Patent · US Expired

Device for the formation of a longitudinal seam of a tubular foil

US5715647A · kind A · utility

19Cited by

6References

20Claims

0Family size

Assignee

ROVEMA-Verpackungsmaschinen GmbH · DE

Inventors

Dieter Keim · Langgöns, DE
Harald Braun · Eßlingen, DE
Werner Schneider · Erbach, DE
Walter Baur · Zöblitz, DE

Key dates

Filing date	Nov 1, 1995
Grant date	Feb 10, 1998
Priority date	—
Expiry date	Nov 1, 2015

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C66/934
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In a device for the formation of the longitudinal seam of a tubular foil, a flexible foil is placed around a formatting tube by means of a formatting shoulder. The device has a transporting device for moving of the foil and the formed tubular foil. The invention provides two opposingly rotating sealing bands which are pressed against one another clamping the two longitudinal edges o the foil for welding of the longitudinal seam of the tubular foil. One of the sealing bands can be heated by means of a heating device. Both sealing bands can be heated and the device designed as a tubular bagging machine. The invention has the advantage that the deflection of the longitudinal seam from its true path is avoided.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.