{HEAD ~ an additive product} in {TAIL ~ said chamber} for adding to said container after at least part of said membrane is severed 
in
{ HEAD ~ an additive product } in { TAIL ~ said chamber } for adding to said container after at least part of said membrane is severed
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH