Patent ID: 11965652
Assignee: VALMET AB
Field: Measurement (Instruments)
Classification: CPC F  D  G | IPC D  F  G

Claim 16:
17. A system for detecting unburnt fuel in an apparatus for drying, bonding and/or curing a web, the system comprising:
a ductwork;
a laser detection sensor including a laser transmitter and a laser receiver, the laser detection sensor configured to detect unburnt fuel inside of the ductwork; and
a system for mounting the laser detection sensor in the ductwork, the mounting system further comprising:
a laser transmitter mount configured to support the laser transmitter on a first side of the ductwork;
a laser receiver mount configured to support the laser receiver on a second side of the ductwork;
a laser path extending between the laser transmitter and the laser receiver, wherein the laser path includes an entrance port in the ductwork and an exit port in the ductwork; and
a flexible joint in the mounting system, wherein the flexible joint is configured to isolate at least one of the laser transmitter and the laser receiver from movement of the ductwork; and wherein the flexible joint is a bellows expansion joint positioned between the laser transmitter and the laser receiver.