Importance

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Abstract

A knife wheel assembly suitable for forming a butt splice to join together a web from a new roll of material to a web which is from an expiring roll of material and which is being run, downstream from the expiring roll, under tension along a predetermined path of travel that includes a running web storage means and a press or other web handling means. To form the butt splice, the leading end of the new web is trimmed by moving one knife wheel assembly along the cutting edge of an anvil. The trimmed leading end is held against the anvil, and a piece of tape is applied to the leading end so that a portion of the tape projects downstream from that end. The portion of the expiring web, adjacent to the anvil, is then momentarily stopped, held against the anvil, and trimmed by another knife wheel assembly, along the same cutting edge of the anvil, by movement of the knife wheel assembly across the web, from side-to-side, along the cutting edge of the anvil. As the trailing end of the expiring roll is trimmed, the knife wheel assembly also simultaneously adheres the trailing end to the downstream portion of the tape. This serves to join this trailing end of the expiring roll and the leading end of the new roll together. Only the portion of the web of the expiring roll adjacent to the anvil is momentarily stopped while the expiring web is trimmed and adhered to the leading end of the new roll.

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First Claim