| 摘要 |
<p>The sewing machine M is designed to operate on a semifinished workpiece constituted by an open vamp (T) previously turned inside-out and glued to a sole (F), the sole (F) being provided, at a perimeter edge (22) thereof, with a step (21) and an oblique slit (23). The machine (M) comprises: a vertical support stud (13), associated to an oscillating arm (14) on which the sole (F) is rested; a spreader foot (10), solidly constrained to the head (1) of the machine (M), destined to insert partially in the slit (23), in order to distance the adjacent lip (L1, L2); an abutting foot (12), opposite the spreader foot (10), destined to laterally abut the semifinished workpiece (S), in order to establish the horizontal position thereof; a curved needle (4), made to oscillate between a retracted position (R) and an advanced position (A), in which the needle (4) is inserted between the lips (L1, L2) such as to pass, in order, through the sole (F) and the vamp (T) of the mutual gluing zone, the needle (4) being translatable perpendicularly to the relative oscillating plane, with an alternating motion, in operating runs of an extension according to a predetermined step; a rotating hook device (5), designed to cooperate with the needle (4) for realising stitches (C).</p> |
