Hook fastening devices for garment material

Claim 1

A HOOK FASTENING DEVICE FOR ATTACHMENT TO A FABRIC MATERIAL, SAID DEVICE CONSISTING OF A HOOK MEMBER AND A SEPARATE BACK-PLATE MEMBER, SAID HOOK MEMBER COMPRISING A CANTILEVER HOOK TONGUE, A BASE PART WHICH IS SHORTER THAN SAID HOOK TONGUE, A CRANKED PORTION INTEGRALLY INTERCONNECTING SAID HOOK TONGUE AND SAID BASE PART FOR MAINTAINING SAID HOOK TONGUE OFFSET RELATIVELY TO SAID BASE PART, AND A PAIR OF POINTED ATTACHMENT PRONGS INTEGRAL WITH SAID BASE PART AND LOCATED ALONG A COMMON TRANSVERSE AXIS AT OPPOSED SIDE EDGES OF SAID BASE PART, SAID PRONGS BEING FOLDABLE ABOUT AXES EXTENDING SUBSTANTIALLY PERPENDICULARLY TO SAID TRANSVERSE AXIS, SAID BASE PART HAVING A LONGITUDINAL PORTION LOCATED OPPOSITE SAID HOOK TONGUE AND IN USE LYING AGAINST THE FABRIC MATERIAL TO PREVENT EXCESSIVE LIFTING OF SAID HOOK TONGUE; SAID BACK PLATE MEMBER COMPRISING A PLATE HAVING SPACED RECESSES FOR ALIGNMENT WITH SAID PRONGS AND A RAISED PORTION ADJACENT SAID RECESSES FOR ACCOMMODATING THE FOLDED PRONGS AND FOR PROVIDING A SEATING SURFACE TO WHICH SAID BASE PART AND THE INTERPOSED FABRIC MATERIAL ARE CLAMPED BY THE FOLDED PRONGS.