PTFE seal fabrication method
US6676880B1 · kind B1 · utility
1Cited by
17References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 19, 2002 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Aug 19, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/26
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A PTFE seal and method of fabrication therefor includes preparing a mixture of PTFE resin powder and a susceptor material which is then compacted and sintered by exciting the susceptor material with microwave energy. Preferably, the compaction and sintering of the mixture is carried out in a continuous process and a vacuum is drawn on the mixture in the heating zone to extract any air from the mixture. The sintered mixture is advanced, preferably continuously, to a cutting zone where PTFE wafers are cut from the sintered mixture, preferably while the mixture is still warm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.