Self threading air bar
US6443389B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Oct 19, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2406/111
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An air-bearing apparatus for aiding in conveying a web is taught comprising a central web support housing including a cylindrical surface and two sides. There is an end cap positioned adjacent each of the two sides, the end caps and the central web support housing defining at least one plenum therein. The central web support housing is provided with a plurality of bores extending from the at least one plenum to the cylindrical surface, the plurality of bores forming at least one row of air jet orifices in the cylindrical surface wherein each bore is directed approximately parallel to a cylindrical axis of the central web support housing with adjacent bores being oppositely directed, the at least one row of air jet orifices extending around at least a portion of the circumference of the cylindrical surface over which the web travels. The air jets are preferably equally spaced around that portion of the circumference of the cylindrical surface that the web travels (the working circumference) and alternate to the left and right exiting the cylindrical surface at the web centerline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.