Method and device for the production of rolls of web material without a winding core
AssigneeFabio Perini S.p.A.
InventorGuglielmo Biagiotti
Life of this patent
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Abstract
A surface rewinding machine for the production of rolls of wound web material is described. The machine comprises: a winding cradle (1, 3, 5) for winding the web material and sequentially forming rolls (R) of wound web material; an insertion device (25) for inserting sequentially, into said winding cradle, winding spindles (M1; M) on which the rolls are formed; an insertion path for the spindles inside the winding cradle. A suction system (51) which follows the spindles along at least one portion of the insertion path so as to produce a vacuum inside the spindles is also envisaged.
Claims32
A surface rewinding machine for the production of rolls of wound web material, comprising a winding cradle for winding web material and sequentially forming rolls of wound web material;
- an insertion device for sequentially inserting, into said winding cradle, winding spindles having a wall permeable to air on which said rolls are formed;
- an insertion path for introducing said spindles into said winding cradle;
- and a movable suction system which is controlled such as to follow said spindles along at least one portion of said insertion path so as to produce a vacuum inside said spindles.
A method for producing rolls of wound web material, without a winding core, comprising the steps of:
- winding with a surface winding action a portion of web material of predetermined length around a winding spindle for forming a roll;
- and extracting said winding spindle from said roll, characterized by:
- providing suction holes on said spindle;
- providing at least one suction means cooperating with said spindle so as to produce a vacuum inside said spindle;
- maintaining said vacuum in said spindle while said spindle is displaced along an insertion path towards a winding cradle, moving said suction means along said insertion path;
- and causing a leading portion of said web material to adhere to said spindle by means of said vacuum inside said spindle.
Dependencies are inferred from the claim text.