Method and Machine for the Production of Logs of Web Material
AssigneeFabio Perini S.p.A.
InventorsMauro Gelli, Romano Maddaleni, Giovanni Nencioni
Life of this patent
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Abstract
The rewinding machine comprises: a winding system (1, 2, 3) and a feed path for a web material (N) towards said winding system. Along the feed path is a channel for insertion of the cores and an interruption member (23; 101) which acts on the web material.
Claims66
A rewinding machine for winding a web material (N) in logs (R), comprising:
- a path for feeding the web material towards a winding system (1, 2, 3);
- an interruption member (23;
- 101;
- 111;
- 201) to interrupt the web material at the end of winding of a log;
- a core feeder (19, 21) to insert winding cores (A1, A2) in succession in a channel (17) defined by a rolling surface (15) and a movable core feed member (13), arranged so that when a core is inserted in said channel (17) the web material (N) is between said core (A1, A2) and said feed member (13) and in contact with said feed member (13);
- characterized in that said interruption member is associated with said feed member (13) and positioned at least partly on the opposite side thereof with respect to said channel (17) to act on the web material (N) through said feed member (13).
Rewinding machine as claimed in one or more of the preceding claims, characterized in that said interruption member (23) is a suction member which applies a force on said web material, thus obstructing the feed thereof.
Rewinding machine as claimed in one or more of the preceding claims, characterized by glue application means for applying glue on said cores.
Rewinding machine as claimed in one or more of the preceding claims, characterized by blower nozzles (81, 83, 85) to facilitate winding of the free edge around the winding core.
Rewinding machine as claimed in one or more of the preceding claims, characterized in that the path of the cores is constructed and arranged so that each core rolls along said path far enough to transfer part of the glue previously applied on said core to a portion of web material which will form the final free edge of the log (R).
Rewinding machine as claimed in one or more of the preceding claims, characterized in that said interruption member comprises at least one diverter element which acts on the web material across said feed member, protruding into said channel.
Method for the production of logs of wound web material, comprising the following phases:
- feeding the web material to a winding system;
- winding a first log (R) of web material around a first winding core (A1);
- inserting a new winding core (A2) in a channel (17) defined between a rolling surface (15) and a movable core feed member (13) and feed said core along said channel, with the web material between said core and said feed member (13);
- interrupting the web material at the end of winding of said first log (R), forming a final free edge (Lf) of said first log and an initial free edge (Li) for winding of a second log (R);
- characterized in that said web material is interrupted by an interruption member (23;
- 101;
- 111;
- 201) which acts on the web material (N) along the channel (17) on the side of the feed member (13) and across it.
Method for the production of logs of wound web material, comprising the following phases:
- feeding the web material along a feed path to a winding system;
- winding a first log of web material around a first winding core;
- interrupting the web material at the end of winding of said first log, elongating the path of the web material between said first log and a pinching point of the web material to form a free final edge of said first log and a free initial edge for winding of a second log.
Rewinding machine for winding a web material in logs, comprising:
- a path for feeding the web material towards a winding system;
- and a core feeder to insert winding cores in succession towards said winding system;
- characterized in that it comprises, along said feed path, a diverter element positioned and controlled to elongate the path of the web material between one completed log and a pinching point of the web material.
Dependencies are inferred from the claim text.