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US 8,186,612 B2Granted
Method and device for gluing the free edge of a log of web material in a rewinding machine
AssigneeFabio Perini S.p.A.
InventorsMauro Gelli, Romano Maddaleni, Graziano Mazzaccherini
Life of this patent
Estimating the term…
Abstract
A rewinding machine for producing logs of web material is described which includes a winding unit; a feed path of the web material towards the winding unit; a severing device to sever the web material upon completion of winding each log; and a glue dispenser to apply a glue to the web material. The machine also includes a diverter member disposed and controlled to temporarily divert the web material towards the glue dispenser.
Claims11
A method for producing logs of web material, comprising:
- feeding a web material along a feed path;
- arranging a glue dispensing member on a first side of said feed path;
- winding an amount of the web material in a log;
- arranging a diverter roller on a second side of said feed path, said feed path extending between said glue dispensing member and said diverter roller;
- temporarily diverting the feed path of the web material towards said glue dispensing member to apply glue to the web material;
- after having applied said glue, and upon completion of winding a log, severing the web material forming a final free edge of a wound log and an initial free edge to start winding of a subsequent log, wherein said severing of the web material is controlled such that said glue is applied on the final free edge of said wound log forming a glued tail end;
- winding said glued tail end on said wound log to seal said wound log;
- and
- further including controlling said diverter roller to perform a rotation at an end of a winding cycle of each log and to remain inoperative during winding of said each log.
6 more elements
A rewinding machine for producing logs of web material, comprising:
- a winding unit;
- a feed path of the web material towards said winding unit;
- a severing device to sever the web material upon completion of winding each log to generate a tail end of said log and a leading end to start winding of a subsequent log;
- a glue dispenser to apply glue to the web material;
- a rotatable diverter roller with a radial projection, arranged in front of said glue dispenser, the feed path of the web material passing between said glue dispenser and said diverter roller and said diverter roller being arranged to temporarily divert the web material towards said glue dispenser, wherein said diverter roller is further arranged to perform a rotation at an end of a winding cycle of said each log and to remain inoperative during winding of said each log;
- wherein said diverter roller and said severing device are arranged and adapted to apply said glue on a portion of said web material before severing said web material such that said glue is applied on said tail end of said log so that said glue serves to adhere said tail end on said log.
3 more elements
Dependencies are inferred from the claim text.