Perforating apparatus of a web, perforating process and production machine
AssigneeFameccanica.Data S.p.A.
InventorGabriele Sablone
Life of this patent
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Abstract
A perforating apparatus for perforating a web capable of making at least one plurality of holes in a zone of the web in a precise way and without imperfections or lacerations in the web. The present invention also relates to a process for perforating the web capable of making at least one plurality of holes in a zone of the web in an efficient way and without snags occurring. The present invention also relates to a machine for producing sanitary absorbent articles comprising at least one perforating apparatus.
Claims15
A perforating apparatus for perforating at least one web advancing along an advancement path at an advancing velocity, comprising:
- at least one first deformation member provided with a plurality of openings and at least one second deformation member provided with a plurality of protruding elements,
- wherein said first deformation member and said second deformation member are configured to position themselves at least in a tracking position,
- wherein said first deformation member and said second deformation member are placed on opposite sides of said advancement path and facing each other, and to position themselves in a coupling position downstream of the tracking position relative to the advancement path,
- wherein said protruding elements are coupled with said openings orthogonally to said advancement path to make, in use, a plurality of holes in a zone of said web, and
- wherein said first deformation member and said second deformation member, in said tracking position and in said coupling position, are configured to advance along a portion parallel to said advancement path at said advancing velocity, such that the first and second deformation members move in a same direction and at a substantially same speed as the at least one web in both the tracking position and coupling position so as to make said plurality of holes with substantially zero relative velocities, at least along said advancement path, between said first deformation member and said web and between said second deformation member and said web.
A process for perforating at least one web, comprising:
- advancing said web along an advancement path at an advancing velocity;
- positioning at least one first deformation member provided with a plurality of openings and at least one second deformation member provided with a plurality of protruding elements in a tracking position, wherein said first deformation member and said second deformation member are placed on opposite sides of said advancement path and facing each other facing towards two opposite surfaces of said web;
- advancing said first deformation member and said second deformation member along a portion parallel to said advancement path at said advancing velocity to a coupling position, so that relative velocities, at least along said advancement path, between said first deformation member and said web and between said second deformation member and said web are substantially zero;
- positioning said first deformation member and said second deformation member in the coupling position, wherein said plurality of protruding elements are coupled with said plurality of openings orthogonally to said advancement path with said web interposed between them to make a plurality of holes in a zone of said web, while said first deformation member and said second deformation member advance at said advancing velocity along a portion parallel to said advancement path so that said relative velocities remain substantially zero,
- wherein the first and second deformation members move in a same direction and at a substantially same speed as the at least one web in both the tracking position and coupling position.
Dependencies are inferred from the claim text.