Patent ID: 7625328

Claim:
A method of producing a filter ( 3 ) for a cigarette ( 1 ), the filter comprising an organic filtering portion ( 7 ), in turn comprising granules ( 8 ) of an organic substance and house inside a cylindrical shell ( 11 ); and the method is characterized by comprising the steps of: inserting a plunger ( 19 ) inside a tubular spindle ( 18 ) to define a cylindrical chamber ( 21 ) inside the spindle ( 18 ); inserting the spindle ( 18 ) and the plunger ( 19 ) inside a container ( 23 ) of granules ( 8 ) of the organic substance, so as to fill the cylindrical chamber ( 21 ) with granules ( 8 ) of the organic substance; retaining the granules ( 8 ) of the organic substance inside the cylindrical chamber ( 21 ) by means of suction; inserting the spindle ( 18 ) partly inside the shell ( 11 ); feeding the granules ( 8 ) of the organic substance from the cylindrical chamber ( 21 ) of the spindle ( 18 ) into the shell ( 11 ) by moving the plunger ( 19 ) axially with respect to the spindle ( 18 ); and withdrawing the spindle ( 18 ) and the plunger ( 19 ) from the shell ( 11 ).