摘要:
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.
摘要:
A development device has a casing configured with a first frame and a second frame. The first frame includes attachment surfaces to which a regulating member is attached. A facing surface of the second frame is disposed between the attachment surfaces, in a predetermined plane including the attachment surfaces, and configured to face a portion of the regulating member between the attachment surfaces. A seal member is disposed between the regulating member and opposite surfaces including the attachment surfaces and the facing surface, and configured to seal first gaps each of which is formed between the facing surface and one of the attachment surfaces, in a first direction parallel to a rotational axis of a developing member rotatably supported by the casing.
摘要:
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.
摘要:
A developing unit is provided that 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 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.
摘要:
A developer cartridge includes a developer cartridge case for accommodating a developer, a developing roller, a toner layer thickness control blade, and a side sealing member. The developing roller is supported by the developer cartridge case such that a circumferential surface thereof is exposed to an outside of the developer cartridge case along a width direction. The toner layer thickness control blade includes a blade body portion made of a metallic plate. A tip portion of the blade body portion is disposed at a sliding portion of the developing roller and the side sealing member so as to contact with the side sealing member. A frictional heat generated at the sliding portion is released to the outside of the developer cartridge case through the blade body portion in order restrain a leak of the developer as much as possible.
摘要:
Several different apparatuses are provided that can be configured to detect whether a developing cartridge, an image carrier cartridge, and a process cartridge are installed in an image forming apparatus. A shielding member is configured to move between a blocking position where the shielding member blocks light emitted from a detector provided in the main body frame of an image forming apparatus and an unblocking position where the shielding member does not block the light emitted from the detector. The shielding member is in the blocking position when the developing cartridge is removed from an image carrier cartridge and in the unblocking position when the developing cartridge is installed in the image carrier cartridge. Also, an installation detecting device may be provided to determine whether an image carrier cartridge and a developing cartridge are installed in the main body frame based on the amount of the light received by a detector.
摘要:
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.
摘要:
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.
摘要:
An image forming apparatus includes a main body, image formation units disposed in the main body, a moving member disposed in the main body, the moving member including a surface facing each image formation unit, a pair of first stoppers disposed in each image formation unit, and a pair of second stoppers disposed in the main body in correspondence with each image formation unit, each second stopper being configured to prevent the developer on the moving member from entering the image formation unit.
摘要:
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.