Folding, or interfolding, unit of a web, or sheet, of paper in a paper converting machine
AssigneeKöRber Tissue Fold S.R.L.
InventorsDaniele DAMIANI, Sergio LOMBARDI
Life of this patent
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Abstract
Folding or interfolding unit of a web, or sheet, of paper, comprising a first and a second folding or interfolding roll, of a web, or sheet, of paper, configured to fold or interfold, the web or sheet of paper according to a predetermined folding or interfolding configuration, at a folding or interfolding zone arranged between the first and the second folding or interfolding roll. The folding or interfolding unit comprise, furthermore, a first and a second plurality of detaching fingers configured to cause the web or sheet of paper to be detached from the external surface of the respective folding or interfolding roll.
Claims26
A folding or interfolding unit of a web, or sheet, of paper, comprising:
- a first and a second folding or interfolding roll of a web or sheet of paper configured to fold or interfold said web or sheet of paper according to a predetermined folding or interfolding configuration at a folding or interfolding zone arranged between said first and said second folding or interfolding roll;
- a first and a second plurality of detaching fingers configured to cause said web or sheet of paper to be detached from an external lateral surface of the respective folding or interfolding roll;
- a first and a second actuation group configured, respectively, to cause a back-and-forth oscillatory motion of said first and second plurality of detaching fingers towards/from said folding or interfolding zone, in such a way to cause a respective web or sheet of paper to be detached, respectively, from said first and second folding or interfolding roll, said folding or interfolding unit being characterized in that said first and second actuation group are, furthermore, configured to postpone or anticipate said oscillatory motion, respectively, of said first and of said second plurality of detaching fingers with respect to a predetermined reference oscillatory motion, in such a way to delay or anticipate, the instant (tr) in which said first and second pluralities of detaching fingers are arranged to cause said web or sheet of paper to be detached, respectively, from said first folding roll and from said second folding roll.
A method for folding or interfolding, a web or sheet of paper in a paper converting machine comprising the steps of:
- feeding at least one web or sheet of paper along an advancing direction;
- folding, or interfolding, said web or sheet of paper at a predetermined folding or interfolding zone, of a paper converting machine, said folding or interfolding step, being carried out by a first and a second folding or interfolding roll at a folding or interfolding zone, defined between them;
- detaching by a first and a second plurality of detaching fingers said web or sheet of paper from the external lateral surface of the respective folding or interfolding roll, said detaching step being carried out causing a back-and-forth oscillatory motion of said first and second plurality of detaching fingers towards/from said folding or interfolding zone;
- said method being characterized in that an adjustment step is, furthermore, provided for adjusting the phase between said first and second pluralities of detaching fingers and said first and second folding or interfolding rolls, respectively, said adjustment step being arranged to delay or anticipate, said oscillatory motion of said first and second plurality of detaching fingers, in particular with respect to a predetermined reference oscillatory motion, in such a way to postpone or anticipate, at least the instant (tr) in which said first and second pluralities of detaching fingers are arranged to cause the detachment of said web or sheet of paper, respectively, from said first and from second folding or interfolding roll.
Dependencies are inferred from the claim text.