Abstract: A device for changing operative portions for tobacco industry machines including a receiving portion made in a structural part of a tobacco industry machine; a plug member attached to an operative portion of the tobacco industry machine, a locking member, housed in the structural part of the machine and configured to adopt a locked position, where it locks the plug member in the receiving portion, and a released position, where it releases the plug member from the receiving portion and actuating means acting on the locking member at least to move the locking member from the locked position to the released position.

Abstract: A device for changing operative portions for tobacco industry machines including a receiving portion made in a structural part of a tobacco industry machine; a plug member attached to an operative portion of the tobacco industry machine, a locking member, housed in the structural part of the machine and configured to adopt a locked position, where it locks the plug member in the receiving portion, and a released position, where it releases the plug member from the receiving portion and actuating means acting on the locking member at least to move the locking member from the locked position to the released position.

Abstract: A filter for a cigarette has an organic filtering portion defined by granules or fibres of active carbon and housed inside a cylindrical shell of plastic material; the shell is located between a portion of cellulose acetate, which is engaged orally by a user, and a cigarette portion, and has a bottom, contacting the portion of cellulose acetate and hermetically supporting a particulate trap for retaining fine particulate, and an end contacting the cigarette portion and closed by a plug of cellulose acetate.

Abstract: A filter for a cigarette has an organic filtering portion defined by granules or fibres of active carbon and housed inside a cylindrical shell of plastic material; the shell is located between a portion of cellulose acetate, which is engaged orally by a user, and a cigarette portion, and has a bottom, contacting the portion of cellulose acetate and hermetically supporting a particulate trap for retaining fine particulate, and an end contacting the cigarette portion and closed by a plug of cellulose acetate.

Abstract: Filters for cigarettes are manufactured on a machine by which a web of activated carbon fiber fabric is decoiled from a roll, fed into a fragmentation device and broken up into filaments or particles. The fragments are gathered by a first unit into a continuous flow directed up and through the top outlet of an ascent channel into a further unit with a slidable and air-permeable aspirating belt such as will attract and retain the filaments or particles rising through the channel and shape them progressively into a continuous stream which is then released by the belt to the infeed of a unit equipped with a garniture section along which a strip of paper is wrapped around the continuous stream to form a continuous filter rod. Finally, the rod is fed through a rotary cutter and divided into sticks that will provide the single filter plugs for attachment to cigarettes.

Abstract: A rolling head for a resistance seam welding machine comprises a stator; an annular electrode constituting the rotor rotatably mounted on the stator; a device for conducting electricity through a sliding contact, positioned between the stator and the rotor and pressed in axial direction against at least one of them by an elastic force; and conduits through which a coolant flows in the stator, in the rotor and in the sliding contact conductive device. The electrical conductive device comprises elastically yielding elements, forming a radial effect sector shaped and/or made in various different ways, positioned between the stator and the rotor and designed to remain permanently in contact with the stator and the rotor so as to conduct electrical current from one to the other.

Abstract: A rolling head for a resistance seam welding machine comprises a stator; an annular electrode constituting the rotor rotatably mounted on the stator; a device for conducting electricity through a sliding contact, positioned between the stator and the rotor and pressed in axial direction against at least one of them by an elastic force; and conduits through which a coolant flows in the stator, in the rotor and in the sliding contact conductive device. The electrical conductive device comprises elastically yielding elements, forming a radial effect sector shaped and/or made in various different ways, positioned between the stator and the rotor and designed to remain permanently in contact with the stator and the rotor so as to conduct electrical current from one to the other.