Step air foil web stabilizer
US8061055B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2007 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Apr 11, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2801/21
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Web stabilizer particularly for one-sided flotation of a running web. The device includes two discharge slots which allow for increased draw down force, which flattens machine direction wrinkles in a floating web. There is a primary discharge slot and a second discharge slot spaced from and stepped down from the primary discharge slot, a first web support surface between the primary discharge slot and the secondary discharge slot, and a second web support surface downstream of the secondary discharge slot in the direction of web travel. An integral blower provides a supply of air that is uniformly distributed to the primary and secondary slots. Air discharged from the primary slot is gathered into the air stream of the secondary slot and creates an increased air cushion to provide greater support to the web and thereby remove machine direction web wrinkles caused by higher tension in light weight webs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.