Coating delivered as bubbles
US4158076A · kind A · utility
42Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1977 |
| Grant date | Jun 12, 1979 |
| Priority date | — |
| Expiry date | Dec 29, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S68/90
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In a method of treating a surface such as a paper web with a treating agent, the treating agent is foamed under pressure and delivered via a passsageway to an application zone so as to come into close proximity with the surface to be treated which may be moved continuously past the application zone. A constriction, upstream in the direction of foam flow, of the passageway causes a pressure drop in the body of the foam causing bubbles of the foam to burst adjacent the surface, being treated whereby the treating agent is applied to the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.