| 摘要 |
My invention is a device to facilitate sanding concave and convex shapes more evenly on a belt sander. My invention raises the center of the sanding belt and provides a section of belt that has no backing support. The unbacked area of belt forms a variable concave sanding surface when the workpiece is held against it with varying degrees of pressure. The arched top of my invention provides a wide radius sanding surface for concave workpieces. The curvature of the arched top of my invention reduces the area of contact with the inner surface of the belt when in an unloaded or idling state and helps the belt and the belt lift accessory operate at lower temperatures. The dimensions of my invention may vary depending upon the particular host machine it is designed to fit. My invention is simple to mount and remove without the use of tools. My invention can be used in a variety of shop applications on wood, metal and plastics.
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