Medical device with extruded member having helical orientation
US6776945B2 · kind B2 · utility
29Cited by
20References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2001 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Jul 13, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7542
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An elongate polymer member having molecular helical orientation formed by rotation immediately after passing through the extrusion head. The elongate polymer member is rotated downstream of the extrusion head in the molten state prior to solidification in order to impart the molecular helical orientation. Rotating the polymer member in the molten state allows the helical orientation to be imparted at the molecular level, and allows for more rotations per lineal foot of extrusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.