Claims
- 1. A screen cylinder for cleaning or sorting a pulp mixture, the screen cylinder comprising:a plurality of support hoops encircling a longitudinal axis of the screen cylinder and spaced apart along an axial direction thereof, each said support hoop having an inner surface facing radially inwardly; and a plurality of screen wires arranged parallel to the longitudinal axis of the screen cylinder and spaced circumferentially at predetermined intervals to provide a cylindrical screen surface, the screen wires being attached onto the inner surfaces of the support hoops, the screen wires being attached to each said support hoop by welding from a side of each said support hoop facing away from the screen wire in such a way that a weld extends to the screen wire, whereby the visible section of the weld is on an outer surface of the screen cylinder; wherein mounting grooves are defined in the inner surface of each said support hoop and the screen wires are arranged in the mounting grooves before welding, and wherein a welding groove is defined in an outer surface of each said support hoop extending circumferentially therealong, the weld joining the screen wires to the support hoop extending through a bottom of the welding groove to the screen wires.
- 2. A screen cylinder according to claim 1, further comprising at least one additional ring-shaped support member having a projection fitted in the welding groove of one of the support hoops.
- 3. A screen cylinder according to claim 1, wherein each said screen wire is attached to a corresponding said support hoop by a separate weld.
Priority Claims (1)
Number |
Date |
Country |
Kind |
974084 |
Oct 1997 |
FI |
|
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation of pending PCT International Application PCT/FI98/00822, filed Oct. 22, 1998, designating inter alia the United States.
US Referenced Citations (6)
Foreign Referenced Citations (3)
Number |
Date |
Country |
A1 0 705 649 |
Apr 1996 |
EP |
A1 9734045 |
Sep 1997 |
WO |
A1 9814658 |
Apr 1998 |
WO |
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/FI98/00822 |
Oct 1998 |
US |
Child |
09/560408 |
|
US |