Patent ID: 6902321

Claim:
A bag having two generally parallel sheets forming main walls of the bag, closure strips fixed to respective ones of the sheets, and a cursor for actuating the closure strips for closing and opening purposes, the bag comprising, parallel to the closure strips, between said sheets, and level with a mouth of the bag, leakproofing structure in relief disposed on an inside of the closure strips, designed to provide sealing by forming a barrier between the sheets in a closed position of the bag, said leakproofing structure in relief being adapted to be urged towards a sealing position by the cursor when the cursor is moved towards a position for closing the bag, the leakproofing structure being made up of two beads secured respectively to inside surfaces of the two sheets, grooves located at the mouth of the bag, and also ribs projecting from inside surfaces of flanks of the cursor, which ribs penetrate respectively into said grooves.