EP0837014A1
Expired / Lapsed
EP
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Conveying belt and method of forming the belt
Assignee: Mitsuboshi Belting Ltd
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Filing: 1997-10-21
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Granted: —
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Expires: 2017-10-21
Abstract
Abstract A conveying belt has a core and a canvas layer attached to the core. The canvas layer has a first surface facing the core and a second surface facing oppositely to the first surface. The canvas layer has a thickness between the first and second surfaces. The canvas layer is treated with fluororesin so that the second surface is impregnated with fluororesin and only part of the thickness between the first and second surfaces is impregnated with fluororesin.
Inventors
- 👤 Kazutoshi Fujishiro
- 👤 Yoshinori Furukawa
- 👤 Hiroyuki Ito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 15:37
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/26; B31F1/28; B31F1/2845; B31F1/2877; 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; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2189; Y10T442/2279; Y10T442/2287; Y10T442/2311; Y10T442/232; Y10T442/2861; Y10T442/2893
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
79 words
A conveying belt comprising: a core; and a canvas layer attached to the core, the canvas layer having a first surface facing the core and a second surface
facing oppositely to the first surface, the canvas layer having a thickness between the first and second surfaces, the canvas layer being treated with fluororesin so that the second surface is
impregnated with fluororesin and only a part of the thickness between the first and
second surfaces is impregnated with fluororesin.
Claim 2
Dependent Claim
20 words
The conveying belt according to claim 1 wherein the first surface of
the canvas layer is not impregnated with fluororesin.
Claim 3
Dependent Claim
33 words
The conveying belt according to claim 1 wherein the canvas layer is
not impregnated with fluororesin from the first surface to approximately one-half
of
the thickness between the first surface and second surface.
Claim 4
Dependent Claim
17 words
The conveying belt according to claim 1 wherein the canvas layer
comprises a high density woven canvas.
Claim 5
Dependent Claim
14 words
The conveying belt according to claim 1 wherein the core comprises
a canvas layer.
Claim 6
Dependent Claim
34 words
The conveying belt according to claim 5 wherein the conveying belt
has a length and a width and the core canvas layer is seamless over the entire length
and width of the conveying belt.
Claim 7
Dependent Claim
28 words
The conveying belt according to claim 1 wherein the conveying belt
has a length and a width and the canvas layer is extensible lengthwise of the
conveying belt.
Claim 8
Dependent Claim
19 words
The conveying belt according to claim 7 wherein the canvas layer is
attached to the core through an elastomer.
Claim 9
Dependent Claim
44 words
The conveying belt according to claim 1 wherein the conveying belt
has a length and width, the width of the conveying belt is on the order of 1200 to
3000 mm and the conveying belt has a thickness on the order of 3.5 mm.
Claim 10
Dependent Claim
27 words
The conveying belt according to claim 1 wherein the fluororesin
comprises at least one of: tetra-fluoroethylene-per fluoroalkylvinylether copolymer)
(PFA); tetrafluoroethylene-hexafluoropropylene copolymer (FEP); polytetrafluoroethylene
(PTFE); and polychlorotrifluoroethylene (PCTFE).
Claim 11
Dependent Claim
37 words
The conveying belt according to claim 10 wherein the second surface
and part of the thickness of the canvas layer are impregnated with fluororesin by
fusion-depositing a fluororesin film onto the second surface of the canvas layer.
Claim 12
Dependent Claim
51 words
The conveying belt according to claim 10 wherein the second surface
and part of the thickness of the canvas layer are impregnated with fluororesin by
applying a fluororesin dispersion onto the second surface and thereafter subjecting
the canvas layer to at least one of a firing and a heat press treatment.
Claim 13
Dependent Claim
49 words
The conveying belt according to claim 12 wherein the second surface
and part of the thickness of the canvas layer are impregnated with fluororesin by
depositing a fluororesin film onto the second surface after subjecting the canvas
layer to the at least one of firing and heat press treatment.
Claim 14
Dependent Claim
27 words
The conveying belt according to claim 1 wherein the core comprises
a woven canvas comprising at least one of aromatic polyamide fiber yarn and
polyetheretherketone fiber yarn.
Claim 15
Dependent Claim
32 words
The conveying belt according to claim 1 wherein the core comprises
canvas that is woven by one of a plain weave, a matt weave, twill elastic webbing,
and a satin weave process.
Claim 16
Dependent Claim
46 words
The conveying belt according to claim 15 wherein the core canvas
comprises woven cords each formed by twisting two to ten yarns, each having a
denier of 1000 to 2000 and 50 to 100 twists/m with a cord density of 10 to 50 per 5
cm.
