| 摘要 |
Apparatus for forming a permanent crease in fabric includes a work table and cooperating guide frame assembly for feeding flat lengths of fabric to a double needle sewing machine in a perfectly straight line with a longitudinal ripple of selected height at the desired crease location so that parallel rows of chain stitches inserted on opposite sides of the ripple draw the sides of the ripple together into a stitched fold forming a permanent crease.
|
