EP 2449339 A1 20120509 - METHOD FOR THE CONTACTLESS DETERMINATION OF THE THICKNESS OF A WEB OF MATERIAL
Title (en)
METHOD FOR THE CONTACTLESS DETERMINATION OF THE THICKNESS OF A WEB OF MATERIAL
Title (de)
VERFAHREN ZUR BERÜHRUNGSLOSEN BESTIMMUNG DER DICKE EINER MATERIALBAHN
Title (fr)
PROCÉDÉ DE DÉTERMINATION SANS CONTACT DE L'ÉPAISSEUR D'UNE BANDE DE MATÉRIAU
Publication
Application
Priority
- EP 2010057887 W 20100607
- US 22263409 P 20090702
Abstract (en)
[origin: WO2011000667A1] The invention relates to a method for the contactless determination of the thickness of a web of material, especially a web of fibrous material, by means of a sensor array comprising at least two measurement plates, between which the web can be guided. An air cushion is generated between each measurement plate and the web so as to keep the measurement plates at a distance from the web. Said method is characterized in that a sensor array is used which comprises at least one magnetic sensor as well as optical distance measuring devices, wherein the distance between the measurement plates arranged on opposite sides of the web is magnetically determined, while the distance between a measurement plate and the web is determined using optical distance measuring devices which are located on the measurement plates arranged on opposite sides of the web.
IPC 8 full level
D21F 7/06 (2006.01); G01B 7/06 (2006.01); G01B 11/06 (2006.01); G01B 21/08 (2006.01)
CPC (source: EP US)
D21F 7/06 (2013.01 - EP US); G01B 7/107 (2013.01 - EP US); G01B 11/0691 (2013.01 - EP US); G01B 21/08 (2013.01 - EP US); G01B 2210/44 (2013.01 - EP US)
Citation (search report)
See references of WO 2011000667A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
WO 2011000667 A1 20110106; CA 2766845 A1 20110106; CN 102483321 A 20120530; EP 2449339 A1 20120509; US 2013003047 A1 20130103
DOCDB simple family (application)
EP 2010057887 W 20100607; CA 2766845 A 20100607; CN 201080039042 A 20100607; EP 10720795 A 20100607; US 201113339472 A 20111229