Bag having an improved heat seal closure and associated methods

US7544403B2 · kind B2 · utility

Assignee

• Exopack LLC · US

Inventors

• Mark Hartzell · Brown Deer, US
• Alfred A. McLellan · Inman, US
• Sarajane Johnson · Simpsonville, US
• Roseann Woodham-Grant · Greenville, US
• Lesley M. Millslagle · Roebuck, US
• Mary K. Cash · Wellford, US

Key dates

• Filing date: Nov 3, 2005
• Grant date: Jun 9, 2009
• Expiry date: Nov 22, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1334
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A multiwall bag having a slider zipper and fin combination and methods of forming same are provided. The multiwall bag, for example, can include a tube body. A bag seal zone can be formed in the tube body, and a combination fin member, zipper track, and zipper block can be connected to an end of the tube body in the bag seal zone. The other end of the tube body can be filled with product so that the bag seal zone operates as a constructive bottom during filling. Then, the end of the tube body through which product is filled can be closed and sealed to provide a bag filled with product. The method can include forming a tube body, sealing inner surfaces of the tube body to define a bag seal zone, and connecting a combination fin member, zipper track, and zipper block to the bag seal zone.