EP0546495A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fixing heater and method of manufacturing fixing heater
Assignee: Toshiba Lighting and Technology Corp
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Filing: 1992-12-08
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Granted: —
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Expires: 2012-12-08
Abstract
Abstract A fixing heater comprises a substrate (1) having an insulative property and a heat generating member (2) with electrical resistance printed on a surface of the substrate. (1) The heat generating member is a film-like shape having a direction and a pair of edge portions opposing one another, wherein one of the edge portions is trimmed in the direction. The heat generating member has a heat generating portion having opposing one and another edge portions, wherein one of the edge portions is trimmed in the direction throughout the heat generating portion. The heat generating portion is trimmed so as to provide the trimmed edge having partially different width along the direction. The fixing heater is manufactured by trimming one edge of the heat generating member in the direction throughout the heat generating portion and further trimming the trimmed edge on the basis of an amount of a resistance value change of the heat generating member before and after or during the former trimming step to obtain a predetermined resistance value or resistance value distribution. The trimming steps are performed by means of laser beam. A generating temperature controlling portion may be formed to the heat generating member. (Fig. 1A, 1B)
Inventors
- 👤 Shigehiro Sato
- 👤 Yoshiyuki Matsunaga
- 👤 Tsuyoshi Ono
- 👤 Takaaki Karube
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:13
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/16; G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
61 words
A fixing heater comprising: a substrate having an insulative property; and a heat generating member with electrical resistance printed on a surface of said substrate, said heat generating member being a film-like shape having a direction and a pair of edge portions opposing one another along said direction, wherein one of said pair of edge portions is trimmed along said direction.
Claim 2
Dependent Claim
61 words
A fixing heater comprising: a substrate having an insulative property; and a heat generating member with electrical resistance printed on a surface of said substrate, said heat generating member being a film-like shape having a direction and a pair of edge portions opposing one another along said direction, wherein one of said pair of edge portions is trimmed along said direction.
Claim 3
Dependent Claim
23 words
A fixing heater according to claim 1, wherein electrode means are further disposed in contact with end portions of the heat generating member.
Claim 4
Dependent Claim
29 words
A fixing heater according to claim 1, wherein said heat generating member is trimmed so as to provide the trimmed edge portion having partially different width along said direction.
Claim 5
Dependent Claim
76 words
A fixing heater comprising: a substrate having an insulative property; and a heat generating member with electrical resistance printed on a surface of said substrate, said heat generating member being a film-like shape having a heat generating portion having a direction and a pair of edge portions opposing one another along said direction, wherein one of said pair of edge portions is trimmed along said direction throughout the heat generating portion of the heat generating member.
Claim 6
Dependent Claim
76 words
A fixing heater comprising: a substrate having an insulative property; and a heat generating member with electrical resistance printed on a surface of said substrate, said heat generating member being a film-like shape having a heat generating portion having a direction and a pair of edge portions opposing one another along said direction, wherein one of said pair of edge portions is trimmed along said direction throughout the heat generating portion of the heat generating member.
Claim 7
Dependent Claim
23 words
A fixing heater according to claim 4, wherein electrode means are further disposed in contact with end portions of the heat generating member.
Claim 8
Dependent Claim
29 words
A fixing heater according to claim 4, wherein said heat generating portion is trimmed so as to provide the trimmed edge portion having partially different width along said direction.
Claim 9
Independent Claim
69 words
A method of manufacuring a fixing heater comprising the steps of: preparing a substrate; printing a heat generating member on a surface of the substrate, said heat generating member having a heat generating portion having a direction and a pair of edge portions opposing one another; and trimming one of said pair of edge portions for changing value of electricl resistance along said direction throughout the heat generating portion.
Claim 10
Independent Claim
69 words
A method of manufacuring a fixing heater comprising the steps of: preparing a substrate; printing a heat generating member on a surface of the substrate, said heat generating member having a heat generating portion having a direction and a pair of edge portions opposing one another; and trimming one of said pair of edge portions for changing value of electricl resistance along said direction throughout the heat generating portion.
Claim 11
Dependent Claim
45 words
A method according to claim 7, further comprising the step of further trimming the trimmed edge portion on the basis of an amount of resistance value change of the heat generating member before and after the former trimming step to obtain a predetermined resistance value.
