Method for producing long stretched film, and device for producing long stretched film
US9314960B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2012 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Mar 22, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2007/008
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a method for producing a long stretched film, including at least the steps of: forming a long film containing a thermoplastic resin; stretching the long film in an oblique direction; and winding the long film having been subjected to the oblique stretching. The oblique stretching is performed in a heating section including a preheating section, a stretching section, and a thermosetting section, the preheating section and the stretching section are separated from each other by a partition wall. The stretching section and the thermosetting section are separated from each other by a partition wall, each of the partition walls has an opening for permitting the long film to pass, and slide members independently movable on the opposite sides of the opening and in widthwise directions of the long film, the slide members can adjust the width of the opening and the widthwise position of the opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.