Gymnastic floor covering

Claim 1

A GYMNASTIC FLOOR MAT OF FLAT RECTANGULAR SHAPE HAVING SPACED PARALLEL TOP AND BOTTOM SURFACES AND FIRST AND SECOND EDGES PARALLEL TO EACH OTHER AND NORMAL TO THIRD AND FOURTH EDGES PARALLEL TO EACH OTHER AND NORMAL TO EXTENDING OUTWARDLY FROM SAID FIRST EDGE SUBSTANTIALLY IN THE PLANE OF SAID BOTTOM SURFACE, AN ELONGATED FLAT FIRST STRIP OF FASTENING MATERIAL SECURED TO AND OVERLYING SAID SUPPORTING STRIP AND EXTENDING ALONG THE STRIP AND SAID FIRST EDGE IN A PLANE PARALLEL TO SAID TOP SURFACE, SAID TOP SURFACE AND ADJACENT PORTIONS OF SAID MAT BEING FREE OF STRIPS OF FASTENING MATERIAL, AND AN ELONGATED FLAT SECOND STRIP OF FASTENING MATERIAL SECURED TO AND LYING AGAINST SAID BOTTOM SURFACE WITHIN THE PERIPHERY OF THE MAT AND ALONG SAID SECOND EDGE IN A PLANE PARALLEL TO SAID TOP SURFACE, SAID FASTENING STRIPS BEING OF THE COMPLEMENTARY OVERLAPPING GRIPPER TYPE ADAPTED TO ENGAGE EACH OTHER TO RESIST SEPARATION IN THE PLANE OF OVERLAPPING AND TO BE SEPARATED EASILY BY FORCES IN A DIRECTION NORMAL TO SUCH PLANE AND EACH OF SAID FASTENING STRIPS BEING ADAPTED FOR GRIPPING ENGAGEMENT WITH A COMPLEMENTARY FASTENING STRIP ON A SIMILAR MAT TO CONNECT THE MATS EDGE TO EDGE TO FORM A CONTINUOUS UPPER MAT SURFACE WITH THE COOPERATING FASTENING STRIPS CONCEALED ON THE UNDERSIDE OF THE MATS AND MAINTAINED IN GRIPPING ENGAGEMENT BY THE WEIGHT OF A PERFORMER ON THE MATS.