Description Machine 1 Spinning machine Zinser Model: 421E Year: 1992 640 spindles Ring diameter: 55 mm Inverter Linked to winder: Murata Link Coner 7V of 24 heads Machine 2 Spinning machine Zinser Model: 421E Year: 1993 640 spindles Ring diameter: 55 mm Inverter Linked to winder: Murata Link Coner 7V of 20 heads Machine 3 Spinning machine Zinser Model: 421E Year: 1994 640 spindles Ring diameter: 55 mm Inverter Linked to winder: Murata Link Coner 7V of 24 heads