Pinch Rolls for Ribbon Spooling
Original Publication Date: 1983-Nov-01
Included in the Prior Art Database: 2005-Feb-07
Film ribbon tends to move up and down from center (fail to track) while being wound onto a spool. Often guides, such as flanges on both ends of a spool hub, are used to provide tracking. The formed pinch rolls shown in Fig. 1 permanently deform a typewriter ribbon at a location past the printing location. Tracking is improved by the bowed configuration, and the ribbon will wind into a uniform cylinder without special guides. Fig. 1 shows the rollers open to receive the ribbon 1 and closed to grasp the ribbon during ribbon feed. The top sections 3A and 3B and bottom sections 5A and 5B of the opposed rollers 7A and 7B are serrated to positively hold the ribbon. Center section 9A on roller 7A is inset, and center section 9B on the opposed roller 7B is enlarged.