Method of simultaneously producing two continuous cigarette rods
AssigneeG.D Societa' Per Azioni
InventorsBruno Belvederi, Fiorenzo Draghetti
Life of this patent
Estimating the term…
Abstract
In a machine for simultaneously producing two continuous cigarette rods from respective layers of tobacco, shredded tobacco is fed by an air current along an upfeed duct, closed off at the top by a first and a second suction conveyor, in such a manner as to form two substreams mainly consisting respectively of light and heavy tobacco particles and directed respectively towards the first and second conveyor. Each of the two substreams impinges, along the upfeed duct, on respective deflecting and mixing elements, which deflect part of each substream towards the other substream so as to feed two substantially identical final secondary streams onto the suction conveyors.
Claims13
A method of simultaneously producing two continuous cigarette rods from respective tobacco layers (46, 44) supplied by respective conveyors (4, 5);
- characterized by the fact that it comprises stages consisting in forming, from a main stream (38) of shredded tobacco, two substreams (42, 41) of shredded tobacco, one consisting predominantly of relatively heavy tobacco particles, and the other predominantly of relatively light tobacco particles;
- directing the two substreams (41, 42) respectively towards a first (4) and second (5) of said conveyors (4, 5);
- and mixing part of each substream (42, 41) with the other substream, so as to feed on to the two conveyors (4, 5) two final secondary streams (45, 43) containing substantially the same concentration of light and heavy tobacco particles.
A method of producing two continuous cigarette rods from respective layers (46, 44) of tobacco supplied by respective conveyors (4, 5);
- characterized by the fact that it comprises stages consisting in feeding a main stream (38) of tobacco in a first given direction (14);
- pneumatically deflecting the main stream (38) into the input end of a duct (15) extending in a second direction (39) substantially perpendicular to said first direction (14), so as to form two substreams (42, 41) of shredded tobacco, one consisting predominantly of relatively heavy particles and the other predominantly of relatively light particles, and flowing respectively along a first (17) and second (16) wall of said duct (15) facing each other and substantially perpendicular to said first direction (14), the output end of said duct (15) being closed off by said conveyors (5, 4) located respectively adjacent to said first (17) and second (16) walls;
- dividing each substream (41, 42) longitudinally into two substantially equal parts;
- and deflecting a first of said two parts of each said substream (41, 42) away from the respective said wall (16, 17) and towards the other said wall (17, 16), so as to mix it with a second of said two parts of the other substream (41, 42) and so form, along said walls (16, 17), two final secondary streams (45, 43) having substantially the same concentration of light and heavy particles, and which are intercepted by respective said conveyors (4, 5) for forming, on the conveyors (4, 5), respective said layers (46, 44) of tobacco.
Dependencies are inferred from the claim text.