Drying and gas or vapor contact with solids – Process – Gas or vapor contact with treated material
Reexamination Certificate
2005-03-01
2005-03-01
Rinehart, Kenneth (Department: 3749)
Drying and gas or vapor contact with solids
Process
Gas or vapor contact with treated material
C162S198000, C162S204000, C162SDIG006
Reexamination Certificate
active
06860033
ABSTRACT:
Tension variations in the paper web on a paper machine are caused by successive draws and moisture fluctuations. Good strength properties require optimization of the draws. In addition, the tension variation induced by moisture must be minimized. The analysis of local modulus and the strain components can be used for determining optimal locations for profiling actuators in order to achieve good tension profile. Longitudinal strain components of the web, i.e. reversible elastic strain, permanent plastic strain and frozen-in strain relievable with water are continuously measured and determined and the variation of said longitudinal components is minimized by correcting the moisture content of the paper web in a dryer section of the paper machine and/or by optimizing the draws between dryer groups in the dryer section.
REFERENCES:
patent: 3864842 (1975-02-01), Sawyer
patent: 4162563 (1979-07-01), Lawrence et al.
patent: 4920621 (1990-05-01), Metzen
patent: 5298121 (1994-03-01), Kilmister
patent: 5649448 (1997-07-01), Koskimies et al.
patent: 794012 (1958-04-01), None
patent: WO 0100924 (2001-01-01), None
patent: WO 0229156 (2002-04-01), None
International Search Report issued in International Patent Application No. PCT/FI01/00855.
International Preliminary Examination Report issued in International Patent Application No. PCT/FI01/00855.
Jentzen, C.A., the Effect of Stress Applied During Drying on Some of the Properties of Individual Pulp Fibers. Tappi 47 (1964) 7, s. 412-418.
Nanko, H., Asano, S. & Ohsawa, J., Shrinking Behavior of Pulp Fibers During Drying. Papers presented at 1991 International Paper Physics Conference. Kona, Hawaii, Sep. 22-26, 1991. TAPPI Press, Atlanta, 1991. Book 2, s. 365-373.
Hrun, M., The Influence of Drying Strategies on the Mechanical Properties of Paper. Doctoral thesis, Royal Inst. Technol., Stockholm 1980, 31 s.
Page, D.H. & Tydeman, P.A., Physical Processes Occurring During the Drying Phase. Transactions of the symposium held at Cambridge, Sep. 1965, vol. 1, Ed. F. Bolam, Tech. Sect. Br. Pap. Board Makers' Assoc., London, 1966, s. 371-396.
Giertz, H.W. & Rødland, G., Elongation of Segments—Bonds in the Secondary Regime of the Load/Elongation Curve. Tappi 1979 International Paper Physics Conference. British Columbia, Sep. 17-19, 1979. Tech. Sect. Can. Pulp Pap. Assoc., Montreal, 1979, s. 129-136.
Schulz, J.H., The Effect of Straining During Drying on the Mechanical and Viscoelastic Behavior of Paper. Tappi, 44 (1961) 10, s. 736-744.
Berthold, J., Water Adsorption and Uptake in the Fibre Cell Wall as Affected by Polar Groups and Structure. Doctoral thesis, Royal Inst. Technol., Stockholm 1996, 41s.
Laivins, G.V. & Scallan, A.M., the Mechanism of Hornification of Wood Pulps. Products of Papermaking. Transactions of the tenth fundamental research symposium held at Oxford, Sep. 1993. vol. 2., Ed. C.F. Baker, Pira International, Surrey 1993, s. 1235-1260.
Maloney, Thad C., ACTA Polytechnica Scandinavica, Chemical Technology Series No. 275. On the Pore Structure and Dewatering Properties of the Pulp Fiber Cell Wall.
Heikkinen Antti
Kettunen Heikki
Lätti Hannu
Metso Paper Inc.
Rinehart Kenneth
Stiennon & Stiennon
LandOfFree
Method for minimizing tension variation in a paper web... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for minimizing tension variation in a paper web..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for minimizing tension variation in a paper web... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3419701