Tubular device in a bagging machine

US6524434B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Klaus Domke · Ditzingen, DE
• Herbert Stotkiewitz · Bietigheim-Bissingen, DE
• Wolfgang Bloch · Heuchelheim, DE
• Frank Kurz · Neckartenzlingen, DE
• Alexander Lutz · Neubulach, DE
• Hans Schaefer · Hanau, DE
• Helmut Rumes · Stuttgart, DE

Key dates

• Filing date: Sep 25, 2000
• Grant date: Feb 25, 2003
• Expiry date: Sep 25, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T156/1715
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A tube-forming apparatus in a bag-forming, filling, and sealing machine has a longitudinal seam heat-sealing device for connecting edge regions of the packing material belt that are placed against each other inside surface to inside surface. In order to achieve a sufficient sealing temperature in a short time, a heating body that is embodied in a lamella-like fashion protrudes like a tongue between the edge regions. In order to aid the heating body, similar heating bodies rest against the outside of the edge regions. The heating bodies have a U-shaped electric resistance wire with elongated legs which is embedded in a longitudinally folded casing made of a thin, temperature-proof woven cloth.