Machine and method for sealing the tail end of a log of web material
AssigneeFabio Perini S.p.A.
InventorsGraziano Mazzaccherini, Romano Maddaleni
Life of this patent
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Abstract
The machine for closing the tail end of logs of web material, includes an advancing path of the logs and, along the log advancing path, a tail end unwinding, positioning and sealing station. The tail end unwinding, positioning and sealing station includes an aperture that extends downwards from an inlet under the log advancing path. At least a first Coanda effect nozzle is placed at the inlet of the aperture, to generate a flow of air adapted to draw into the aperture the tail end of a log that is in the tail end unwinding, positioning and sealing station.
Claims23
-22. (canceled)
A machine for closing a tail end of a log of web material, comprising:
- a log advancing path;
- along the log advancing path, a tail end unwinding, positioning and sealing station comprising an aperture that extends downwards from an inlet under the log advancing path,
- wherein at least a first Coanda effect nozzle is placed at the inlet of the aperture, to generate a flow of air that is adapted to draw into the aperture the tail end of a log that is in the tail end unwinding, positioning and sealing station.
The method for closing a tail end of logs of wound web material, comprising steps of:
- moving a log along an advancing path to a tail end unwinding, positioning and sealing station;
- holding the log in the tail end unwinding, positioning and sealing station, unwinding the tail end from the log and inserting the tail end into an aperture located under the advancing path by an air jet from at least a first Coanda effect nozzle located at an inlet of said aperture;
- turning the log in the tail end unwinding, positioning and sealing station, until the tail end of the web material is in a pre-determined position;
- closing the tail end and moving the log out of the tail end unwinding, positioning and sealing station, along the advancing path.
A machine for closing a tail end of logs of web material, comprising:
- a log advancing path;
- along the log advancing path, a tail end unwinding, positioning and sealing station comprising an aperture that extends from an inlet under the log advancing path;
- first web material mechanical ply-bonding members and second mechanical ply-bonding members, set at a distance from each other along said aperture, under the log advancing path.
A method for closing a tail end of logs of wound web material, comprising steps of:
- moving a log along an advancing path to a tail end unwinding, positioning and sealing station;
- holding the log in the tail end unwinding, positioning and sealing station, unwinding the tail end from the log and inserting the tail end into an aperture located under the advancing path;
- turning the log in the tail end unwinding, positioning and sealing station, until the tail end of the web material is in a pre-determined position inside said aperture;
- generating by mechanical ply-bonding an intermediate fold along the web material unwound from the log, at a distance from the tail end approximately equal to a circumference of the log;
- rewinding the web material onto the log, keeping the log in the tail end unwinding, positioning and sealing station until the tail end is adjacent to the intermediate fold;
- attaching the tail end to the intermediate fold by mechanical ply-bonding;
- removing the log from the tail end unwinding, positioning and sealing station.
Dependencies are inferred from the claim text.