Spinnerets, breaker plates and die bodies having contoured surfaces with no flat surfaces between adjacent holes
US12188155B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2021 |
| Grant date | Jan 7, 2025 |
| Priority date | — |
| Expiry date | May 3, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/00526
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A spinneret for extruding fibers includes a plate having a proximal surface and a distal surface. The spinneret includes a plurality of holes formed in the plate that extend between the proximal surface and the distal surface of the plate. The holes are spaced from one another, and each hole has a distal end that extends along a central axis. The spinneret has a plurality of contoured entrance zones formed in the proximal surface of the plate, whereby each contoured entrance zone is associated with one of the holes. Each contoured entrance zone extends distally from the proximal surface of the plate to a proximal end of the hole associated therewith. Each contoured entrance zone has substantially no planar or flat surfaces normal to the direction of the central axis of the distal end of the hole associated therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.