Pressure check seal for fabric treating chamber - using flexible walls forced onto fabric upon pressure escape

摘要

Flexible walls defining an inlet passage to a fabric heat treating pressure chamber are forced onto the fabric when pressure escapes from the chamber and excess pressure zone into the upper zone on the other side of sealed forwarding rollers. These rollers are mounted inside a hollow shell. The flexible walls form a reliable, fast acting safety seal against escape of pressure from the chamber. The seal is sensitive to small pressure changes.