Patent ID: 9649792
Date: 2017-05-16
CPC Classifications: A44B,B29C,B29K,B29L,B32B,Y10T

Claim:
1. A method of forming a longitudinally continuous sheet of pleated product, the method comprising: training a substrate about a first roll having an outer surface defining a circumferential groove between outer surface lands such that, as the substrate approaches a nip between the first roll and a second roll, passing the substrate through the nip in a machine feed direction with the first region disposed within the groove, thereby applying nip pressure to the second regions of the substrate in the nip; transferring the substrate to the second roll at the nip; and maintaining the transferred substrate against the second roll over a distance extending from the nip, over which distance the second regions of the substrate are supported by an outer surface of the second roll and the first region forms a pleat on a side of the substrate opposite the second roll.