Greenawalt

This is an appeal from a decree of the court below adjudging that the appellee has not infringed claims 17, 20, 21, 24, 25, 26, 47, 48, and 49 of the appellant’s patent No. 1,348,407, issued August 3, 1920, on an application filed November 18, 1910, and dismissing the appellant’s bill of complaint.- The invention relates to an apparatus for desulphurizing and agglomerating or sintering pulverized ore preparatory to smelting. As described in the specifications, it consists of a box-like roasting pan to contain the ore, together with a portable igniter, consisting of a hood or cover shaped to harmonize-with the top of the roasting pan and fitting closely thereon-when lowered into position for operation. The igniting cover is equipped with spray nozzles for atomizing oü, and it is perforated to allow the entry of air necessary for purposes of combustion. Beneath the pan is a suction apparatus, whereby the flames and hot combustion products are drawn downwardly through the open bottom of the cover and into the layer of ore beneath. Say the specifications: “An important object subserved by the cover is that the igniting flames, in response to the suction of the exhauster, are drawn…