Method, apparatus, and system for production of a stretched film
US9316773B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2012 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Mar 19, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2007/008
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a stretching zone (Z2) included in a plurality of zones for performing temperature control for heating or cooling of a film, the plurality of zones being arranged in the conveyance direction of the film, the film is stretched in a direction tilted in relation to the width direction of the film. The film is heated by a heating unit (11) having a heating region (H) positioned facing the conveyed film and positioned along a direction intersecting at an intersection angle φ with the conveyance direction in the plane of the film, in at least one zone including the stretching zone (Z2) and positioned further downstream in the conveyance direction from the stretching zone (Z2). At this time the intersection angle φ of the heating region (H) is adjusted in accordance with the orientation direction of the film stretched in the stretching zone (Z2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.