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1. WO1996004423 - SIMPLIFIED LASER APPARATUS AND METHOD FOR MEASURING STOCK THICKNESS ON PAPERMAKING MACHINES

Publication Number WO/1996/004423
Publication Date 15.02.1996
International Application No. PCT/US1995/007136
International Filing Date 05.06.1995
IPC
D21F 7/00 2006.01
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
7Other details of machines for making continuous webs of paper
D21F 7/06 2006.01
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
7Other details of machines for making continuous webs of paper
06Indicating or regulating the thickness of the layer; Signal devices
CPC
D21F 7/003
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
7Other details of machines for making continuous webs of paper
003Indicating or regulating the moisture content of the layer
D21F 7/06
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
7Other details of machines for making continuous webs of paper
06Indicating or regulating the thickness of the layer; Signal devices
Y10S 162/10
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
162Paper making and fiber liberation
09Uses for paper making sludge
10Computer control of paper making variables
Applicants
  • WANGNER SYSTEMS CORPORATION [US/US]; 525 Piedmont Highway Greenville, SC 29605, US
Inventors
  • OSTERMAYER, Volker; US
  • FLEISCHER, Thomas, Berg; US
Agents
  • FLINT, Cort; P.O. Box 10827 Greenville, SC 29603, US
Priority Data
08/282,92429.07.1994US
08/337,77014.11.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SIMPLIFIED LASER APPARATUS AND METHOD FOR MEASURING STOCK THICKNESS ON PAPERMAKING MACHINES
(FR) APPAREIL LASER SIMPLIFIE ET PROCEDE SIMPLIFIE DE MESURE DE L'EPAISSEUR DE MATIERE SUR LES MACHINES DE FABRICATION DU PAPIER
Abstract
(EN)
An apparatus for monitoring the dewatering performance of a forming section of a papermaking machine (10) includes a laser measurement assembly (A) having at least one laser displacement meter (40) supported above a paper forming fabric (12) which carries paper stock (P). The laser meter (40) is located at a laser reference position, and generates a displacement signal representing a first distance between the paper stock and laser reference position. A carrier stand (B, BI) is provided for carrying the laser meter and a baseline reference device (42, 120) which provides a baseline reference position against which the displacement signal is analyzed to provide a paper stock thickness signal representing the amount of water present. A controller (100) receives the displacement signal and, together with the baseline reference measurement from either a second laser meter (42) or a contact element (120) processes an output value indicating the thickness of the paper stock, and hence the water content of the paper stock.
(FR)
Appareil permettant de contrôler l'extraction d'eau dans la partie égouttage d'une machine de fabrication de papier (10). Cet appareil comporte un ensemble de mesure à laser (A) comprenant au moins un enregistreur de déplacement à laser (40) fixé au-dessus du tissu d'égouttage de papier (12) qui transporte la matière première (P). L'enregistreur à laser (40) est placé en une position de référence. Il génère un signal de déplacement correspondant à une première distance entre la matière première et la position de référence. Un support (B, BI) est prévu pour la fixation de l'enregistreur à laser, tandis qu'un dispositif de référence de ligne de base (42, 120) fournit une position de référence de ligne de base par rapport à laquelle le signal de déplacement est analysé pour fournir un signal d'épaisseur de matière représentant la quantité d'eau présente. Un dispositif de commande (100) reçoit le signal de déplacement et, avec la mesure de référence de ligne de base provenant soit d'un deuxième enregistreur à laser (42) soit d'un élément de contact (120), traite une valeur de sortie indiquant l'épaisseur de matière première et, en conséquence, la teneur en eau de cette matière.
Also published as
FI962197
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