second coating are adjusted for optimal coating properties. Then, the double coated gas burner is fired in a continuous furnace at a peak firing temperature of 1480.degree. F. to 1550.degree. F., with a target of 1530.degree. F..

Abstract: A two-step method to porcelain-coat an article is provided particularly useful for porcelain-coating a gas burner used in a gas-fired residential barbecue grill. A gas burner constructed from mild enameling-grade steel is dipped in a slip containing porcelain frit and manipulated so that the slip adequately coats and adheres to the interior surfaces of the burner. The porcelain-containing slip simultaneously coats and adheres to the peripheral "shoulders", and particularly to the interior "shoulders", of the gas jet openings of the burner. A second coating of porcelain-containing slip is then applied, for example, by spraying or other conventional wet application techniques, to the exterior surfaces of the burner. The properties, for example specific gravity, of the porcelain-containing slip of the second wet coating are adjusted for optimal coating properties. Then, the double slip-coated gas burner is fired in a continuous furnace at a peak firing temperature of 1480.degree. F. to 1550.degree. F.