Patent ID: 7073934

Claim:
Kneading machine, comprising: a substantially cylindrical bowl, and at least two kneading tools which are rotatable within the bowl, around two axes substantially parallel to the axis of the bowl so as to define two theoretical volumes which are substantially tangent both to each other, and to the circumferential wall of the bowl, wherein each kneading tool consists essentially of: a shaft rotatably supported by a support structure of the kneading machine; a support rigidly connected to the lower end of the shaft, a single arm or blade having an upper end rigidly connected to said support, and a lower free end, said single arm or blade being radially spaced apart from the rotation axis of said shaft so that said single arm or blade extends substantially on the periphery of the respective theoretical volume, so that said single arm or blade has an orbital movement around the respective axis of rotation, wherein said single arm or blade is substantially straight at least for a portion of its length and arranged along a direction substantially parallel or slightly inclined with respect to a longitudinal axis of the respective theoretical volume, wherein said at least two kneading tools being rotatable within the bowl with the same direction of rotation, and wherein means are provided for driving rotation of the two kneading arms around their respective axes of rotation so that said arms have orbital movements around their respective axes of rotation which are synchronized with each other, so that the arms pass substantially simultaneously at the area where the respective theoretical volumes are tangent to each other, crossing each other with opposite directions of movements, due to that the two tools rotate in the same direction.