EP0630739A1
Expired / Lapsed
EP
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Wide endless belt
Assignee: Mitsuboshi Belting Ltd
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Filing: 1994-06-20
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Granted: —
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Expires: 2014-06-20
Abstract
Abstract An endless belt (40) having an inside surface (100), an outside surface (102), a length (L) and a width (W). The belt has a canvas core layer (104), an elastomer layer (108) outside of the canvas core layer (104), a surface canvas layer (106) that is expansible lengthwise of the belt outside of the elastomer layer (108), and structure applied on the surface canvas layer and exposed on the outside surface of the endless belt to resist bonding of foreign material thereto.
Inventors
- 👤 Kazutoshi Fujishiro
- 👤 Yasuo Sumiyoshi
- 👤 Masaaki Asazuma
- 👤 Hiroshi Katsura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 20:28
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/26; B31F1/28; B31F1/2845; B31F1/2877; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/088; B65; B65G; B65G15/00; B65G15/30; B65G15/32; B65G15/34; D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0036; B65G2201/00; B65G2201/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24562; Y10T428/2457; Y10T428/24579; Y10T428/24595; Y10T428/24603; Y10T428/24612; Y10T428/24628; Y10T428/24636; Y10T428/29; Y10T428/2982; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3602; Y10T442/3642; Y10T442/365; Y10T442/3854; Y10T442/3878
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
71 words
An endless belt having an inside surface, an outside surface, a length, and a width, said endless belt comprising: a canvas core layer; an elastomer layer outside the canvas core layer; a surface canvas layer that is expansible lengthwise of the belt outside the elastomer layer; and means applied on the surface canvas layer and exposed on the outside surface of the endless belt to resist bonding of foreign material thereto.
Claim 2
Dependent Claim
31 words
The endless belt according to claim 1, wherein the belt width is 1200 to 3000mm and the thickness between the inside and outside surfaces of the belt is less than 3.5mm.
Claim 3
Dependent Claim
21 words
The endless belt according to claim 1 or claim 2, wherein the canvas core layer is seamless along the length thereof.
Claim 4
Dependent Claim
21 words
The endless belt according to claim 1, 2 or 3, wherein the canvas core layer is seamless along the width thereof.
Claim 5
Dependent Claim
43 words
The endless belt according to any preceding claim, wherein the canvas core layer is defined by warp cords having a density of 10-50 cords per 5cm of belt width and weft cords having a density of 10-50 cords per 5cm of belt length.
Claim 6
Dependent Claim
28 words
The endless belt according to claim 5, wherein the density of cords is within ± 0.5 cords/5cm throughout the entire length and width of the canvas core layer.
Claim 7
Dependent Claim
49 words
The endless belt according to claim 5 or claim 6, wherein at least one of the warp and weft cords is defined by fibre filaments combined to produce yarns having a denier of 1000-2000, with the at least one of the warp and weft cords defined by 2-10 yarns.
Claim 8
Dependent Claim
24 words
The endless belt according to claim 7, wherein there are warp cords that are made up of S direction cords and Z direction cords.
Claim 9
Dependent Claim
61 words
The endless belt according to any preceding claim, wherein the surface canvas layer is defined by warp and weft cords with at least one of the warp and weft cords defined by a) 1-3 twisted threads of 100-300 denier made from para base aramid fibre and b)Number 20-40 spun yarn defined by 1-4 twisted threads made from meta base aramid fibre.
Claim 10
Dependent Claim
35 words
The endless belt according to claim 9, wherein the threads of the warp cords are blended with urethane elastic fibre thread having a denier of 140 per thread with there being 100-400 threads per 5cm.
Claim 11
Dependent Claim
40 words
The endless belt according to any preceding claim, wherein the elastomer layer comprises one of a rubber and synthetic resin including at least one of styrene butadiene rubber, ethylene propylene rubber, butyl rubber, fluororubber, hydrogenated nitrile rubber, and polytetra fluoroethylene.
Claim 12
Dependent Claim
51 words
The endless belt according to claim 11, wherein there are reinforcing fibres embedded in the elastomer layer, said reinforcing fibres having a length of 2-20mm and being present in the elastomer layer in an amount of 5-30 weight parts per 100 weight parts of the one of rubber and synthetic resin.
Claim 13
Dependent Claim
21 words
The endless belt according to claim 12, wherein the reinforcing fibres are at least one of aromatic polyamide, cotton and polyester.
Claim 14
Dependent Claim
25 words
The endless belt according to any preceding claim, wherein the means applied on the surface canvas layer comprises a coating on the surface canvas layer.
Claim 15
Dependent Claim
14 words
The endless belt according to claim 14, wherein the coating is approximately 0.01-0.5mm thick.
Claim 16
Dependent Claim
23 words
The endless belt according to claim 14 or claim 15, wherein the coating is a blend of an elastomer with powdered fluorine plastic.
Claim 17
Dependent Claim
63 words
The endless belt according to claim 16, wherein at least one of the elastomer layer and the elastomer in the coating is a heat resistant elastomer that is at least one of rubber and synthetic resin that is at least one of a) hydrogenated nitrile rubber, b) styrene butadiene rubber, c) ethylene propylene rubber, d) butyl rubber, e) fluororubber, and f) polytetra fluoroethylene.
Claim 18
Dependent Claim
45 words
The endless belt according to claim 16 or claim 17, wherein the fluorine plastic is at least one of 4-ethylene fluoride, 3-ethylene fluoride, 2-ethylene fluoride, and a fluorine plastic having a melting point below 200°C which is melted at the vulcanization temperature of the elastomer.
Claim 19
Dependent Claim
27 words
The endless belt according to claim 16, 17 or 18, wherein the fluorine plastic is present in an amount of 300-1000 parts per 100 parts of elastomer.
Claim 20
Dependent Claim
22 words
The endless belt according to any of claims 16 to 19, wherein the coating is applied in an amount of 100-500 g/m².
Claim 21
Dependent Claim
28 words
The endless belt according to any preceding claim, wherein the outside surface of the belt has a coefficient of friction of less than 0.3 with respect to iron.
Claim 22
Dependent Claim
22 words
The endless belt according to any preceding claim, wherein the belt has a strength of at least 400 kgf/cm of belt width.
Claim 23
Dependent Claim
35 words
The endless belt according to any preceding claim, wherein the belt has an elastic coefficient in the lengthwise direction of at least 8000 kgf/cm of width at a temperature range of between 23° and 150°C.
Claim 24
Dependent Claim
36 words
The endless belt according to any preceding claim, wherein the creep elongation of the belt is less than 2.5% at 23°C and less than 4.0% at 150°C under a load of 50 kgf/cm of belt width.
Claim 25
Dependent Claim
29 words
The endless belt according to any preceding claim, wherein the ratio between the lengthwise elastic coefficient and the widthwise elastic coefficient for the belt is between 0.7 and 1.5.
Claim 26
Dependent Claim
23 words
The endless belt according to any preceding claim, wherein the surface canvas layer and the canvas core layer abut directly the elastomer layer.
Claim 27
Dependent Claim
40 words
The endless belt according to any preceding claim in combination with a plurality of rollers around which the belt is trained, there further being means for heating at least one of the belt and at least one of the rollers.
Claim 28
Dependent Claim
69 words
The endless belt according to any of claims 1 to 37 or the combination of claim 38 in combination with a plurality of rollers around which the belt is trained and a cylindrical roll having radially projecting teeth, there being means for mounting the cylindrical roll relative to the belt so that the cylindrical roll can be rotated to press the teeth against the outside surface of the belt.
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