Now that the Dunlop Welsh rim is slightly modified by the flattening of the previously circular edges to an elliptical section, there is a broader surface for the edges of the cover to take firm bold of the rim. It is this shape which allows the outer cover to be put on and taken off without mechanical asssistance, and to remain on, when the inner tube is inflated, with perfect security.
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https://paperspast.natlib.govt.nz/periodicals/NZT19001129.2.57
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New Zealand Tablet, Volume XXVIII, Issue 48, 29 November 1900, Page 27
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71Untitled New Zealand Tablet, Volume XXVIII, Issue 48, 29 November 1900, Page 27
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