Air cushioned turn bar
US4043495A · kind A · utility
Inventor
Key dates
| Filing date | Aug 24, 1976 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Aug 24, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2406/111
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus including a hollow cylindrical member for hydrodynamically supporting and changing the direction of a continuously moving sheet of web material through a predetermined angle. The cylindrical member comprises a series of apertures through which fluid under pressure passes from the hollow portion to the exterior surface of the bar. Each aperture includes a curved surface extending from the hollow portion to the exterior surface, causing the fluid to flow in a laminar path through the aperture. The fluid substantially follows the contour of the exterior surface of the cylindrical bar, thereby forming a fluid cushion for the sheet of web material as it passes over the bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.