Process for assembling two films, in particular films of a few microns thickness
US4812189A · kind A · utility
Inventor
Key dates
| Filing date | Mar 11, 1987 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | Mar 11, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1015
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a process for joining films by heat sealing, where these films are in rolls (9) and in particular a few microns thick. In a first stage, this process consists in spreading out a first film (1) on an assembly table (5) while hemming one of its longitudinal edges with a junction tape (3) and a positioning tape (4) sealed on that side of the junction tape (4) which is opposite the film. Once the desired film length has been reached, the film is transversely cut off and the positioning tape (4) then is used to handle this first film (1) and to assure its alignment with a segment of the film (2) packed on the roll (9). The second joining stage then consists in spreading out the film (2) on the table (5) while sealing a longitudinal edge of said film (2) to the outer side of the junction tape (3) following separation of the positioning tape (4) from this junction tape (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.