Gas film conveyor for elongated strips of web material
US5209387A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1990 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Sep 20, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B1/36
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Non-contact air film conveyors are suited for conveying elongated strips (46) of web material such as photographic film and include a track plate (12) having gas flow apertures (20,24; 72,74) extending through its thickness at angles to the surface of the track plate (.alpha.,.alpha.') and to the direction of movement of the strips (.beta.,.beta.', .gamma.). By directing air flow through some apertures (72,74) counter to the direction of movement, speed and acceleration control is achieved independent of the support given to the strips by air flow through other apertures (20,24). Baffles (28-36) and curved side walls (70,96) direct air back onto the film to flatten it during movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.