Method and machine for the production of logs of wound web material
AssigneeFabio Perini S.p.A.
InventorsRoberto Morelli, Mauro Gelli
Life of this patent
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Abstract
A rewinding machine is described including: a path for feeding the web material towards a winding system; interruption members to interrupt the web material at the end of winding of a log; a core insertion channel, defined by a rolling surface and a movable member; a core feeder to insert winding cores in succession in the channel; an electrostatic device positioned along the channel to electrostatically charge the winding cores and/or the web material thus causing, due to the electrostatic charges, reciprocal adhesion of the core and initial free edge of the web material obtained by interruption of the material at the end of winding of each log.
Claims32
A rewinding machine comprising:
- a path for feeding a web material towards a winding system;
- an interruption member to interrupt the web material at an end of winding of a log;
- a core insertion channel, said channel being defined by a stationary rolling surface and a movable member including a series of parallel spaced apart flexible members entrained around at least two rollers;
- a core feeder to insert winding cores in succession in said channel;
- and
- an electrostatic device to electrostatically charge at least one of the web material and the winding cores to provide, due to electrostatic charges, reciprocal adhesion of each core and an initial free edge of the web material obtained by interruption of the web material at an end of winding of each log,
- wherein said electrostatic device includes at least one charge bar connected to a voltage source, said at least one charge bar being positioned along said channel, and said at least one charge bar is constructed and arranged within a closed path defined by said flexible members such that electrostatic charges are applied by said at least one charge bar to at least one of said web material and each said core after the core has come into contact with the web material to provide said reciprocal adhesion between said each core and said initial free edge of the web material.
A method for producing logs of wound web material comprising:
- feeding a web material to a winding system;
- winding a first log of web material around a first winding core;
- interrupting the web material at an end of winding of said first log forming a final free edge of said first log and an initial free edge for winding of a second log;
- and
- adhering said initial free edge to a second core by application of electrostatic charges which produce reciprocal attraction between said second core and said initial free edge,
- wherein said application of said electrostatic charges is after the second core has come into contact with the web material;
- and said electrostatic charges are provided to at least one of said web material and each core along a core insertion channel defined by a stationary rolling surface and within a closed path defined by a movable member so as to provide said reciprocal attraction between said second core and said initial free edge.
A method for producing logs of wound web material comprising:
- feeding a web material to a winding system;
- winding a first log of web material around a first winding core;
- interrupting the web material at an end of winding of said first log forming a final free edge of said first log and an initial free edge for winding of a second log;
- and
- adhering the initial free edge to a second core by application of electrostatic charges which produce reciprocal attraction between said second core and said initial free edge,
- wherein cores are inserted in an insertion channel defined by a stationary rolling surface and a movable member including a series of parallel spaced apart flexible members entrained around at least two rollers, and
- wherein said application of the electrostatic charges occurs along said channel and within a closed path defined by said flexible members at a point so as to provide said reciprocal attraction between one said core and said initial free edge.
Dependencies are inferred from the claim text.