Patent US3886942A successfully refreshed from Google Patents.
US3886942A
Expired / Lapsed
US
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Sanitary napkin
Assignee: Kimberly Clark Corp
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Filing: 1974-04-29
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Granted: 1975-06-03
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Expires: 1994-04-29
Abstract
Abstract Sanitary napkins are disclosed comprised of an inner core of absorbent material and a cover which consists essentially of unfinished thermoplastic fibers. Preferably the cover is a web of continuous filaments of unfinished polypropylene fibers.
Inventors
- 👤 Leo J Bernardin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:46
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61F2013/51002; A61F2013/51038; A61F2013/51042; A61F13/53; A61F2013/530131; A61F2013/530182
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
136 words
A sanitary napkin comprising an inner core of absorbent material having a shape and size adaptable to absorb body menstrual fluids and a cover enclosing said inner core, said cover, in the body contacting area thereof, consisting of a nonwoven, porous and dry formed web having a basis weight of about 0.25 - 1 oz.lyd.2, said web consisting of unfinished polyolefin or polyester fibers, said unfinished fibers being characterized by fiber surfaces which are devoid of lubricants, antistatic, or wetting agents, said web being intermittently autogenously bonded at discrete bond areas occupying about 5-50% of the web area and disposed in a density of about 50-3200/inch2 to permit the passage of menstrual fluid therethrough and into the absorbent core under the body pressures of normal usage to provide a substantially dry surface feel to the wearer.
Claim 2
Dependent Claim
136 words
A sanitary napkin comprising an inner core of absorbent material having a shape and size adaptable to absorb body menstrual fluids and a cover enclosing said inner core, said cover, in the body contacting area thereof, consisting of a nonwoven, porous and dry formed web having a basis weight of about 0.25 - 1 oz.lyd.2, said web consisting of unfinished polyolefin or polyester fibers, said unfinished fibers being characterized by fiber surfaces which are devoid of lubricants, antistatic, or wetting agents, said web being intermittently autogenously bonded at discrete bond areas occupying about 5-50% of the web area and disposed in a density of about 50-3200/inch2 to permit the passage of menstrual fluid therethrough and into the absorbent core under the body pressures of normal usage to provide a substantially dry surface feel to the wearer.
Claim 3
Dependent Claim
134 words
A SANITARY NAPKIN COMPRISING AN INNER CORE OF ABOSRBENT MATERIAL HAVING A SHAPE AND SIZE ADAPTABLE TO ABSORB BODY MENSTRUAL FLUIDS AND A COVER ENCLOSING SAID INNER CORE, SAID COVER, IN THE BODY CONTACTING AREA THEREOF, CONSISTING OF A NONWOVEN, POROUS AND DRY FORMED WEB HAVING A BASIS WEIGHT OF ABOUT 0.25-1 OZ.LYD.2, SAID WEB CONSISTING OF UNFINISHED POLYOLEFIN OR POLYESTER FIBERS, SAID UNFINISHED FIBERS BEING CHARACTERIZED BY FIBER SURFACES WHICH ARE DEVOID OF LUBRICANTS, ANTISTATIC, OR WETTING AGENTS, SAID WEB BEING INTERMITTENTLY AUTOGENOUSLY BONDED AT DISCRETED BOND AREAS OCCUPYING ABOUT 5-50% OF THE WEB AREA AND DISPOSED IN A DENSITY OF ABOUT 50-3200/INCH2 TO PERMIT THE PASSAGE OF MENSTRUAL FLUID THERETHROUGH AND INTO THE ABSORBENT CORE UNDER THE BODY PRESSURE OF NORMAL USAGE TO PROVIDE A SUBSTANTIALLY DRY SURFACE FEEL TO THE WEARER.
Claim 4
Dependent Claim
134 words
A SANITARY NAPKIN COMPRISING AN INNER CORE OF ABOSRBENT MATERIAL HAVING A SHAPE AND SIZE ADAPTABLE TO ABSORB BODY MENSTRUAL FLUIDS AND A COVER ENCLOSING SAID INNER CORE, SAID COVER, IN THE BODY CONTACTING AREA THEREOF, CONSISTING OF A NONWOVEN, POROUS AND DRY FORMED WEB HAVING A BASIS WEIGHT OF ABOUT 0.25-1 OZ.LYD.2, SAID WEB CONSISTING OF UNFINISHED POLYOLEFIN OR POLYESTER FIBERS, SAID UNFINISHED FIBERS BEING CHARACTERIZED BY FIBER SURFACES WHICH ARE DEVOID OF LUBRICANTS, ANTISTATIC, OR WETTING AGENTS, SAID WEB BEING INTERMITTENTLY AUTOGENOUSLY BONDED AT DISCRETED BOND AREAS OCCUPYING ABOUT 5-50% OF THE WEB AREA AND DISPOSED IN A DENSITY OF ABOUT 50-3200/INCH2 TO PERMIT THE PASSAGE OF MENSTRUAL FLUID THERETHROUGH AND INTO THE ABSORBENT CORE UNDER THE BODY PRESSURE OF NORMAL USAGE TO PROVIDE A SUBSTANTIALLY DRY SURFACE FEEL TO THE WEARER.
Claim 5
Dependent Claim
21 words
The sanitary napkin of claim 1 wherein the web is an intermittently autogenously bonded porous nonwoven web of unfinished polypropylene fibers.
Claim 6
Dependent Claim
32 words
The sanitary napkin of claim 1 wherein the web is an intermittently autogenously bonded, porous web of substantially continuous and randomly deposited unfinished, molecularly oriented filaments of a polyolefin or a polyester.
Claim 7
Dependent Claim
14 words
The sanitary napkin of claim 3 wherein the continuous unfinished filaments are of polypropylene.
Claim 8
Dependent Claim
17 words
The sanitary napkin of claim 4 wherein the unfinished polypropylene filaments have a denier of about 1-5.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |