| 摘要 |
<p>The apparatus described includes a pair of plates (10) pivotable like jaws about a common centre of rotation (C), means (16) for supporting and guiding the plates, means (21, 15, 22) for adjusting the angles of orientation of the plates, drive means (23, 23a) for moving the plates (10) and their respective support and guide means (16) from a rest position remote from the last to a working position in which the inner edges (12a) of the plates (10) interact with the vamp on the last (30). In order to adjust the orientation of the plates within a wide range independently of the movement from the rest position to the working position, the means (21, 15, 22) for adjusting the angles of orientation of the plates (10) include a motor (21) for each plate (10) and kinematic coupling members (15, 22) for coupling the motor to the respective plate. A programmable control unit is also provided for operating the motors (21) for the plates (10) and the drive means (23, 23a) independently to orient the plates at predetermined angles and to move them with their respective support and guide means through a predetermined distance. <IMAGE></p> |
