Apparatus for the extrusion of patterned sheets of thermoplastic synthetic resins

US4185951A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Kurt Webermeier · Bonn, DE
• Waldemar Wissinger · Siegburg, DE
• Otto Rulle · Siegburg, DE

Key dates

• Filing date: May 10, 1977
• Grant date: Jan 29, 1980
• Expiry date: May 10, 1997

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C2948/92952
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for the extrusion of patterned sheets of thermoplastic synthetic resins wherein a transparent basic synthetic resin material is combined with at least one differently colored secondary synthetic resin material, and wherein the combined stream of material made up of the basic material and the secondary material flows, during the extrusion, at least in partial zones at right angles to the extrusion flow direction, based on the flow cross section, is disclosed.