US3661159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for stemming tobacco leaves and separating the products obtained
Assignee: Societe Nationale dExploitation Industrielle des Tabacs et Allumettes SAS
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Filing: 1970-04-21
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Granted: 1972-05-09
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Expires: 1990-04-21
Abstract
Abstract Apparatus for stemming tobacco leaves and for segregating the lighter and heavier parts of the resulting mixture comprises a stemming chamber for a rotary stemming unit serving to stem tobacco leaves which are admitted by way of a first inlet of the stemming chamber. The latter has at least one second inlet for admission of a current of separating air, at least one outlet for evacuation of heavier parts, and at least one outlet for evacuation of lighter parts with the air current. The distribution of outlets is such that the direction in which the lighter parts are evacuated with the air current is at least substantially counter to the direction of evacuation of heavier parts. This can be achieved by using the inlet or inlets for air as outlet or outlets for heavier parts.
Inventors
- 👤 Andre Pietrucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:51
CPC Classifications
A; A24; A24B; A24B5/00; A24B5/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
157 words
Apparatus for stemming tobacco leaves to form lighter and heavier parts and for separating such lighter parts and heavier parts from each other, comprising a stemming chamber having at least one first inlet for admission of tobacco leaves, at least one air-admitting second inlet, at least one first outlet for evacuation of heavier parts in a predetermined direction, and at least one air-discharging second outlet; a stemming unit having beating elements rotatably mounted in said chamber and arranged to stem tobacco leaves which are admitted by way of said first inlet; and means for circulating through said chamber and between said beating elements at least one current of separating air which enters by way of said second inlet and entrains lighter parts by way of said second outlet, said second inlet being at least closely adjacent to said first outlet so that the separation of lighter and heavier parts takes place in said stemming chamber and unit.
Claim 2
Dependent Claim
157 words
Apparatus for stemming tobacco leaves to form lighter and heavier parts and for separating such lighter parts and heavier parts from each other, comprising a stemming chamber having at least one first inlet for admission of tobacco leaves, at least one air-admitting second inlet, at least one first outlet for evacuation of heavier parts in a predetermined direction, and at least one air-discharging second outlet; a stemming unit having beating elements rotatably mounted in said chamber and arranged to stem tobacco leaves which are admitted by way of said first inlet; and means for circulating through said chamber and between said beating elements at least one current of separating air which enters by way of said second inlet and entrains lighter parts by way of said second outlet, said second inlet being at least closely adjacent to said first outlet so that the separation of lighter and heavier parts takes place in said stemming chamber and unit.
Claim 3
Dependent Claim
35 words
Apparatus as defined in claim 1, wherein said stemming chamber includes a peripheral wall and has a plurality of second inlets and first outlets, each of said second inlets constituting one of said first outlets.
Claim 4
Dependent Claim
34 words
Apparatus as defined in claim 1, wherein said stemming chamber includes an upper portion and a lower portion, said upper portion having an annular opening constituting said second outlet and surrounding said first inlet.
Claim 5
Dependent Claim
18 words
Apparatus as defined in claim 1, wherein said stemming chamber defines a plurality of communicating superposed stemming spaces.
Claim 6
Dependent Claim
15 words
Apparatus as defined in claim 1, further comprising an air lock for said first inlet.
Claim 7
Dependent Claim
22 words
Apparatus as defined in claim 1, wherein said stemming unit comprises tobacco engaging teeth angularly distributed about the axis of said unit.
References Cited (Backward Citations)
US1788683A
Cited
US2460938A
Cited
US2474314A
Cited
US2944629A
Cited
US3229698A
Cited
US3362414A
Cited
US3386451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |