Method of and apparatus for foaming a viscous material
US5874031A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 29, 1996 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Nov 29, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/26
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention resides in mixing low-pressure gas in a viscous material. The flow of the gas can be easily controlled so that the dispersion of the mixing ratio of the viscous material to the gas may be confined within a small tolerance and fine bubbles may be uniformly distributed in the interior of the viscous material. The gas is mixed in the viscous material by means of a first pump 42, from which a mixture of the gas and the viscous material is delivered. Pressure is applied to the mixture by means of a second pump 51. The gas is distributed in the interior of the viscous material by allowing the mixture under pressure to pass through a conduit assembly 61. The viscous material is foamed when the mixture is discharged from a nozzle 73 through a discharge pipe 71.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.