Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Mechanical defibration in the presence of heated gas or gas...
Reexamination Certificate
2005-05-31
2005-05-31
Alvo, Steve (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Mechanical defibration in the presence of heated gas or gas...
C162S028000, C162S068000
Reexamination Certificate
active
06899791
ABSTRACT:
A method and apparatus for pretreating or conditioning lignocellulose fiber containing feed material in preparation for conversion to pulp. Wood chips are pretreated under conditions of elevated temperature, pressure and humidity and subsequently compressed to cause destructuring of the fibers of the feed material. The pretreated wood chips are then converted to pulp using such methods as the ground wood pulping process or chemical digestion process.
REFERENCES:
patent: 2145851 (1939-02-01), Asplund
patent: 2323194 (1943-06-01), Beveridge et al.
patent: 2396587 (1946-03-01), Lowgren et al.
patent: 2422522 (1947-06-01), Beveridge et al.
patent: 2904460 (1959-09-01), Nolan
patent: 2935931 (1960-05-01), Ginaven
patent: 2943012 (1960-06-01), Dunning et al.
patent: 2972171 (1961-02-01), Heritage
patent: 2975096 (1961-03-01), Ginaven et al.
patent: 3098785 (1963-07-01), Meiler
patent: 3338525 (1967-08-01), Asplund et al.
patent: 3446699 (1969-05-01), Asplund et al.
patent: 3661328 (1972-05-01), Leask
patent: 3765611 (1973-10-01), Steiniger
patent: 3910505 (1975-10-01), Reinhall
patent: 4136831 (1979-01-01), Cederquist et al.
patent: 4372495 (1983-02-01), Marton et al.
patent: 4372810 (1983-02-01), Bystedt
patent: 4486267 (1984-12-01), Prusas
patent: 4869783 (1989-09-01), Prusas et al.
patent: 5244541 (1993-09-01), Minton
patent: 5622598 (1997-04-01), Prough
patent: 0 034 560 (1981-08-01), None
patent: 0 609 542 (1994-10-01), None
patent: 89610 (1993-03-01), None
patent: 2356763 (1977-06-01), None
patent: WO 89/10998 (1989-11-01), None
patent: WO 91/12367 (1991-08-01), None
patent: WO 91/19851 (1991-12-01), None
patent: WO 92/1371 (1992-08-01), None
patent: WO 92/13710 (1992-08-01), None
patent: WO 94/16139 (1994-07-01), None
patent: WO 95/34711 (1995-12-01), None
patent: WO 96/41914 (1996-12-01), None
patent: WO98/59107 (1997-06-01), None
“Refining Intensity and Pulp Quality in High-Consistency Refining”, K. Miles, Paper and Timber 72(1990):5, pp. 508-514.
“A Simplified Method for Calculating the Residence Time and Refining Intensity in a Chip Refiner”, K.B. Miles, Paper and Timber 73(1991):9, pp. 851-857.
“High Pressure Refining and Brightening in Thermomechanical Pulping”, W.E. Lunan et al, 1983 Pulping Conference, pp. 239-253.
“Can we Reduce Energy Consumption in Mechanical Pulping?”, Jan Sundholm, International Mechanical Pulping Conference (1993) Oslo, Norway, pp. 133-142.
Alix Yale & Ristas, LLP
Alvo Steve
Andritz Inc.
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