Quick-release closure

Claim 1

A CLOSURE MEMBER COMPRISING AN ELONGATED STRAP OF FLEXIBLE RESILIENT MATERIAL FORMED WITH AN ENLARGED HEAD AT ONE END, A RELATIVELY WIDE BAND PORTION NARROWER AND LOWER THAN SAID HEAD EXTENDING INTEGRALLY OUTWARDLY FROM THE BOTTOM OF THE LATTER, AND A RELATIVELY NARROW BAND PORTION OF SUBSTANTIALLY THE SAME HEIGHT AS SAID WIDE PORTION ALIGNEDLY EXTENDING THEREFROM AT A LOCATION REMOTE FROM SAID HEAD, SAID WIDE PORTION BEING PROVIDED AT ITS UNDERSIDE WITH A LONGITUDINAL FIRST ARRAY OF TRANSVERSE SAWTEETH FACING IN THE DIRECTION OF SAID HEAD, THE LATTER BEING SPROVIDED WITH A THROUGHGOING CHANNEL WIDE ENOUGH TO RECEIVE SAID WIDE PORTION AND DISPOSED IN LINE THEREWITH SUBSTANTIALLY AT THE LEVEL OF THE UPPER SURFACE OF SAID WIDE PORTION, SAID HEAD BEING FURTHER PROVIDED WITH A NARROWER THROUGHGOING SLOT OPEN AT THE TOP SURFACE OF SAID HEAD AND REGISTERING THROUGHOUT ITS LENGTH WITH SAID CHANNEL WHEREBY A THROUGHGOING PASSAGE WITH A CROSS-SECTION GENERALLY OF INVERTED-T SHAPE IS FORMED IN SAID HEAD IN LINE WITH SAID WIDE AND NARROW PORTIONS, SAID SLOT HAVING A LENGTH LESS THAN THAT OF SAID NARROW PORTION AND BEING NARROWER THAN SAID WIDE PORTION BUT WIDE ENOUGH TO RECEIVE SAID NARROW PORTION FROM ABOVE UPON A LOOPING OF SAID STRAP BACK UPON ITSELF WITH SAID NARROW PORTION OVERLYING SAID SLOT, SAID CHANNEL BEING PROVIDED AT ITS FLOOR WITH AN UPSTANDING SECOND ARRAY OF TRANSVERSE SAWTEETH NORMALLY FACING IN THE SAME DIRECTION AS THOSE OF SAID FIRST ARRAY, AND GRIP MEANS AT THE OTHER END OF SAID STRAP FOR PULLING SAID WIDE PORTION INTO SAID CHANNEL UPON INSERTION OF SAID NARROW PORTION INTO SAID CHANNEL BY WAY OF SAID SLOT WHEREBY THE SAWTEETH OF SAID ARRAYS INTERENGAGE AND PREVENT WITHDRAWAL OF SAID WIDE PORTION FROM SAID CHANNEL IN A LOOP-WIDENING DIRECTION, SAID CHANNEL HAVING UPPER WALL PORTIONS ALONGSIDE SAID SLOT BEARING RESILIENTLY UPON SAID WIDE PORTIONS FOR MAINTAINING SAID SAWTEETH ENGAGED.