摘要:
An image forming apparatus may include a first tray configured to accommodate one or more recording sheets to be supplied to an image forming unit, a body frame configured to position an upper part of the first tray, and an expansion members disposed under the body frame to position a lower part of the first tray. The expansion member may include a transmission mechanism configured to be engagable with a body-side gear provided in the body frame. The transmission mechanism may be configured to transmit a drive force, which is transmitted from a drive source provided in the body frame via the body-side gear, to an add-on mechanism, when the transmission mechanism is engaged with the body-side gear.
摘要:
A developing apparatus 130 is accommodated within a laser printer 100. The developing apparatus 130 includes a developing casing 131 and a toner electric field transport body 132. The toner electric field transport body 132 includes a transport wiring substrate 133 and a transport-substrate support member 134. A plurality of transport electrodes 133b are provided on the transport wiring substrate 133. The transport wiring substrate 133 is supported by the transport-substrate support member 134 in a state in which the transport wiring substrate 133 is deformed in a tubular shape. Further, the transport wiring substrate 133 is supported by the transport-substrate support member 134 such that margin areas of the transport wiring substrate 133, which are opposite end portions of the transport wiring substrate 133 with respect to a sub-scanning direction and in which the transport electrodes 133b are not formed, are separated from a tonner transport path.
摘要:
An image forming apparatus is provided that includes a swing member swinging between a first position where a force for moving a pressing plate upward is transmitted to the pressing plate and a second position where transmission of the force is interrupted, a latchet mechanism that forbids the pressing plate to move downward and includes a latchet gear rotating in conjunction with a motion of the pressing plate and a latching member that is movably attached to the swing member and configured to forbid rotation of the latchet gear by engaging with the latchet gear, and a pressing member that applies a pressing force to the latching member when the swing member is in the second position and does not apply the pressing force to the latching member, and render the latching member movable relative to the swing member when the swing member is in the first position.
摘要:
An image forming apparatus is provided, which includes a controller configured to determine a moment for switching a circumferential velocity of a development roller to a first circumferential velocity from a second circumferential velocity lower than the first circumferential velocity based on a moment when the controller issues to a sheet feeding unit an instruction to start feeding of a sheet, and to determine a moment for switching the circumferential velocity of the development roller to the second circumferential velocity from the first circumferential velocity based on a moment when a first detector detects existence of the sheet ejected from a registration roller.
摘要:
A fixing device for fixing a developed image of developer onto a recording sheet by heating and fusing the developer includes a heating roller, a pressure roller and a driving force input element. The heating roller is configured to be heated by a heat source, such as a halogen heater. The pressure roller is disposed adjacent to the heating roller, such that a recording sheet is fed and conveyed between the pressure roller and the heating roller. The driving force input element is fixed to the pressure roller for causing the pressure roller to rotate. A diameter Dp of the pressure roller and a nip width N between the heating roller and the pressure roller in circumferential directions thereof have a relationship represented by the following expression: 0.24
摘要:
A gear system is provided. The gear system includes a driven gear, which is rotated by driving force from a driving gear, a base member to support the driven gear, and a bearing structure, including a shaft and a shaft hole to rotatably support the shaft, by which the driven gear is rotatably attached to the base member. One of the shaft and the shaft hole is provided to the driven gear, and the other of the shaft and the shaft hole is provided to the base member. The bearing structure has a lubricant reservoir in a slidable section, in which the shaft and the shaft hole are slidably in contact with each other when the driven gear is rotated by the driving force from the driving gear, the lubricant reservoir containing lubricant to lubricate the slidable section.
摘要:
An image forming device includes a frame, a photosensitive drum, a developing roller, a transfer roller, a heating roller, a backup roller, a peeling claw, and a protection member. The photosensitive drum has a surface on which a latent image is formable. The developing roller develops the latent image to provide a toner image. The transfer roller transfers the toner image onto a recording medium. The heating roller has a heating surface and a shaft supported to the frame and extending in a direction. The backup roller has a shaft supported to the frame and extending in the direction. The backup roller is in pressure contact with the heating roller. The peeling claw has a tip end in sliding contact with the heating surface of the heating roller. The protection member is configured to protect the peeling claw and prevent a user from accessing to the peeling claw.
摘要:
A developing apparatus 130 is accommodated within a laser printer 100. The developing apparatus 130 includes a developing casing 131 and a toner electric field transport body 132. The toner electric field transport body 132 includes a transport wiring substrate 133 and a transport-substrate support member 134. A plurality of transport electrodes 133b are provided on the transport wiring substrate 133. The transport wiring substrate 133 is supported by the transport-substrate support member 134 in a state in which the transport wiring substrate 133 is deformed in a tubular shape. Further, the transport wiring substrate 133 is supported by the transport-substrate support member 134 such that margin areas of the transport wiring substrate 133, which are opposite end portions of the transport wiring substrate 133 with respect to a sub-scanning direction and in which the transport electrodes 133b are not formed, are separated from a toner transport path.
摘要:
A fixing device has a frame, a heating roller, a press roller, a peeler, a guide member, a first bias unit, and a wheel. The heating roller is provided to the frame to produce heat, the heating roller having a roller rotation axis and a cylindrical surface. The press roller is pressed against the cylindrical surface to feed a recording medium together with the heating roller along a feeding path. The peeler is provided to the frame having a peeling surface having a leading edge. The leading edge faces the cylindrical surface to peel off the recording medium on the cylindrical surface. The peeling surface faces the feeding path. The guide member is positioned facing the peeling surface to guide the recording medium which has passed through between the heating roller and the press roller to downstream of the feeding path. The guide member is movable between a near position and a far position, the near position being closer to the peeling surface than the far position. The first bias unit biases the guide member to the near position. The wheel is supported to the frame and having a wheel rotation axis and a circumferential edge. The wheel rotation axis is parallel to the roller rotation axis. The wheel is positioned in a manner that a part of the circumferential edge protrudes from the peeling surface to the guiding member in a virtual plane perpendicular to the wheel rotation axis.
摘要:
An image forming apparatus is provided, which includes a controller configured to switch a circumferential velocity of a development roller from a second circumferential velocity to a first circumferential velocity no later than when development of a photoconductive drum is started and to switch the circumferential velocity of the development roller from the first circumferential velocity to the second circumferential velocity after the development of the photoconductive drum is completed.