Pharmaceutical container treatment chamber seal has second inner seal to act as back-up in event of first seal's failure

摘要

The chamber, having an opening (11) in its wall (12) that is covered by a window (15) or door with a peripheral pneumatic seal (20), has a second, inner seal (16) that acts as an isolating barrier in the event of the first seal's failure, preventing the penetration of contaminants into the chamber. The first seal (20) fits inside a frame (25), while the second seal is fitted between the surface of the chamber wall and the window or, in a variant, between a supporting frame and the window.