improved device for the advancement of skin flap in a car for the sewing of the same

摘要

The device for the infeed of flaps of leather in a machine for sewing the same, consists of two feed plates moved in a cyclic phase, inside holes 11, 12 made in a plate 10, in order to effect the partial protrusion of the plates 13, 14 from the holes 11, 12 and their engagement with the corresponding surfaces of the flaps 1, 2, resting on the plate 10 and below stopping means 20, the infeed of the flaps 1, 2, the disengagement of the feed plates 13, 14 from the flaps 1, 2 and the return to the original position of the feed plates 13, 14. The first plate is integral with a supporting element 9 and the second plate 14 is linked to the element 9, with the possibility of sliding axially. The sewing of said flaps 1,2 along a curved trajectory is performed because of the progressive slowing down of the mobile plate 14 occurring during the infeed movement of the plates 13, 14 and as a consequence of a counteraction to the infeed of the flap 1, whereas the return to the original position of the plate 14, is the result of the reaction of elastic means 18, during the movement of the plates 13, 14 to their starting position.