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(11) | EP 0 931 470 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Sandwich-type footwear stiffening element of rigid or at least semi-rigid behaviour, usable as part of the sole unit or insole |
(57) For a lower part (4) of footwear (2, 3), an element of rigid or semi-rigid behaviour
suitable for use as the sole unit or as an insole or internal foot support for the
footwear, this latter comprising a vamp (7) associated with the lower portion (4)
of the footwear. Said element (1) comprises at least three mutually associated layer
portions (13, 14, 15) defining a sandwich structure (1A); the outer portions (13,
14) having greater rigidity than the inner portion (15), these portions being stably
joined together to form a single body (1A). |