Dry end of a paper machine

Details Dry end of a paper machine Dry end of a paper machine

1998-03-17

2000-10-03

Fiorilla, Christopher A.

Paper making and fiber liberation

Apparatus

With coating or impregnating means

162135, 162136, 162264, 162266, D21H 2506

Patent

active

061267872

ABSTRACT:
A method for producing surface-treated paper, in particular of fine paper, and a dry end of a paper machine that makes use of the method. A paper web that has been dewatered by pressing is dried in the forward dryer section, in which drying energy is applied to the paper web over the entire length of the forward dryer section asymmetrically in the z-direction from the side of the bottom face of the web. This step is carried out by a number of successive groups with single-wire draw that are open downward. In this manner, shrinkage of the web both in the machine direction and in the cross direction is reduced or at least partially prevented, which shrinkage tends to take place when the dry solids content becomes higher. Paper broke is removed from underneath the drying groups that are open downward substantially by the force of gravity onto the broke conveyor placed underneath. The paper web which has a tendency of curling because of the asymmetric forward-drying is passed to the finishing section where it is finished while it is moistened and/or worked plastically so that the tendencies of curling that arose in the web in the forward drying stage are substantially reduced.

REFERENCES:
patent: 2281496 (1942-04-01), Hanson
patent: 2320883 (1943-06-01), Parkinson
patent: 2344686 (1944-03-01), Fanselow
patent: 3016622 (1962-01-01), Gade et al.
patent: 3260642 (1966-07-01), Canter, Jr.
patent: 3370359 (1968-02-01), Beachler
patent: 3490689 (1970-01-01), Hart et al.
patent: 3610899 (1971-10-01), Dahlin
patent: 3658642 (1972-04-01), Keyes, IV et al.
patent: 3753298 (1973-08-01), Ely
patent: 3767900 (1973-10-01), Chao et al.
patent: 3815254 (1974-06-01), Mills
patent: 3868780 (1975-03-01), Soininen et al.
patent: 3886036 (1975-05-01), Dahlin
patent: 4183148 (1980-01-01), Koski et al.
patent: 4202113 (1980-05-01), Kankaanpaa
patent: 4253245 (1981-03-01), Perrault
patent: 4314878 (1982-02-01), Lee
patent: 4441263 (1984-04-01), Vedenpaa
patent: 4502231 (1985-03-01), Fissman et al.
patent: 4516330 (1985-05-01), Eskelinen et al.
patent: 4602439 (1986-07-01), Eskelinen et al.
patent: 4625430 (1986-12-01), Aula et al.
patent: 4701857 (1987-10-01), Robinson
patent: 4818342 (1989-04-01), Wagle et al.
patent: 4905380 (1990-03-01), Eskelinen et al.
patent: 4972608 (1990-11-01), Ilvespaa
patent: 4982513 (1991-01-01), Loser et al.
patent: 5022163 (1991-06-01), Ilvespaa et al.
patent: 5065529 (1991-11-01), Skaugen et al.
patent: 5131324 (1992-07-01), Lassila et al.
patent: 5146696 (1992-09-01), Mayer et al.
patent: 5177880 (1993-01-01), Preisetanz et al.
patent: 5269074 (1993-12-01), Sims et al.
patent: 5377428 (1995-01-01), Clark
patent: 5416980 (1995-05-01), Ilvespaa
patent: 5469636 (1995-11-01), Plomer
patent: 5470436 (1995-11-01), Wagle et al.
patent: 5590593 (1997-01-01), Korhonen
patent: 5690999 (1997-11-01), Rantanen
"The Valmet Sym-Run Concept", Paper Asia, May/Jun. 1989, pp. 38-42.
W. Haessner, "Trocknungstechnik und deren Entwicklung", Das Papier 44, 10A, 1990, pp. 155-163.
Jouko Yli-Kauppila, "Dryer Section for High Speed Paper Machines", Proceedings of the Helsinki Symposium of Alternate Methods of Pulp and Paper Drying, Jun. 4-7, 1991.
Sam Palazzolo, "No-draw Drying", Tappi Journal, Sep. 1990.
W. Leitenberger, "Die CONTIRUN-Trockenpartie fur schnellen, sicheren Bahnlauf", Das Papier, Heft 6, 1992.
Ville Korhonen and Annti Kuhasalo, "Ropeless Tail Threading From Press to Reel", World Pulp & Paper Technology 1993, pp. 141-144.
H. Lepisto and P. Eskelinen, "Verbesserung der Lauffahigkeit schneller Papiermaschinen mit Hilfe neuer Ventilationseinrichtungen", Das Papier 39, Hecht 10A, 1985, pp. V198-V201.
K. Lindberg, K. Juppi and P. Eskelinen, "High Speed Dryer Section Developments for Sheet Stability", 78th Annual Meeting, Technical Section, CCPA 1992.
Dykes, "Current Techniques for Control of Water Removal at the Presses and Dryers", Pulp & Paper Magazine of Canada, pp. 101-108, vol. 72, No. 1, Jan. 1971.
Meisel, Robert M., "Analog Computer Simulation of Paper Drying", Tappi, vol. 60, No. 1, Jan., 1977, pp. 160-162.
Roberts, Richard W., et al., "Some Plain Talk on Digital Computers", Pulp & Paper, Aug. 12, 1968, pp. 32-37.
Holm, Robert A., et al. "Review of Process Control", Tappi, vol. 53, No. 9, Sep. 1970, pp. 1638-1649.
Hartley, F.T. et al., "The Dynamic Identification of the Drying Process in a Paper Mill", Computers in Engineering, Perth, Australia, Sep., 1976, pp. 168-172.
Petitjean, A.L., "Non-Destructive<Measuring of Drying Profile in Machine Direction", Paper Trade Journal, Jul., 1959 pp. 32-34.

Affiliated with

Also associated with

Rating

Dry end of a paper machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dry end of a paper machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dry end of a paper machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-191189