Apparatus for building a continuous tobacco stream

Details Apparatus for building a continuous tobacco stream Apparatus for building a continuous tobacco stream

1977-05-10

1979-11-27

Michell, Robert W.

Tobacco

Cigar or cigarette making

Molding or forming

131108, 131110, 406 82, A24C 539, B65G 5330, A24B 714

Patent

active

041755707

ABSTRACT:
Apparatus for building a continuous tobacco stream at the underside of the lower reach of an endless foraminous conveyor belt has an upright duct with an inlet at or close to the lower end and a narrow channel-like outlet below the lower reach of the belt. A feeding device supplies tobacco particles into the inlet of the duct, preferably in a direction to cause the particles to move toward the outlet. One side wall of the duct has elongated openings which make an acute angle with the direction of movement of the lower reach of the belt and discharge currents of compressed air which accelerate and advance the particles toward the underside of the lower reach in such a way that the direction of movement of particles in the outlet of the duct has a component of movement in the direction of lengthwise movement of the lower reach. The currents of air accelerate and advance the particles independently of the feeding device. The latter can be assisted by additional currents of compressed air which are admitted into the inlet and are evacuated, at least in part, at the level of the openings in the side wall of the duct. A suction chamber above the lower reach of the belt attracts the particles to the underside of the lower reach or against the particles of the growing tobacco stream at the underside of the lower reach. The rate of evacuation of air from the suction chamber exceeds the rate of admission of compressed air through the openings in the side wall of the duct.

REFERENCES:
patent: Re29042 (1976-11-01), David
patent: 4041958 (1977-08-01), Wahle

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