Patent US3731786A successfully refreshed from Google Patents.
US3731786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor belt for belt fissure detection apparatus
Assignee: Sumitomo Riko Co Ltd
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Filing: 1970-09-21
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Granted: 1973-05-08
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Expires: 1990-09-21
Abstract
Abstract A conveyor belt designed for employment in combination with a conveyor belt fissure detection apparatus wherein at consecutive intervals there is embedded in the interior of the conveyor belt a loop detection coil consisting of a plurality of conductors each having a flexible stranded core around which is spirally wound a metallic wire. The conductors are bound together by welt threads of synthetic material to insure independent flexibility of the separate conductors as bound together.
Inventors
- 👤 Z Nagata
- 👤 M Ui
- 👤 T Fujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:57
CPC Classifications
B; B65; B65G; B65G43/00; B65G43/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
94 words
A conveyor belt for employment in conjunction with a conveyor belt fissure detection apparatus comprising an elongated flexible belt having embedded therein at consecutive intervals loop detectiOn coils, each such coil comprising a plurality of conductors each having a flexible stranded core around which is spirally wound a metallic wire, said conductors bound together in aligned planer position to form a conductor band, said loop detection coils being embedded within the conveyor belt with the width of the conductor band positioned in a direction within the conveyor belt transverse to the longitudinal length thereof.
Claim 2
Dependent Claim
94 words
A conveyor belt for employment in conjunction with a conveyor belt fissure detection apparatus comprising an elongated flexible belt having embedded therein at consecutive intervals loop detectiOn coils, each such coil comprising a plurality of conductors each having a flexible stranded core around which is spirally wound a metallic wire, said conductors bound together in aligned planer position to form a conductor band, said loop detection coils being embedded within the conveyor belt with the width of the conductor band positioned in a direction within the conveyor belt transverse to the longitudinal length thereof.
Claim 3
Dependent Claim
77 words
In a conveyor belt having embedded therein electromagnetic loop detection coils for employment in conjunction with a conveyor belt fissure detection apparatus, wherein each of said loop detection coils comprises a plurality of aligned conductor wires flexibly bound together and having high durability against bending fatigue, each of said conductor wires consisting of a flexible core made of material having high resistance to bending stress with a metallic conductor spirally wound along the length of said core.
Claim 4
Dependent Claim
77 words
In a conveyor belt having embedded therein electromagnetic loop detection coils for employment in conjunction with a conveyor belt fissure detection apparatus, wherein each of said loop detection coils comprises a plurality of aligned conductor wires flexibly bound together and having high durability against bending fatigue, each of said conductor wires consisting of a flexible core made of material having high resistance to bending stress with a metallic conductor spirally wound along the length of said core.
Claim 5
Dependent Claim
27 words
The loop coils of claim 2 characterized by welt threads employed to bind together said conductor wires arranged in aligned relation to form a flexible conductor band.
Claim 6
Dependent Claim
32 words
The loop coils of claim 3 characterized by being embedded in the conveyor belt at intervals along its length in a direction transverse relative to the longitudinal extent of the conveyor belt.
Claim 7
Dependent Claim
31 words
The loop coils of claim 2 characterized in that said flexible core is composed of one or more of the materials from the group consisting of polyester, nylon or glass fibers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |