Method and apparatus for caliper control of a fibrous web

A method for increasing caliper control of a tissue the method comprising the steps of:

• providing a tissue having a first side and a second side, the tissue to be wound onto a roll;
• controlling a pressure that a calendering device applies to the tissue in such a manner that the pressure increases uniformity of caliper of the tissue being wound onto the roll from a core region of the roll to an outer region of the roll;
• applying the pressure to at least one of the sides of the tissue with the calendaring device;
• and
• winding the tissue onto the roll after the pressure is applied to the tissue by the calendering device.

A system for controlling the caliper of a fibrous web, the apparatus comprising:

• a calender device that forms a nip through which the fibrous web is conveyed, the nip of the calender device applying pressure to a first side and a second side of the fibrous web;
• a reel disposed within an operable distance to the calender device, the reel having a cylindrical surface extending in an axial manner;
• a roll which may be slidably disposable onto and removable from the cylindrical surface of the reel, the roll interacting with the fibrous web in a manner in which the fibrous web is wound onto the roll;
• and
• an adjustment device integrally disposed to the calender device, the adjustment device allowing the pressure created by the nip of the calender device to be adjusted to permit the pressure to increase on the first and second side of the fibrous web as diameter of the roll increases, thus increasing uniformity of the caliper of the fibrous web.

An apparatus for controlling the caliper of a tissue, the apparatus comprising:

• a set of calender rollers forming a nip, the calender rollers transporting the tissue through the nip and applying pressure to the tissue;
• a center-winding device disposed downstream from the calender rollers in the tissue's direction of travel, the center-winding device having a cylinder extending therefrom onto which a roll may be placed;
• and
• a setting device configured with the calender rollers, the setting device permitting control of the pressure created by the calender rollers on the tissue in such a manner that the pressure increases uniformity of caliper of the tissue being wound onto the roll from a core region of the roll to an outer region of the roll.