Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With squeezing – compression – rubbing – kneading
Reexamination Certificate
2007-06-12
2007-06-12
Griffin, Steven P. (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With squeezing, compression, rubbing, kneading
C162S380000, C210S104000, C210S105000, C210S107000
Reexamination Certificate
active
10689665
ABSTRACT:
The present invention relates to the thickening of pulp suspensions. A low consistency pulp suspension is fed to a pre-thickener (10) through an inlet conduit (18). A layer of thickened pulp, formed on a filter surface (22), is pushed along the filter surface by a cleaning member to the discharge end of the pre-thickener and is discharged through the outlet (20). The cleaning member comprises a rotating shaft (30), on which shaft at least one screw thread (32) is fixed so as to leave a free space between the shaft and the screw thread. Essentially non-thickened pulp is allowed to flow through the apparatus via this space.
REFERENCES:
patent: 3076610 (1963-02-01), Rosenfeld et al.
patent: 3682444 (1972-08-01), Reinhall
patent: 3833465 (1974-09-01), Campbell
patent: 4085050 (1978-04-01), Gervasi
patent: 4582568 (1986-04-01), Iyengar
patent: 4632729 (1986-12-01), Laakso
patent: 4954221 (1990-09-01), Reinhall et al.
patent: 5034128 (1991-07-01), Hillström
patent: 5147504 (1992-09-01), Henricson et al.
patent: 5863389 (1999-01-01), White et al.
G.A. Smook, Handbook for Pulp & Paper Technologists, 1982, TAPPI and Canadian Pulp and Paper Association, pp. 109 & 111.
Grace et al: “Pulp and Paper Manufacture”, Third Ed., vol. 5, Alkaline Pulping, pp. 153-155.
Laine Antero
Ljokkoi Risto
Pikka Olavi
Qvintus Harri
Siik Sami
Andritz-Ahlstrom Oy
Cordray Dennis R.
Griffin Steven P.
Nixon & Vanderhye P.C.
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