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US3848598A Expired / Lapsed US ⏱️ 0.0 years remaining

Disposable diaper with double contoured panel

Assignee: Johnson and Johnson
•
Filing: 1973-07-09
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Granted: 1974-11-19
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Expires: 1993-07-09
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Abstract

Abstract A method of producing a disposable diaper and the diaper produced thereby are disclosed. The disposable multi-layer diaper includes at one side a porous fibrous facing layer to be brought into contact with an infant''s skin, and includes at the other side a water impervious backing sheet, with a double contoured cross-sectional batt being interposed between the facing layer and backing sheet. The batt is smoothly contoured by increased fiber content along the transverse and longitudinal medians from the edges to the center of the batt. The batt is positioned in face-to-face engagement with the backing sheet. The batt and lateral extremities of the facing layer which extend beyond the batt are each adhered to the backing sheet. In a preferred embodiment of the invention, a paper-like, densified, highly compacted cellulosic layer is formed integrally with the batt and is positioned in face-to-face engagement with the backing sheet. The method provides a transverse peak in an airlaid web by simultaneously feeding to an individualizing station two continuous strips of compacted fibers, one strip being narrower than the other and lying along the longitudinal median of the other, the individualized fibers then being deposited on a moving foraminous belt from an air stream. Longitudinal peaks are provided by varying the rate of feed of the continuous strips to the individualizing station.

Inventors

  • 👤 F Mesek

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 04:14
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/531; A61F13/532; A61F13/15577; A61F13/15617; A61F13/15634; A61F2013/5326

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 111 words
A multi-layer diaper comprising: a rectangular waterimpervious backing sheet; an absorbent batt in juxtaposition with said backing sheet, said batt being smaller than said backing sheet and centrally disposed with respect thereto, said batt comprising a unitary, highly porous, loosely compacted, cellulosic fibrous layer continuous throughout its thickness and having a smaller quantity of fibers in at least two opposite marginal portions of its area than in a central portion therebetween, said batt having a smooth and gradual thickness contour between said marginal portions and said central portion; and a rectangular porous facing layer disposed over said batt, said loosely compacted batt having greater wettability to water than said facing layer.
Claim 2
Dependent Claim 111 words
A multi-layer diaper comprising: a rectangular waterimpervious backing sheet; an absorbent batt in juxtaposition with said backing sheet, said batt being smaller than said backing sheet and centrally disposed with respect thereto, said batt comprising a unitary, highly porous, loosely compacted, cellulosic fibrous layer continuous throughout its thickness and having a smaller quantity of fibers in at least two opposite marginal portions of its area than in a central portion therebetween, said batt having a smooth and gradual thickness contour between said marginal portions and said central portion; and a rectangular porous facing layer disposed over said batt, said loosely compacted batt having greater wettability to water than said facing layer.
Claim 3
Dependent Claim 15 words
The diaper of claim 1 wherein said marginal portions are side portions of said batt.
Claim 4
Dependent Claim 36 words
The diaper of claim 1 wherein said batt is contoured convexly about the transverse and longitudinal medians thereof and the ratio of contour apex thickness to corner thickness is in the range of 1.5 to 4.
Claim 5
Dependent Claim 178 words
A multi-layer diaper comprising: a rectangular water-impervious backing sheet; a rectangular absorbent batt in juxtaposition with said backing sheet, said batt being smaller than said backing sheet and centrally disposed with respect thereto, said batt comprising a unitary, highly porous, loosely compacted cellulosic fibrous layer having a paper-like, densified, compacted cellulosic fibrous layer of relatively high wettability and relatively high fluid retentivity formed integrally therewith, said densified layer being positioned in face-to-face engagement with said backing sheet, the quantity of fibers in said batt increasing gradually from both side edge portions and both end edge portions to the central portion of said batt thereby to produce a smooth convex thickness contour in the surface of the batt opposite said densified layer about the transverse and longitudinal medians of the batt in which the ratio of apex thickness to corner thickness in said batt is in the range of 1.5 to 4; and a rectangular porous facing layer disposed over the contoured portion of said batt, said loosely compacted batt having greater wettability to water than said facing layer.
Claim 6
Dependent Claim 178 words
A multi-layer diaper comprising: a rectangular water-impervious backing sheet; a rectangular absorbent batt in juxtaposition with said backing sheet, said batt being smaller than said backing sheet and centrally disposed with respect thereto, said batt comprising a unitary, highly porous, loosely compacted cellulosic fibrous layer having a paper-like, densified, compacted cellulosic fibrous layer of relatively high wettability and relatively high fluid retentivity formed integrally therewith, said densified layer being positioned in face-to-face engagement with said backing sheet, the quantity of fibers in said batt increasing gradually from both side edge portions and both end edge portions to the central portion of said batt thereby to produce a smooth convex thickness contour in the surface of the batt opposite said densified layer about the transverse and longitudinal medians of the batt in which the ratio of apex thickness to corner thickness in said batt is in the range of 1.5 to 4; and a rectangular porous facing layer disposed over the contoured portion of said batt, said loosely compacted batt having greater wettability to water than said facing layer.

References Cited (Backward Citations)

US2890700A Cited
US3426756A Cited
US3523536A Cited
US3663348A Cited
US3612055A Cited
US3766922A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-11-18 1978-05-20 1978-11-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-11-18 1982-05-20 1982-11-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-11-18 1986-05-20 1986-11-19 $7700.00 Window Closed / Lapsed

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