| 摘要 |
<p>A roll of the type which is used in paper machines has an inner roll body provided with an outer covering made up of a series of elongated strip portions which circumferentially surround the inner roll body while being distributed axially therealong and engaging each other. These strip portions are welded to each other and also may be welded to the inner roll body. The welding of the strip portions is carried out by way of an electron beam type of welding which can be oriented so as to achieve one or more of a number of different types of weld connections between the successive strip portions and, if desired between the strip portions and the inner roll body. Where the strip portions form part of an elongated strip which is helically wound onto the inner roll body, the welding by way of the electron beam can take place simmultaneously with the winding of the strip onto the roll body, and by suitable controls the welding can be continuous welding or the welding may be applied at predetermined intervals to provide a discontinuous type of welding.</p> |
