Web air threading system and methods of use
US11692311B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Sep 9, 2020 |
| Grant date | Jul 4, 2023 |
| Priority date | — |
| Expiry date | Sep 21, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2801/84
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An air nozzle apparatus that includes an air orifice and a nozzle housing, said nozzle housing configured as u-shaped having a first elongated sidewall, a second elongated sidewall, and a third curved sidewall formed continuous with said first elongated sidewall and said second elongated sidewall to form a channel having an open end opposite said third curved sidewall, said air orifice positioned centered in said channel and proximate a base of said third sidewall facing said open end, wherein said first elongated sidewall, said second elongated sidewall, and said third curved sidewall are configured having an arched top surface, and, thus, functions to optimize the Coanda effect to position and convey the paper web through an air threading chute to thread a paper web from the end of the drying step through the dry-end to the paper winding step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.