Patent US4519798A successfully refreshed from Google Patents.
US4519798A
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US
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Absorptive structure
Assignee: Tredegar Corp
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Filing: 1982-08-25
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Granted: 1985-05-28
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Expires: 2002-08-25
Abstract
Abstract An absorptive structure or device such as a disposable diaper or the like, for absorbing and containing fluid bodily discharges, comprising a liquid permeable top sheet, a liquid permeable carrier sheet adjacent thereto, an absorbent element adjacent the permeable carrier sheet and a liquid impermeable back sheet adjacent the absorbent element. The edges of the sheets are sealed together without glue or other adhesive composition so that the absorptive element is imprisoned between the sheets. Additional carrier sheets may be included in the structure as desired.
Inventors
- 👤 Richard L. Dinius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:51
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/511; A61F13/515; A61F13/53; A61F13/534; A61F13/539; A61F13/513; A61F2013/51355; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/53445; A61F2013/53908; A61F2013/5395; B; B29; B29C; B29C65/00; B29C65/02; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/20; B29C66/24; B29C66/242; B29C66/2424; B29C66/24243; B29C66/24244; B29C66/40; B29C66/41; B29C66/43; B29C66/433; B29C66/70; B29C66/71; B29L; B29L2031/00; B29L2031/48; B29L2031/4871; B29L2031/4878
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
An absorptive structure for absorbing and containing liquid bodily discharges comprising a liquid permeable topsheet of polyolefin film, a liquid permeable carrier sheet of polyolefin film, an absorbent element, and a liquid impermeable back sheet of polyolefin film, all of said sheets of polyolefin film having the edges thereof sealed to each other without the necessity of the addition of any glue or other adhesive composition, mixture or compound, and said absorbent element sealed within said sheets of polyolefin film.
Claim 2
Dependent Claim
80 words
An absorptive structure for absorbing and containing liquid bodily discharges comprising a liquid permeable topsheet of polyolefin film, a liquid permeable carrier sheet of polyolefin film, an absorbent element, and a liquid impermeable back sheet of polyolefin film, all of said sheets of polyolefin film having the edges thereof sealed to each other without the necessity of the addition of any glue or other adhesive composition, mixture or compound, and said absorbent element sealed within said sheets of polyolefin film.
Claim 3
Dependent Claim
15 words
The absorptive structure of claim 1, wherein said sheets of polyolefin film are polyethylene film.
Claim 4
Dependent Claim
27 words
The absorptive structure of claim 1, wherein a second liquid permeable carrier sheet of polyolefin film is added between said absorbent element and said impermeable back sheet.
Claim 5
Dependent Claim
42 words
The absorptive structure of claim 1 comprising a plurality of liquid permeable carrier sheets of polyolefin film positioned between the absorbent element and the liquid permeable top sheet of polyolefin film and/or positioned between said absorbent element and said impermeable back sheet.
Claim 6
Dependent Claim
45 words
The absorptive structure of claim 1, wherein said liquid permeable top sheet of polyolefin film and/or said liquid permeable carrier sheet are provided with tapered capillaries having a base in the plane of the sheet and an apex remote from the plane of the sheet.
Claim 7
Dependent Claim
21 words
The absorptive structure of claim 1, wherein the edges of said sheets of polyolefin film are heat sealed to each other.
Claim 8
Dependent Claim
86 words
A disposable diaper comprising a liquid permeable top sheet of polyolefin film, a liquid permeable carrier sheet of polyolefin film adjacent thereto, an absorbent element adjacent said liquid permeable carrier sheet, and a liquid impermeable back sheet of polyolefin film adjacent the absorbent element, all of said sheets of polyolefin film having the edges thereof sealed to each other without the necessity of the addition of any glue or other adhesive composition, mixture or compound, and said absorbent element sealed within said sheets of polyolefin film.
Claim 9
Dependent Claim
86 words
A disposable diaper comprising a liquid permeable top sheet of polyolefin film, a liquid permeable carrier sheet of polyolefin film adjacent thereto, an absorbent element adjacent said liquid permeable carrier sheet, and a liquid impermeable back sheet of polyolefin film adjacent the absorbent element, all of said sheets of polyolefin film having the edges thereof sealed to each other without the necessity of the addition of any glue or other adhesive composition, mixture or compound, and said absorbent element sealed within said sheets of polyolefin film.
Claim 10
Dependent Claim
15 words
The disposable diaper of claim 7, wherein said sheets of polyolefin film are polyethylene film.
Claim 11
Dependent Claim
27 words
The disposable diaper of claim 7, wherein a second liquid permeable carrier sheet of polyolefin film is adjacent said liquid impermeable back sheet and said absorbent element.
Claim 12
Dependent Claim
42 words
The disposable diaper of claim 7, comprising a plurality of liquid permeable carrier sheets of polyolefin film positioned between said absorbent element and said liquid permeable top sheet of polyolefin film and/or positioned between said absorbent element and said impermeable back sheet.
Claim 13
Dependent Claim
45 words
The disposable diaper of claim 7, wherein said liquid permeable top sheet of polyolefin film and/or said liquid permeable carrier sheet are provided with tapered capillaries having a base in the plane of the sheet and an apex remote from the plane of the sheet.
Claim 14
Dependent Claim
21 words
The disposable diaper of claim 6, wherein the edges of said sheets of polyolefin film are heat sealed to each other.
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) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |