Ribbon loading device
Ribbon reversal mechanism for an office machine
Ribbon spool with built-in bifacial re-inker
Ribbon storage and transport mechanism
Ribbon tension control for a ribbon cartridge
Ribbon tensioning device for ribbon cartridge
Ribbon tracking system
Ribbonless endorser having a shiftable inked platen and feed rol
Right hand margin control system
Rigid cage cotton gin
Ring doffer
Ring mounting for opening rollers of spinning machines
Roll carding unit
Roll pressing device for a sliver drawing frame
Roller cleaning device having variable suction
Roller clutch with centrifugal engager
Roller culture bottle insert
Roller device for sensing and controlling unevenness of silver i
Roller drafter, process of use, and products produced thereby
Roller drive for draw frame