Contactless web turning guide
US4288015A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 1980 |
| Grant date | Sep 8, 1981 |
| Priority date | — |
| Expiry date | Feb 11, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2406/112
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A contactless web turning guide comprises a guide member that extends across the web and curves arcuately along a direction in which the web moves. The web floats in proximity to the convex surface of the guide member on a film of air confined by means of elongated air nozzles around its periphery. A pair of elongated edge-jet outlets extends along each edge of the web, parallel to the web edges, from one to the other of said nozzles. One edge-jet outlet of each pair is spaced a small distance outwardly from its adjacent web edge, the other a small distance inwardly from that edge, and the two edge-jet outlets of each pair discharge air along said surface in the direction across the width of the web towards the other pair of edge-jet outlets. Such edge-jet outlets conserve energy required for pressure air generation while affording more stable web travel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.