Claim 12
Dependent Claim
46 words
A method according to claim 7, further comprising the step of further trimming the trimmed edge portion on the basis of an amount of resistance value change of the heat generating member during the former trimming step to obtain a predetermined distribution of the resistance value.
Claim 13
Dependent Claim
17 words
A method according to claim 7, wherein said trimming steps are performed by means of laser beam.
Claim 14
Dependent Claim
107 words
A fixing heater comprising: a substrate having an insulative property; a heat generating member with electrical resistance printed on a surface of said substrate, said heat generating member being a film-like shape having a heat generating portion having a direction and a pair of edge portions opposing one another along said direction, wherein one of said pair of edge portions is trimmed along said direction throughout the heat generating portion of the heat generating member; and means provided for the heat generating member for controlling a distribution of a temperature to be generated, said controlling means being formed to another edge portion of the heat generating portion.
Claim 15
Dependent Claim
107 words
A fixing heater comprising: a substrate having an insulative property; a heat generating member with electrical resistance printed on a surface of said substrate, said heat generating member being a film-like shape having a heat generating portion having a direction and a pair of edge portions opposing one another along said direction, wherein one of said pair of edge portions is trimmed along said direction throughout the heat generating portion of the heat generating member; and means provided for the heat generating member for controlling a distribution of a temperature to be generated, said controlling means being formed to another edge portion of the heat generating portion.
Claim 16
Dependent Claim
23 words
A fixing heater according to claim 11, wherein said temperature controlling means is formed by reducing a width of the heat generating portion.
Claim 17
Dependent Claim
30 words
A fixing heater according to claim 12, wherein said temperature controlling means is formed to portions near the end portions of the heat generating portion of the heat generating member.
Claim 18
Dependent Claim
23 words
A fixing heater according to claim 13, wherein electrode means are further disposed in contact with end portions of the heat generating member.
Claim 19
Dependent Claim
29 words
A fixing heater according to claim 11, wherein said heat generating portion is trimmed so as to provide the trimmed edge portion having partially different width along said direction.
Claim 20
Dependent Claim
73 words
A fixing heater comprising: a substrate having an insulative property; a heat generating member with electrical resistance printed on a surface of said substrate, said heat generating member being a film-like shape having a direction and a pair of edge portions opposing one another edge portions; and powder adhering on the surface of the substrate along said direction, said powder being composed of the same material as that of the heat generating member.
Claim 21
Dependent Claim
73 words
A fixing heater comprising: a substrate having an insulative property; a heat generating member with electrical resistance printed on a surface of said substrate, said heat generating member being a film-like shape having a direction and a pair of edge portions opposing one another edge portions; and powder adhering on the surface of the substrate along said direction, said powder being composed of the same material as that of the heat generating member.
Claim 22
Dependent Claim
45 words
A fixing heater according to claim 16, wherein one of said pair of edge portions of the heat generating member is trimmed along said direction and said powder is formed of the material of the heat generating member fused and spattered by the laser-trimming treatment.
Claim 23
Dependent Claim
82 words
A fixing heater comprising: a substrate having an insulative property; a heat generating member with electrical resistance printed on a surface of said substrate, said heat generating member being a film-like shape having a heat generating portion having direction and a pair of edge portions opposing one another edge portions; and powder adhering on the surface of the substrate along said direction throughout the heat generating direction, said powder being composed of the same material as that of the heat generating member.
Claim 24
Dependent Claim
82 words
A fixing heater comprising: a substrate having an insulative property; a heat generating member with electrical resistance printed on a surface of said substrate, said heat generating member being a film-like shape having a heat generating portion having direction and a pair of edge portions opposing one another edge portions; and powder adhering on the surface of the substrate along said direction throughout the heat generating direction, said powder being composed of the same material as that of the heat generating member.
Claim 25
Dependent Claim
46 words
A fixing heater according to claim 18, wherein one of said pair of edge portions of the heat generating member is trimmed along said direction and said powder is formed of the material of the heat generating member fused and spattered by the laser- trimming treatment.
References Cited (Backward Citations)
No citation records indexed.
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