A method is described for obtaining a coreless roll (R) of web material with a first portion of web material forming an inner nucleus (R1) of said roll and a second portion of web material (R2) wound around the outside of said nucleus. The two portions (R1, R2) can be separated from one another and,...http://www.google.es/patents/US7992818?utm_source=gb-gplus-sharePatente US7992818 - Coreless roll of web material, machine and method for its production
Coreless roll of web material, machine and method for its production
