They are also used quite a bit in the packaging world. Lots of shrink-wrap, hot glue boxes, hot-seal cartons etc. I think they are even used for some soldering application...but never seen them
This is off my suppliers web-site.
Packaging:
High speed poly-coated paperboard sealing
High speed heat shrink installations
Forming
Curing adhesives
Sterilizing bottles or cartons
Automotive:
Hot air bonding of body panels
Curing adhesives
Simulation of engine exhaust
Fuel cell testing
Plastics/Rubber:
Salt removal from rubber extrusions
Bending and forming of plastics
De-flashing of molded parts
Textiles:
Welding plastic or vinyl fabrics
Heat-treating specialty fabrics
Soldering/Brazing:
Single or multiple station soldering operations
Semiconductor and Electronics:
Air knife in wave solder machines
Soldering/desoldering PC boards, lead frames, capacitors
Multi-station desoldering of surface mount devices from one central heat source
Wafer and PC board drying
Heat shrinking wire insulation
Preheating process gases
Sterilization:
Pharmaceuticals
Medical/surgical hardware
Packaging materials
Paper/Printing:
Speed drying coated paper
Adhesive activation
Ink drying