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Pinch Rolls for Ribbon Spooling

IP.com Disclosure Number: IPCOM000047404D
Original Publication Date: 1983-Nov-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Smith, JA: AUTHOR

Abstract

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.

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Pinch Rolls for Ribbon Spooling

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. The rollers are journaled in bearings 10A and 10B, and roller 7A is driven by a drive gear 11. Ribbon 1 is centered on center sections 9A and 9B. The ribbon may be a one-quarter-inch wide ribbon having a substrate of permanently deformable material, such as polyethylene. During normal ribbon feed, whether continuous or incremental, ribbon 1 is drawn by the closed rolls 7A and 7B and the center part of ribbon 1 is stretched by the enlarged center section 9B. Fig. 2 shows a cross section of ribbon 1 after it is permanently deformed by that stretching. The rounded shape directs one layer uniformly on the preceding one during spooling. The action is similar to that of a belt on a c...