US4088726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making non-woven fabrics
Assignee: EIDP Inc
•
Filing: 1975-04-17
•
Granted: 1978-05-09
•
Expires: 1995-04-17
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. Cunbers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:37
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/541; D04H1/5412; D04H1/5418; D04H1/542; D04H1/549; D04H1/55; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
A method of making a thermally segmentally bonded fabric by passing a web comrising at least some distributed thermally bondable material through the nip between co-operating calender rolls at least one of which is heated and which have different surface land patterns, wherein some irregularity of bond pattern is provided by the surface pattern on one roll consisting of lands which are continuous and the surface pattern on the other roll consisting of lands which are isolated projections and the centroids of area of those projections concurrently in the nip being disposed at differing distances from the longitudinal axis of the nearest continuous land surface so that lands which oppose each other in the nip overlap to different extents.
Claim 2
Independent Claim
119 words
A method of making a thermally segmentally bonded fabric by passing a web comrising at least some distributed thermally bondable material through the nip between co-operating calender rolls at least one of which is heated and which have different surface land patterns, wherein some irregularity of bond pattern is provided by the surface pattern on one roll consisting of lands which are continuous and the surface pattern on the other roll consisting of lands which are isolated projections and the centroids of area of those projections concurrently in the nip being disposed at differing distances from the longitudinal axis of the nearest continuous land surface so that lands which oppose each other in the nip overlap to different extents.
Claim 3
Dependent Claim
28 words
A method according to claim 1 wherein the pattern of isolated projections is symmetrical and uniform but is skewed at a small angle relative to the rolls axes.
Claim 4
Dependent Claim
31 words
A method according to claim 1 wherein the isolated projections on one roll are arranged in rows in close or overlapping echelon along directions inclined to the line of the nip.
Claim 5
Dependent Claim
38 words
A method according to claim 1 wherein the distances of the centroids of area of the isolated projections from the longitudinal axes of the continuous lands range from zero to half of the spacing between adjacent continuous lands.
Claim 6
Dependent Claim
18 words
A method according to claim 1 wherein the web comprises staple fibres, continuous filaments or mixtures of these.
Claim 7
Dependent Claim
29 words
A method according to claim 1 wherein the web includes fibres of filaments made from a melt-spinnable synthetic organic polymer selected from the group consisting of polyesters and polyamides.
Claim 8
Dependent Claim
45 words
A method according to claim 1 wherein the fibres or filaments include or consist of 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 9
Dependent Claim
23 words
A method according to claim 1 wherein the web consists of a blend of monocomponent synthetic staple fibres and bicomponent synthetic staple fibres.
Claim 10
Dependent Claim
18 words
A method according to claim 1 wherein the web includes or consists of uncrimped synthetic organic staple fibres.
Claim 11
Dependent Claim
13 words
A method according to claim 1 wherein the web includes natural staple fibres.
References Cited (Backward Citations)
GB984047A
Cited
US3093502A
Cited
US3325302A
Cited
GB1245088A
Cited
US3765974A
Cited
US3542634A
Cited
US3855046A
Cited
US3920874A
Cited
US3753826A
Cited
US4005169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |