| 摘要 |
<p>The present tools are generally similar in appearance to a carpet rake or brush. Each has a multiplicity of closely spaced parallel, fairly stiff nylon bristles in two parallel rows along the front and back of an elongated head. In one form, the nylon bristles are molded on opposite sides of a one-piece flat rectangular nylon carrier strip that is flexed along its center line and set in a channel in the head so that one row of bristles extends from one side of the channel and the other row from the other side. In another form, all of the nylon bristles are separate filaments of the requisite length flexed to a generally U-shape to provide with each bristle a vertical tine in the front row and another vertical tine in the rear row. The bristles are seated in the channel and held therein tightly by a radially compressed cylindrical strip that is oversize in relation to the channel. The channel entrance has rounded edge portions which serve the double purpose of facilitating assembly and also eliminating sharp corners where the bristles are flexed relative to the head in the normal use of the tool, thereby reducing wear.</p> |
