Knife wheel assembly suitable for forming a butt splice

US4892611A · kind A · utility

Assignee

• Martin Automatic, Inc. · US

Inventors

• Roger R. Wheeler · Roscoe, US
• John R. Martin · Foxborough, US

Key dates

• Filing date: Jul 18, 1988
• Grant date: Jan 9, 1990
• Expiry date: Jul 18, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T156/1326
• WIPO field: Handling
• WIPO sector: Mechanical engineering

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 leadi…