The method for drying filter rods comprises the steps of providing a filter rod, providing a support surface (2) for receiving the filter rod (4) and guiding the filter rod on the support surface by a guide element (1) arranged above the support surface. The method further comprises the step of supplying a gas stream of compressed gas having a pressure between 0 and 6 bar to the filter rod through the guide element when the filter rod is transported along the support surface, before wrapping the filter rod with a wrapping material (5).

A cooling filter rod and an application thereof are disclosed. The filter rod comprises a hollow tube (1). The inside of the hollow tube (1) is provided with at least one plate (2) which partition the inside of the hollow tube and is perpendicular to the axis of the hollow tube (1). The area of the plate (2) is the same as the cross-sectional area of a hollow portion of the hollow tube (1) Each plate (2) is independently provided with at least one through hole (3). The cooling filter rod reduces the adsorption of cigarette smoke, greatly lowers the smoke temperature felt by mouth, improves the sensory quality of cigarettes, and is suitable for application in new heat-not-burn cigarettes.

There is provided an aerosol-generating article (10) comprising an aerosol-generating substrate (12) and a mouthpiece (14). The mouthpiece (14) comprises at least one segment of filter material (18, 20, 22), a breakable capsule (26) containing an aqueous liquid (32), and a plurality of microencapsulated flavourant particles (38) dispersed within the at least one segment of filter material (22). Each of the microencapsulated flavourant particles (38) comprises a flavourant encapsulated within a shell comprising a water sensitive material, such that the plurality of microencapsulated flavourant particles (38) are adapted to release a flavourant upon contact with the liquid (32) contained within the breakable capsule (26).

A cellulose acetate particle aggregate, a preparation method therefor and an application thereof, which relate to the field of harm reduction additives in cigarettes. The cellulose acetate particle aggregate includes 49-99.5 wt % of cellulose acetate particles, 0-50 wt % of a second kind of particles, and 0.5-20 wt % of a binder. The preparation method involves selecting cellulose acetate particles and a second kind of particles in a certain ratio, or cellulose acetate particles alone, preparing particle aggregates by using an air fluidized granulation method while adding a binder thereto, and sieving the particle aggregates to obtain a cellulose acetate particle aggregate having a required particle size. The cellulose acetate particle aggregate has a porous structure, an irregular shape, and a rough and uneven surface, which help to improve the efficiency of filtering out particulate matters or one or more harmful ingredients in cigarette smoke.

A machine for manufacturing tobacco industry filter rods, the filter rods comprising single-length longitudinal objects, wherein the machine comprises: a preparation unit for preparing a strand of filtering fibers; a forming unit for forming a continuous filter rod from the strand of the filtering fibers; a feeding unit for feeding multiple-length longitudinal objects; a cutting unit for cutting the multiple-length longitudinal objects into the single-length longitudinal objects; a transferring unit for transferring the single-length longitudinal objects; a positioning unit for placing the single-length longitudinal objects in the continuous filter rod while it is being formed; a cutting head for cutting the formed continuous filter rod that comprises the filtering fibers and the single-length longitudinal objects, into individual filter rods. The cutting unit for cutting the multiple-length longitudinal objects into the single-length longitudinal objects comprises a multi-flute drum conveyor.

A tobacco smoke filter or filter element including a longitudinally extending core of tobacco smoke filtering material of circumference 14 to 17 mm which includes a channel which extends longitudinally from an end of the core; wherein the core further includes a plasticiser in an amount of 17 to 19% by weight of the tobacco smoke filtering material.

An aerosol-generating article (10) includes an aerosol forming substrate (20) and a filter (30) downstream of the substrate. The filter comprises filter material comprising filaments having a linear density of about 4 denier or greater. The filter has a resistance to draw of less than 130 mmWG. Preferably, the filter has a resistance to draw of 90 mmWG or less. More preferably, the filter has a resistance to draw of 70 mmWG or less. Preferably, the density of the filter material is about 0.12 g/cm.sup.3 or greater.

A filter part (1) for use in an aerosol generating article and a method of manufacturing the filter part (1). The filter part (1) includes an aerosol permeable core (11) surrounded by a sleeve (12). The sleeve (12) is formed of linear, axially oriented fibres and the core (11) is formed of expanded, randomly oriented fibres. The method includes forming two or more strips (2a, 2b) into segments surrounding a conveying path, bringing the segments together into a sleeve former (7) to form the sleeve (12) and introducing loose fibres (52) between the segments upstream of the sleeve former (7) such that they are drawn therein in a random orientation and compressed between the segments as they are brought together to form a filter rod (8) with an aerosol permeable core (11) within the sleeve (12). The filter rod (8) is then cut to form the filter part (1).

A system, apparatus and method for forming a smoke filter including a forming nozzle through which a fibrous bundle material passes. The forming nozzle includes a converging passage, at least one first internal cavity in fluid connection with a first working fluid source, and a plurality of first holes fluidly connecting the at least one first internal cavity with a working surface of the forming nozzle. The plurality of first holes are further positioned and directed such that in passing through the plurality of first holes, the first working fluid conveys the fibrous bundle material through the forming nozzle in a transport direction. A guide pin is disposed along a central axis of the converging passage, the guide pin including an elongated body which tapers in the transport direction. A bobbin disposed downstream of the forming nozzle.

A system includes system at least one dispenser configured to dispense to dispense a plurality of segments on a first conveying path and a spacing drum configured to receive a number of the plurality of segments per revolution of the drum and configured to release the number of segments on a second conveying path at a segment-release spacing and a segment-release speed along the conveying path, the number of the plurality of segments being at least three and the number of segments released by the spacing drum forming a filter element.