Roller assembly for expanding the width of a web

US5455992A · kind A · utility

Assignee

• Eduard Kusters Maschinefabrik GmbH & Co. KG · DE

Inventors

• Wolfgang Kurschatke · Krefeld, DE
• Axel Schneider
• Gunter Von Harten · Kaarst, DE
• Christian Meyer · Karlsruhe, DE
• Klaus Kadagies · Krefeld, DE

Key dates

• Filing date: Apr 26, 1994
• Grant date: Oct 10, 1995
• Expiry date: Apr 26, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C55/18
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A widening device for increasing the width of a moving web of material comprises a rotatable profiled roller, the outer surface of which defines a plurality of radial projections and recesses distributed along the length of the roller and first and second co-operating rollers rotatable at the same speed as the profiled roller. The first and second co-operating rollers define projections and recesses complementary to those of profiled roller and define first and second treatment nips which serve to increase the width of a web of material passed therethrough. The projections on the co-operating roller defining the second treatment nip extend more deeply into the recesses of the profiled roller than do the projections on the co-operating roller which defines the first treatment nip so that the web of material is stretched gradually over two stages with the stretching effect being uniform across the entire width of the web.