Method and device for manufacturing obliquely stretched long film
US9266278B2 · kind B2 · utility
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1References
13Claims
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Key dates
| Filing date | Feb 29, 2012 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Feb 29, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing an obliquely stretched long film includes an oblique stretching step and a tension application step. In the oblique stretching step, a long film is stretched in an oblique direction with respect to a width direction into a stretched film (F). In the tension application step, while the stretched film (F) is being drawn along a longitudinal direction, a tension in a drawing direction is applied to the stretched film (F). Here, in the tension application step, the tension in the drawing direction of the stretched film (F) is changed in the width direction, and thus the stretched film (F) is drawn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.