| 摘要 |
A sewing machine with a pair of feed wheels which clamp a workpiece therebetween to transport the workpiece, the sewing machine comprising first and second feed shafts each of which have a clutch portion at an end thereof in opposition to each other and a group of gears disposed between these feed shafts for rotating the second shaft in the direction reverse to the rotational direction of the first shaft. The direction of transportation of the workpiece is changed by means of a clutch having a portion which selectively contacts the clutch portion of either the first or second feed wheel.
|
