Manufacturing method and manufacturing equipment of composite sheet

A method of manufacturing a composite sheet that continuously supplies, to a sheet surface of a belt-shaped sheet that is transported continuously in a predetermined transporting direction, an elastic belt member while reciprocating the belt member in an intersecting direction that intersects the transporting direction, and thus bonds the belt member to the sheet surface of the belt-shaped sheet while continuously changing a bonding position of the belt member on the sheet surface in the intersecting direction, the method comprising:

• causing the belt member to surface contact with and bond to the sheet surface of the belt-shaped sheet, by supplying the belt-shaped sheet to an outer circumferential surface of a bonding roll that rotates in a direction along the transporting direction, and supplying the belt member via a guide member to a part of the belt-shaped sheet that is brought in contact with the outer circumferential surface of the bonding roll so that the belt member overlaps the part of the belt-shaped sheet, wherein the guide member has
• a reciprocating roller that reciprocates in the intersecting direction,
• a supply roller which is rotatable about a rotation axis and to which the belt member is supplied, and
• an oscillating arm;
• wrapping the belt member subsequently around the outer circumferential surface of the supply roller and the outer circumferential surface of the reciprocating roller, and leading the belt member to the belt-shaped sheet;
• and
• oscillating the supply roller so that the outer circumferential surface of the supply roller faces toward the reciprocating roller in accordance with a reciprocating motion of the reciprocating roller,
• wherein
• a wraparound angle of the belt member defined by a rotation angle of the reciprocating roller when the belt member is wrapped around the outer circumferential surface of the reciprocating roller is equal to or greater than 180 degrees,
• the supply roller and the oscillating arm oscillate in the intersecting direction about a support axis as a rotational center of the supply roller and the oscillating arm, and
• the support axis is tangential to the outer circumferential surface of the supply roller when viewed along the rotation axis of the supply roller.