| 摘要 |
The present invention provides a retractable measuring tape having a blade with increased strength at the outer end of the blade. The measuring tape includes a housing for holding a retractable blade and a aperture through which the retractable blade extends. The retractable blade has an inner end affixed within the housing and an outer end having an attachment to prevent the outer end of said blade from entering the housing. The outer end of said blade member including a reinforcement material. The reinforcing materials include thermoplastic polymers, thermosetting polymers and metals. A preferred class of reinforcing materials are thermoplastic polymers such as: polyamides like nylons and aramids; polyesters like poly(ethylene terephthalate); acrylics; polycarbonates; polystyrenes; polysulfones and poly(vinyl chlorides). Another class of reinforcing materials includes thermosetting polymers: such as phenolics; epoxies; polyurethanes; and silicones. Yet another class of reinforcing materials includes ferrous and a non-ferrous metals such as: steel, aluminum and titanium. Lastly other reinforcing materials such as fiberglass and graphite may be used.
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