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US 7,380,552 B2Granted
Unit for forming a continuous mat of tobacco
AssigneeG.D Societa'per Azioni
InventorsFiorenzo Draghetti, Fausto Mengoli, Umberto Zanetti
Life of this patent
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Abstract
A unit for forming a continuous mat of tobacco with denser portions, wherein the mat of tobacco is formed on a suction conveyor belt looped about a return pulley and extending through two successive shredded tobacco feed stations; and wherein the return pulley, located at one of the two feed stations, has a number of radial suction seats, each for retaining a localized quantity of tobacco on the conveyor belt.
Claims6
A unit for forming a continuous mat (3) of tobacco with denser portions (41), the unit (2) comprising:
- a conveyor belt (6) extending along a given path (P);
- first feed means (20) located along said path (P) and for feeding a first continuous stream (22) of shredded tobacco onto said conveyor belt (6);
- first suction means (16, 17) located on the opposite side of said conveyor belt (6) to said first feed means (20), and cooperating with said first feed means (20) to retain a continuous mat (3) of shredded tobacco on said conveyor belt (6);
- second feed means (35) for feeding a second continuous stream (37) of shredded tobacco onto said conveyor belt (6);
- and
- second suction means (10, 26) located on the opposite side of said conveyor belt (6) to said second feed means (35), comprising a return suction pulley (10) for returning said conveyor belt (6) along said path (P) and cooperating with said second feed means (35) to retain on said conveyor belt (6) a succession of localized quantities (40) of shredded tobacco spaced along said conveyor belt (6) with the same spacing as said denser portions (41).
3 more elements
Dependencies are inferred from the claim text.