| 摘要 |
The apparatus and method of supplying pulverized insulative material within an existing wall structure which already has a pad of insulative material located within the wall. An access opening or hole is provided through the exterior wall surface. The tool includes a straight elongated tubular member which has a helical groove adjacent the outer end of the tool, the helical groove terminating in a cutting edge. The cutting edge portion of the tool is inserted through the access opening and rotated against the pad of insulation thereby cutting such until the cutting edge of the tool is located directly adjacent the backing layer of material of the pad of insulation. At this time, the tool is then rotated approximately 360 degrees causing the tool to penetrate the backing layer of material and locating the backing layer of material within the helical groove. By pulling outward slightly the backing layer is spaced from the inner wall. The backing layer is then punctured with a separate instrument. At this time insulation may be blown by air pressure through the tool to be deposited within the interior opening of the wall structure.
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