US4451520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spot bonded pattern for non-woven fabrics
Assignee: CAR FREUDENBERG Firma
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Filing: 1982-12-22
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Granted: 1984-05-29
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Expires: 2002-12-22
Abstract
Abstract This application relates to a non-woven fabric wherein the fibers of the fabric are bonded to each other and/or to another material in a plurality of equally spaced-apart spots, wherein the spots are the same size and are combined in a plurality of identical groups of not less than three nor more than five identical spots, each of said groups of spots being spaced apart from each other, and each of said spots within each group being positioned along a curved or straight line wherein the steady extension of said line beyond the end-spots of said group positioned along said line intersects and adjacent line along which an adjacent group of spots is positioned, and wherein the ratio of the distance separating the spots within each group of spots to the distance from an end-spot in each group to the next adjacent line along which an adjacent group of spots is positioned, is about 0.5 to about 3.0.
Inventors
- 👤 Bohuslav Tecl
- 👤 Erich Fahrbach
- 👤 Jurgen Knoke
- 👤 Hans C. Assent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:53
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/541; D04H1/5418; D04H1/542; D04H1/55; D04H1/58; D04H1/64; D04H1/66; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T442/00; Y10T442/60; Y10T442/69
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
167 words
A fabric comprising a non-woven fabric wherein the fibers of said fabric are bonded together by a bonding agent and/or autogenously in a plurality of equally spaced-apart spots, wherein the spots are the same size and are combined in a plurality of identical groups of not less than three nor more than five identical spots, each of said groups of spots being spaced apart from each other, and each of said spots within each group being positioned along a curve or straight line wherein the steady extension of said line beyond the end-spots of said group positioned along said line intersects an adjacent line along which an adjacent group of spots is positioned at a point outside the midpoint of the adjacent line, and wherein the ratio of the distance separating the spots within each group of spots to the distance from an end-spot in each group to the next adjacent line along which an adjacent group of spots is positioned, is about 0.5 to about 3.0.
Claim 2
Dependent Claim
167 words
A fabric comprising a non-woven fabric wherein the fibers of said fabric are bonded together by a bonding agent and/or autogenously in a plurality of equally spaced-apart spots, wherein the spots are the same size and are combined in a plurality of identical groups of not less than three nor more than five identical spots, each of said groups of spots being spaced apart from each other, and each of said spots within each group being positioned along a curve or straight line wherein the steady extension of said line beyond the end-spots of said group positioned along said line intersects an adjacent line along which an adjacent group of spots is positioned at a point outside the midpoint of the adjacent line, and wherein the ratio of the distance separating the spots within each group of spots to the distance from an end-spot in each group to the next adjacent line along which an adjacent group of spots is positioned, is about 0.5 to about 3.0.
Claim 3
Dependent Claim
15 words
The fabric according to claim 1 wherein said ratio is about 0.8 to about 1.6.
Claim 4
Dependent Claim
36 words
The fabric according to claim 1 wherein the length of the line along which said groups of spots are positioned is about 1.5 to about 5 times the shortest distance separating said lines from each other.
Claim 5
Dependent Claim
16 words
The fabric according to claim 1 wherein the groups of spots are positioned along curved lines.
Claim 6
Dependent Claim
25 words
The fabric according to claim 1 wherein said steadily extended line and said adjacent line intersect at an angle of about 25° to about 90°.
Claim 7
Dependent Claim
25 words
The fabric according to claim 2 wherein said steadily extended line and said adjacent line intersect at an angle of about 45° to about 60°.
Claim 8
Dependent Claim
172 words
A fabric comprising a non-woven fabric wherein the fibers of said fabric are bonded to each other and/or to another fabric by a bonding agent and/or autogenously in a plurality of equally spaced-apart spots, wherein the spots are the same size and are combined in a plurality of identical groups of not less than three nor more than five spots, each of said groups of spots being spaced apart from each other, and each of said spots within each group being positioned along a curved or straight line, wherein the steady extension of said line beyond the end-spots of said group positioned along said line intersects an adjacent line along which an adjacent group of spots is positioned at a point outside the midpoint of the adjacent line, and wherein the ratio of the distance separating the spots within each group of spots to the distance from an end-spot in each group to the next adjacent line along which an adjacent group of spots is positioned is about 0.5 to about 3.0.
Claim 9
Dependent Claim
172 words
A fabric comprising a non-woven fabric wherein the fibers of said fabric are bonded to each other and/or to another fabric by a bonding agent and/or autogenously in a plurality of equally spaced-apart spots, wherein the spots are the same size and are combined in a plurality of identical groups of not less than three nor more than five spots, each of said groups of spots being spaced apart from each other, and each of said spots within each group being positioned along a curved or straight line, wherein the steady extension of said line beyond the end-spots of said group positioned along said line intersects an adjacent line along which an adjacent group of spots is positioned at a point outside the midpoint of the adjacent line, and wherein the ratio of the distance separating the spots within each group of spots to the distance from an end-spot in each group to the next adjacent line along which an adjacent group of spots is positioned is about 0.5 to about 3.0.
Claim 10
Dependent Claim
15 words
The fabric according to claim 7 wherein said ratio is about 0.8 to about 1.6.
Claim 11
Dependent Claim
11 words
The fabric according to claim 7 wherein said lines are curved.
Claim 12
Dependent Claim
25 words
The fabric according to claim 1 wherein said steadily extended line and said adjacent line intersect at an angle of about 25° to about 90°.
Claim 13
Dependent Claim
25 words
The fabric according to claim 8 wherein said steadily extended line and said adjacent line intersect at an angle of about 45° to about 60°.
Claim 14
Dependent Claim
25 words
The fabric according to claim 1 wherein said steadily extended line and said adjacent line intersect at an angle of about 25° to about 60°.
Claim 15
Dependent Claim
25 words
The fabric according to claim 7 wherein said steadily extended line and said adjacent line intersect at an angle of about 25° to about 60°.
References Cited (Backward Citations)
FR1307386A
Cited
US4275105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |