US3885568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable article
Assignee: Individual
•
Filing: 1973-07-12
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Granted: 1975-05-27
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Expires: 1993-07-12
Abstract
Abstract Expandable articles comprising flat interleaved sheets of bendable material some portions of which overlap, and fastening means securing the sheets together in the overlapping portions without obstructing relative movement of the remaining portions of the sheets to bend the unfastened positions of the sheets independently of each other and bulk the article. The bulked article can function as a diaper, wipe or other absorbent, or as a pillow or other kind of spacer.
Inventors
- 👤 Charles H Schaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:07
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/53409; A61F13/53418; A61F13/01; A61F13/01021; A61F13/535; A61F13/539; A61F2013/00361; A61F2013/00727; A61F2013/00731; A61F2013/15008; A61F2013/15048; A61F13/15203; A61F2013/15284; A61F2013/15365; A61F2013/1539; A61F13/45; A61F2013/4512; A61F2013/53445; A61F2013/53908; A61F2013/5395; A61F2013/53966
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
112 words
A disposable diaper having an expandable fluid impervious back sheet and an expandable, fluid pervious cover sheet enclosing a bulkable product comprising bendable sheet material superposed together in flat planar relation and presenting more layers of said sheet material in a central region of said product than in other regions thereof, means retaining portions of said layers in said central region in said superposed planar relation and remaining portions of said sheet material being movable independently of each other in a predetermined direction into irregularly bent non-planar layers patulously bulking said product and retaining said product in bulked configuration, at least some of said layers being formed of an absorbent sheet material.
Claim 2
Dependent Claim
112 words
A disposable diaper having an expandable fluid impervious back sheet and an expandable, fluid pervious cover sheet enclosing a bulkable product comprising bendable sheet material superposed together in flat planar relation and presenting more layers of said sheet material in a central region of said product than in other regions thereof, means retaining portions of said layers in said central region in said superposed planar relation and remaining portions of said sheet material being movable independently of each other in a predetermined direction into irregularly bent non-planar layers patulously bulking said product and retaining said product in bulked configuration, at least some of said layers being formed of an absorbent sheet material.
Claim 3
Dependent Claim
20 words
A disposable diaper in accordance with claim 1 wherein said back sheet and said cover sheet are heat sealed together.
Claim 4
Dependent Claim
66 words
A disposable diaper in accordance with claim 1, said back sheet having dimensions exceeding that of said bulkable product so as to provide flaps, said back sheet having at least one pleat in a direction approximately parallel to edges of said layers in said central region of said bulkable product, said flaps being folded inwardly so as to enclose the outer edges of said bulkable product.
Claim 5
Dependent Claim
19 words
The disposable diaper of claim 3 wherein said folded flaps function as the retaining means for said enclosed layers.
Claim 6
Dependent Claim
28 words
The disposable diaper of claim 3 wherein said cover sheet has at least one pleat in a direction approximately parallel to the overlapping edges of said absorbent pad.
Claim 7
Dependent Claim
19 words
The disposable diaper of claim 3 wherein the overlapping edges of said bulkable product extend transversely of the diaper.
Claim 8
Dependent Claim
19 words
The disposable diaper of claim 3 wherein the overlapping edges of said bulkable product extend longitudinally of the diaper.
Claim 9
Dependent Claim
46 words
A disposable diaper in accordance with claim 1 wherein said bulkable product comprises sheets cut along two opposite sides in a direction parallel to said overlapping edges along the line of overlap, with the portions of said sheets between the cuts being folded toward the center.
Claim 10
Dependent Claim
40 words
The disposable diaper in accordance with claim 1 wherein some of the sheets of said absorbent pad are creased in a direction approximately perpendicular to the overlapping edges, thereby providing means for diverting the direction of expansion of said diaper.
Claim 11
Dependent Claim
20 words
The disposable diaper of claim 9 wherein said crease defines a plane in a direction away from said cover sheet.
Claim 12
Dependent Claim
29 words
The disposable diaper in accordance with claim 1 wherein some of the absorbent sheets directly under said cover sheet are slit in a direction perpendicular to said overlapping edges.
Claim 13
Dependent Claim
33 words
The disposable diaper in accordance with claim 1 wherein said bulkable product comprises a plurality of bulkable products in accordance with claim 1, secured together so as to form an initially tubular product.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |