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Assembly For Uniform Tape Tension in Tape Slitter

IP.com Disclosure Number: IPCOM000052071D
Original Publication Date: 1981-Apr-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Beach, LR: AUTHOR [+2]

Abstract

In order to slit computer tape to very tight width and straightness tolerances the tape web must be pulled through the slitter blades at a uniform tension across the width of the tape web, and at a constant tension along the length of the web. In addition, the individual tape ribbons must be separated from the adjacent tape ribbons as they leave the slitter blades to keep the tape edges from rubbing against one another and thus damage the tape.

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Assembly For Uniform Tape Tension in Tape Slitter

In order to slit computer tape to very tight width and straightness tolerances the tape web must be pulled through the slitter blades at a uniform tension across the width of the tape web, and at a constant tension along the length of the web. In addition, the individual tape ribbons must be separated from the adjacent tape ribbons as they leave the slitter blades to keep the tape edges from rubbing against one another and thus damage the tape.

An improved assembly for achieving these objectives is illustrated above. A tape web 10 comes from a supply spool 12 and goes through a vacuum column
14. The vacuum column provides a uniform tension across the width of the unslit web as it moves into slitter blades 15. As the slit tape emerges from the slitter blades, all even numbered ribbons 16 are directed upward over upper air bearing 17 and all odd numbered tapes 18 are directed downward over lower air bearing
19. Thus adjacent tape ribbons are separated one from another as they leave the slitter blades, and edge damage resulting from the tape edges rubbing on one another is avoided.

Each group of slit ribbons then wrap around an air bearing 20 or 21 which is mounted on a tension sensing transducer, and from there to a urethane-covered drive capstan 24 or 25 which is driven by a DC servo motor. The signal from the upper and lower sensor assemblies is fed into a servo control system (not illustrated) which drives the up...