Film tube for flowable substances

US6085941A · kind A · utility

Assignee

• Thera Patent GmbH & Co. KG · DE

Inventors

• Helmut Pauser · Dießen, DE
• Gerd Brandhorst · Landsberg, DE

Key dates

• Filing date: Feb 5, 1997
• Grant date: Jul 11, 2000
• Expiry date: Feb 5, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/15
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

In a film tube containing a flowable substance, a fold 11 is formed in the film, which fold is so shaped that it abruptly decreases the cross-section at this location of the tube. The fold 11 may be fixed by a V-shaped weld 12. When the film tube is compressed, maximum stress is exerted on the area of the film close to the apex 13 of the V-shaped weld 12, so that the tube starts to rupture and form a dispensing opening at this location.