US3631867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke filter
Assignee: RJ Reynolds Tobacco Co
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Filing: 1970-05-15
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Granted: 1972-01-04
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Expires: 1990-05-15
Abstract
Abstract A smoke filter is provided wherein the filter includes a laminated module provided with a pair of elongated smoke passageways separated from one another by a perforated lamina. The module is encapsulated by an elongated smoke impervious member whereby the upstream end of one module passageway and the downstream end of the other passageway are exposed. The elongated member is initially a solid extruded rod which is subsequently provided with an elongated longitudinally extending slot formed in one side thereof into which the laminated module is inserted. Subsequent to the insertion of the module into the member slot, the open side of the slot is closed thereby encapsulating the module therein.
Inventors
- 👤 Hoyt S Beard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:11
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0275; A24D3/0283
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
157 words
A smoke filter for use with a tobacco rod, comprising an elongated laminated module having upstream and downstream ends, and an elongated member of smoke impervious material encapsulating said module whereby the upstream and downstream ends of the latter are exposed; said module including outer laminae, a center lamina having a plurality of small perforations, and spacer means intermediate said center lamina and each outer lamina and cooperating therewith to form a pair of elongated smoke passageways, one passageway having an open upstream end and a closed downstream enD, and the second passageway having a closed upstream end and an opened downstream end; communication between said passageways being through the perforations of said center lamina whereby the smoke flow therethrough is a plurality of high-velocity jets which impinge against the outer lamina surface defining said second passageway; said module laminae being completely assembled relative to one another prior to said module being engaged by said encapsulating member.
Claim 2
Dependent Claim
157 words
A smoke filter for use with a tobacco rod, comprising an elongated laminated module having upstream and downstream ends, and an elongated member of smoke impervious material encapsulating said module whereby the upstream and downstream ends of the latter are exposed; said module including outer laminae, a center lamina having a plurality of small perforations, and spacer means intermediate said center lamina and each outer lamina and cooperating therewith to form a pair of elongated smoke passageways, one passageway having an open upstream end and a closed downstream enD, and the second passageway having a closed upstream end and an opened downstream end; communication between said passageways being through the perforations of said center lamina whereby the smoke flow therethrough is a plurality of high-velocity jets which impinge against the outer lamina surface defining said second passageway; said module laminae being completely assembled relative to one another prior to said module being engaged by said encapsulating member.
Claim 3
Dependent Claim
73 words
The smoke filter of claim 1 wherein said spacer means comprises a second pair of laminae, each lamina of said second pair being provided with an elongated open-ended slot; the open end of the slot of one lamina being substantially coterminus with the open upstream end of said one passageway and the open end of the slot of the other lamina being substantially coterminus with the open downstream end of said second passageway.
Claim 4
Dependent Claim
22 words
The smoke filter of claim 2 wherein each module lamina is formed from a separate narrow strip of thin smoke impervious material.
Claim 5
Dependent Claim
22 words
The smoke filter of claim 1 wherein said outer laminae are foldably connected to opposite elongated peripheral segments of said center lamina.
Claim 6
Dependent Claim
22 words
The smoke filter of claim 4 wherein said spacer means comprises an embossment formed in one of the laminae defining each passageway.
Claim 7
Dependent Claim
71 words
The smoke filter of claim 4 wherein said module is formed from a blank of foldable sheet material; said blank including a pair of elongated substantially parallel foldlines defining a pair of outer laminae, and a perforated center lamina disposed between said outer laminae; one foldline terminating at its upstream end in an elongated open-end slot, and the other foldline terminating at its downstream end in a second elongated open-end slot.
Claim 8
Dependent Claim
50 words
The smoke filter of claim 6 wherein the portion of each outer lamina coextensive with the foldline being disposed in substantially spaced relation with respect to said center lamina when said outer laminae are folded relative to said center lamina to form said module having said pair of elongated passageways.
Claim 9
Dependent Claim
28 words
The smoke filter of claim 7 wherein each outer lamina is provided with a recessed inner surface portion which cooperates with said center lamina to form a passageway.
Claim 10
Dependent Claim
44 words
The smoke filter of claim 7 wherein a lamina forming each passageway is provided with spacer-forming embossments which are adapted to engage the other passageway-forming lamina and maintain said laminae in a predetermined spaced relation when said blank is folded to form said module.
Claim 11
Dependent Claim
15 words
The smoke filter of claim 7 wherein the length of each lamina is substantially coextensive.
Claim 12
Dependent Claim
42 words
The smoke filter of claim 1 including a cylindrical plug of smoke pervious fibrous material disposed in abutting aligned relation with the downstream end of said elongated encapsulating member, and a sleeve of tipping paper encompassing said plug and said elongated member.
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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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |