Abstract: A ribbon tension control means comprising a frictional drag means in frictional contact with the side surface of the ribbon. The frictional drag means is positioned at a location along the path of travel of the ribbon after the ribbon departs from the supply spool. The ribbon tension control means includes guide means for maintaining a substantially constant angle of contact between the frictional drag means and the side surface of the ribbon.

Abstract: A ribbon drive device comprising a drive roller cooperating with a floating-type idler ring or roller pivoting and rotating about a support post to provide a nip therebetween through which the ribbon is moved upon rotation of the drive roller. The ribbon passes around the floating-type idler ring, through the nip and around the drive roller. The force on and the tension in the ribbon pulls and pivots the floating idler ring into a wedging position between the support post and the cooperating portion of the drive roller, with the ribbon pinched therebetween.