Patent ID: 8083880

Claim:
A method for producing a trunk-type or bloomers-type wearing article comprising a main body including a front part and a back part spaced along a forward-and-backward direction, each of the front and back parts having a waist edge and opposite widthwise end portions along a widthwise direction transverse to the forward-and-backward direction, the waist edges opposed to each other along the forward-and-backward direction, and a crotch part coupling the front and back parts, the crotch part having opposite widthwise sides spaced apart along the width direction and lying between a first line passing opposite points where the widthwise end portions of the front part and the widthwise sides of the crotch part join each other respectively and a second line passing opposite points where the widthwise end portions of the back part and the widthwise sides of the crotch part join each other respectively, the space between the front and back parts being shorter at a widthwise middle portion of the crotch part than at both widthwise sides of the crotch part, the crotch part forming an inverted fork shape upon wearing the trunk-type or bloomers-type wearing article so that the widthwise sides of the crotch part are below the widthwise middle portion of the crotch part and so that the widthwise sides of the crotch part define parts of the legs of the trunk-type or bloomers-type wearing article, comprising the steps of: cutting a web to make leg openings to thereby form the crotch part having a length along the forward-and-backward direction smaller than a length between the pair of waist edges at a ratio of 1:15 to 1:2, attaching elastic members for waist to the web under a stretched state, providing a shirring producing element in the crotch part under a stretched state along a direction intersecting with a feeding direction of the web, the shirring producing element being provided only in a substantially widthwise middle portion of the crotch part between the widthwise sides of the crotch and shortening a space between the front and back parts to produce shirring, a length of the shirring producing element in the forward-and-backward direction being smaller than a length of the crotch part in the forward-and-backward direction, folding the web in two along the feeding direction of the web with the crotch part as a boundary and placing the front and back parts one over the other, and applying side sealing between adjacent crotch parts and cutting the sealed portion to complete a single wearing article.