Abstract: In order to provide when smoking a cigarette a substantially uniform concentration of the flavoring substance or substances supplied to the tobacco rod (23) in the form of at least one flavoring substance, the flow of flavoring substance is controlled, in accordance with the invention, periodically between a maximum and a minimum flow. The maximum flow is applied to those parts (36) of the tobacco rod which each include the tip-end of a cigarette, whereas the minimum flow is applied to the opposite end part (37) of the cigarette.

Abstract: This invention relates to a method of evaluating processing of a product mass, such as a tobacco leaf mass, by measuring the weight of the mass as throughflow per unit of time during transport of the mass between two locations and by measuring, in a point at or close to the weight measuring point, the actual moisture content of the mass, transmitting weight and moisture signals to a computer for evaluating required addition of material, such as moisture and sauce, to the mass and controlling a processing station for adjusted addition of said material to a predetermined value for the mass.