Improvements introduced in the machines to soften and stretch the leather for the process of leathers, tanned and skins, with a rotating cylinder equipped with blades or blades to soften and stretch or abrasive stones supported on the frame of the machine, and a fixing support for the parts to be processed, vertically adjustable by means of a lifting device provided with a working cylinder and in which the part to be processed can be clamped with the aid of a clamping device, and also with a clamping device for pressing against the the workpiece cylinder, characterized in that the lifting device (150) consists of a metallic profile frame (158), which is supported on two substantially vertical beams (152) and arranged at a certain distance from each other, being able to be moved by rollers (154, 156) in vertical direction and being joined with one of the ends (184) of the working cylinder (182), the other end of which is fixed in the frame of the machine (12, 14), and also because another frame (164), which supports the fixing support for the parts to be processed, is supported in the metallic profile frame (158), vertically movable. By rollers (166, 168), and because in this frame 164) the end (176) is fixed by at least one chain (174), or by a cable, which from this end (176), is led towards above, passing at least one pulley fixed (172) rotatably in the profiled frame (158), and then continuing downwards, while its other end (180) is anchored in the frame of the machine. (Machine-translation by Google Translate, not legally binding)
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