B - Operations – Transporting – 03 – B
Patent
B - Operations, Transporting
03
B
209/10
B03B 7/00 (2006.01) D21D 5/00 (2006.01) D21D 5/02 (2006.01)
Patent
CA 1335981
A method and apparatus for the removal of light material from a fiber suspension particularly suitable for removing light compressible plastic material such as expanded polystyrene and similar material from the short circulation of a paper machine. The plastic particles containing fiber suspension is divided in a degassing tank into reject and accept flows by the assistance of vacuum. The light reject containing flow is separated from the main flow by an overflow device and recirculated to the wire pit or corresponding device. A separation device such as a vibrating screen, vibrating drum, curved screen or inverted cyclone is provided within the light reject flow return duct for removing the detrimental plastic or other light material from the short circulation and for preventing the accumulation thereof in the wire pit.
605302
A. Ahlstrom Corporation
Gowling Lafleur Henderson Llp
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