System and method for applying an additive to an aerosol-generating substrate for an aerosol-generating article

A system for applying an additive to an aerosol-generating substrate for an aerosol-generating article, the system comprising:

• an aerosol-generating substrate, the aerosol-generating substrate being a sheet, a foil, or a web of aerosol-generating material;
• a reservoir containing an additive;
• an applicator roller configured to rotate around a rotational axis,
• wherein the reservoir comprises a dispensing opening configured to dispense the additive to the applicator roller,
• wherein the applicator roller is further configured to transfer the additive from the applicator roller to the aerosol-generating substrate by a rotational movement of the applicator roller around a rotational axis thereof and a relative movement of the aerosol-generating substrate with respect to the applicator roller in a conveying direction;
• and
• at least one backing roller, the at least one backing roller and the applicator roller being arranged to apply pressure from both sides to the aerosol-generating substrate.

A method for applying an additive to an aerosol-generating substrate for an aerosol-generating article, where the aerosol-generating substrate is a sheet, a foil, or a web of aerosol-generating material, the method comprising:

• dispensing an additive from a reservoir to a roller through a dispensing opening of the reservoir;
• moving the aerosol-generating substrate along a conveying direction;
• and
• rotating the roller for applying the additive to the aerosol-generating substrate and applying pressure from both sides to the aerosol-generating substrate by means of the roller and at least one backing roller.