Abstract: The electrolytic action torch (2, 12, 19, 22, 26) for the surface treatment of metals, comprises a nib (4, 11) connected with the unipolar supply of electric current (7) from an external apparatus, the other pole being connected with the metal surface being treated and a device for protecting the operator from the gases and vapors generated, and the protection device consists of a member suitable for providing the area of the nib with a flow of pressurized air (3, 5, 9, 23, 27, 29, 36). Different integrated and non-integrated embodiments of the delivery member of air in the vicinity of the nib are described.

Abstract: A machine for localized cleaning, using pickling acid or a composition/mixture of chemical elements with the effect of pickling acid, applied by mechanical feed instruments (54, 55) to the surface to be treated (5), presenting: the acid kept in a limited quantity in the work position by a cell (1; 11); the volume of this cell (7; 17) is made to match with that of the acid used, i.e. by filling it completely with acid projected on the surface to be treated; the cell having a peripheral edge (6; 23) against the aforementioned surface; the pickling acid activated by an electrode (8; 18) that activates the acid's pickling action.

Abstract: The electrolytic action torch (2, 12, 19, 22, 26) for the surface treatment of metals, comprises a nib (4, 11) connected with the unipolar supply of electric current (7) from an external apparatus, the other pole being connected with the metal surface being treated and a device for protecting the operator from the gases and vapours generated, and the protection device consists of a member suitable for providing the area of the nib with a flow of pressurized air (3, 5, 9, 23, 27, 29, 36). Different integrated and non-integrated embodiments of the delivery member of air in the vicinity of the nib are described.

Abstract: A machine for localised cleaning, using pickling acid or a composition/mixture of chemical elements with the effect of pickling acid, applied by mechanical feed instruments (54, 55) to the surface to be treated (5), presenting: the acid kept in a limited quantity in the work position by a cell (1; 11); the volume of this cell (7; 17) is made to match with that of the acid used, i.e. by filling it completely with acid projected on the surface to be treated; the cell having a peripheral edge (6; 23) against the aforementioned surface; the pickling acid activated by an electrode (8; 18) that activates the acid's pickling action.

Abstract: A shoe cleaning machine is provided with one group of brushes (11) comprising at least one brush (11) with bristles aligned in a certain direction (11a) and at least a second brush (11b) with bristles aligned perpendicular to those of the preceding brush. A pan (13) for collecting dirt is positioned under the group of brushes and at least one nozzle (11c) sprays water on the group. An operator arm (8) carries at least one last (4) to which a shoe to be cleaned is tied: the arm has a linear actuator (9) with certain positions of extension, and is also intermediate to, a rotary actuator (10) which rotates the arm with respect to the frame (1) of the machine, to move the said lasts from the loading station (3) to the group of brushes and on to the discharge (16).