Method and apparatus for forming spherical particles of thermoplastic material
US4221554A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1978 |
| Grant date | Sep 9, 1980 |
| Priority date | — |
| Expiry date | Dec 29, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B2009/166
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention is concerned with a method for forming spherical particles of thermoplastic material, characterized by the step of blowing a stream of gas having thermoplastic particles dispersed therein from a peripheral region into a jet of pressurized hot gas to form the thermoplastic particles into uniform spherical particles. It also provides apparatus for carrying out the foregoing method which includes means for discharging a jet of pressurized hot gas from an outlet port and means for ejecting a stream of gas having thermoplastic particles dispersed therein from the periphery of the outlet port toward the jet of pressurized hot gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.