System for manufacturing bonded sheet material

A system for manufacturing a bonded sheet material by bonding various types of sheet members together after separately heating said sheet members through the use of individual sheet member heater, said system comprising:

• bonding device to bond said sheet members together,
• moisture content detector provided for at least one of said sheet members to detect a moisture content of said sheet member or a parameter correlating with said moisture content;
• controller to control said sheet member heater on the basis of detection information from said moisture content detector so that the moisture content approaches a predetermined optimum moisture content;
• and
• decision device to make a decision as to whether or not a deviation between the optimum moisture content and a moisture content detected by said moisture content detector is below a predetermined value,
• said controller comprises:
• first control element to feedback control said sheet member heater when said decision device makes the decision that said deviation is equal to or below a predetermined value;
• and
• second control element to feedforward control said sheet member heater when said decision device makes the decision that said deviation is more than said predetermined value.

A system for manufacturing a bonded sheet material by bonding a first sheet member and a second sheet member together, said system comprising:

• first sheet member heater to heat said first sheet member,
• second sheet member heater to heat said second sheet member,
• bonding device to bond said first sheet member and said second sheet member together after said sheet members are separately heated through the use of individual said sheet member heaters,
• moisture content detector, which is disposed between one of said sheet member heaters and said bonding device, provided for at least one of said sheet members to detect a moisture content of said sheet member or a parameter correlating with said moisture content;
• controller, which is communicably connected to moisture content detector and at least one of said sheet member heaters, to control said sheet member beater on the basis of detection information from said moisture content detector so that the moisture content approaches a predetermined optimum moisture content;
• and
• said controller comprises:
• decision element to make a decision as to whether or not a deviation between the optimum moisture content and a moisture content detected by said moisture content detector is below a predetermined value,
• first control element to feedback control said sheet member heater when said decision element makes the decision that said deviation is equal to or below a predetermined value;
• and
• second control element to feedforward control said sheet member heater when said decision element makes the decision that said deviation is more than said predetermined value.