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A new conveyor roller, essentially characterized in that the hollow cylinder that constitutes it has two laterals drilled at its two ends at its center and in such a configuration that while the outermost side has a cylindrical extension of smaller diameter towards the outside, the lateral plus inner, has a cylindrical extension of diameter slightly greater than the diameter of the aforementioned prolongation and opposite direction to the same resulting in the formation of a cavity between both sides. (Machine-translation by Google Translate, not legally binding)
Improvements introduced in the manufacture of double structures with imbricated cheurons, particularly for filtration. (Machine-translation by Google Translate, not legally binding)