Claim 17
Dependent Claim
51 words
The conveying belt according to claim 1 wherein an elastomer layer
is provided between the core and canvas layer, said elastomer layer comprising at
least one of rubber and a synthetic resin comprising at least one of styrene-butadiene
rubber, ethylene propylene rubber, butyl rubber, hydrogenated nitrile rubber,
fluorine rubber, and polytetrafluoroethylene.
Claim 18
Dependent Claim
63 words
The conveying belt according to claim 17 further comprising fibers
embedded in the elastomer layer, said fibers having a length on the order of 2-20mm,
comprising at least one of aromatic polyamide fibers, cotton fibers, and
polyester fibers, and present in an amount of 5-30 weight parts of fiber per 100
weight parts of the at least one of rubber and synthetic resin.
Claim 19
Dependent Claim
27 words
The conveying belt according to claim 1 wherein the longitudinal
cords of the canvas layer comprise a mixed-twisted yarn of aromatic polyamide fiber
and urethane elastic fiber.
Claim 20
Dependent Claim
57 words
The conveying belt according to claim 1 wherein the lateral cords of
the canvas layer comprise one of a) yarns that comprise at least one of aromatic
polyamide fiber yarn, nylon fiber yarn, and polyester yarn that are woven by one of
plain weaving, twill elastic webbing and satin weaving and b) knitted aromatic
polyamide fiber yarn.
Claim 21
Dependent Claim
24 words
The conveying belt according to claim 1 wherein the canvas layer
comprises para-aramid fiber yarn having a size of 100-300 denier with 1-3
twists.
Claim 22
Dependent Claim
27 words
The conveying belt according to claim 1 wherein the canvas layer
comprises meta-aramid fiber yarn having a size of from 20-40 yarn number count
with 1-4 twists.
Claim 23
Dependent Claim
29 words
The conveying belt according to claim 19 wherein the yarn comprises
urethane elastic fiber yarn of 140 denier per yarn and a count of 100-140
yarns per
5 cm.
Claim 24
Dependent Claim
23 words
The conveying belt according to claim 20 wherein the yarns comprise
para-aramid fiber yarn having a size of 100-300 denier with 1-3 twists.
Claim 25
Dependent Claim
26 words
The conveying belt according to claim 20 wherein the yarns comprise
meta-aramid fiber yarns having a size of 20-40 spinning yarn number count and 1-4
twists.
Claim 26
Dependent Claim
40 words
The conveying belt according to claim 20 wherein the yarns comprise
at least one of nylon fiber yarn and polyester fiber yarn having a size of from 100-300
denier, 1-3 twists, and a count of from 70-100 per 5 cm.
Claim 27
Dependent Claim
56 words
The conveying belt according to claim 1 wherein at least one of the
core and canvas layer comprises fibers that are at least one of a) para-aramid
fiber
that is sold commercially under one of the trademarks TWARON™, KEVLAR™,
TECHNORA™ and b) meta-aramid fiber that is sold commercially under one of the
trademarks CORNEX™ and NOMEX™.
Claim 28
Independent Claim
96 words
A method of forming and using a conveying belt, said method
comprising the steps of: providing a canvas layer having first and second oppositely facing surfaces
between which a thickness is defined; impregnating the second surface and only a part of the thickness between the
first and second surfaces with a fluororesin; joining the canvas layer with at least one belt component to define a
completed belt with the second surface exposed; and conveying an object by engaging the second surface with the object and
advancing the conveying belt to hereby cause conveying of the object.
Claim 29
Dependent Claim
35 words
The method of forming and using a conveying belt according to claim
28 wherein the impregnating step comprises the step of impregnating by fusion-depositing
a fluororesin film onto the second surface of the canvas layer.
Claim 30
Dependent Claim
49 words
The method of forming and using a conveying belt according to claim
28 wherein the impregnating step comprises the step of impregnating by applying
a fluororesin dispersion onto the second surface and thereafter subjecting the canvas
layer to at least one of a firing and a heat press treatment.
Claim 31
Dependent Claim
47 words
The method of forming and using a conveying belt according to claim
28 wherein the impregnating step comprises the step of impregnating by depositing
a fluororesin dispersion onto the second surface after subjecting the canvas layer to
the at least one of firing and heat press treatment.
References Cited (Backward Citations)
FR2386634A1
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US4224372A
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GB2106031A
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GB2106557A
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DE4026339A1
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EP0624738A1
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EP0630739A1
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JPH0760877A
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