Global Patent Index - EP 1102892 A1

EP 1102892 A1 2001-05-30 - FOAM PROCESS IMPLEMENTATION USING FUZZY CONTROLLERS

Title (en)

FOAM PROCESS IMPLEMENTATION USING FUZZY CONTROLLERS

Title (de)

IMPLEMENTIERUNG EINES SCHAUMVERFAHREN MIT EINEM FUZZY-REGLER

Title (fr)

MISE EN OEUVRE D'UN PROCEDE DE MOUSSAGE AU MOYEN DE SYSTEMES ADAPTATIFS DE COMMANDE

Publication

EP 1102892 A1 (EN)

Application

EP 99934725 A

Priority

  • FI 9900579 W
  • US 11085798 A

Abstract (en)

[origin: WO0001882A1] Non-woven webs are produced from cellulose, synthetic, or glass fibers utilizing a foam-laid process by employing fuzzy controllers. By using a fuzzy controller, it is possible to precisely control the foam-laid process to allow production of non-woven webs of a variety of different types of fibers, which webs have high uniformity, and high predictability, by allowing the foam to be handled in such a way that it always remains stable and substantially uniform. By using fuzzy controllers one may control at least the wire pit level, the mixer/pulp level, the manifold pressure for the former, the foam density, the efflux ratio (the velocity of the foam divided by the velocity of the wire), surfactant feed, total basis weight of the web produced, and particularly when glass webs are being made, the binder tank level. Particular input parameters are used for each of the fuzzy controllers. For example, the fuzzy controller for automatically controlling the level in the mixer/pulp tank has as its input parameters at least some (two through all) of the density and flow rate of foam being recirculated to the tank from the wire pit, the pH of the foam in the tank, the level of the foam in the wire pit, and the fiber added to the tank. A neural net control may be utilized for effecting quality control of substantially the entire method or system for making a non-woven web, and laboratory testing information is fed to the neural net control to facilitate its functionality.

IPC 1-7 (main, further and additional classification)

D21F 11/00

IPC 8 full level (invention and additional information)

D21F 11/00 (2006.01); D21G 9/00 (2006.01)

CPC (invention and additional information)

D21G 9/0027 (2013.01); D21F 11/002 (2013.01); D21G 9/0054 (2013.01)

Citation (search report)

See references of WO 0001882A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0001882 A1 20000113; CA 2336616 A1 20000113; EP 1102892 A1 20010530; JP 2002519538 A 20020702; RU 2197575 C2 20030127; TW 533253 B 20030521

INPADOC legal status


2003-09-17 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030301

2002-07-24 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020607

2001-05-30 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010201

2001-05-30 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE