Abstract: In one embodiment, an automatic voltage regulator includes a detection instruction unit configured to monitor a generator output voltage, and output an instruction signal when the output voltage of the generator 12 deviates from a predetermined range, the instruction signal being a signal of instructing detection of a specifying parameters generated in a generator field circuit of a generator excitation system; a field-parameter detection unit configured to detect the specifying parameters following to the instruction signal; and a comparison calculator configured to calculate a comparison value between the specifying parameters and a predetermined allowable upper-limit voltage-value of each component constituting the generator excitation system.

Abstract: An image forming apparatus includes a cartridge supporting member configured to move with respect to a main body of the apparatus in a state in which a cartridge is mounted to take a mounting and demounting position where the cartridge supporting member is located at an exterior of the main body and allowing the cartridge to be mounted and demounted, and an image forming position where the cartridge supporting member is located within an interior of the main body to locate the cartridge at a position which allows formation of an image. A first unit of the cartridge includes a position-restricted portion, and the cartridge is located below a second unit in which the cartridge is mounted on the cartridge supporting member. The cartridge supporting member includes a position restricting portion configured to restrict movement of the cartridge with respect to the cartridge supporting member by engaging the position-restricted portion.

Abstract: A rotational axis line of the image bearing member is parallel to a pivotal axis line of the handle. When the handle is grasped, the process cartridge body in a non-used state is inclined so that the image bearing member is positioned upward relative to a horizontal surface, and the process cartridge body from which developer has been consumed is inclined so that the image bearing member is positioned downward relative to the horizontal surface.

Abstract: In one embodiment, a generator includes an alternating current exciter to output first, second and third alternating currents respectively having first, second and third phases, and a rotary rectifier to convert the first, second and third alternating currents into first, second and third direct currents, respectively. The generator further includes a rotating shaft on which the exciter and the rectifier are mounted, and plural conductors mounted on the shaft, and including one or more first conductors, one or more second conductors and one or more third conductors to respectively supply the first, second and third alternating currents from the exciter to the rectifier. The plural conductors include one or more conductor groups in each of which two or more conductors are collectively arranged, and each of the conductor groups includes the two or more conductors arranged to cancel a magnetic field around each conductor in the same group.

Abstract: An image forming apparatus includes a main assembly and a cartridge. The main assembly includes a mounting portion for mounting the cartridge and a door for causing the mounting portion to be in an open state and a closed state. The main assembly or the cartridge includes an expansion and contraction member for displacing at least a part of the cartridge. Opening and closing of the door is interrelated with expansion and contraction of the expansion and contraction member. In the closed state, the cartridge mounted in the mounting portion is in a first position, inside the main assembly, where an image is formable. In the open state, the cartridge mounted in the mounting portion is in a second position where at least a part thereof projects to an outside of the main assembly.

Abstract: An image forming apparatus includes a movement member arranged to move a cartridge and is movable between a first position for disposing the cartridge at a position where image formation is possible and a second position where the cartridge is attachable to and detachable from the movement member. At least one coupling provided in the cartridge is, when the movement member is at the first position, moved to a drive position where the coupling is arranged to engage with a drive member to rotate at least one rotating member, and while the movement member is being moved from the second to first positions, the at least one coupling is at an inclined position.

Abstract: An image forming apparatus includes a cartridge supporting member configured to move with respect to a main body of the apparatus in a state in which a cartridge is mounted to take a mounting and demounting position where the cartridge supporting member is located at an exterior of the main body and allowing the cartridge to be mounted and demounted, and an image forming position where the cartridge supporting member is located within an interior of the main body to locate the cartridge at a position which allows formation of an image. A first unit of the cartridge includes a position-restricted portion, and the cartridge is located below a second unit in which the cartridge is mounted on the cartridge supporting member. The cartridge supporting member includes a position restricting portion configured to restrict movement of the cartridge with respect to the cartridge supporting member by engaging the position-restricted portion.

Abstract: According to one embodiment, there is provided armature windings of a rotating electrical machine, in which a 3-phase winding of two layers including upper and lower layers is constituted of phase belts having an electrical phase difference of 60° in between, pairs of upper coil pieces and lower coil pieces are contained in slots, the number of slots per pole per phase includes a fractional number, and a denominator thereof is an integral number greater than or equal to 4, wherein coil arrangement is carried out such that at least one coil piece in either of the upper or lower coil pieces included in two layers of upper and lower layers in one phase belt is replaced with a coil piece of an adjacent different phase.

Abstract: An image forming apparatus includes a movement member arranged to move a cartridge and is movable between a first position for disposing the cartridge at a position where image formation is possible and a second position where the cartridge is attachable to and detachable from the movement member. At least one coupling provided in the cartridge is, when the movement member is at the first position, moved to a drive position where the coupling is arranged to engage with a drive member to rotate at least one rotating member, and while the movement member is being moved from the second to first positions, the at least one coupling is at an inclined position.

Abstract: A rotational axis line of the image bearing member is parallel to a pivotal axis line of the handle. When the handle is grasped, the process cartridge body in a non-used state is inclined so that the image bearing member is positioned upward relative to a horizontal surface, and the process cartridge body from which developer has been consumed is inclined so that the image bearing member is positioned downward relative to the horizontal surface.

Abstract: An image forming apparatus includes a main assembly and a cartridge. The main assembly includes a mounting portion for mounting the cartridge and a door for causing the mounting portion to be in an open state and a closed state. The main assembly or the cartridge includes an expansion and contraction member for displacing at least a part of the cartridge. Opening and closing of the door is interrelated with expansion and contraction of the expansion and contraction member. In the closed state, the cartridge mounted in the mounting portion is in a first position, inside the main assembly, where an image is formable. In the open state, the cartridge mounted in the mounting portion is in a second position where at least a part thereof projects to an outside of the main assembly.

Abstract: An image forming apparatus includes a cartridge supporting member configured to move with respect to a main body of the apparatus in a state in which a cartridge is mounted to take a mounting and demounting position where the cartridge supporting member is located at an exterior of the main body and allowing the cartridge to be mounted and demounted, and an image forming position where the cartridge supporting member is located within an interior of the main body to locate the cartridge at a position which allows formation of an image. A first unit of the cartridge includes a position-restricted portion, and the cartridge is located below a second unit in which the cartridge is mounted on the cartridge supporting member. The cartridge supporting member includes a position restricting portion configured to restrict movement of the cartridge with respect to the cartridge supporting member by engaging the position-restricted portion.

Abstract: An image forming apparatus includes a movement member arranged to move a cartridge and is movable between a first position for disposing the cartridge at a position where image formation is possible and a second position where the cartridge is attachable to and detachable from the movement member. At least one coupling provided in the cartridge is, when the movement member is at the first position, moved to a drive position where the coupling is arranged to engage with a drive member to rotate at least one rotating member, and while the movement member is being moved from the second to first positions, the at least one coupling is at an inclined position.

Abstract: A toner storage unit provided in an image forming apparatus that enables a user to replace the toner storage unit when the user opens the door of the image forming apparatus, moves a developing cartridge in a direction corresponding to removal of the developing cartridge, and places the developing cartridge in the toner storage unit replacement position where the toner storage unit can be removed and replaced.

Abstract: An image forming apparatus includes an image forming apparatus body and a cartridge attachable to and detachable from the image forming apparatus body. The cartridge includes a handle portion attached to the case body and grasped when attached to and detached from the image forming apparatus body. The handle portion can be positioned at a first position at which the handle portion protrudes beyond the case body, a second position at which the handle portion is closer to the case body than in the case where the handle portion is at the first position and the cartridge that has been attached to the image forming apparatus body comes into contact with the open-close portion when the open-close portion is closed, and a third position at which the handle portion is closer to the case body than in the case where the handle portion is at the second position.

Abstract: In one embodiment, a generator includes an alternating current exciter to output first, second and third alternating currents respectively having first, second and third phases, and a rotary rectifier to convert the first, second and third alternating currents into first, second and third direct currents, respectively. The generator further includes a rotating shaft on which the exciter and the rectifier are mounted, and plural conductors mounted on the shaft, and including one or more first conductors, one or more second conductors and one or more third conductors to respectively supply the first, second and third alternating currents from the exciter to the rectifier. The plural conductors include one or more conductor groups in each of which two or more conductors are collectively arranged, and each of the conductor groups includes the two or more conductors arranged to cancel a magnetic field around each conductor in the same group.

Abstract: In an image forming apparatus including a door 10 openable with respect to a main assembly of the image forming apparatus, a drum cartridge 8 detachably mountable to the image forming apparatus main assembly, and detachably mountable developing cartridges 4k-4y provided above the drum cartridge 8, wherein the door 10 includes a positioning urging portion 26 contacting the developing cartridges in a state in which the door 10 is closed, the door 10 includes drum cartridge mounting and demounting guides 28R and 28L for regulating the drum cartridge 8 so as to pass along a non-interference path with the positioning urging portion 26 in contact to the drum cartridge 8 when the drum cartridge 8 is demounted from the image forming apparatus.

Abstract: Provided is an image forming apparatus. The image forming apparatus is provided with guide portions to be used to mount a cartridge group including plural cartridges in the image forming apparatus. Some of the guide portions are used also to mount an alternative cartridge, which is configured to occupy two or more of plural mounting spaces, in the image forming apparatus.

Abstract: According to one embodiment, there is provided armature windings of a rotating electrical machine, in which a 3-phase winding of two layers including upper and lower layers is constituted of phase belts having an electrical phase difference of 60° in between, pairs of upper coil pieces and lower coil pieces are contained in slots, the number of slots per pole per phase includes a fractional number, and a denominator thereof is an integral number greater than or equal to 4, wherein coil arrangement is carried out such that at least one coil piece in either of the upper or lower coil pieces included in two layers of upper and lower layers in one phase belt is replaced with a coil piece of an adjacent different phase.

Abstract: Provided is an image forming apparatus. The image forming apparatus is provided with guide portions to be used to mount a cartridge group including plural cartridges in the image forming apparatus. Some of the guide portions are used also to mount an alternative cartridge, which is configured to occupy two or more of plural mounting spaces, in the image forming apparatus.