Paper making and fiber liberation – Apparatus – Digester
Reexamination Certificate
2011-04-26
2011-04-26
Halpern, Mark (Department: 1741)
Paper making and fiber liberation
Apparatus
Digester
C162S251000, C162S380000, C210S411000
Reexamination Certificate
active
07931779
ABSTRACT:
A screen for the screening of pulp suspensions is disclosed, including a screen basket, a rotor for providing pressure and suction pulses in the suspension to be screened along the screen basket, and a dilution liquid header for supplying dilution liquid to counteract thickening of the suspension during operation. The header forms a tubular channel, which divides the screen basket into at least two parts, extends around the basket, and is provided with a plurality of dilution ejection nozzles. Each ejection nozzle forms a channel including at least two channel sections; namely, an entrance channel section that opens into the channel of the header, and an exit channel section downstream of the entrance channel section, wherein the entrance channel section is substantially wider than the exit channel section.
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Fredriksson Börje
Fredriksson, legal representative Linus
Halpern Mark
Lerner David Littenberg Krumholz & Mentlik LLP
Metso Paper Inc.
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