METHOD FOR SIMULTANEOUSLY IMPRINTING A PATTERN AND BONDING CELLULOSE WEBS USING ULTRASONIC ENERGY

摘要

A method of simultaneously laminating and imprinting a pattern on a web formed substantially from cellulosic material, using at least two plies or layers (10, 14), and superposing the plies and passing the plies past an ultrasonic bonder (32) and a patterned anvil roll (34) to simultaneously produce either substantially imprinted patterned and bonded areas over the superposed plies or substantially patterned perforations and bonded areas over the superposed plies.