Fastener with a linearly oriented thermoplastic covering

Claim 1

A FASTENER HAVING AT LEAST A SHANK PORTION THEREOF IN THE FORM OF A FILAMENT AND WHEREIN SAID SHANK OF SAID FASTENER HAS ITS LEADING END OF SUBSTANTIALLY NO GREATER CROSS SECTIONAL AREA THAN ANY OTHER PORTION OF THE SHANK AND IS DRIVABLE LENGTHWISE INTO MATERIAL TO BE FASTENED AND WHEREIN THE HOLDING POWER OF SAID SHANK IS INCREASED, SAID SHANK COMPRISING A REINFORCING METALLIC CORE COMPRISING CONTINUOUS LONGITUDINALLY EXTENDING TRANSVERSELY SPACED PARALLEL MEMBERS DEFINING A LONGITUDINAL POCKET BETWEEN THEM, SAID LONGITUDINAL POCKET BEING OF A CROSS SECTIONAL AREA AT LEAST AS LARGE AS THE CROSS SECTIONAL AREA OF ONE OF SAID REINFORCING CORE MEMBERS, AND A THERMOPLASTIC MATERIAL BONDED TO EACH OF SAID CORE MEMBERS THROUGHOUT THE LENGTH THEREOF AND COMPLETELY ENCASING SAME IN SURROUNDING RELATION THERETO AND COMPLETELY FILLING SAID POCKET, SAID THERMOPLASTIC MATERIAL BEING OF SUCH COMPOSITION THAT SAME HAS AN ELASTIC MEMORY RECOVERY FACTOR, IS COMPRESSIBLE, RELATIVELY HARD, TOUGH AND FLEXIBLE TO THEREBY WITHSTAND SCRUBBING AND BENDING, AND WILL BOND TO CERTAIN METALS, SAID THERMOPLASTIC MATERIAL HAVING ITS FIBERS LINEARLY ORIENTED IN SUBSTANTIALLY PARALLEL RELATION TO THE LONGITUDINAL AXIS OF SAID SHANK WHEREBY THE THERMOPLASTIC MATERIAL IN SAID POCKET COMPRESSES UPON RELATIVE LATERAL MOVEMENT OF SAID CORE MEMBERS TOWARD EACH OTHER WHEN SAID SHANK IS DRIVEN INTO A MATERIAL TO BE FASTENED, SAID ELASTIC MEMORY RECOVERY FACTOR ENABLING THE THERMOPLASTIC MATERIAL TO EXPAND AGAINST THE WALLS OF THE APERTURE IN SAID MATERIAL TO BE FASTENED TO THEREBY INCREASED THE HOLDING RELATION OF SAID SHANK RELATIVE THERETO.