Method for unwinding a sheet of homogenized tobacco material wound on a bobbin with specific force and angle ranges

A method to unwind a sheet of homogenized tobacco material wound in a bobbin, the method comprising:

• providing a bobbin of a coiled sheet of homogenized tobacco material, the bobbin defining an outer surface and comprising a free portion of the sheet unwound from the bobbin;
• arranging a compressing element on the outer surface of the bobbin, so as to define a contact line, the contact line being a line separating the free portion of the sheet from the rest of the bobbin;
• pressing, with the compressing element, the outer surface of the coiled sheet at the contact line with a force comprised between about 8 Newton and about 12 Newton;
• and
• unwinding the sheet from the bobbin by pulling the free portion of the sheet in an unwinding direction such that an angle between the free portion of the sheet and a radius of the bobbin at the contact line is comprised between about 110 degrees and about 150 degrees.