Composite open bonnet for large industrial and medical gas cylinders.

摘要

The polymer body (1) includes a tapped metal or metal alloy insert (10). An Independent claim is included for the method of making the cap. The insert (2), preferably tapped with a screw thread, i placed around a molding core. The assembly is surrounded by a mold. Polymer constituents are introduced. Following polymerizatio disassembly takes place. The corresponding gas bottle with a cap is also claimed.