INFLATABLE DEVICE FOR SHOE UPPER CONFORMATION

摘要

inflatable device for forming shoe leather the device consists of metallic shapes (1) surrounded by the shoe leather rear part; elastic membranes (2) that are displaced against the shapes (1) by the action of cylinders (3) and scissors (4) positioned behind the elastic membranes (2) that perform the 90º fold to seat the upper on the sole of the shoe. the elastic membrane (2) is contoured superiorly by a metal band (5) and supported by lateral supports (6), being hollow and inflatable and equipped with extreme openings (21). the elastic membrane (2) has a body (22) with a substantial inverted u shape with bases provided with lateral projections (23) facing outwards which are sealed by plugs (7) provided with air inlet nozzles (8). the front surface (24) and the rear surface (25) of the membrane body (22) are flat and orthogonal so that there is no interference with the scissor blades (4) for forming the leather seat. preferably, the elastic membrane (2) has non-orthogonal internal walls (26), for better adjustment to the three-dimensional shape of the shape modeling. in this constructive option, the opening (d) of the front wall (24) of the elastic membrane (2) is smaller than the opening (d) of the rear wall (25), since it follows the ergonomic shape of the heel of the human foot.