US4859388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved method of making discrete airlaid absorbent fibrous articles
Assignee: Procter and Gamble Co
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Filing: 1987-11-03
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Granted: 1989-08-22
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Expires: 2007-11-03
Abstract
Abstract An improved, continuous airlaying apparatus for making airlaid articles such as discrete absorbent fibrous cores for catamenial napkins and disposable diapers and the like having high structural integrity, and good edge definition. The articles are airlaid in discrete cavities as they pass through a deposition zone of the apparatus, and are compacted a predetermined amount prior to their being removed from their respective deposition cavities. An exemplary mechanism for effecting the compacting comprises a lugged cylinder having circumferentially spaced lugs which are configured and pitched to mesh in a quasi gear-like manner with the deposition cavities.
Inventors
- 👤 David A. Peterson
- 👤 Douglas H. Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:02
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/15577; A61F13/15617; A61F13/15626
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
An improved method of making discrete absorbent fibrous articles by depositing air-entrained fibers in discrete closed-bottom deposition cavities, said improvement comprising the steps of: rotating a drum having said cavities: overfilling each of said cavities with said fibers; continuously scarfing away the excess of said fibers to thereby form in each said cavity an uncompacted preform of a said article having the size and shape of said cavity, a thickness equal to the depth of said cavity, and an outwardly exposed top surface; rotating a lugged cylinder in synchronous relation with said drum; mechanically compacting each said preform to reduce its thickness by a predetermined amount while it is disposed in its respective said rotating cavity, said compacting being effected by mechanical rolling of a lug of said lugged cylinder against said top surface and thereby converting each said preform into a said article; and then discharging each said article from its respective deposition cavity.
Claim 2
Dependent Claim
155 words
An improved method of making discrete absorbent fibrous articles by depositing air-entrained fibers in discrete closed-bottom deposition cavities, said improvement comprising the steps of: rotating a drum having said cavities: overfilling each of said cavities with said fibers; continuously scarfing away the excess of said fibers to thereby form in each said cavity an uncompacted preform of a said article having the size and shape of said cavity, a thickness equal to the depth of said cavity, and an outwardly exposed top surface; rotating a lugged cylinder in synchronous relation with said drum; mechanically compacting each said preform to reduce its thickness by a predetermined amount while it is disposed in its respective said rotating cavity, said compacting being effected by mechanical rolling of a lug of said lugged cylinder against said top surface and thereby converting each said preform into a said article; and then discharging each said article from its respective deposition cavity.
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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) | 1992-08-21 | 1993-02-20 | 1993-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-21 | 1997-02-20 | 1997-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-21 | 2001-02-20 | 2001-08-22 | $7700.00 | Window Closed / Lapsed |