| 摘要 |
A rasp is formed for removing material at a cut edge of a structure, such as drywall cut to size. Unlike prior drywall rasps, the rasp of the invention is formed with a rigid, channel-shaped grip defining a generally U-shaped, downwardly facing, concave inner channel surface. A rectangular section of expanded metal that forms a grid with a multiplicity of grid openings delineated from each other by a lattice of intervening metal strips is placed into the channel-shaped backing or grip. Lips at the lower extremities of the channel walls are bent upwardly and inwardly to clamp the sheet of expanded metal against the inner surface of the grip. The sheet of expanded metal is thereby permanently secured against the inner surface of the grip. The sheet of expanded metal is bent to conform to the interior surface of the grip. The channel-shaped structure of the rasp is then run along the cut surface of a structure to be finished so as to abrade away material therefrom. Because the rasping element is disposed against the concave, channel-shaped, inner surface of the grip, there is a minimal likelihood of accidental contact between the expanded metal abrading element and anything other than a narrow edge of sheet material purposely inserted into the channel-shaped structure of the rasp. The rasp thereby greatly reduces the likelihood of accidental injury to the user.
|
