Abstract: An apparatus for manufacturing a component of an aerosol-generating article is provided, the apparatus including: a conveyor configured to convey a band of material through the apparatus along a first path; and a device disposed along the first path, the device including: one or more nozzles configured to apply additive to the band of material, when the band of material passes the device, and a device body including a contact surface configured to contact the conveyed band of material as the band of material passes the device, the contact surface having a convex profile as viewed in a direction of the first path at the device; and a funnel having a first open end configured to receive the band of material and a second open end providing an exit point for the band of material, the first open end being positioned downstream of the device.