Abstract: Disclosed is an apparatus for forming coreless paper rolls. The apparatus includes an expansible mandrel that can be used in conjunction with an existing rewinder. The mandrel is segmented, with the segments expanding when the mandrel is loaded into the rewinder. While in the rewinder, a web of material, such as the type used to form register receipt rolls, is wound upon the mandrel. After a sufficient amount of material has been taken up, the mandrel is removed from the rewinder. Upon removal, the segments contract whereby the cross section of the mandrel is reduced and the roll can be removed. The result is a coreless roll of material.