Method and device for the mask welding of moving plastic films by lasers
US7297222B2 · kind B2 · utility
3Cited by
1References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 3, 2004 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Jun 6, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/0027
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and device allows dynamic mask welding with online position adjustment in the high-speed welding of structured and endless plastic films. By a transparent driven mask roller provided with masks being arranged in a passive pressure roller surrounding the mask roller, detection can take place optically, and the mask roller and consequently the mask are synchronized with the film speed. Adjustment is detached from a film transport mechanism and does not influence the welding process and in this case, above all, the speed. High film transport speeds in the range of up to 1000 mm per second can be employed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.