Patent US3596664A successfully refreshed from Google Patents.
US3596664A
Expired / Lapsed
US
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Filter cigarette
Assignee: RJ Reynolds Tobacco Co
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Filing: 1969-09-22
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Granted: 1971-08-03
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Expires: 1989-09-22
Abstract
Abstract A filter cigarette is provided which includes an elongated tobacco rod and an axially aligned filter assembly affixed to one end thereof. The filter assembly comprises a smoke-impervious core piece, and a smoke-pervious member disposed in abutting relation with respect to the downstream end of the core piece. The core piece is provided with a plurality of elongated facets; each facet being provided with an elongated indentation through which smoke is adapted to flow. The core piece is encompassed by a thin perforated membrane having perforations thereof aligned with the indentations. A sleeve is also provided which encompasses the perforated membrane. Portions of the sleeve and perforated membrane are in spaced relation and form a plurality of elongated longitudinally extending shallow passageways through which smoke is adapted to flow. Each passageway is in communication with an adjacent indentation through a membrane perforation. The smoke is emitted from the membrane perforations at a very high velocity and impinges against an adjacent surface before flowing through the smoke-pervious member.
Inventors
- 👤 Jesse R Pinkham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:47
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/04; A24D3/045
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
218 words
A filter cigarette comprising an elongated tobacco rod and a filter assembly affixed to one end of said rod; said assembly including an elongated core piece of smoke-impervious material disposed in axially aligned abutting relation with respect to said rod one end, said core piece having a plurality of elongated facets on its peripheral exterior, each facet being provided with an elongated indentation, through which smoke is caused to flow, said facets being separated from one another by elongated arcuate unindented portions; an elongated smoke-pervious member abutting the downstream end of said core piece; a perforated membrane overlying each core piece indentation; and a sleeve encompassing and being secured to said core piece exterior, portions of said sleeve being in registered spaced relation with respect to each facet and the perforated membrane overlying same, and cooperating therewith to form a plurality of elongated shallow passageways through which smoke is caused to flow, each passageway being in communication with a core piece indentation through a membrane perforation, each perforation being of such dimension that smoke passes therethrough at a high velocity whereby the solid and/or liquid particles entrained in the emitted smoke impinge against and are deposited on a surface disposed in close proximity to said membrane perforation prior to the smoke continuing its flow through said smoke-pervious member.
Claim 2
Dependent Claim
218 words
A filter cigarette comprising an elongated tobacco rod and a filter assembly affixed to one end of said rod; said assembly including an elongated core piece of smoke-impervious material disposed in axially aligned abutting relation with respect to said rod one end, said core piece having a plurality of elongated facets on its peripheral exterior, each facet being provided with an elongated indentation, through which smoke is caused to flow, said facets being separated from one another by elongated arcuate unindented portions; an elongated smoke-pervious member abutting the downstream end of said core piece; a perforated membrane overlying each core piece indentation; and a sleeve encompassing and being secured to said core piece exterior, portions of said sleeve being in registered spaced relation with respect to each facet and the perforated membrane overlying same, and cooperating therewith to form a plurality of elongated shallow passageways through which smoke is caused to flow, each passageway being in communication with a core piece indentation through a membrane perforation, each perforation being of such dimension that smoke passes therethrough at a high velocity whereby the solid and/or liquid particles entrained in the emitted smoke impinge against and are deposited on a surface disposed in close proximity to said membrane perforation prior to the smoke continuing its flow through said smoke-pervious member.
Claim 3
Dependent Claim
206 words
A filter cigarette comprising an elongated tobacco rod and a filter assembly affixed to one end of said rod; said assembly including an elongated core piece of smoke-impervious material disposed in axially aligned abutting relation with respect to said rod one end, said core piece having a plurality of elongated facets on its peripheral exterior, each facet being provided with an elongated indentation, through which smoke is caused to flow, said facets being separated from one another by elongated arcuate unindented portions; a perforated membrane overlying each core piece indentation; and a sleeve encompassing and being secured to said core piece exterior, portions of said sleeve being in registered spaced relation with respect to each facet and the perforated membrane overlying same, and cooperating therewith to form a plurality of elongated shallow passageways through which smoke is caused to flow, each passageway being in communication with a core piece indentation through a membrane perforation, each perforation being of such dimension that smoke passes therethrough at a high velocity whereby the solid and/or liquid particles entrained in the emitted smoke impinge against and are deposited on a surface disposed in close proximity to said membrane perforation prior to the smoke continuing its flow through said filter assembly.
Claim 4
Dependent Claim
206 words
A filter cigarette comprising an elongated tobacco rod and a filter assembly affixed to one end of said rod; said assembly including an elongated core piece of smoke-impervious material disposed in axially aligned abutting relation with respect to said rod one end, said core piece having a plurality of elongated facets on its peripheral exterior, each facet being provided with an elongated indentation, through which smoke is caused to flow, said facets being separated from one another by elongated arcuate unindented portions; a perforated membrane overlying each core piece indentation; and a sleeve encompassing and being secured to said core piece exterior, portions of said sleeve being in registered spaced relation with respect to each facet and the perforated membrane overlying same, and cooperating therewith to form a plurality of elongated shallow passageways through which smoke is caused to flow, each passageway being in communication with a core piece indentation through a membrane perforation, each perforation being of such dimension that smoke passes therethrough at a high velocity whereby the solid and/or liquid particles entrained in the emitted smoke impinge against and are deposited on a surface disposed in close proximity to said membrane perforation prior to the smoke continuing its flow through said filter assembly.
Claim 5
Dependent Claim
16 words
The filter cigarette of claim 2 wherein said indentations are closed at a corresponding one end.
Claim 6
Dependent Claim
29 words
The filter cigaRette of claim 3 wherein the maximum depth of each indentation adjacent the membrane perforation is less than the maximum depth of the remainder of said indentation.
Claim 7
Dependent Claim
26 words
The filter cigarette of claim 2 wherein the perforated membrane encompasses said core piece and is secured to the arcuate unindented portions of said core piece.
Claim 8
Dependent Claim
18 words
The filter cigarette of claim 1 wherein said smoke-pervious member is formed of bonded granules of activated charcoal.
Claim 9
Dependent Claim
16 words
The filter cigarette of claim 1 wherein said smoke-pervious member is formed of a cellulose derivative.
Claim 10
Dependent Claim
23 words
The filter cigarette of claim 2 wherein the surface against which the high velocity smoke impinges comprises the passageway-forming surface of said sleeve.
Claim 11
Dependent Claim
22 words
The filter cigarette of claim 2 wherein the surface against which the high velocity smoke impinges comprises a portion of said indentation.
Claim 12
Dependent Claim
32 words
The filter cigarette of claim 8 wherein each indentation has a closed end and an open end and the open end of each indentation is disposed adjacent said tobacco rod one end.
Claim 13
Dependent Claim
31 words
The filter cigarette of claim 1 wherein each indentation has a closed end and an open end and the open end of each indentation is disposed adjacent to said smoke-pervious member.
Claim 14
Dependent Claim
20 words
The filter cigarette of claim 2 wherein said elongated core piece is provided with four, symmetrically arranged, longitudinally extending facets.
Claim 15
Dependent Claim
26 words
The filter cigarette of claim 12 wherein the longitudinal dimension of each core piece indentation is less than the overall longitudinal dimension of said core piece.
Claim 16
Dependent Claim
22 words
The filter cigarette of claim 1 wherein said smoke-pervious member has substantially the same cross-sectional configuration as said tobacco rod one end.
Claim 17
Dependent Claim
20 words
The filter cigarette of claim 1 wherein said core piece and said smoke-pervious member have substantially the same cross-sectional configuration.
Claim 18
Dependent Claim
73 words
The filter cigarette of claim 15 wherein the sleeve therefor is provided with a plurality of inwardly extending smoke-barrier projections arranged in two longitudinally spaced rows, one of said rows encircling said smoke-pervious member and the other of said rows encircling said core piece; corresponding projections of each row being in registration with an elongated facet of said core piece and defining an end limit of the shallow passageway formed by the facet.
Claim 19
Dependent Claim
31 words
The filter cigarette of claim 2 wherein said sleeve includes a plurality of inwardly extending smoke-barrier projections, each projection being in registration with a passageway and forming one end limit thereof.
Claim 20
Dependent Claim
68 words
The filter cigarette of claim 2 wherein the smoke flow through said perforated membrane is in an out to in direction and the portion of each indentation adjacent the closed end thereof comprising an impingement target area for the high velocity smoke flowing through the adjacent membrane perforations, said target area remaining at a predetermined distance from the adjacent membrane perforations during the high velocity smoke flow therethrough.
References Cited (Backward Citations)
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US2954774A
Cited
FR1508121A
Cited
US3472238A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |