Abstract: Pre-heated mash is pelleted. The resulting warm pellets are cooled by the ambient air and the ambient air is heated by the warm pellets. The heated ambient air is used to pre-heat the mash.

Abstract: Pre-heated mash is pelleted. The resulting warm pellets are cooled by the ambient air and the ambient air is heated by the warm pellets. The heated ambient air is used to pre-heat the mash.

Abstract: An insert for use as a void space filler in a pellet mill die cavity is disclosed. Use of the insert improves die capacity and minimizes blockage.

Abstract: A shaft drive element is disclosed. The device exhibits the characteristics of maximum engagement contact area, uniform pressure throughout the contact area, variability in lockup and release characteristics as determined by the designer, minimum stress concentration in both the drive and driven element, economy of manufacture, self-centering and ease of assembly. The drive member has a cross section defined by six segments of a logarithmic spiral, three clockwise and three counterclockwise joined end to end. The female drive member having a cross section defined by six segments of the same spiral of slightly greater radius.