Dry ice pellitizer
US5475981A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | May 6, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B32/55
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention pertains to an apparatus and process for producing predetermined size and density dry ice pellets used for blasting operations. Liquid carbon dioxide is compressed into solid dry ice within a computer controlled piston and cylinder extruder. The applied pressure by the piston is controlled to produce solid dry ice at a predetermined pressure while forward movement is controlled in an intermittent start-stop cycle where the "start" mode controls the length of the dry ice extrudate while the "stop" mode enables an exterior cutting device to cut the extrudate to the predetermined length. Preferred pellets exhibit uniform dimensions such as cylindrical or cubic pellets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.