Patent ID: 7458716

Claim:
A particulate mixer comprising a main body that has a cylindrical drum and a particulate mixing chamber; a rotating shaft that is arranged in a horizontal direction in said particulate mixing chamber and is supported on said main body in a rotatable manner; and plural paddles that are arranged in spaced relationship along an axial direction of said rotating shaft in said mixing chamber, each said paddle has a paddle arm extended in a radial direction of said rotating shaft and a stirring blade attached to said paddle arm, wherein said drum has a center portion with at least two of said stirring blades arranged parallel to each other and oriented at a first acute angle relative to the axial direction of said rotating shaft, and a side portion connecting with said center portion, said side portion having at least one of said stirring blades arranged non-parallel to said two stirring blades in the center portion and said at least one stirring blade in the side portion being oriented at a second acute angle relative to the axial direction of said rotating shaft; said side portion has a lower face having a radius decreasing from inside to outside of said axial direction; and said paddles located in said center portion have a greater length in the radial direction than said paddle located in said side portion.