Electrostatic assisted web cooling and remoistening device
US6735883B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 15, 2002 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Jul 15, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B21/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Apparatus and a method for enhancing the effectiveness of a water spray (30) to cool and/or remoisten a web (12) of material. The apparatus includes a web dryer, preferably a flotation dryer (100), an electrostatic charge generating device (31) or devices, a water spray (30), an integrated power supply (20) to supply high voltage power to the charge device, and a drainage system (35) for handling excess liquid generated during the cooling and/or remoistening of the web. The cooling apparatus is capable of a modular arrangement to optimize spacing and facilitate the addition of cooling capacity where needed, such as with faster web speeds or heavier web weights. One or more temperature sensors can be used to optimize the amount of and rate of fluid fed to the spray nozzles. The spray nozzles and charge bars can be retractable with respect to the web to facilitate web-up procedures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.