Patent US2380463A successfully refreshed from Google Patents.
US4170680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-woven fabrics
Assignee: EIDP Inc
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Filing: 1978-02-28
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Granted: 1979-10-09
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Expires: 1998-02-28
Abstract
Abstract A thermally segmentally bonded non-woven fabric having an attractive pattern of irregular bonds and a process for preparing it using heated patterned calender rolls having thereon surface patterns of lands with depressions between, one consisting of continuous lands and the other of isolated projections arranged in a particular way so that lands which oppose each other in the nip overlap to different extents.
Inventors
- 👤 David C. Cumbers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:52
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/542; D04H1/55; D04H1/541; D04H1/5412; D04H1/5418; D04H1/549; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T442/00; Y10T442/60; Y10T442/637; Y10T442/69; Y10T442/692
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
A non-woven fabric comprising a web of fibres which includes distributed thermoplastic material and which has been passed through a calender, said fabric, having on each face patterns of bonded areas at least some of which in one face overlap bonded areas on the opposite face, the material of the web between opposed portions of bonded areas being depressed and formed into coherent bonds, the coherently bonded areas varying in shape and area and together forming a pattern of bonded areas the centroids of area of those bonded areas immediately adjacent any imaginary straight line across the fabric differing in their distances therefrom, and the bonded areas on at least one face being discrete discontinuous areas distributed over this face, the fibres in the bonded areas being bonded by softening and resolidification of the thermoplastic material.
Claim 2
Dependent Claim
136 words
A non-woven fabric comprising a web of fibres which includes distributed thermoplastic material and which has been passed through a calender, said fabric, having on each face patterns of bonded areas at least some of which in one face overlap bonded areas on the opposite face, the material of the web between opposed portions of bonded areas being depressed and formed into coherent bonds, the coherently bonded areas varying in shape and area and together forming a pattern of bonded areas the centroids of area of those bonded areas immediately adjacent any imaginary straight line across the fabric differing in their distances therefrom, and the bonded areas on at least one face being discrete discontinuous areas distributed over this face, the fibres in the bonded areas being bonded by softening and resolidification of the thermoplastic material.
Claim 3
Dependent Claim
18 words
A fabric according to claim 1 wherein the web comprises staple fibres, continuous filaments or mixtures of these.
Claim 4
Dependent Claim
29 words
A fabric according to claim 1 wherein the web includes fibres or filaments made from a melt-spinnable synthetic organic polymer selected from the group consisting of polyesters and polyamides.
Claim 5
Dependent Claim
42 words
A fabric according to claim 1 wherein the fibres or filaments include bicomponent synthetic organic polymeric fibres wherein one component is present at least in part at the fibre surface and is of lower softening or melting point than the other component.
Claim 6
Dependent Claim
20 words
A fabric according to claim 1 consisting of a blend of mono-component synthetic staple fibres and bicomponent synthetic staple fibres.
Claim 7
Dependent Claim
18 words
A fabric according to claim 1 wherein the fibres include or consist of uncrimped synthetic organic staple fibres.
Claim 8
Dependent Claim
13 words
A fabric according to claim 1 wherein the web includes natural staple fibres.
Claim 9
Dependent Claim
35 words
A fabric as in claim 1 wherein the overlap of bonded areas on opposite faces of the fabric varies from negligibly small up to substantially the full area of the bonded area in one face.
References Cited (Backward Citations)
US3595731A
Cited
US3542634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |