Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With chemical or physical modification of liberated fiber
Reexamination Certificate
2007-02-20
2007-02-20
Hug, Eric (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With chemical or physical modification of liberated fiber
C162S024000, C162S181100, C162S181400, C162S182000, C241S021000
Reexamination Certificate
active
10672817
ABSTRACT:
A method for the preparation of fiber stock for the production of paper or cardboard, including the steps of:a) Supplying fibers in the form of a suspension that has a predetermined solids content,b) Loading of the fibers with a precipitation product, without refining the stock,c) Refining of the fibers after completion of the loading process, in order to improve the freeness value and/or to alter the fiber characteristics, andd) Transporting of the fiber stock suspension in direction of the paper machine.
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Smook, G.A., Handbook for Pulp and Paper Technologists, Chapter 13, pp. 194-208 (1992).
Doelle Klaus
Heise Oliver
Rheims Joerg
Sigl Ronald
Witek Werner
Hug Eric
Taylor & Aust P.C.
VOITH Paper Patent GmbH
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