Dry ice producing machine
US6516630B2 · kind B2 · utility
0Cited by
6References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 16, 2001 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Jul 24, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B32/55
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
When the start button is pushed after the door of the supply chamber is closed, carbon dioxide gas is ejected from the nozzle placed at the upper part of the horn. The carbon dioxide gas is converted to powdered dry ice by adiabatic expansion in the horn, and the dry ice falls on fresh food or other items to be cooled in a box or plastic bag placed under the horn. In order to obtain a desired amount of dry ice constantly, the ambient temperature, the pressure of the carbon dioxide gas, the interval time since the last ejection are counted in determining the carbon dioxide ejecting time length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.