| 摘要 |
<p>There is described a vacuum drum (7) adapted to transfer at least one label (2a, 2b) along a given path (P) around a rotation axis (A), comprising: a main body (9) delimited by an outer lateral surface (11) which is adapted to receive label (2a, 2b) to be transferred; and at least one first and one second port (10a, 10b; 10c) defined by surface (11); vacuum drum (7) comprises a selectively mountable first distributor (30, 30') configured for fluidly connecting, on the basis of the format of label (2a, 2b),: first second port (10a, 10b) to a first source (22) of vacuum at a first higher degree of depression, so that a suction action is exerted by first port (10a, 10b) on label (2a, 2b), and/or second port (10c) to a second source of vacuum a second lower degree of depression, so as to selectively prevent second port (10c) from exerting a suction action on label (2a, 2b).</p> |
