Method for holding a moving film
US4683093A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1985 |
| Grant date | Jul 28, 1987 |
| Priority date | — |
| Expiry date | Nov 6, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C55/06
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method for holding a moving film comprising bringing each surface of a set of conductive rolls into contact with a front surface and a back surface of a moving film respectively, at least one of the surfaces of the set of rolls being constructed of an elastomer, and holding the moving film by the surfaces of the set of rolls while establishing a high electric potential difference between the set of rolls. The present invention provides a useful method for conveying or stretching the film at high speed without operational troubles, thereby providing a strong film free from scratches or foreign particles on the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.