Method for joining a metal foil with a foil of a synthetic material
US5951801A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Apr 29, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1715
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method for joining a metal foil with a synthetic material foil comprises unwinding both materials from a supply roll each, and subjecting the synthetics foil, prior to the application of an adhesive, to a corona discharge on a narrow border region. The metal foil and the synthetic material foil are then pressed together and irradiated by ultraviolet radiation causing polymerization of the adhesive. The composite foil material thus obtained is transferred to a further processing station. There the dental matrix can be punched out of such a composite sheet material, having a high tensile strength, whose metal portion can easily be inserted between two adjacent teeth whereas the transparent synthetic material part allows light curing of the dental filling material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.