Drafting apparatus
US6308738A · kind A · utility
0Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1999 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Nov 30, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87281
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A drafting apparatus in a furnace. A buffer board having a plurality of gas intakes is disposed in a front end of the drafting apparatus. A laminar flow board having a plurality of gas outtakes is disposed in a rear end of the drafting apparatus. A drafting region is enclosed by the drafting apparatus. The drafting region comprises at least one drafting board to draft and redirect the gas flow. A laminar flow is then obtained to flow through the outtakes on the laminar board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.