Patent ID: 7517150

Claim:
A bag comprising two generally parallel sheets forming main walls, closure strips fixed to respective ones of the sheets, said closure strips being adapted to be respectively separated to open the bag or engaged in one another to close the bag, and a cursor comprising two outside flanges and a wall interconnecting said outside flanges, said cursor receiving said closure strips for actuating the closure strips by selectively separating said closure strips for opening the bag and engaging said closure strips for closing the bag, said cursor being provided with ribs projecting from inside surfaces of said outside flanges at the base of said flanges opposite the wall so that said sheets forming the main walls of the bag converge one in comparison to the other from said closure strips to said ribs, and said sheets being furthermore provided with leakproofing structure in relief on at least one of the inside surfaces of the sheets, between said closure strips and said ribs so as to provide sealing by forming a barrier between the sheets in a closed position of the bag, said leakproofing structure in relief comprises one bead secured to the inside surface of one of the two sheets.