Method and apparatus for producing a continuous web
US4712277A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1986 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Dec 3, 2006 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H27/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus for producing a continuous web of material (36) on an endless belt (24). Fibers suspended in a carrier gas are transported from a transport conduit (12) through a transition part (38) of zig-zag configuration, having cross-section which tapers or narrows in the flow direction. Arranged at the outlet aperture of the transition part is a coarse-particle separator means (22) which incorporates a curved, convex surface (60), an accept outlet (48), and a reject outlet (54). The carrier gas is deflected around the convex surface, as a result of the ensuing Coanda Effect, and transports acceptable fine fibers to the accept outlet (48), while coarse reject particles, due to their greater kinetic energy, pass in a straighter path to the reject outlet (54). The accept outlet leads directly to a distribution chamber (52) which is located above the endless belt (24), and opposite which there is provided a suction box (32) for extraction of the carrier gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.