US3581748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cigarette filter
Assignee: INT AUTOMATED ELECTRONICS CORP
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Filing: 1969-07-02
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Granted: 1971-06-01
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Expires: 1989-07-02
Abstract
Abstract A tobacco filter including a plurality of metallic foraminous plates for cooling smoke during passage therethrough. A baffle plate is inserted in the smoke stream for causing impinging contact between tobacco smoke and the baffle plate causing the depositing of tar thereon. Conical members are disposed on both sides of the baffle plate to cause acceleration of a smoke stream against the impinging surface of the baffle plate and deceleration of smoke flow on the other side of the baffle plate. Filtration is achieved by small granules of sandstone or gravel. The lip engaging portion of the cigarette filter includes a shredded paper end which is turned inwardly to provide further filtering.
Inventors
- 👤 Joe Cameron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:25
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/04; A24D3/045
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A tobacco filter device adapted to operate upon a flow stream of smoke comprising a filter portion enclosed within a sleeve section, at least one foraminous plate disposed in the sleeve section and oriented generally perpendicularly to the flow stream for absorbing heat therefrom, the plate having apertures therein to allow the passage of smoke therethrough, wherein the sleeve section further encloses two of said foraminous plates in parallel spaced relation, a baffle plate disposed intermediate the foraminous plates upon which a smoke stream impinges and deposits tar, channel means attached to the baffle plate for guiding the smoke stream through the baffle plate, and conical members opened at the base and apex portions thereof, the conical members being positioned adjacent the foraminous plates and convergingly positioned toward each other with the baffle plate interposed therebetween to cause acceleration of the smoke flow against one side of the baffle plate and deceleration of the flow upon exit from the channel means.
Claim 2
Dependent Claim
161 words
A tobacco filter device adapted to operate upon a flow stream of smoke comprising a filter portion enclosed within a sleeve section, at least one foraminous plate disposed in the sleeve section and oriented generally perpendicularly to the flow stream for absorbing heat therefrom, the plate having apertures therein to allow the passage of smoke therethrough, wherein the sleeve section further encloses two of said foraminous plates in parallel spaced relation, a baffle plate disposed intermediate the foraminous plates upon which a smoke stream impinges and deposits tar, channel means attached to the baffle plate for guiding the smoke stream through the baffle plate, and conical members opened at the base and apex portions thereof, the conical members being positioned adjacent the foraminous plates and convergingly positioned toward each other with the baffle plate interposed therebetween to cause acceleration of the smoke flow against one side of the baffle plate and deceleration of the flow upon exit from the channel means.
Claim 3
Dependent Claim
57 words
The filter structure set forth in claim 1 wherein the baffle plate comprises a disc-shaped web disposed perpendicularly to the smoke stream, the channel means being tubular elements attached at diametrically opposite points along the web perimeter, the tubular elements extending perpendicularly of the web and permitting the passage of smoke therethrough after impinging upon the web.
Claim 4
Dependent Claim
58 words
The filter structure set forth in claim 2 together with vent holes formed around the perimeter of the sleeve to permit the introduction of outside air into a space between a first encountered conical member and an associated surface of the baffle plate for effecting the introduction of oxygen into the smoke and further causing the cooling thereof.
Claim 5
Dependent Claim
31 words
The structure set forth in claim 3 in which said filter portion comprises a plug of filtering material disposed in the sleeve for causing filtration of irritants from smoke passing therethrough.
Claim 6
Dependent Claim
19 words
The filter structure set forth in claim 4 wherein the filtering plug comprises relatively small granules of sandstone gravel.
Claim 7
Dependent Claim
36 words
The filter structure set forth in claim 5 together with an additional foraminous plate disposed immediately inwardly of the lip engaging end of said sleeve for causing additional cooling of the smoke delivered to a smoker.
Claim 8
Dependent Claim
35 words
The filter structure set forth in claim 6 wherein the lip engaging portion of the sleeve section is shredded and includes inwardly turned shredded strips to effect additional filtering of smoke delivered to the smoker.
References Cited (Backward Citations)
GB191023412A
Cited
US1916799A
Cited
US2827903A
Cited
US2954783A
Cited
US3167076A
Cited
GB1047594A
Cited
US3457927A
Cited
US3504677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |