Method and apparatus for heat treating webs

摘要: Cylinder (20) for heat-treating rotates about a horizontal axis and is heated by complement of internal stationary infrared burners (38) that extend all along the length cylinder, but only partway around forming gap. An exhaust manifold (34) extending this cylinder in gap configured to prclude local accumulation high temperature exhaust. The accurate extent burner(s) proportioned establishing specified heat output when (are) supplied with air-fuel mixture at their maximum rate. Reduction supply rate over wide range allows be reduced as web processing speed reduced. When burner divided into segments, profile i.e. across width web, can regulated adjust moisture web.