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US 2009/0214263 A1Published application
Image forming apparatus, and developing device and developing unit thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsJong In KIM, Myoung-Su BAEK, Oh Dug GWON
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Abstract
An image forming apparatus includes developing units designed to have an appropriate developer storage capacity in consideration of developer consumption, and improved convenience of use. The image forming apparatus also includes an image carrier, and plural developing units arranged along a rotating direction of the image carrier to supply developers to the image carrier. The plural developing units include a first developing unit having the largest developer storage capacity and a second developing unit having the second largest developer storage capacity after the first developing unit.
Claims48
An image forming apparatus, comprising:
- an image carrier;
- and
- plural developing units arranged along a rotating direction of the image carrier, to supply developer to the image carrier,
- wherein the plural developing units include a first developing unit having a largest developer storage capacity and a second developing unit disposed at the farthest downstream side with respect to the rotating direction of the image carrier, the second developing unit having a developer storage capacity smaller than the developer storage capacity of the first developing unit and larger than a developer storage capacity of the remaining developing units.
1 more element
An image forming apparatus, comprising:
- a photosensitive member;
- a light scanning device to scan light to the photosensitive member so as to form an electrostatic latent image;
- and
- plural developing units arranged along a rotating direction of the photosensitive member,
- wherein the plural developing units include a first developing unit including a developer storage portion having a first volume, a second developing unit including a developer storage portion having a second volume less than the first volume, and at least one third developing unit including a developer storage portion having a third volume less than the second volume, and
- the second developing unit is disposed at the farthest downstream side with respect to the rotating direction of the photosensitive member.
3 more elements
An image forming apparatus, comprising:
- plural developing units respectively including photosensitive members and adapted to supply developers to the respective photosensitive members;
- a light scanning device to scan light to the respective photosensitive members so as to form electrostatic latent images;
- and
- an intermediate transfer member to hold images transferred from the photosensitive members,
- wherein the plural developing units include a first developing unit including a developer storage portion having a first volume, a second developing unit including a developer storage portion having a second volume less than the first volume, and at least one third developing unit including a developer storage portion having a third volume less than the second volume, and the second developing unit is disposed at the farthest downstream side with respect to a rotating direction of the intermediate transfer member.
2 more elements
A developing device usable with an image forming apparatus to supply developer to a rotating image carrier, the developing device comprising:
- plural developing units arranged parallel and adjacent to one another along a rotating direction of the image carrier,
- wherein the plural developing units include a first developing unit having a largest developer storage capacity and a second developing unit disposed at the farthest downstream side with respect to the rotating direction of the image carrier, the second developing unit having a developer storage capacity smaller than the developer storage capacity of the first developing unit and larger than a developer storage capacity of the remaining developing units.
An image forming apparatus, comprising:
- plural developing units arranged parallel and adjacent to one another along a rotating direction of an image carrier, at least one of the developing units having a different developer storage capacity from the developer storage capacity of the remaining developing units;
- and
- carrying portions provided at the respective developing units, to receive residual developer not attached to the image carrier,
- wherein the farthest upstream carrying portion, formed at one of the developing units disposed at the farthest upstream side with respect to the rotating direction of the image carrier, protrudes the farthest toward the image carrier than the carrying portions formed at the remaining developing units.
1 more element
An image forming apparatus, comprising:
- plural developing units arranged parallel and adjacent to one another along a rotating direction of an image carrier and respectively including developing members to attach developers to the image carrier, at least one of the developing units having a different developer storage capacity;
- and
- carrying portions integrally formed with the developing units at positions underneath the developing members, to receive residual developers not attached to the image carrier therein.
A developing unit usable with an image forming apparatus, the developing unit comprising:
- a developer storage capacity smaller than a developer storage capacity of a first developing unit provided to supply black developer to an image carrier and larger than a developer storage capacity of a second developing unit provided to supply second-color developer to the image carrier,
- wherein the developing unit is disposed at the farthest downstream side of the first and second developing units arranged parallel and adjacent to one another along a rotating direction of the image carrier, and provided to supply first-color developer to the image carrier.
A developing unit to store black developer usable with an image forming apparatus having first and second developing units arranged parallel and adjacent to one another other along a rotating direction of an image carrier, the developing unit comprising:
- a developer storage capacity larger than a developer storage capacity of the first developing unit, the developer storage capacity of the developing unit is larger than a developer storage capacity of a second developing unit disposed at the farthest downstream side with respect to the rotating direction of the image carrier,
- wherein the developing unit is disposed upstream of a first developing unit provided to supply first-color developer to the image carrier.
A developing unit usable with an image forming apparatus having first and second developing units arranged parallel and adjacent to one another other along a rotating direction of an image carrier, the developing unit comprising:
- a developer storage capacity smaller than a developer storage capacity of a first developing unit provided to supply black developer to the image carrier, the developer storage capacity of the developing unit is smaller than a developer storage capacity of a second developing unit disposed at the farthest downstream side with respect to the rotating direction of the image carrier,
- wherein the developing unit is disposed between the first developing unit and the second developing unit in the rotating direction of the image carrier.
A developing unit usable with an image forming apparatus, the developing unit comprising:
- a developing unit housing;
- a developer storage portion provided in the developing unit housing;
- a developing member to attach developer received in the developer storage portion to an image carrier;
- and
- a carrying portion provided underneath the developing member and extending to the front side of the developing unit housing so as not to interfere with the image carrier, the carrying portion receiving residual developer not attached to the image carrier by the developing member.
2 more elements
A developing unit usable with an image forming apparatus, the developing unit comprising:
- a developing unit housing;
- a developer storage portion provided in the developing unit housing;
- a developing member to attach developer received in the developer storage portion to an image carrier;
- a carrying portion provided underneath the developing member and extending to the front side of the developing unit housing so as not to interfere with the image carrier, the carrying portion receiving residual developer not attached to the image carrier by the developing member;
- and
- a developer shield provided along a longitudinal direction of the developing member and having one side fixed to the carrying portion and an other side adjacent to the developing member.
3 more elements
An image forming apparatus, comprising:
- plural developing units arranged parallel and adjacent to one another other along a rotating direction of an image carrier, at least one of the developing units having a different developer storage capacity,
- wherein each developing unit is provided to supply the developer to the image carrier by a feeding angle that is an acute angle less than half of an angle of repose of the developer relative to a horizontal plane.
An image forming apparatus, comprising:
- an image carrier having a rotating direction;
- and
- a plurality of developing units having developer storage capacities and carrying portions to receive residual developer,
- wherein one of the plurality of developing units disposed at the farthest upstream side with respect to the rotating direction of the image carrier has a respective developer storage capacity more than at least one of the remaining developing units, and a respective carrying portion that protrudes toward the image carrier more than other carrying portions of the remaining developing units.
1 more element
Dependencies are inferred from the claim text.