Method of making multilayer edge-sealed record carrier

US4208231A · kind A · utility

Assignee

• GAO Gesellschaft für Automation und organisation mbH · DE

Inventors

• Joachim Hoppe · Munich, DE
• Yahya Haghiri-Tehrani · Munich, DE
• Wolfgang Gauch · Otterfing, DE

Key dates

• Filing date: Dec 16, 1977
• Grant date: Jun 17, 1980
• Expiry date: Dec 16, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24777
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

In one method of making the record carrier, a paper sheet is formed with an almost completely perforated punch or blanking line defining a paper insert or core, and a separating layer is applied to the upper surface of the paper sheet in bordering relation with the punch or blanking line. A thin film border is positioned on the separating layer and overlaps, inwardly, the punch or blanking line. A backing film is provided with a silicone separating layer congruent with the paper insert, and is applied to the back of the paper sheet. The thus assembled layers are then laminated to each other. The paper insert and the thin film border are then printed, without transition, in at least one printing operation. After the printing, the backing film and the paper sheet are separated from the paper insert and the thin film border. The resulting composite insert or core is then sealed between the two transparent films. In another method, a paper insert is positioned on a backing film and embedded therein. The paper insert and the film area surrounding the paper insert are then printed, without transition, in at least one printing operation. The resulting composite insert or core is then seal…