US3667468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sanitary napkin and method and means of producing
Assignee: Paper Converting Machine Co
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Filing: 1970-04-28
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Granted: 1972-06-06
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Expires: 1990-04-28
Abstract
Abstract A sanitary napkin which has a fluff layer sandwiched between carrier layers, the sandwich being C-folded to provide a lined channel on one side of the sandwich which encourages more even, rapid, and complete dispersion of body fluids.
Inventors
- 👤 Ernst Daniel Nystrand
- 👤 Brian H Mcintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:24
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/15577; A61F13/15617; A61F13/15634; B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; A61F13/53; A61F13/534; A61F13/53409; A61F13/53418; A61F13/537; A61F13/56; A61F13/58; A61F2013/15821; A61F13/45; A61F13/49; A61F2013/49068; A61F2013/49076; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530131; A61F2013/53445; A61F2013/53765; A61F2013/53786; A61F2013/586; B32B2307/00; B32B2307/70; B32B2307/726; B32B2307/7265; B32B2555/00; B32B2555/02; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/101; Y10T156/1011; Y10T156/1015; Y10T156/1028; Y10T156/103; Y10T156/1051; Y10T156/1052; Y10T156/1056; Y10T156/1057
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
A sanitary napkin comprising a plurality of elongated layers of flexible material arranged to lay flat including upper and lower exterior layers constructed of non-woven material and serving to confine a plurality of interior layers, two interior layers constructed of soft absorbable material and being relatively thicker than the other layers, said two interior layers being united along the longitudinal edges thereof with one of the interior layers having an access space along the longitudinal median whereby said two interior layers have essentially a C configuration in transverse section to provide a channel for dispersion of fluid, a pair of intermediate layers of absorbent material, one of the intermediate layers being interposed between the upper exterior layer and one of the interior layers and the other intermediate layer being interposed between the other interior layer and the lower exterior layer, and a pair of inner layers of absorbent material interposed between the two interior layers.
Claim 2
Dependent Claim
155 words
A sanitary napkin comprising a plurality of elongated layers of flexible material arranged to lay flat including upper and lower exterior layers constructed of non-woven material and serving to confine a plurality of interior layers, two interior layers constructed of soft absorbable material and being relatively thicker than the other layers, said two interior layers being united along the longitudinal edges thereof with one of the interior layers having an access space along the longitudinal median whereby said two interior layers have essentially a C configuration in transverse section to provide a channel for dispersion of fluid, a pair of intermediate layers of absorbent material, one of the intermediate layers being interposed between the upper exterior layer and one of the interior layers and the other intermediate layer being interposed between the other interior layer and the lower exterior layer, and a pair of inner layers of absorbent material interposed between the two interior layers.
Claim 3
Dependent Claim
114 words
A sanitary napkin comprising an elongated pad of soft moisture-absorbent material, a carrier web of moisture-absorbent material surrounding the pad, the pad and the carrier web being folded into a C-shape along a pair of spaced-apart parallel longitudinally extending lines to provide a lower pad portion and a pair of upper pad portions superposed on the lower pad portion to form a longitudinally extending channel, the upper pad portions and the lower portion being of approximately the same thickness, the upper pad portions being separated from the lower pad portion by a double thickness of the carrier web, and an outer wrap surrounding the C-folded pad and carrier web and extending across said channel.
Claim 4
Dependent Claim
114 words
A sanitary napkin comprising an elongated pad of soft moisture-absorbent material, a carrier web of moisture-absorbent material surrounding the pad, the pad and the carrier web being folded into a C-shape along a pair of spaced-apart parallel longitudinally extending lines to provide a lower pad portion and a pair of upper pad portions superposed on the lower pad portion to form a longitudinally extending channel, the upper pad portions and the lower portion being of approximately the same thickness, the upper pad portions being separated from the lower pad portion by a double thickness of the carrier web, and an outer wrap surrounding the C-folded pad and carrier web and extending across said channel.
Claim 5
Dependent Claim
43 words
The napkin of claim 11 in which each of the upper pad portions includes a longitudinally extending inwardly facing longitudinal edge spaced from the longitudinal edge of the other pad portion to provide a relatively narrow longitudinally extending access slot for the channel.
Claim 6
Dependent Claim
25 words
The napkin of claim 3 in which the width of said slot is substantially smaller than the width of each of said upper pad portions.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |