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Fukuhata
Yoshihiro Fukuhata, Takarazuka City JP
| Patent application number | Description | Published |
|---|---|---|
| 20110052285 | FIXING DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME - A fixing device includes a first member. The first member extends along a first longitudinal axis, and has an external surface whose thickness varies along the first longitudinal axis to define at least one first convex portion and at least one first concave portion. A thickness of the first convex portion is larger than a thickness of the first concave portion. A heating source is disposed in the first member. The heating temperature of an inner circumference side of the first convex portion is higher than the heating temperature of the inner circumference side of the first concave portion. | 03-03-2011 |
Yoshihiro Fukuhata, Takarazuka-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20100272481 | IMAGE FORMING METHOD - An image forming method for fixing a toner image on a recording medium by passing the recording medium through a fixing nip defined between a first member and a second member under heat and pressure. The toner has a specific loss elastic modulus. The first and second members extend along respective first and second longitudinal axes, and have respective first and second elastic layers whose thickness vary along the respective first and second longitudinal axes to define at least one convex portion curving outward and at least one concave portion curving inward with respect to each of the respective first and second longitudinal axes. The first convex portion engages the second concave portion and the first concave portion engages the second convex portion, to define the fixing nip therebetween. | 10-28-2010 |
Yoshihiro Fukuhata, Hyogo JP
| Patent application number | Description | Published |
|---|---|---|
| 20100260524 | FUSING APPARATUS AND IMAGE FORMING APPARATUS - A fusing apparatus for fusing a toner image onto a recording medium using heat and pressure includes a fusing roller; an endless pressing belt disposed opposite the fusing roller; and a pressing member for pressing the endless pressing belt onto the fusing roller. A recording medium with a transferred toner image is passed through a fusing nip between the fusing roller and the pressing belt. The fusing roller includes positive and negative crown portions along the axial direction. The pressing member includes convex and concave surface portions along the longitudinal direction. When the pressing member is pressed onto the fusing roller, the positive and negative crown portions of the fusing roller are engaged with the concave and convex surface portions, respectively, of the pressing member. The pressing member exerts a greater pressing force on the fusing roller at a central portion than at an end portion. | 10-14-2010 |
Yoshihiro Fukuhata, Takaraduka-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20100178089 | FIXING DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME - A fixing device includes a first member and a second member. The first member extends along a first longitudinal axis, and has a first elastic layer whose thickness varies along the first longitudinal axis to define at least one first convex portion and at least one first concave portion. The second member extends along a second longitudinal axis parallel to the first longitudinal axis, and has a second elastic layer whose thickness varies along the second longitudinal axis to define at least one second convex portion and at least one second concave portion. At least one of the first and second members is heated, and at least one of the first and second members is pressed against the other, with the first convex portion engaging the second concave portion and the first concave portion engaging the second convex portion, to define a fixing nip therebetween. | 07-15-2010 |