Abstract A strapping fastener for holding twisted ends of a length of plastic strapping around a bundle of electrical conductors is formed of a rectangular parallelopipedal block of electrically insulating plastic material having two through-holes for the strapping and a cross slot for twisted strapping ends. The plastic strapping is generally rectangular in section and the through-holes in the fastener are parallel and of slightly larger section dimension to accommodate the strapping fed therethrough without twisting. The cross slot is in one face of the fastener block extending perpendicular to the through-holes so that the twisted ends of the plastic strapping will be held in their twisted position thereby preventing the strapping from slipping out of the fastener. The fastener is adapted to be used in a fastening system using an apparatus as disclosed in U. S. Pat. No. 3,633,633.
A plastic fastener for holding plastic strapping (S) of rectangular section (Ss) by twisted ends (Se) thereof, the fastener comprising: a generally rectangular parallelopipedal shaped block (210) of plastic electrically insulating material, only a pair of spaced parallel through holes (212, 214) extending completely through the block from one surface (216) to an opposite surface thereof (218), the through holes being rectangular in plan (FIG. 4) having a length (Tl) and width (Tw) complementary to and just slightly larger than the rectangular section of the plastic strapping, the through holes being spaced apart a distance (Td) greater than their width (Tw), a cross slot (220) in one surface of the block extending transverse to and across the length of the through holes intermediate such length, the cross slot extending completely across the surface of the block (Sl), the cross slot having a width (Sw) substantially less than the length (Tl) of the rectangular plan of one through hole, and a depth (Sd) greater than the width (Tw) of the rectangular plan of one through hole.
Claim 2
Dependent Claim
175 words
A plastic fastener for holding plastic strapping (S) of rectangular section (Ss) by twisted ends (Se) thereof, the fastener comprising: a generally rectangular parallelopipedal shaped block (210) of plastic electrically insulating material, only a pair of spaced parallel through holes (212, 214) extending completely through the block from one surface (216) to an opposite surface thereof (218), the through holes being rectangular in plan (FIG. 4) having a length (Tl) and width (Tw) complementary to and just slightly larger than the rectangular section of the plastic strapping, the through holes being spaced apart a distance (Td) greater than their width (Tw), a cross slot (220) in one surface of the block extending transverse to and across the length of the through holes intermediate such length, the cross slot extending completely across the surface of the block (Sl), the cross slot having a width (Sw) substantially less than the length (Tl) of the rectangular plan of one through hole, and a depth (Sd) greater than the width (Tw) of the rectangular plan of one through hole.
Claim 3
Dependent Claim
48 words
A plastic fastener as in claim 1 wherein the edges of the through holes at the surface of the block opposite the cross slot are tapered so that entrance to the through holes at this surface of the block is larger than the plan of the through holes.