Manufacture of wrinkle-free flouroplastic laminated panels
US4427475A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1982 |
| Grant date | Jan 24, 1984 |
| Priority date | — |
| Expiry date | Aug 30, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2315/085
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process and apparatus for manufacturing a laminated panel wherein a plurality of layers are laminated together under heat and pressure in a press having upper and lower platens, the uppermost layer being a thin film of fluoroplastics material. The film is suspended from the upper platen and stretched in a substantially horizontal plane spaced therefrom, the press thereupon being closed to press the film into contact with the adjacent layers of the laminate. The apparatus of the present invention comprises a laminating press having upper and lower platens, and rolls positioned outside of the press and adjacent the ends of the upper platen for suspending a film of fluoroplastics material longitudinally beneath the upper platen. Means are provided for stretching the film laterally to cause it to lie in a substantially horizontal plane spaced from the upper platen, comprising substantially horizontal rails positioned adjacent the sides of the press, below the level of the upper platen where the latter is raised, and multiple resilient connector elements for connecting the edges of the film to the rails.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.