Fasteners and articles containing same

Claim 1

A FASTENER STRUCTURE ADAPTED TO BE REMOVABLY FASTENED ON A MATERIAL WITH PENETRABLE SURFACE OPENINGS AND COMPRISING A MOLDED SYNTHETIC POLYMER ARTICLE EMBODYING A MOLDED BASE WITH A GROUP OF CLOSELY SPACED, INTEGRALLY MOLDED, SMALL PROJECTIONS EMANATING FROM A FACE THEREOF, SAID PROJECTIONS OF SAID GROUP BEING ARRANGED IN TRANSVERSE, PARALLEL ROWS, SAID PROJECTIONS BEING SMOOTHSIDED AND TAPERING FROM THE BASES THEREOF TO RELATIVELY POINTED OUTER ENDS, THE LONGITUDINAL AXES OF SAID PROJECTIONS OF SAID GROUP BEING STRAIGHT LINES EXTENDING AT RIGHT ANGLES TO SAID ROWS AND OBLIQUELY TO SAID FACE AT AN ACUTE ANGLE NOT EXCEEDING 60* WITH RESPECT TO SAID FACE, SAID PROJECTIONS OF SAID GROUP HAVING AN OCCURRENCE CORRESPONDING TO 200-500 PROJECTIONS PER SQUARE INCH OF SAID FACE COVERED BY SAID GROUP OF PROJECTIONS AND HAVING A HEIGHT FROM THE RESPECTIVE TIPS TO THE BASE IN THE RANGE OF 0.030 INCH TO 0.150 INCH, AND THEREBY SLOPING RELATIVE TO SAID FACE IN THE SAME GENERAL DIRECTION AND FORMING A UNIT OF SLOPING, CLOSELY SPACED, PENETRATING MEMBERS ADAPTED TO PENETRATE A PLURALITY OF CLOSELY-SPACED SURFACE OPENINGS OF A MATERIAL OF THE CHARACTER AFOREDESCRIBED, THE SHORTEST SIDE OF THE RESPECTIVE PROJECTIONS OF SAID GROUP ALSO DEFINING FROM THE RESPECTIVE BASE TO THE RESPECTIVE TIP THEREOF A STRAIGHT LINE SLOPING IN THE SAME GENERAL DIRECTION AS SAID LONGITUDINAL AXES AND AT AN ACUTE ANGLE RELATIVE TO SAID FACE, WHEREBY A PULLING FORCE IN A DIRECTION ESSENTIALLY PARALLEL WITH SAID FACE AND AT RIGHT ANGLES TO SAID ROWS AND OPPOSITE TO SAID GENERAL DIRECTION ON THE PORTION OF MATERIAL OF THE AFORESAID CHARACTER PENETRATED BY SAID PROJECTIONS CAUSES SAID PORTION OF SAID MATERIAL TO BE FIRMLY AND DEEPLY SEATED ON SAID PROJECTIONS AND THEREBY FIRMLY GRIPPED ON SAID FASTENER STRUCTURE UNDER SAID PULLING FORCE, SAID GRIPPED PORTION OF SAID MATERIAL BEING QUICKLY RELEASABLE FROM SAID PROJECTIONS UPON RELEASE OF SAID PULLING FORCE.