US3882216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable diaper
Assignee: International Paper Co
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Filing: 1974-01-15
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Granted: 1975-05-06
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Expires: 1994-01-15
Abstract
Abstract A method of forming an absorptive pad of cellulose fiber material smoothly graduated in thickness and absorptive capacity from an area of greatest thickness in the central portion to areas of lesser thickness along both the side and end edges of the diaper. The absorbent cellulose fiber pad is disposed between a fluid-pervious liner sheet of a soft, fibrous, non-woven web material and a fluid-impervious outer or backing sheet of a plastic film such as polyethylene. The liner and backing sheets are fin-sealed together along the side edges of the diaper, whereas at the end edges, the backing sheet is folded around the end of the pad, tucked between the pad and liner sheet and lapsealed to the liner. Pressure-sensitive tapes serve to secure the diaper on an infant.
Inventors
- 👤 John T Delanty
- 👤 William F Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:26
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/45; A61F13/49; A61F13/494; A61F13/49466; A61F13/15577; A61F13/15617; A61F13/15634; A61F13/51; A61F13/515; A61F13/53; A61F13/531; A61F13/532; A61F2013/49068; A61F2013/49074
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
187 words
A method for forming an absorbent cellulose fluff fiber pad of generally hourglass outline suitable for incorporation in a disposable diaper comprising: suspending individual wood cellulose fibers in a stream of air, directing said fiber-containing air stream radially outward from the center of a drum through a chute-like structure, the outer end of which chute is substantially hourglass shaped and covered by an air pervious screen forming the side wall of the drum, and having an air pervious fiber-collecting web material interposed between said hourglass-shaped chute end and said screen, deflecting selected portions of said fiber-bearing air stream so that a larger portion of said fibers impinge on said collecting web in a preselected, centrally located section within the area of the collecting web and screen covering the hourglass-shaped chute end, collecting said fibers on said collecting web while allowing the air stream to pass through said web and screen, whereby there is formed on said collecting web an hourglass-shaped fiber pad having substantially greater fiber concentration in said preselected centrally located section and, removing said collecting web and the collected pad of fibers from said screen.
Claim 2
Independent Claim
187 words
A method for forming an absorbent cellulose fluff fiber pad of generally hourglass outline suitable for incorporation in a disposable diaper comprising: suspending individual wood cellulose fibers in a stream of air, directing said fiber-containing air stream radially outward from the center of a drum through a chute-like structure, the outer end of which chute is substantially hourglass shaped and covered by an air pervious screen forming the side wall of the drum, and having an air pervious fiber-collecting web material interposed between said hourglass-shaped chute end and said screen, deflecting selected portions of said fiber-bearing air stream so that a larger portion of said fibers impinge on said collecting web in a preselected, centrally located section within the area of the collecting web and screen covering the hourglass-shaped chute end, collecting said fibers on said collecting web while allowing the air stream to pass through said web and screen, whereby there is formed on said collecting web an hourglass-shaped fiber pad having substantially greater fiber concentration in said preselected centrally located section and, removing said collecting web and the collected pad of fibers from said screen.
Claim 3
Dependent Claim
13 words
A method according to claim 1 wherein said collecting web is cellulose wadding.
Claim 4
Dependent Claim
17 words
A method according to claim 1 wherein said preselected, centrally located section is substantially elliptical in shape.
References Cited (Backward Citations)
US2489079A
Cited
US2714081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |