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US3720095A
Expired / Lapsed
US
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Method of testing cigarette paper
Assignee: Molins Machine Co Ltd
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Filing: 1968-10-07
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Granted: 1973-03-13
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Expires: 1988-10-07
Abstract
Abstract In a cigarette making system the porosity of the paper web forming the wrapper of the cigarettes is tested, for example by means of a pneumatic test device, and a signal thus obtained is fed to a cigarette inspector device which tests the cigarettes for leaks in the wrapper; the inspector device thus is compensated for variations in the paper porosity.
Inventors
- 👤 D Molins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:45
CPC Classifications
A; A24; A24C; A24C5/00; A24C5/32; A24C5/34; A24C5/3412; A24C5/005; A24C5/007; A24C5/3418
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A paper porosity testing device comprising a body having an internal chamber, a pair of opposed slots in the body for leading a paper strip into and out of the chamber, a pair of grooves in the chamber wall for guiding the paper strip between the two slots while it is in the chamber and a pair of ports in the body for applying pressure to one side of the paper strip and for measuring the pressure on the other side of the strip.
Claim 2
Dependent Claim
84 words
A paper porosity testing device comprising a body having an internal chamber, a pair of opposed slots in the body for leading a paper strip into and out of the chamber, a pair of grooves in the chamber wall for guiding the paper strip between the two slots while it is in the chamber and a pair of ports in the body for applying pressure to one side of the paper strip and for measuring the pressure on the other side of the strip.
References Cited (Backward Citations)
US2861451A
Cited
US3115037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |