System for fabricating corrugated board

A system for correcting warp of a corrugated board sheet fabricated by a corrugated-board fabrication machine (1), comprising:

• warp status information obtaining means (6, 6A-6H, 7, 7A, 7B, 8, 8A-8H, 240a, 240b, 241a, 241b) for obtaining warn status information concerning status of the warp of the corrugated board sheet fabricated by the corrugated-board fabrication machine (1);
• running-state information obtaining means (5, 5A-5H) for obtaining running state information concerning a running state of the corrugated-board fabrication machine (1);
• control variable calculating means (4, 4A-4H) for calculating a control variable of a particular control factor that affects the warp of the corrugated board sheet and that is one among control factors used to control the corrugated-board fabrication machine (1) based on the warp status information of the corrugated board sheet and the running state information of the corrugated-board fabrication machine (1);
• and
• control means (5, 5A-5H) for controlling the particular control factor using the control variable calculated by said control variable calculating means (4, 4A-4H), wherein:
• the status of the warp concerns warp of the corrugated board sheet in a direction across the width of the corrugated board sheet;
• and
• the particular control factor is a control factor that affects a moisture content of a bottom liner (20) or a top liner (23).

A system for correcting warp of a corrugated board sheet, fabricated by a corrugated-board fabrication machine (1), comprising:

• warp status information obtaining means (6, 6A-6H, 7, 7A, 7B, 8, 8A-8H, 240a, 240b, 241a, 241b) for obtaining warp status information concerning status of the warp of the corrugated board sheet fabricated by the corrugated-board fabrication machine (1);
• running-state information obtaining means (5, 5A-5H) for obtaining running state information concerning a running state of the corrugated-board fabrication machine (1);
• control variable calculating means (4, 4A-4H) for calculating a control variable of a particular control factor that affects the warn of the corrugated board sheet and that is one among control factors used to control the corrugated-board fabrication machine (1) based on the warn status information of the corrugated board sheet and the running state information of the corrugated-board fabrication machine (1);
• and
• control means (5, 5A-5H) for controlling the particular control factor using the control variable calculated by said control variable calculating means (4, 4A-4H), wherein:
• the status of the warp concerns twist warp of the corrugated board sheet;
• and
• the particular control factor is a control factor that affects a distribution of tension acts upon a bottom liner (20) or a top liner (23) in the direction of travel of the corrugated board sheet, which distribution concerns a direction across the width of the corrugated board sheet.

A system for correcting warp of a corrugated board sheet fabricated by a corrugated-board fabrication machine (1), comprising:

• warp status information obtaining means (6, 6A-6H, 7, 7A, 7B, 8, 8A-8H, 240a, 240b, 241a, 241b) for obtaining warp status information concerning status of the warp of the corrugated board sheet fabricated by the corrugated-board fabrication machine (1);
• running-state information obtaining means (5, 5A-5H) for obtaining running state information concerning a running state of the corrugated-board fabrication machine (1);
• control variable calculating means (4, 4A-4H) for calculating a control variable of a particular control factor that affects the warp of the corrugated board sheet and that is one among control factors used to control the corrugated-board fabrication machine (1) based on the warp status information of the corrugated board sheet and the running state information of the corrugated-board fabrication machine (1);
• control means (5, 5A-5H) for controlling the particular control factor using the control variable calculated by said control variable calculating means (4, 4A-4H);
• and
• control factor selecting means (3, 3A-3H, 4, 4A-4H) for selecting at least one particular control factor from a plurality of particular control factors that affect the warp of the corrugated board sheet in accordance with the warp status information of the corrugated board sheet and an influence of each of said plurality of particular control factors on the warp,
• said control variable calculating means (4, 4A-4H) calculating a control variable of the particular control factor selected by said control factor selecting means (3, 3A-3H, 4, 4A-4H),
• said control means (5, 5A-5H) controlling the selected particular control factor using the control variable calculated by said calculating means (4, 4A-4H),
• wherein the status of the warp concerns warp of the corrugated board sheet in a direction across the width of the corrugated board sheet;
• and
• the particular control factor is a control factor that affects a moisture content of a bottom liner (20) or a top liner (23).

A system for correcting warp of a corrugated board sheet fabricated by a corrugated-board fabrication machine (1), comprising:

• warp status information obtaining means (6, 6A-6H, 7, 7A, 7B, 8, 8A-8H, 240a, 240b, 241a, 241b) for obtaining warp status information concerning status of the warp of the corrugated board sheet fabricated by the corrugated-board fabrication machine (1);
• running-state information obtaining means (5, 5A-5H) for obtaining running state information concerning a running state of the corrugated-board fabrication machine (1);
• control variable calculating means (4, 4A-4H) for calculating a control variable of a particular control factor that affects the warp of the corrugated board sheet and that is one among control factors used to control the corrugated-board fabrication machine (1) based on the warp status information of the corrugated board sheet and the running state information of the corrugated-board fabrication machine (1);
• control means (5, 5A-5H) for controlling the particular control factor using the control variable calculated by said control variable calculating means (4, 4A-4H);
• and
• control factor selecting means (3, 3A-3H, 4, 4A-4H) for selecting at least one particular control factor from a plurality of particular control factors that affect the warp of the corrugated board sheet in accordance with the warp status information of the corrugated board sheet and an influence of each of said plurality of particular control factors on the warp,
• said control variable calculating means (4, 4A-4H) calculating a control variable of the particular control factor selected by said control factor selecting means (3, 3A-3H, 4, 4A-4H),
• said control means (5, 5A-5H) controlling the selected particular control factor using the control variable calculated by said calculating means (4, 4A-4H),
• wherein the status of the warp concerns twist warp of the corrugated board sheet, and
• the particular control factor is a control factor that affects a distribution of tension acts upon a bottom liner (20) or a top liner (23) in the direction of travel of the corrugated board sheet, which distribution concerns a direction across the width of the corrugated board sheet.