Apparatus for the extrusion of patterned sheets or panels of thermoplastic synthetic resin compositions

US4128386A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

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

Key dates

• Filing date: Aug 4, 1976
• Grant date: Dec 5, 1978
• Expiry date: Aug 4, 1996

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C2948/92904
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for extruding patterned sheets or panels of differently colored thermoplastic synthetic resin compositions which include the steps of distributing additional color compositions outside of an extrusion duct of a basic color composition over a number of individual feed channels and introducing the additional color compositions at right angles to the direction of flow of the basic color composition into the interior of the stream of the basic color composition at locations over the width and thickness in an initial flow zone via said channels.