Wedge wire and paper stock screening apparatus incorporating such wedge wire
US6595373B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2001 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Mar 28, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D29/445
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A wedge wire for use in a wire type screen for screening papermaker's stock is formed with an elongated body (12) having an enlarged head (20) at the inlet surface of the screen. The head (20) is formed with tapered walls (30, 33) that cooperate to define grooves (28) at the inlet surface between adjacent elements including an upstream wall (30) and a downstream wall (33). A radiused protuberance or projection (37) defines one wall of a screening slot (15), with a wall surface (22) of an adjacent wedge wire element. The slot wall formed by the projection (37) is free of sharp edges and is limited in length, in the direction of flow through the slot (15), not substantially exceeding the gap width of the slot. The upstream wall (30) defining the groove (28) provides protection for the slot (15) against impact and damage by contaminants that may be contained in the papermaker's stock. The slot (15) is free of sharp corners so as not to impede flow through the slot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.