| 摘要 |
Internal ventilation system that can be applied to footwear with sole made through the injection or pouring of plastic material directly onto the upper characterized by a type of upper 2, a ventilation chamber 4 composed of spongy, open-cell material isolated with non-absorbing material on its side that touches the sole, a sole 1 obtained through the injection or pouring of plastic material directly onto the upper in such way as to compose an unbroken whole with the shoe itself, a non-return valve for the expulsion of the air inside the shoe, inserted either at the side 5 or the base 5a ) of the shoe, and an insole 3 with ventilation holes 6. To greater advantage, the expulsion valve 5/5 a ) can be prepared and provided in the mould for the sole or inserted subsequently in the sole after moulding by injection or pouring with adequate housing for the valve in mind. |
