Patent ID: 6426793
Filing Date: 2002-07-30
Classification: B05C,G03C

Abstract:
A process for detecting a fault in a surface of a flowing liquid sheet, the process comprising the steps of:transmitting an electromagnetic beam to the sheet so as to irradiate approximately an entire width of the sheet in a direction approximately transverse to the sheet; recovering a position of a beam reflected by the sheet on a surface of a collector, said reflected beam being the reflection, from the sheet, of the transmitted electromagnetic beam; noting deviations of the position of the reflected beam on the surface of the collector with respect to a previously defined reference position on the surface of said collector corresponding to a situation wherein no fault is noted on the flowing sheet; and stopping the flow of the flowing liquid sheet if a deviation corresponding to the reflected beam position on the collector from the previously defined reference position of said reflected beam on said collector is beyond a threshold value of said deviation.