Die, die assembly, equipment and method for forming rods of fibrous material
US11794424B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2018 |
| Grant date | Oct 24, 2023 |
| Priority date | — |
| Expiry date | Jul 4, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/14
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A die or die assembly for forming a bundle of fibres into a rod or tube comprises a body (84) defining a passage 86) for conducting the bundle fibres through the die from an inlet to an outlet, a constriction (91) in the passage having an entrance shaped to form the fibres of the bundle into a desired configuration as the bundle passes through the die, and one or more conduits (92) through which a treatment fluid e.g. steam, for curing the bundle of fibres may be introduced into the passage, and wherein at last one conduit is arranged to discharge fluid in the immediate vicinity of the entrance to the constriction to facilitate passage of the fibres through the die and reduce the risk of blockage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.