Rolled roof vent and method of making same
US5673521A · kind A · utility
83Cited by
14References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1996 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Mar 1, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1007
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An improved roll-form vent for buildings comprises a sequentially thermoformed polymeric vent which provides multiple venting air flow paths between the interior of a building and ambient atmosphere. The vent includes projections extending from a web and a plurality of vent openings that cooperate with screening to bar entry into the building of water, insects and foreign matter. A method of making the vent includes steps of providing a web of material of indeterminate running length, heating the web, sequentially thermoforming the web, cooling the web and rolling the formed vent for storage, shipment and use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.