Circular duct and apparatus and method of fabrication
US5421938A · kind A · utility
12Cited by
12References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 8, 1992 |
| Grant date | Jun 6, 1995 |
| Priority date | — |
| Expiry date | Oct 8, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1064
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A round duct and apparatus and method of forming the duct in which the side edges of the duct are formed to interlock when the duct is folded and the flap is secured in place to provide support when the finishing duct tape is applied to seal the flap and complete the joint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.