US4573990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable diapers
Assignee: OHSAKI EISEI ZAIRYO KK
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Filing: 1984-11-20
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Granted: 1986-03-04
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Expires: 2004-11-20
Abstract
Abstract Disclosed herein is a disposable diaper formed from a web of layered material consisting of a water-absorbent, non-woven top sheet, a waterproof backing sheet bonded on its peripheral margins to the top sheet to thereby form a generally rectangular bag, and at least one layered middle pad encased in the bag. The web, with the top sheet facing up, is folded along its longitudinal center line into a generally inverted Ω-shaped vertical cross-sectional configuration and subsequently folded intermediate the opposite transverse ends thereof into a generally S-shaped vertical cross-sectional configuration whereby the front half of the web can be served as a front diapering area and the rear half of the web can be served as a rear diapering area. The S-shaped folded area of the web is bonded on the opposite longitudinal lapping margins to thereby form a pocket contiguous to the front diapering area of the web.
Inventors
- 👤 Hiroaki Ohsaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:02
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/45; A61F13/49; A61F13/49001; A61F13/495; A61F13/51; A61F13/511; A61F5/00; A61F5/44; A61F5/4401; A61F13/53; A61F13/534; A61F2013/4512; A61F2013/53445
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
205 words
A disposable diaper comprising a web of layered material including a water absorbent, non-woven top sheet, a waterproof backing sheet bonded to said top sheet at their peripheral margins to form a generally rectangular bag having longitudinal and transverse edges, and at least one layered middle pad encased in said bag, and extending over substantially the entire area of said bag; said web having a front portion serving as a front diapering area applicable to the abdomen of a human body, a rear portion serving as a diapering area applicable to the buttocks of a human body, and a medial portion therebetween; said web, with said top sheet facing up, being folded along its longitudinal center line into a generally inverted Ω-shaped vertical cross sectional configuration, and subsequently being folded intermediate the transverse edges of said bag and along the transverse edges of said medial portion into a generally S-shaped vertical cross-sectional configuration, wherein the contiguous, longitudinal edges of said bag in the S-shaped folded area are bonded together to form a pocket open at the transverse edge contiguous to said front diapering area, said pocket being located to receive urine and retain urine separate from feces, which is received in said rear diapering area.
Claim 2
Dependent Claim
205 words
A disposable diaper comprising a web of layered material including a water absorbent, non-woven top sheet, a waterproof backing sheet bonded to said top sheet at their peripheral margins to form a generally rectangular bag having longitudinal and transverse edges, and at least one layered middle pad encased in said bag, and extending over substantially the entire area of said bag; said web having a front portion serving as a front diapering area applicable to the abdomen of a human body, a rear portion serving as a diapering area applicable to the buttocks of a human body, and a medial portion therebetween; said web, with said top sheet facing up, being folded along its longitudinal center line into a generally inverted Ω-shaped vertical cross sectional configuration, and subsequently being folded intermediate the transverse edges of said bag and along the transverse edges of said medial portion into a generally S-shaped vertical cross-sectional configuration, wherein the contiguous, longitudinal edges of said bag in the S-shaped folded area are bonded together to form a pocket open at the transverse edge contiguous to said front diapering area, said pocket being located to receive urine and retain urine separate from feces, which is received in said rear diapering area.
Claim 3
Dependent Claim
55 words
A disposable diaper as defined in claim 1, wherein said at least one layered middle pad comprises a first middle pad encased in said front portion, and a second middle pad encased in said rear portion, said first and second middle pads each spaced a predetermined distance intermediate the opposite transverse ends of said web.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |