Strand alignment devices for high speed winding of magnetic tape

摘要

Magnetic tape is wound onto a roll at high speeds. Each strand of tape wound onto the roll is precisely superimposed over the previously wound strand by alignment devices including a pre-wrap alignment roller, a packwheel, and a post-winding final alignment guide roller. The final alignment guide roller locates the edges of the strand being wound in positions which are coplanar with the edges of the previously wound strands on the outside of the roll. The tape is aligned and locked in place on the roll by a combination of air removal and alignment and re-alignment steps during air removal.