Patent ID: 8211256

Claim:
A method for producing a disposable worn article including a torso portion covering a torso of a wearer, and a crotch portion covering a crotch of the wearer, the method comprising: a step of forming stretched elastic sheet pieces from a continuous elastic sheet; a step of carrying a continuous web to be the torso portion in a longitudinal direction of the continuous web; a step of placing the elastic sheet pieces intermittently on the continuous web, with a stretch direction of the stretched elastic sheet pieces being aligned with the longitudinal direction; a step of bonding at least a part of opposite end portions of each of the elastic sheet pieces in the longitudinal direction to the continuous web by an adhesive without bonding an intermediate portion between the opposite end portions to the continuous web, during the placing step; an ultrasonic attachment step of applying a vibration energy on an overlap portion in which the intermediate portion of one of the elastic sheet pieces between the opposite end portions and the continuous web overlap with each other, thereby welding the intermediate portion to the continuous web, and forming a laminated stretchable sheet; a placement step of placing core portions, each of which forms the crotch portion, between adjacent one of the elastic sheet pieces on the laminated stretchable sheet; and a step of cutting off the laminated stretchable sheet between adjacent ones of the core portions and at the intermediate portion welded to the continuous web.