1. A method of forming a chewing gum, comprising: - providing a pair of rolls containing a first roll and a second roll, - moving the chewing mass toward the gap between said rollers in the flow direction, and calibrating the chewing mass into a substantially continuous and flat chewing gum sheet having a substantially uniform thickness from about 0.3 mm to about 10 mm by means of said pair of rolls, said calibration leading to at least a 30% change in the cross-sectional area of the chewing mass prior to said calibration from said flow direction. The method according to claim 1, wherein said chewing mass is accumulated immediately before said calibration by said pair of rolls. The method of claim 1, wherein said calibration is substantially exhaustive. The method according to claim 1, wherein said calibration results in a change of not more than 75% of the cross-sectional area of the chewing mass before said calibration from said flow direction. A method of forming a chewing gum, comprising: providing a pair of rolls comprising a first roll and a second roll, moving the chewing mass toward a gap between said rolls in the flow direction, and calibrating the chewing mass into a substantially continuous and flat chewing gum sheet having a substantially a uniform thickness of from about 0.3 mm to about 10 mm by means of the indicated pair of rolls, wherein, with the specified calibration, the specified pair of rolls pushes the chewing mass toward and between the gap between the specified pair of rolls and the zones of the specified chewing mass near the specified pair of rolls are pushed by the specified pair of rolls more quickly1. Способ формования жевательной резинки, включающий:- обеспечение пары валков, содержащей первый валок и второй валок,- продвижение жевательной массы к зазору между указанными валками в направлении потока, и- калибровку жевательной массы в по существу непрерывный и плоский лист жевательной резинки, имеющий по существу однородную толщину от ок