Perforated deck made out of a plurality of segments

Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With classifying – separating or screening of pulp

Reexamination Certificate

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C162S357000, C210S410000, C210S784000

Reexamination Certificate



A cylindrical rotating thickening device including an axial core, a plurality of longitudinally extending spaced apart support ribs extending radially from the axial core, and a shell surrounding the support ribs and supported thereon. The shell includes a plurality of longitudinally extending spaced apart grooves, and a perforated deck surrounding and supported on the shell. The deck includes a plurality of closely adjacent deck segments, and each deck segment includes a leading edge and a trailing edge. Each deck segment further includes an integral bar attached to the leading edge and received in the shell groove, and a plurality of fasteners for securing the bar to the shell.

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