Device and process to permit monoaxial changes in the length of film webs
US12330364B2 · kind B2 · utility
0Cited by
69References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 19, 2021 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Dec 26, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C55/28
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In the case of a device to permit the monoaxial length change of film webs in machine direction, which comprises at least one processing gap delimited by two rolls via which a film web is routed in machine direction, whereby the first roll in film transport direction exhibits a first peripheral speed and the second roll in film transport direction exhibits a second peripheral speed, in order to produce film webs with low transverse neck-in as well as reduced edge build-up and to improve the flatness of the film web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.