Annular die spiral groove configuration
US8939751B2 · kind B2 · utility
0Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2013 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Mar 29, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T409/303752
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An annular die has a mandrel having a spiral groove formed in a surface of the mandrel that distributes a flow of liquid across the mandrel surface and directs the flow of liquid in a flow direction across the spiral groove and across the mandrel surface. At least a portion of the spiral groove has a cross-section configuration where an interior surface of the spiral groove portion is oriented toward the flow direction as the interior surface extends to and intersects with the mandrel surface. The annular die has particular, but not limited, application as a blown film die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.