Apparatus for making transversely drawn films with substantially uniaxial character
US7229271B2 · kind B2 · utility
41Cited by
27References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2004 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Oct 17, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/041
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for stretching films is described. The process preferably stretches films in a uniaxial fashion. Preferably, optical films are stretched including multilayer optical films. Other aspects of the invention include a roll of stretched film and an apparatus for stretching films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.