EP0147170A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Film resistor heater
Assignee: Proterial Ltd
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Filing: 1984-12-19
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Granted: —
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Expires: 2004-12-19
Abstract
Abstract A film resistor heater (17) comprising a ceramic resistor film (22) with NiCr particles dispersed within the insulating ceramic matrix. The film resistor heater may further comprise a substrate to be heated (16), a bonding layer (18), an insulating layer (20) and a protective layer (24). The film resistor heater may be prepared by spraying, particularly by plasma spraying. It may be used advantageously for domes- tic electric appliances such as hot plates, rice cookers and vacuum kettles, and for electrostatic copier heat rolls.
Inventors
- 👤 Yasuo Tsukuda
- 👤 Hisao Hara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 07:13
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
18 words
A film resistor heater (17) characterized in that it comprises NiCr particles dispersed within an insulating ceramic matrix.
Claim 2
Dependent Claim
18 words
A film resistor heater (17) characterized in that it comprises NiCr particles dispersed within an insulating ceramic matrix.
Claim 3
Dependent Claim
67 words
A film resistor heater (17) comprising: (a) a bonding layer (18) formed on a substrate to be heated (16); (b) an insulating layer (20) formed on said bonding layer (18); (c) a resistor layer (22) formed on said insulating layer (20), which resistor layer comprises N iCr particles dispersed in an insulating ceramic matrix; and, optionally, (d) a protective layer (24) formed on said resistor layer (22).
Claim 4
Dependent Claim
67 words
A film resistor heater (17) comprising: (a) a bonding layer (18) formed on a substrate to be heated (16); (b) an insulating layer (20) formed on said bonding layer (18); (c) a resistor layer (22) formed on said insulating layer (20), which resistor layer comprises N iCr particles dispersed in an insulating ceramic matrix; and, optionally, (d) a protective layer (24) formed on said resistor layer (22).
Claim 5
Dependent Claim
20 words
3 e A film resistor heater according to claim 2, wherein said resistor layer (22) is formed by plasma spraying.
Claim 6
Dependent Claim
24 words
A film resistor heater according to any one of claims 1 to 3, wherein said insulating ceramic matrix comprises A1 2 0 3 .
Claim 7
Dependent Claim
24 words
A film resistor heater according to any one of claims 1 to 3, wherein said insulating ceramic matrix comprises Al 2 O 3 .MgO.
Claim 8
Dependent Claim
26 words
A film resistor heater according to any one of claims 1 to 5, wherein said NiCr particles are dispersed substantially uniformly within said insulating ceramic matrix.
Claim 9
Dependent Claim
17 words
A film resistor heater according to any one of claims 1 to 6, wherein NiCr constitutes from
Claim 10
Dependent Claim
14 words
1 to 30% of the weight of said particles and said insulating ceramic matrix.
Claim 11
Dependent Claim
14 words
1 to 30% of the weight of said particles and said insulating ceramic matrix.
Claim 12
Independent Claim
66 words
A method of manufacturing a film resistor heater which method comprises the steps of: (a) forming a bonding layer (18) on the surface of a substrate to be heated (16); (b) forming on said bonding layer (18) an insulating layer (20); and (c) forming on said insulating layer (20) a resistor layer (22) having NiCr particles dispersed within the insulating matrix of said resistor layer (22).
Claim 13
Independent Claim
66 words
A method of manufacturing a film resistor heater which method comprises the steps of: (a) forming a bonding layer (18) on the surface of a substrate to be heated (16); (b) forming on said bonding layer (18) an insulating layer (20); and (c) forming on said insulating layer (20) a resistor layer (22) having NiCr particles dispersed within the insulating matrix of said resistor layer (22).
Claim 14
Dependent Claim
33 words
A method according to claim 8, wherein step (c) comprises spraying a mixture comprising pulverulent NiCr and pulverulent A1 2 0 3 or Al 2 O 3 .MgO onto said insulating layer (20).
Claim 15
Independent Claim
27 words
A method according to either of claims 8 and 9, wherein said bonding layer (18), insulating layer (20) and resistor layer (22) are formed by plasma spraying.
Claim 16
Independent Claim
61 words
A method according to any one of claims 8 to 10, further comprising the steps of: (d) forming a pair of electrodes (38, 40) at the ends of said resistor layer (22); (e) connecting a wire (42) to each of said electrodes (38, 40); and, optionally, (f) forming a protective layer (24) of humidity- resistant material on said resistor layer (22).
Claim 17
Dependent Claim
19 words
An electrical heating appliance comprising a film resistor heater as claimed in any one of claims 1 to 7.
References Cited (Backward Citations)
No citation records indexed.
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