Description Overview Rieter open end R1 Year 1997 280 rotors Rotor 31 mm, type MD Combers OB 20B Uster clearer MK C 15 2 splicing heads Take up cones 4o20 bull nose Upgrades and Condition Rotors, rotor brakes, bearings, combers, and pneumatic cables were replaced in 2007 Machines ran only 6000 hours after upgrades