Abstract: A continuous process for preparing stabilized fat, stabilized protein meal and low fat stabilized bone for producing high quality gelatin and glue from raw organic material containing fat, soft proteinaceous tissue and high density proteinaceous material by crushing the raw material in a rough sizer and continously feeding the crushed raw material to a press to form a soft low density proteinaceous material and a major proportion of the fat. A pressed high density material is discharged from the press separately from the soft wet low density material. The fat is separated from the soft wet low density material, dried and the suspended solids therein removed to provide a stable light colored fat product. The separated pressed high density material and the wet low density material having a low fat content are heated to reduce the moisture content below about 10 wt. percent moisture and effect crisping any fat and tissue adhering to the high density material.

Abstract: A continuous process of preparing low fat stabilized bone particularly suited for producing high quality gelatin from trimmed raw bone which is preferably crushed in a pre-hogger and fed continuously to preferably a screw type press mounted within a cage having a choke and perforations in the wall of the cage through which soft non-bone material is extruded. The pressed bone which is recovered separately from the soft non-bone material has a substantially reduced content of fat and meat tissue without heating while in contact with liquid fat. The pressed bone is heated in an oven dryer to a temperature up to 250.degree. F. (121.degree. C.) which crisps the fat and meat tissue adhering to the pieces of bone so that the crisp fat and meat tissue is readily separated from the bone during the heating, tumbling and screening thereof.