Method of removing volatile matters from vent arrangement
US5759238A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1996 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Jun 13, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/63
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a vent arrangement comprising a heating cylinder 1 containing therein a screw and provided with a vent hole 3 and a reduced pressure exhaust path 4 provided with a vacuum pump and connected to the vent hole 3 for draining volatile fractions of a material to be molded from the heating cylinder by reducing the pressure in the vent hole by means of the vacuum pump, said volatile fractions are removed by arranging in the exhaust path a filter unit 7 filled with a granular filtering material 8. The material to be molded is used for the filtering material 8. According to the above construction, it can be achieved to efficiently remove volatile matters by using the molded material as the filtering material of the filter unit arranged in the reduced pressure exhaust path of a vent arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.