Improved method for manufacturing a laminate having at least ione pleated lamina.

摘要

A method for producing a laminate having at least one pleated lamina is disclosed. The method uses an apparatus having two rolls (22, 24) defining a nip, with at least one of the two rolls having circumferentially oriented grooves (26). The laminae (14, 16) are forwarded through the rolls in face to face relation. One lamina is pleated and the pleats are transversely registered with the circumferential grooves of the grooved roll as the laminae pass through the nip. The laminae may be autogenously or adhesively joined to produce the unitary laminate.