Driving method and system for controlling a tubular-bag machine

US4885900A · kind A · utility

Assignee

• ROVEMA-Verpackungsmaschinen GmbH · DE

Inventors

• Herbert Lohr · Reiskirchen, DE
• Bernd Stein · San Diego, US
• Helmut Becker · Limeshain, DE
• Reiner Ade
• Walter Baur · Zöblitz, DE

Key dates

• Filing date: May 11, 1988
• Grant date: Dec 12, 1989
• Expiry date: May 11, 2008

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C66/1122
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A driving method and system for controlling the operating characteristics of a tubular-bag machine, in which a tubular bag is closed off at the bottom end so as to be fillable with packing material through a fill pipe. An intermittently moved thin foil tube is for this purpose guided vertically between transversely arranged, heated sealing jaws, the opening and closing of which being camcontrolled. The foil movement is adjusted to the opening and closing movement. The drive for effecting the foil movement and the drive for effecting the sealing, separating and welding device are driven by separate motors controlled independently from one another, and are adjusted to one another such that each angular-speed stage can be adjusted independently from the preceding or following stage to the demands of the work cycle at any time during the work cycle. The magnitude of the angular speed can be adjusted as well.