Method and apparatus for extrusion of thermoplastic handrail
US10940625B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2018 |
| Grant date | Mar 9, 2021 |
| Priority date | — |
| Expiry date | May 2, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/709
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for extrusion of an article is provided. A die assembly can apply flows of thermoplastic material to an array of reinforcing cables to form a composite extrusion. A slider fabric can be bonded to one side of the composite extrusion. After exiting the die assembly, the slider fabric can act to support the extrudate as it passes along an elongate mandrel, which can cause the base of the slider fabric to change shape from a flat profile to the final internal profile of the article. The extruded article can then be cooled to solidify the material. The die can include cooling for the slider fabric and means for promoting penetration of the thermoplastic into reinforcing cables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.