US4877126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor belt
Assignee: Akzo NV
•
Filing: 1988-06-02
•
Granted: 1989-10-31
•
Expires: 2008-06-02
Abstract
Abstract Filte restproof conveyor belt, which has a high strength, and is particularly suitable for use in coal mines. It includes a matrix of, e.g. rubber having incorporated therein at least one layer of reinforcement fabric extending parallel to the supporting surface and the tread of the belt, the warp of the fabric extending in the longitudinal direction of the belt and including both polyamide and polyester filaments. Filtertestproof qualities are imparted to the belt by using aramid filaments as polyamide warp filaments, and by weaving the fabric in such a way that the yarn-in-fabric take-up of the aramid warp yarns, cords or cables is higher than that of the polyester warp yarns, cords or cables.
Inventors
- 👤 Freerk R. van Calker
- 👤 Pieter J. M. Kopmels
- 👤 Antonius W. M. ter Burg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:17
CPC Classifications
B; B65; B65G; B65G15/00; B65G15/30; B65G15/32; B65G15/34; B65G2201/00; B65G2201/04; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3179; Y10T442/322; Y10T442/3228; Y10T442/326; Y10T442/3276
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A conveyor belt formed by a matrix, more particularly based on rubber, such as polychloroprene rubber, in which there is at least provided a layer of woven reinforcing fabric extending parallel to the bearing surface and the tread of the conveyor belt, of which reinforcing fabric the warp extending in longitudinal direction of the conveyor belt comprises both load bearing yarns, cords or cables consisting of polyester and load bearing yarns, cords or cables consisting of aramid, wherein the load bearing aramid warp yarns, cords or cables in the reinforcing fabric display a greater yarn-in-fabric take up than the load bearing polyester yarns, cords or cables.
Claim 2
Dependent Claim
106 words
A conveyor belt formed by a matrix, more particularly based on rubber, such as polychloroprene rubber, in which there is at least provided a layer of woven reinforcing fabric extending parallel to the bearing surface and the tread of the conveyor belt, of which reinforcing fabric the warp extending in longitudinal direction of the conveyor belt comprises both load bearing yarns, cords or cables consisting of polyester and load bearing yarns, cords or cables consisting of aramid, wherein the load bearing aramid warp yarns, cords or cables in the reinforcing fabric display a greater yarn-in-fabric take up than the load bearing polyester yarns, cords or cables.
Claim 3
Dependent Claim
41 words
A conveyor belt according to claim 1, characterized in that the yarn-in-fabric take up of the load bearing aramid warp is 2 to 15%, more particularly 4 to 9%, greater than the yarn-in-fabric take up of the load bearing polyester warp.
Claim 4
Dependent Claim
24 words
A conveyor belt according to claim 1, characterized in that the yarn-in-fabric take up of the load bearing polyester warp is 2 to 10%.
Claim 5
Dependent Claim
31 words
A conveyor belt according to claims 1 and 3, characterized in that the yarn-in-fabric take up of the load bearing aramid warp is 4 to 25%, more particularly 6 to 19%.
Claim 6
Dependent Claim
19 words
A conveyor belt according to claim 1, characterized in that the load bearing aramid warp material comprises poly(p-phenylene terephthalamide).
Claim 7
Dependent Claim
19 words
A conveyor belt according to claim 1, characterized in that the load bearing polyester warp is of polyethylene terephthalate.
Claim 8
Dependent Claim
19 words
A conveyor belt according to claim 1, characterized in that the weft is of polyamide 66 or polyamide 6.
Claim 9
Dependent Claim
36 words
A conveyor belt according to claim 1, characterized in that at least 5 percent by weight, more particularly 10 to 50% by weight, of the load bearing warp material in the reinforcing fabric is of aramid.
Claim 10
Dependent Claim
29 words
A conveyor belt according to claim 8, characterized in that not more than 80% by weight of the load bearing warp material in the reinforcing fabric is of aramid.
References Cited (Backward Citations)
DE48332C
Cited
GB1014922A
Cited
GB1273528A
Cited
US3944060A
Cited
GB2003577A
Cited
GB2095295A
Cited
GB2101643A
Cited
US4647495A
Cited
US4569883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |