| 摘要 |
<p>Spiral wrapped tubing for use in a maple sap vacuum system. Flexible tubing is covered with a spiral wrap in such a manner that the flexible tubing still maintains its flexibility for tight bends. The single spiral wrapped tube typically has a clear outer coating. The spiral wrap can be applied in several ways. The first criteria is the number of spirals being applied to a tube, in one embodiment, a single spiral is shown, but it should be appreciated that multiple spirals of any number can be used as desired. Additionally, the width of the spirals can be adjusted as well. After wrapping, the exterior can be coated or left un-coated. The spacing between each spiral can also be increased or decreased in size, which effects weight, protection, and flexibility.</p> |
