| 摘要 |
A sweeping member 5, together with a plate 2 which is to be worked and lies on a layer 4 of resilient material of a table leaf 3, is pressed a certain distance, the depth of impression, into the resilient layer 4. Subsequently, the sweeping member 5 is slid substantially parallel to the supporting leaf 3 over the plate 2 in the direction of the arrow P1, the resilient layer 4 being continuously impressed, thereby causing the plate material 2 to deform at the site of the zone of impression. By moving the sweeping member 5 continuously over the plate 2, that portion of the plate 2 which has already been swept will begin to display a curvature having a certain radius R. By varying the depth of impression, the plate material 2 can be provided locally with different radii of curvature. <IMAGE>
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