JT799-3-180/4-181 3 or 4 - yarn Reverse Cup Seaming Machine There is yarn covering head in front of its needle plate (the unit receiving idle yarn ring), and this unit packs idle yarn ring into
over seaming yarn and reduce knot steps, and has special release device (called mean yarn device), and releases two yarns while taking up presser foot. It is applicable to drawers and T-shirts.