Sheet turn with vectored air supply
US6004432A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1998 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Jan 28, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2406/111
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In a papermaking machine for forming tissue paper, a turning bar is disposed having a curved surface about which a web of tissue paper is turned. The bar has an internal air plenum which supplies air to two sets of holes or slots. The first set is arranged to direct air normal to the curved surface of the bar or in the machine direction, the second set is arranged to direct air toward the edges of the tissue which is turned around the bar. The second holes or slots produce air jets which apply a cross machine direction tension to the web which prevents wrinkling of the web. The first set of holes or slots forms jets of air that prevent the tissue web from contacting the turning bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.