Patent US4551377A successfully refreshed from Google Patents.
US4551377A
Expired / Lapsed
US
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Absorbent pads
Assignee: Chicopee LLC
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Filing: 1983-05-09
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Granted: 1985-11-05
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Expires: 2003-05-09
Abstract
Abstract An absorbent pad of non-woven fabric having high absorbency and integrity has on one side a layer of binder material for providing a surface having an absorbency reduced with respect to the remainder of the pad, the remainder of the pad being free of binder.
Inventors
- 👤 John Elves
- 👤 Stephen J. Ley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:23
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/48; D04H1/49; D04H1/58; D04H1/587; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24802; Y10T428/24826; Y10T428/24893; Y10T428/24901; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249982; Y10T428/249983; Y10T428/249985; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T442/00; Y10T442/20; Y10T442/2861; Y10T442/2869; Y10T442/60; Y10T442/689
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
68 words
An absorbent pad of non-woven fabric comprising absorbent textile fibers, said fabric having high absorbency and integrity, the pad having on one side a layer of binder material for providing a surface having an absorbency reduced with respect to the remainder of the pad, the remainder of the pad being free of binder, said fabric having apertures formed therein for allowing fluid to pass through the binder layer.
Claim 2
Dependent Claim
68 words
An absorbent pad of non-woven fabric comprising absorbent textile fibers, said fabric having high absorbency and integrity, the pad having on one side a layer of binder material for providing a surface having an absorbency reduced with respect to the remainder of the pad, the remainder of the pad being free of binder, said fabric having apertures formed therein for allowing fluid to pass through the binder layer.
Claim 3
Dependent Claim
21 words
An absorbent pad as claimed in claim 1 wherein the binder comprises between 2% and 20% of the total pad weight.
Claim 4
Dependent Claim
21 words
An absorbent pad as claimed in claim 2 wherein the binder comprises between 5% and 10% of the total pad weight.
Claim 5
Dependent Claim
15 words
An absorbent pad as claimed in claim 1 having a thickness of approximately 1 mm.
Claim 6
Dependent Claim
17 words
An absorbent pad as claimed in claim 4 wherein the binder layer is approximately 0.2 mm thick.
Claim 7
Dependent Claim
19 words
An absorbent pad as claimed in claim 1 wherein the fabric weighs between 50 and 200 gm -2 .
Claim 8
Dependent Claim
19 words
An absorbent pad as claimed in claim 6 wherein the fabric weighs between 100 and 150 gm -2 .
Claim 9
Dependent Claim
16 words
An absorbent pad as claimed in claim 1 wherein the non-woven fabric material is viscose rayon.
Claim 10
Dependent Claim
16 words
An absorbent pad as claimed in claim 8 wherein the material is super absorbent viscose rayon.
Claim 11
Dependent Claim
16 words
An absorbent pad as claimed in claim 1 wherein the non-woven fabric material is polyvinyl alcohol.
Claim 12
Dependent Claim
14 words
An absorbent pad as claimed in claim 1 wherein the binder includes a pigment.
Claim 13
Dependent Claim
13 words
An absorbent pad as claimed in claim 1 wherein the binder is acrylic.
Claim 14
Dependent Claim
14 words
An absorbent pad as claimed in claim 1 wherein the binder is polyvinyl acetate.
Claim 15
Dependent Claim
14 words
An absorbent pad as claimed in claim 12 wherein the binder is a copolymer.
Claim 16
Dependent Claim
14 words
An absorbent pad as claimed in claim 13 wherein the binder is a copolymer.
Claim 17
Dependent Claim
80 words
An absorbent pad of non-woven fabric having high absorbency and integrity, the pad having on one side a layer of binder material for providing a surface having an absorbency reduced with respect to the remainder of the pad, the remainder of the pad being free of binder, the binder comprising between 2% and 20% of the total pad weight, the pad being approximately 1 mm thick and the pad having apertures for allowing fluid to pass through the binder layer.
Claim 18
Dependent Claim
80 words
An absorbent pad of non-woven fabric having high absorbency and integrity, the pad having on one side a layer of binder material for providing a surface having an absorbency reduced with respect to the remainder of the pad, the remainder of the pad being free of binder, the binder comprising between 2% and 20% of the total pad weight, the pad being approximately 1 mm thick and the pad having apertures for allowing fluid to pass through the binder layer.
Claim 19
Dependent Claim
36 words
A method of manufacturing an absorbent pad as claimed in claim 1 comprising the steps of entangling a web of absorbent textile fibres, forming apertures therein, and applying a layer of binder material to the web.
Claim 20
Dependent Claim
28 words
A method as claimed in claim 17 wherein the fibres are supported on a woven belt and high pressure jets of fluid are used to entangle the fibres.
Claim 21
Dependent Claim
19 words
A method as claimed in claim 18 comprising the step of drying the web after the binder is applied.
Claim 22
Dependent Claim
19 words
A method as claimed in claim 18 wherin the belt is sufficiently coarse to form apertures in the web.
Claim 23
Dependent Claim
15 words
A method as claimed in claim 17 wherein the fibres are entangled by needle punching.
Claim 24
Dependent Claim
15 words
A method as claimed in claim 17 wherein the binder is applied by a roller.
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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) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |