| 摘要 |
The invention is directed to a unitary bundling strap having a head end portion and a tail end portion and an elongated strap body portion therebetween. The strap body portion is fabricated with a plurality of teeth extending within the surface thereof and the head end portion is provided with an aperture to permit the strap to be transversely passed therethrough as the strap is drawn about a plurality of articles to be bundled. A selective portion of the head end portion is permitted to rotate in a first direction to permit the passage of the toothed portion of the strap body portion through the head end portion aperture and by the rotation of the head end portion a second opposite direction, as by the attempted withdrawal of the strap or by the tension applied by the bundle about which the strap is placed or the natural tendency of the head end portion due to its design the strap is brought into locking engagement. The head end portion is specially constructed so that generally the portion of the head end portion above the base of the transverse head end portion aperture is able to rotate as a single unit during the passage of the strap through the aperture in the tightening mode then rotate oppositely into a locking mode with the application of forces to the strap in a reverse direction.
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