US4572359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor belt
Assignee: Bridgestone Corp
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Filing: 1984-03-29
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Granted: 1986-02-25
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Expires: 2004-03-29
Abstract
Abstract A conveyor belt is disclosed, which comprises an upper covering rubber layer, a lower covering rubber layer, and a core layer embedded between the upper and lower covering layers and is adapted for used in conveyance while being elastically deformed in such a cylindrical shape as to overlap the widthwise edge portions thereof with each other. In this type of the conveyor belt, a low friction layer is provided on each of both surfaces of the belt at the overlap portion.
Inventors
- 👤 Mamoru Fujita
- 👤 Yasuaki Kameta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:38
CPC Classifications
B; B65; B65G; B65G15/00; B65G15/30; B65G15/32; B65G15/40; B65G2201/00; B65G2201/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
A conveyor belt comprising; an upper covering rubber layer, a lower covering rubber layer, a core layer embedded between the upper and lower covering layers and adapted for use in conveyance while being elastically deformed in a substantially cylindrical shape to overlap surfaces of the widthwise edge portions thereof with each other and a low friction layer provided at least on each of surfaces the widthwise edge portions of the conveyor belt that overlap with each other.
Claim 2
Dependent Claim
77 words
A conveyor belt comprising; an upper covering rubber layer, a lower covering rubber layer, a core layer embedded between the upper and lower covering layers and adapted for use in conveyance while being elastically deformed in a substantially cylindrical shape to overlap surfaces of the widthwise edge portions thereof with each other and a low friction layer provided at least on each of surfaces the widthwise edge portions of the conveyor belt that overlap with each other.
Claim 3
Dependent Claim
51 words
A conveyor belt according to claim 1, wherein said low friction layer is made of a material having a small friction coefficient selected from the group consisting of a canvas of cotton, vinylon, polyester or nylon, a polytetrafluoroethylene film and a porous material which allows oozing-out of an oily matter therefrom.
Claim 4
Dependent Claim
31 words
A conveyor belt according to claim 1, wherein said low friction layer is bonded to each outer surface of both widthwise edge portions of the upper and lower covering rubber layers.
Claim 5
Dependent Claim
51 words
A conveyor belt according to claim 1, wherein said low friction layer is secured to each side surface of said upper and lower covering rubber layers, and each edge portion of said core layer projecting from said covering rubber layers in the widthwise direction is embedded in said low friction layer.
Claim 6
Dependent Claim
26 words
A conveyor belt according to claim 1, wherein a width of said overlap portion is not more than one seventh of the width of the belt.
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) | 1989-02-24 | 1989-08-26 | 1990-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-24 | 1993-08-26 | 1994-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-24 | 1997-08-26 | 1998-02-25 | $7700.00 | Window Closed / Lapsed |