Title:
IMPROVED WEDGE WIRE AND PAPER STOCK SCREENING APPARATUS INCORPORATING SUCH WEDGE WIRE
Document Type and Number:
WIPO Patent Application WO2000020091
Kind Code:
A8
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.
Inventors:
SEIFERT PETER (US)
Application Number:
PCT/US1999/023191
Publication Date:
July 20, 2000
Filing Date:
October 05, 1999
Export Citation:
Assignee:
THERMO BLACK CLAWSON INC (US)
SEIFERT PETER (US)
SEIFERT PETER (US)
International Classes:
B01D33/073; D21D5/16; B01D29/44; (IPC1-7): B01D29/44; B07B1/20
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