Segmented vacuum roll

Abstract

A segmented vacuum roll comprising an inner assembly on which a plurality of cylindrical sleeve tubes (2a, 2b, 2c) having apertures over their circumference are rotatably and coaxially mounted side by side, each of said sleeve tubes being individually rotatable and one or several first chambers (9a, 9b, 9c) formed in said inner assembly and partly defined by a first portion of circumference of said sleeve tubes, said inner assembly comprising linking channels (6a, 6b, 6c) for linking a vacuum source to said chambers so that said first portion of circumference of said sleeve tubes may be submitted to vacuum. Said inner assembly comprises an inner tube (3), at least one outer tube (5a, 5b, 5c) surrounding said inner tube and a plurality of longitudinal walls extending between said inner tube and said outer tube so as to form longitudinal channels (6a, 6b, 6c).

Dependencies are inferred from the claim text.