US4780352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Covering structure for absorbent hygienic-sanitary products, and an absorbent product having such a covering
Assignee: Faricerca SpA
•
Filing: 1986-07-03
•
Granted: 1988-10-25
•
Expires: 2006-07-03
Abstract
Abstract A perforated covering structure is described for hygienic-sanitary products, such as sanitary towels for women, comprising an upper layer constituted by a non-woven textile of fibers of hydrophobic material, an intermediate layer or core constituted by a film of hydrophobic material, and a lower layer also constituted by a non-woven textile of fibers of hydrophobic material. The covering structure is applied in direct contact with that face of the absorbent core of the product which is intended to face the body of the user in use.
Inventors
- 👤 Gianfranco Palumbo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:00
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/511; A61F13/512; A61F13/5123; A61F13/51121; A61F13/5116; A61F13/513; A61F13/51305; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24628; Y10T428/24636; Y10T428/249921; Y10T428/249953; Y10T428/249962
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
92 words
A perforated, covering structure for absorbent hygienic-sanitary products comprising: an upper layer intended to face outwardly of the absorbent product, constituted by a non-woven textile of fibres of hydrophobic material, an intermediate layer constituted by a film of hydrophobic material, and a lower layer intended to face inwardly of the absorbent product, constituted by a non-woven textile of fibres of hydrophobic material; said structure having perforations separated by partitions defined, on the side intended to face outwardly of the absorbent product, by a curved face whose convexity faces outwardly of the structure.
Claim 2
Dependent Claim
92 words
A perforated, covering structure for absorbent hygienic-sanitary products comprising: an upper layer intended to face outwardly of the absorbent product, constituted by a non-woven textile of fibres of hydrophobic material, an intermediate layer constituted by a film of hydrophobic material, and a lower layer intended to face inwardly of the absorbent product, constituted by a non-woven textile of fibres of hydrophobic material; said structure having perforations separated by partitions defined, on the side intended to face outwardly of the absorbent product, by a curved face whose convexity faces outwardly of the structure.
Claim 3
Dependent Claim
19 words
A structure according to claim 1, wherein the upper layer is constituted by a non-woven textile of polypropylene fibres.
Claim 4
Dependent Claim
19 words
A structure according to claim 1 wherein the lower layer is constituted by a non-woven textile of polypropylene fibres.
Claim 5
Dependent Claim
22 words
A structure according to claim 1 wherein the intermediate layer is constituted by a film of material selected from polyethylene and polypropylene.
Claim 6
Dependent Claim
16 words
A structure according to claim 1 wherein the intermediate layer is constituted by a polyethylene film.
Claim 7
Dependent Claim
17 words
A structure according to claim 1, having an overall thickness of between substantially 200 and 700 microns.
Claim 8
Dependent Claim
17 words
A structure according to claim 1, having an overall thickness of between substantially 250 and 550 microns.
Claim 9
Dependent Claim
16 words
A structure according to claim 1, having an overall thickness of the order of 350 microns.
Claim 10
Dependent Claim
21 words
A structure according to claim 1, having an overall weight (basis weight) of between substantially 20 and 60 grams/m 2 .
Claim 11
Dependent Claim
24 words
A structure according to claim 1 wherein the upper layer has a weight (basis weight) of between substantially 7 and 40 grams/m 2 .
Claim 12
Dependent Claim
24 words
A structure according to claim 1 wherein the intermediate layer has a weight (basis weight) of between substantially 5 and 30 g/m 2 .
Claim 13
Dependent Claim
24 words
A structure according to claim 1 wherein the lower layer has a weight (basis weight) of between substantially 7 and 30 g/m 2 .
Claim 14
Dependent Claim
19 words
A structure according to claim 1, having a weight (basis weight) of the order of 40 g/m 2 .
Claim 15
Dependent Claim
57 words
A structure according to to claim 1, wherein the upper layer has a weight (gram weight) of the order of 20 g/m 2 , the intermediate layer has a weight (basis weight) of the order of 10 g/m 2 , and the lower layer has a weight (basis weight) of the order of 10 g/m 2 .
Claim 16
Dependent Claim
16 words
A structure according to claim 1, having an open area of between substantially 10 and 50%.
Claim 17
Dependent Claim
15 words
A structure according to claim 1, having an open area of the order of 25%.
Claim 18
Dependent Claim
17 words
A structure according to claim 1, having perforations with diameters of between substantially 0.4 and 1.5 mm.
Claim 19
Dependent Claim
17 words
A structure according to claim 1, having perforations with diameters of between substantially 0.6 and 0.9 mm.
Claim 20
Dependent Claim
36 words
A structure according to claim 1, having perforations of a square section with sides having a length of the order of 0.7 mm, spaced from each other by a distance of the order of 1.4 mm.
Claim 21
Dependent Claim
14 words
A structure according to claim 1, having perforations of circular or slightly elliptical section.
Claim 22
Dependent Claim
27 words
A structure according to claim 1 wherein the said upper layer has a surface portion which is relatively compact and an inner portion which is relatively soft.
Claim 23
Dependent Claim
32 words
A structure according to claim 21 wherein in each of the partitions the inner portion is completely isolated from the exterior by the surface portion and by the film of hydrophobic material.
Claim 24
Dependent Claim
28 words
A structure according to claim 1 having perforations separated by partitions defined, on the side intended to face inwardly of the absorbent product. by a substantially flat face.
Claim 25
Dependent Claim
106 words
An absorbent hygienic-sanitary product having an absorbent core with an upper face and a lower face, including a perforated covering structure which comprises: an upper layer intended to face outwardly of the absorbent product, constituted by a non-woven textile of fibres of hydrophobic material, an intermediate layer constituted by a film of hydrophobic material, and a lower layer intended to face inwardly of the absorbent product, constituted by a non-woven textile of fibres of hydrophobic material; said structure having perforations separated by partitions defined, on the side intended to face outwardly of the absorbent product, by a curved face whose convexity faces outwardly of the structure.
Claim 26
Dependent Claim
106 words
An absorbent hygienic-sanitary product having an absorbent core with an upper face and a lower face, including a perforated covering structure which comprises: an upper layer intended to face outwardly of the absorbent product, constituted by a non-woven textile of fibres of hydrophobic material, an intermediate layer constituted by a film of hydrophobic material, and a lower layer intended to face inwardly of the absorbent product, constituted by a non-woven textile of fibres of hydrophobic material; said structure having perforations separated by partitions defined, on the side intended to face outwardly of the absorbent product, by a curved face whose convexity faces outwardly of the structure.
Claim 27
Dependent Claim
24 words
A hygienic-sanitary product according to claim 24, wherein the intermediate layer adjacent said perforations is provided with fringes which extend towards the absorbent core.
Claim 28
Dependent Claim
35 words
A hygienic-sanitary product according to claim 24, wherein the absorbent core is constituted by a mat of fibres of hydrophylic material having a weight (basis weight) of between substantially 200 and 1200 g/m 2 .
Claim 29
Dependent Claim
16 words
A hygienic-sanitary product according to claim 24, wherein the absorbent core is constituted by cellulose fibres.
References Cited (Backward Citations)
US3929135A
Cited
US3965906A
Cited
US4055180A
Cited
US4173046A
Cited
JPS5568367A
Cited
GB2049553A
Cited
GB2055690A
Cited
US4323069A
Cited
GB2114895A
Cited
US4623340A
Cited
EP0178108A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |