US4736226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixing device
Assignee: Konica Minolta Inc
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Filing: 1985-12-03
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Granted: 1988-04-05
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Expires: 2005-12-03
Abstract
Abstract A fixing device including a fixing roller and a pressure member rotatable in pressure-contact with said fixing roller, out of which at least one is provided with a heater and is capable of fixing an image-recorded material bearing thereon, toner is passed through between said fixing roller and said pressure member; said fixing device characterized in that at least one of said heaters is made in the bar-like form and served as a supporting shaft for rotating said fixing roller or said pressure member and can further be taken out and put in.
Inventors
- 👤 Michio Mogi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:20
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2064
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
90 words
A fixing device comprising a fixing roller, a rotatable pressure member in pressure contact with said fixing roller, at least one of said roller and said member having a primary heater adapted to heat an image-recording material which passes between said roller and said member, said primary heater being substantially bar-shaped and having at least its ends of circular cross-section, said ends mounted in bearings, said bearings disposed between said heater and said roller or said member, said heater being detachable from and rotatably supporting said roller or said member.
Claim 2
Dependent Claim
90 words
A fixing device comprising a fixing roller, a rotatable pressure member in pressure contact with said fixing roller, at least one of said roller and said member having a primary heater adapted to heat an image-recording material which passes between said roller and said member, said primary heater being substantially bar-shaped and having at least its ends of circular cross-section, said ends mounted in bearings, said bearings disposed between said heater and said roller or said member, said heater being detachable from and rotatably supporting said roller or said member.
Claim 3
Dependent Claim
22 words
The device of claim 1 wherein said primary heater is in said roller and there is a secondary heater in said member.
Claim 4
Dependent Claim
19 words
The device of claim 1 wherein said heater comprises an outer cylinder and a heat generator within said cylinder.
Claim 5
Dependent Claim
10 words
The device of claim 3 wherein said cylinder is metal.
Claim 6
Dependent Claim
24 words
The device of claim 1 wherein lead wires electrically connecting said heater to a heat generator are attached at only one of said ends.
Claim 7
Dependent Claim
17 words
The device of claim 1 wherein heat insulating material is interposed between said heater and said bearing.
Claim 8
Dependent Claim
55 words
The device of claim 1 wherein there is a first position in which said roller and said member are in pressure contact with each other and a second position wherein said roller and said member are not in pressure contact, said heater being releasable from said roller or said member only in said second position.
Claim 9
Dependent Claim
12 words
The device of claim 1 wherein said heater is in said roller.
Claim 10
Dependent Claim
12 words
The device of claim 1 wherein said heater is in said member.
Claim 11
Dependent Claim
90 words
A fixing device comprising a fixing roller having a first heater, a rotatable pressure roller in pressure contact with said fixing roller, a second heater inserted through said pressure roller, said second heater being detachable from and incorporated in a receiving member, said second heater and said receiving member being fixed, said receiving member being held by a swingable lever, a bearing between said second heater and said pressure roller and between said receiving member and said pressure roller, said receiving member rotatably supporting said pressure roller through said bearing.
Claim 12
Dependent Claim
90 words
A fixing device comprising a fixing roller having a first heater, a rotatable pressure roller in pressure contact with said fixing roller, a second heater inserted through said pressure roller, said second heater being detachable from and incorporated in a receiving member, said second heater and said receiving member being fixed, said receiving member being held by a swingable lever, a bearing between said second heater and said pressure roller and between said receiving member and said pressure roller, said receiving member rotatably supporting said pressure roller through said bearing.
Claim 13
Dependent Claim
19 words
The device of claim 10 wherein said heater comprises an outer cylinder and a heat generator within said cylinder.
Claim 14
Dependent Claim
10 words
The device of claim 11 wherein said cylinder is metal.
Claim 15
Dependent Claim
24 words
The device of claim 10 wherein lead wires electrically connecting said heater to a heat generator are attached at only one of said ends.
Claim 16
Dependent Claim
17 words
The device of claim 10 wherein heat insulating material is interposed between said heater and said bearing.
Claim 17
Dependent Claim
55 words
The device of claim 10 wherein there is a first position in which said roller and said member are in pressure contact with each other and a second position wherein said roller and said member are not in pressure contact, said heater being releasable from said roller or said member only in said second position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |