Composite web decurling apparatus and method
US4808363A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Sep 4, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/053
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for treating a moving web of laminated composite material of the type having a relatively thin film layer adhered to a relatively thick paper layer for eliminating the tendency of the web to curl toward the film layer side thereof subsequent to being stored on a spool with the film layer of the web positioned inwardly of the paper layer of the web, the film layer and paper layer each having an exposed surface and an attached surface, the attached surfaces of the layers being adhered together, the paper layer having an outwardly positioned thickness portion which terminates at the exposed surface thereof, an inwardly positioned thickness portion which terminates at the attached surface thereof and an intermediately positioned thickness portion positioned between the outwardly positioned thickness portion and the inwardly positioned thickness portion, the outwardly positioned thickness portion being relatively stretched, the inwardly positioned thickness portion being relatively shrunk, the intermediately positioned thickness portion being relatively unstretched and unshrunk, the film layer being relatively shrunk through storage of the composite web on the spool, compri…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.