Process and apparatus for feeding cementitious slurry for fiber-reinforced structural cement panels
US7754052B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2006 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Mar 12, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28C5/404
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A head-box for depositing slurry upon a moving web including a main metering roll, a companion roll disposed in closely spaced relation to the metering roll and a vibrating gate which forms a nip between the metering roller and the gate. The nip is arranged to retain a supply of the slurry, and the rolls are driven so slurry retained in the nip progresses over an upper outer peripheral surface of the metering roll to be deposited upon the web. Also, preferably included is a doctor blade disposed in operational relationship to the metering roll for directing the slurry downwardly from the outer metering roll surface to a point above the surface of a carrier for a fiberglass layer upon which the slurry layer is deposited. The vibrating gate and doctor blade may be pivotally mounted to either side of the surfaces of the head-box.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.