Treating airborne web material
US4137644A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1976 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | Nov 30, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2406/112
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Web material is carried on air to advance the material in a fixed stable floating position through one or more decks of a treating plant, preferably a drier. The air is supplied through pairs of apertures arranged in the upper surface of blow-boxes distributed in the conveying path of the material which apertures eject the air in pairs of streams facing away from each other. To reduce deflection of the material between said pair of apertures the space between said apertures is supplied separately with a great volume of secondary air of the same static pressure as that prevailing on the upper surface of the material, which secondary air is taken along by ejector effect by the primary air streams ejected from the apertures of the blow-boxes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.