Apparatus and method for rotary bonding

摘要

An apparatus (10) and method for bonding at least two continuously moving substrate webs (12,14) together is disclosed. The apparatus (10) comprises a rotatable bonding roll (20) which is located adjacent the substrate webs (12,14) and configured to rotate about a bonding axis (22). A rotatable anvil roll (40) has an anvil surface (42) and is configured to rotate about an anvil axis (44) to press the substrate webs (12,14) against an outer peripheral bonding surface (24) of the bonding roll (20) thereby bonding the substrate webs (12,14) together. The anvil roll (40) is pivotally connected to a pivotal support mechanism (50) which is configured to maintain the anvil surface (42) in a substantially parallel relationship with the bonding surface (24). The pivotal support mechanism (50) is configured to allow the anvil roll (40) to pivot such that the anvil roll (40) maintains a substantially constant force on the bonding surface (24) of the bonding roll (20) across the width of the anvil roll (40). $$