| 摘要 |
Transport device for sewing machines equipped with barrel shuttles and intended for sewing using coarse yarn, which provides a first foot (7) and a second foot (25) which are both controlled according to alternating raising and lowering movements, that is to say respectively for the pressure holding and for the corresponding release of the material being processed. Moreover, the first foot is given an alternating oscillating movement out of a vertical position into an oblique position according to the run of the seam in the direction of said second foot, when the latter is in the lowered position, and out of said oblique position into said vertical position, when the foot is in the raised position. <IMAGE>
|
