| 摘要 |
A method of manufacturing a cushion material by welding under heat a first layer 1 to an adjoining second layer 2 at necessary portions of the latter by use of a welding-member 5 having a plurality of pressure applying projections 5a. The material of the second layer is deformed and molten and flows at temperature higher than those of the material of the first layer. In the method, the surface portions of the first layer not engaged by the welding member and lying closer to the welding member and/or the welding member itself are cooled by cooling gas e.g. from jet nozzles 10a on pipes 10 thereby welding the first layer to the second layer without giving rise to any appreciable thermal change on the surface of the first layer except the portions engaged by the welding member. <IMAGE> |
