Filter sheet holder
Description
Filter holder for a coronavirus mask. Originally created for https://www.thingiverse.com/thing:4222563 . Having bought a roll of bulk anti-virus filter sheet, I have realized that the thin filter does not keep shape in the flow of air, deforms, and does not work anymore. This is why I made this insert, that forces it into a shape where a large area can be used. Instructions: * print two identical parts (they fit into eachother when rotated) * cut proper width of your filter * place one side of the filter at the edge and hold with your finger * with a dull knife, push the filter into the first hole * move your finger to the next blade and repeat * close the holder with the second part * insert the whole assembly into your respirator
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