One-time use plastic lock

Claim 1

A LOCK SEAL COMPRISING AN ELONGATED NARROW BAND OF FLEXIBLE PLASTIC MATERIAL HAVING A SOCKET STRUCTURE AT ONE END AND A PLUG STRUCUTRE AT THE OTHER END, SAID SOCKET STRUCTURE CONSTITUTED BY A RECTANGULAR BOX-LIKE BODY HAVING SIDE WALLS, AN AOUTER END WELL, AN INNER END WALL AND A BASE WALL, SAID INNER WALL BEING CONNECTED TO THE BAND AND HAVING A RESTRICTED SOCKET OPENING FACING THE BAND, SAID BAND ADAPTED TO BE BEND FOR INSERTION OF THE PLUG STRUCTURE INTO THE SOCKET OPEING, SAID PLUG STRUCTURE INCLUDING A HEAD PORTION WITH FLEXIBLE SIDE ARMS, SAID ARMS INCLUDING A HEAD PORTION WITH FLEXIBLE SIDE ARMS, SAID ARMS NORMALLY PROJECTING LATERALLY OF THE ENDS OF THE OPENING TO PREVENT ENTRANCE THROUGH SAID OPENING, SAID ARMS ADAPTED TO BE PRESSED INWARDLY TO REDUCE THE OVERALL WIDTH OF THE HEAD AND ARMS AS A UNIT WHEREBY THE HEAD AND ARMS ARE ADAPTED TO PASS THROUGH THE OPENING WHEN THE ARMS ARE IN SUCH PRESSED CONDITION, MEANS TO THE BAND TO FACILITATE RUPTURE OF THE BAND BY MANUAL TWISTING PRESSURE THEREAGAINST, AND MEANS ON THE BASE WALL OF THE SOCKET STRUCTURE FOR INTERLOCKING WITH THE ARMS UPON RELEASE OF THE PRESSURE THEREAGAINST AND EXPANSION THEREOF INSIDE THE BOX-LIKE BODY, INCLUDING UPSTANDING LUGS ON THE BASE WALL AT THE END SOCKET OPENING IN THE INNER WALL, AND HORIZONTAL LUGS ON THE INNER SURFACES OF THE SIDE WALLS WITH SLATING PORTIONS LEADING TO THE UPSTANDING LUGS, SAID BASE WALL HAVING SPACED ELONGATED GROOVES IN THE TOP SURFACE THEREOF EXTENDING DIAGONALLY FROM A POINT ADJACENT THE AXIAL CENTER THEREOF TO THE SIDE WALLS ADJACENT THE UPSTANDING LUGS, SAID ARMS ADAPTED TO EXPAND RADIALLY AGAINST THE SLANTING PORTIONS OF THE HORIZONTAL LUGS AND DOWNWARDLY INTO THE GROOVES AND INTO INTERLOCKING ENGAGEMENT WITH THE UPSTANDING LUGS.