Reinforced sleeve assembly.

摘要

A reinforced sleeve assembly for use in gas filtration comprises a hollow sleeve (2) of woven glass fibre fabric having laminated thereto a porous expanded PTFE membrane, a rigid interior support ring (4) inside the sleeve, and a channel shaped exterior clamping member (6) tightened around the ring on the outside of the sleeve so as to locate the ring in place. The arrangement allows the reinforcing rings to be positively located without stitching, which would lead to pinholes liable to degrade the filtration performance. <IMAGE>