Conveyor device for a corrugated web, corrugated board manufacturing line including the conveyor device, and method

A corrugated web manufacturing line, comprising:

• at least one single facer;
• a double facer;
• a bridge extending from the at least one single facer to the double facer, adapted to convey a single face corrugated web from the at least one single facer to the double facer;
• a conveyor device, to convey a single face corrugated web from the at least one single facer to the bridge;
• and
• a corrugated web threading device;
• wherein the conveyor device comprises:
• a lower guide roller, around which the single face corrugated web is guided;
• and an upper pinching and conveyance nip formed by a pair of nip members in pressure contact with one another, at least one of said pair of nip members being motor-driven;
• the upper pinching and conveyance nip being configured to pull the single face corrugated web upwards from the lower guide roller;
• and wherein said corrugated web threading device is adapted to thread a leading portion of the single face corrugated web into the upper pinching and conveyance nip.

A method of operating a corrugated board manufacturing line comprising steps as follows:

• continuously manufacturing a single face corrugated web in a single facer;
• pulling the single face corrugated web from the single facer onto a bridge by a conveyor device, said conveyor device comprising:
• a lower guide roller;
• and an upper pinching and conveyance nip formed by a pair of nip members in pressure contact with one another, at least one of said pair of nip members being motor-driven;
• wherein the single face corrugated web is lifted from the single facer to the bridge by action of at least said pair of nip members;
• advancing the single face corrugated web on the bridge towards a double facer;
• and
• wherein said method further comprises threading a leading portion of the single face corrugated web through the upper pinching and conveyance nip by a web threading device.