Patent · US Expired

Process and device for producing transparent plastic films, sheets or strips of at least two layers, by casting

US4563395A · kind A · utility

3Cited by

4References

22Claims

0Family size

Assignee

Saint-Gobain Vitrage · FR

Inventors

Manfred Gillner · Aachen, DE
Juergen Sieckmann · Aachen, DE

Key dates

Filing date	Jul 23, 1984
Grant date	Jan 7, 1986
Priority date	—
Expiry date	Jul 23, 2004

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31554
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to the production of transparent plastic films, sheets or strips of excellent optical quality. It proposes a process for producing these products by casting of a composition suitable for casting on a horizontal, plane casting support, in continuous movement to obtain at least a layer, which after it has consolidated, is detached from its support, turned over, then by casting a composition on the face of the first layer which, when being formed, initially was in contact with the support, to obtain a second layer, the first layer being placed on a horizontal, plane casting support.

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