Patent · US Expired

Method of manufacturing of lacquer-coated extrusion products

US5738814A · kind A · utility

8Cited by

9References

5Claims

0Family size

Assignee

Battenfeld Extrusionstechnik GmbH · DE

Inventors

Norbert Kreth · Minden, DE
Reinhard Witt · Endingen am Kaiserstuhl, DE
Helmut Wiech · Gelsenkirchen, DE
Berrie Penney · Henley-on-Thames, GB

Key dates

Filing date	Jul 10, 1996
Grant date	Apr 14, 1998
Priority date	—
Expiry date	Jul 10, 2016

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2995/002
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A method of manufacturing of continuous, at least two-layer products having an upper layer formed of a lacquer material, the method having the steps of providing an apparatus including a co-extrusion tool having first and second conduits, respectively, with the first and second inlets, with the second conduit circumscribing the first conduit, and a merging section in which flows exiting the first and second conduits merge, and first and second extruders connected with the first and second inlets, respectively, and simultaneously injecting melts of base and lacquer materials with the first and second extruders, respectively, through the first and second conduits, respectively, so that on at least two-layer product exiting the merging section of the co-extrusion tool and having an upper lacquer layer, is produced in a single step.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.