Rewinding machine, for the production of logs of web material and logs obtained
AssigneeFabio Perini S.p.A.
InventorMauro Gelli
Life of this patent
Estimating the term…
Abstract
The rewinding machine includes a winding system and a path for feeding a web material towards said the winding system. Along the feed path at least one suction member is positioned to temporarily obstruct feeding of the web material and cause interruption thereof at the end of winding of each log.
Claims52
A rewinding machine comprising a winding system, a feed path for feeding a web material towards said winding system, a counter surface along which said web material runs, and at least one suction member positioned along said feed path to temporarily obstruct feed of the web material and cause interruption thereof at an end of winding of each log, wherein said at least one suction member and said counter surface are constructed and arranged such that said suction member attracts said web material onto said counter surface to generate a friction between the web material and said counter surface which causes breakage of said web material by tearing.
A rewinding machine comprising a winding system, wherein said winding system is a surface winding system including a first winding roller and a second winding roller defining a nip therebetween;
- a feed path for feeding a web material towards said winding system;
- a counter surface along which said web material runs;
- and at least one suction member positioned along said feed path to temporarily obstruct feed of the web material and cause interruption thereof at an end of winding of each log;
- wherein said at least one suction member and said counter surface are constructed and arranged to generate a friction between the web material and said counter surface which causes breakage of said web material by tearing;
- and wherein said at least one suction member is arranged upstream of said nip with respect to a feed direction of said web material.
A rewinding machine comprising a winding system;
- a feed path for feeding a web material towards said winding system;
- a counter surface along which said web material runs, wherein said counter surface is a fixed surface;
- and at least one suction member positioned along said feed path to temporarily obstruct feed of the web material and cause interruption thereof at an end of winding of each log;
- wherein said at least one suction member and said counter surface are constructed and arranged to generate a friction between the web material and said counter surface which causes breakage of said web material by tearing.
A rewinding machine comprising a winding system, wherein said winding system is a surface winding system comprising a winding cradle;
- a feed path for feeding a web material towards said winding system;
- a winding core feeder constructed and arranged to feed winding cores into an insertion path towards said winding cradle, and positioned along said insertion path is at least one winding core feed member which moves forward at a speed substantially equal to a speed of the web material;
- a counter surface along which said web material runs;
- at least one suction member positioned along said feed path to temporarily obstruct feed of the web material and cause interruption thereof at an end of winding of each log;
- wherein said at least one suction member and said counter surface are constructed and arranged to generate a friction between the web material and said counter surface which causes breakage of said web material by tearing;
- and wherein said at least one winding core feed member comprises at least one flexible member running along said counter surface.
A rewinding machine comprising a winding system including a winding cradle;
- a feed path for feeding a web material towards said winding system;
- a counter surface along which said web material runs;
- at least one suction member positioned along said feed path to temporarily obstruct feed of the web material and cause interruption thereof at an end of winding of each log, wherein said at least one suction member and said counter surface are constructed and arranged to generate a friction between the web material and said counter surface which causes breakage of said web material by tearing;
- and a first winding roller around which at least one flexible member runs with which the web material fed to said winding cradle is in contact and in which said at least one suction member is combined with said flexible member, said suction member presenting said counter surface, the flexible member moving along said counter surface.
A rewinding machine comprising a winding system, a feed path for feeding a web material towards said winding system, a counter surface along which said web material runs, and at least one suction member positioned along said feed path to temporarily obstruct feed of the web material and cause interruption thereof at an end of winding of each log, wherein said at least one suction member and said counter surface are constructed and arranged to generate a friction between the web material and said counter surface which causes breakage of said web material by tearing, wherein said at least one suction member includes at least one aperture crosswise to a feed direction of the web material, wherein said at least one aperture communicates with a timed suction chamber which is structured for connection to a suction source, and wherein said timed suction chamber is structured for connection by an opening and closing member to a continuous suction chamber where a substantially continuous underpressure is maintained.
A rewinding machine comprising a winding system, a feed path for feeding a web material towards said winding system, a counter surface along which said web material runs, at least one suction member positioned along said feed path to temporarily obstruct feed of the web material and cause interruption thereof at an end of winding of each log, wherein said at least one suction member and said counter surface are constructed and arranged to generate a friction between the web material and said counter surface which causes breakage of said web material by tearing, and blower nozzles to facilitate winding of a free edge around a winding core, wherein said blower nozzles include at least one first set of blower nozzles and one second set of blower nozzles arranged upstream and downstream of a suction application area to the web material.
Method for producing logs of wound web material comprising
- feeding a web material along a feed path towards a winding system, a counter surface being arranged along said feed path and said web material sliding along said counter surface;
- winding a first log of the web material;
- and
- 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;
- wherein said interrupting of the web material is by timed suction which obstructs the feeding of the web material and generates a friction between the web material and said counter surface along which said web material slides, said friction causing breakage of said web material.
Method for producing logs of wound web material comprising
- feeding a web material to a winding system, wherein said winding system is a surface winding system comprising a winding cradle;
- winding a first log of the web material;
- 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, wherein said interrupting of the web material is by timed suction which obstructs the feeding of the web material and generates a friction between the web material and a counter surface, said friction causing breakage of said web material;
- feeding the web material through a nip formed between a first winding roller and a second winding roller;
- and
- applying said timed suction upstream of said nip with respect to a feeding direction of said web material.
Method for producing logs of wound web material comprising
- feeding a web material to a winding system;
- winding a first log of the web material;
- and
- 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, wherein said interrupting of the web material is by timed suction which obstructs the feeding of the web material and generates a friction between the web material and a counter surface, said friction causing breakage of said web material, wherein said counter surface is fixed.
Dependencies are inferred from the claim text.