A method includes producing an elastic strip material (12) by sandwiching an elastic member (4) between two webs (10, 11) under a stretched state in the longitudinal direction of the webs (10, 11), halving the elastic strip material (12) in the widthwise direction so that protrusions (12a) and recesses...http://www.google.es/patents/US7407557?utm_source=gb-gplus-sharePatente US7407557 - Method for producing disposable wearing article
