Method of producing overpressure valve for packaging containers

US5445870A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Norbert Buchner · Winnenden, DE
• Klaus Domke · Ditzingen, DE
• Manfred Reichert · Winnenden, DE
• Herbert Stotkiewitz · Bietigheim-Bissingen, DE
• Bernd Wilke · Leutenbach, DE

Key dates

• Filing date: Aug 24, 1994
• Grant date: Aug 29, 1995
• Expiry date: Aug 24, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24959
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A method of producing overpressure valves for packaging containers supplied in a roll, transported in this form to a packaging machine, separated at the machine and attached to packaging containers by means of an adhesive coated surface. For this purpose the overpressure valves have a layer of emulsion bonding on their underside. To prevent individual layers of the roll from sticking together, the overpressure valves have an adhesive-repelling layer on their top side. The overpressure valves are connected to one another in one piece and in a row, and are separated consecutively in a packaging machine.