Patent ID: 6733178
Filing Date: 2004-05-11
Classification: A44B,B65D,Y10T

Abstract:
A bag having two generally parallel sheets forming main walls of the bag, complementary closure strips fixed to respective ones of the sheets, and a cursor for actuating the 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, and in a vicinity of the mouth, thrust means situated on a side of the closure strips opposite from a side on which said leakproofing structure being situated for providing thrust between opposing inside faces of the walls of the bag, and urging means provided on the cursor for urging the walls of the bag inwards in a zone of said walls lying between the leakproofing structure and the thrust means, the walls of the bag having beads faced in register with the leakproofing structure and in register with flanks of the cursor to guarantee that the leakproofing structure is urged into a leakproofing position when the bag is closed.