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Thread: 4D idea

  1. 03-26-2015, 10:38 AM #1
    BOBLBE
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    4D idea

    Am responding to the 4D printing article and am sharing an idea. I am thinking of a hat where for rain or sun it could grow a brim. How could one do this?
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  2. 03-26-2015, 11:18 AM #2
    curious aardvark
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    you'd need a hinged brim that unfolded when wet and folded when dry.
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