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Plastic profiled strip forming helically wound tube using hinged flap for jointing
Plastic profiled strip forming helically wound tube using hinged flap for jointing
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机译:塑料异型带材成型螺旋缠绕管,使用铰接翼片进行连接
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摘要
A plastic profiled strip (10) is provided for producing helically wound tubes or pipes, the strip (10) having female and male joint formations (13, 14) extending along opposite longitudinal margins thereof and arranged so that upon spirally winding the strip into a tubular form, the joint formations (13, 14) can be interlocked to thereby lock adjacent windings of the strip together, the male joint formation (14) comprising a hinged flap (15) which is flexibly connected to the strip (10) for hinging movement between a disengaged or unlocked position displaced from the plane of the strip (10) and a locking position wherein it interlocks with the female joint formation (13) of an adjacent winding of the strip (10).
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