Patent application number | Description | Published |
20090190952 | Developing Device - A developing device is provided. The developing device includes a housing, a developing agent carrier, and a developing agent leakage prevention member. The developing agent leakage prevention member has a first layer that is configured to contact an outer circumferential surface of a longitudinal end of the developing agent carrier; a second layer that is superimposed on the first layer and is configured to contact a portion of the housing; and an adhesive layer that is interposed between the first layer and the second layer, the adhesive layer partially bonding a first opposing surface of the first layer opposing the second layer to a second opposing surface of the second layer opposing the first layer such that an unbonded area where the first opposing surface and the second opposing surface are not bonded together is produced. | 07-30-2009 |
20090274481 | Developing Unit - A developing unit is provided, which include: a developer carrier; a housing; and a side sealing member disposed between an end part of the developer carrier and a portion of the housing adjacent to a supply port. The side sealing member includes an upstream side seal and a downstream side seal. The upstream side seal is configured to convey a developer on the upstream side seal in an oblique direction toward the supply port and the downstream side. The downstream side seal is configured to convey a developer on the downstream side seal in a direction toward the downstream side. | 11-05-2009 |
20090274482 | Developing Unit and Side Seal Member - A developing unit is provided, which includes: a developer carrier; a housing; and a side sealing member disposed between an end part of the developer carrier and a portion of the housing adjacent to a supply port. The side sealing member includes an elastic member having an integral base part attached to the portion of the housing and plural integral projections protruding from the base part toward the developer carrier in a protruding direction. A distal end part of each of the projection has an inclination face inclined so that a part of the inclination face is closer to the supply port as the part of the inclination face is farther from the base part in the protruding direction. | 11-05-2009 |
20100092206 | Developing Device - A developing device includes a developer carrier which carries a developer, a developing unit housing which rotatably supports the developer carrier, a side seal member which comes into slidable contact with both ends of the developer carrier, a sheet-like elongated seal member which extends in the axial direction of the developer carrier so as to come into slidable contact with the developer carrier, a side seal attachment surface which is formed in the developing unit housing and to which the side seal member is attached, and a support portion which is formed in the developing unit housing and protrudes toward the developer carrier from the side seal attachment surface to support the elongated seal member. The elongated seal member is attached onto the support portion in a state where both ends thereof overlap the side seal member and are opposite the side seal attachment surface. A filler is filled in a gap surrounded by the elongated seal member, the side seal member, the support portion, and the side seal attachment surface. A protrusion for suppressing the spread of the filler is formed at the side seal attachment surface at a predetermined interval from the support portion. | 04-15-2010 |
20110255901 | Developing Device and Image Forming Apparatus - A developing device comprising: a developing roller; a casing that includes a developer storage unit; a roller supporting unit and an opening; and a seal member that is mounted on the casing outside the opening in the central axis direction and faces an end portion of the developing roller, the seal member configured to rub against the end portion of the developing roller when the seal member is elastically deformed, wherein the casing includes: an outer projection that is provided along a moving direction of the developing roller to abut on an outer end portion of the seal member, the outer projection protruding in a position which is inside the roller supporting unit; and an inner projection provided along the outer projection so as to abut on an inner end portion of the seal member, the inner projection protruding in a position which is outside the opening. | 10-20-2011 |
20120251190 | DEVELOPING CARTRIDGE - Developing cartridge includes doctor blade in contact with developer carrying member. The doctor blade includes supporting plate having proximal end portion and distal end portion. Pressing portion is provided on the distal end portion to define contacting portion at which the doctor blade contacts surface of the developer carrying member. The pressing portion has end face extending in a direction away from the developer carrying member from the contacting portion and facing an upstream side in rotational direction of the developer carrying member. The proximal end portion is positioned downstream from the contacting portion in the rotational direction of the developer carrying member. Angle a between the end face and a plane tangent to the contacting portion, at a position in proximity to the developer carrying member, is not smaller than 90 degrees, as viewed in cross section orthogonal to axis of rotation of the developer carrying member. | 10-04-2012 |
20120269538 | Developing Device - A developing device includes a developer carrier, a developing unit housing which rotatably supports the developer carrier, a side seal member which comes into slidable contact with both ends of the developer carrier, a sheet-like elongated seal member which extends in the axial direction of the developer carrier so as to come into slidable contact with the developer carrier, a side seal attachment surface which is formed in the developing unit housing and to which the side seal member is attached, and a support portion which is formed in the developing unit housing and protrudes toward the developer carrier from the side seal attachment surface to support the elongated seal member. The elongated seal member is attached onto the support portion in a state where both ends thereof overlap the side seal member and are opposite the side seal attachment surface. | 10-25-2012 |
20120269539 | Developing Device - A developing device includes a developer carrier, a developing unit housing which rotatably supports the developer carrier, a side seal member which comes into slidable contact with both ends of the developer carrier, a sheet-like elongated seal member which extends in the axial direction of the developer carrier so as to come into slidable contact with the developer carrier, a side seal attachment surface which is formed in the developing unit housing and to which the side seal member is attached, and a support portion which is formed in the developing unit housing and protrudes toward the developer carrier from the side seal attachment surface to support the elongated seal member. The elongated seal member is attached onto the support portion in a state where both ends thereof overlap the side seal member and are opposite the side seal attachment surface. | 10-25-2012 |
20140105635 | Casing Projections of an Image Forming Apparatus Configured to Support a Seal of a Developing Device - A developing device for an image forming apparatus may include a seal and a casing to prevent leakage of developer. In some examples, the seal member may include multiple side surfaces while the casing may include projections that may abut and contact various surfaces of the seal member. According to one arrangement, the casing may include first, second and third protrusions, where each protrusion is configured to abut and contact a corresponding surface of the seal member. Additionally, the second projection may protrude in a position inside of the first projection while the third projection may protrude in a position between the first and second projections. | 04-17-2014 |
20150086236 | Developing Cartridge - A developing cartridge includes a housing configured to accommodate a developing agent and including a first frame and a second frame, a developing agent carrying member rotatable on an axial line and configured to carry the developing agent, and a layer thickness regulating member configured to regulate a layer thickness of the developing agent carried by the developing agent carrying member. The first frame has a first facing surface facing the layer thickness regulating member. The second frame has a second facing surface facing the layer thickness regulating member. A welded region where the first frame and the second frame are welded and include a first welded portion extending from the first facing surface in a first direction intersecting with and away from the first facing surface, and a second welded portion extending from the first welded portion inward in a second direction intersecting with the first direction. | 03-26-2015 |
20150086237 | Developing Unit - A developing unit includes a housing, a developing roller and a seal contacting an outer peripheral surface of the developing roller. The seal includes a first part disposed inward in an axial line direction of the developing roller and contacting the outer peripheral surface of the developing roller, and a second part contacting an outer edge of the first part in the axial line direction and disposed outward from the first part in the axial line direction and contacting the outer peripheral surface. The first part has a contact surface contacting the developing roller and a plurality of first grooves each of which is recessed from the contact surface and extends along the contact surface. The plurality of first grooves extends from outward to inward in the axial line direction, as the plurality of first grooves extends from upstream to downstream in a rotational direction of the developing roller. | 03-26-2015 |