Abstract:
A sheet conveying device, which is included in an image forming apparatus, includes a sheet holding roller to move while holding a sheet, a detector to perform a primary detection to detect a sheet position before the sheet holding roller holds the sheet and a secondary detection to detect a sheet position downstream from the sheet position detected by the primary detection, and a controller configured to cause the sheet holding roller to perform a first drive to move the sheet holding roller in at least one direction of a width direction of the sheet and a rotation direction in a sheet conveying surface based on a result of the primary detection and a second drive to move the sheet holding roller opposite to the at least one direction of the first drive, based on a result of the secondary detection.
Abstract:
A sheet conveying device includes a sheet pickup body, a first sheet conveyor, and a second sheet conveyor, which are disposed in this order along a sheet conveyance direction, and circuitry. The first sheet conveyor includes a first sheet feed roller, a second sheet feed roller, and a first motor. The second sheet conveyor includes a conveyance roller and a second motor. The circuitry is configured to determine a sheet conveyance state of a sheet based on at least one of torque of the first motor of the first sheet conveyor and torque of the second motor of the second sheet conveyor. The first sheet conveyor is configured to interpose the sheet between the first sheet feed roller and the second sheet feed roller and convey the sheet to the second sheet conveyor as the first sheet feed roller rotates.
Abstract:
A sheet conveying device, which is included in an image forming apparatus, includes a detector to detect a lateral end face of a sheet, a first pair of rollers to hold and convey the sheet and swing in a direction parallel to a plane of the sheet, a second pair of rollers to convey the sheet together with the first pair of rollers, and a controller to rotate the first pair of rollers to multiple angles, detect time changes at each angle at the lateral end face while conveying the sheet, and determine a home position corresponding to a position where respective rates of the time changes of the sheet at the first and second nip regions are substantially identical to each other or a home position having a least difference of rates of the time changes of the sheet at the first and second nip regions.
Abstract:
A sheet conveying device, which is incorporated in an image forming apparatus, includes a first detector to detect an angle deviation of a recording medium to a sheet conveying direction, a second detector to detect a lateral shift of the recording medium to a width direction, a third detector to detect at least one of the angle deviation and the lateral shift after correction of the angle deviation detected by the first detector and the lateral shift detected by the second detector, and a rotary body to perform a primary movement by (1) rotating in the sheet conveying direction and returning to a reference position and by (2) moving in the width direction and returning to the reference position, and a secondary movement by performing at least one of (1) and (2) after the primary movement.
Abstract:
A sheet conveying device, which is incorporated in an image forming apparatus, includes a first detector to detect an angle deviation of a recording medium to a sheet conveying direction, a second detector to detect a lateral shift of the recording medium to a width direction, a third detector to detect at least one of the angle deviation and the lateral shift after correction of the angle deviation detected by the first detector and the lateral shift detected by the second detector, and a rotary body to perform a primary movement by (1) rotating in the sheet conveying direction and returning to a reference position and by (2) moving in the width direction and returning to the reference position, and a secondary movement by performing at least one of (1) and (2) after the primary movement.
Abstract:
An intermediate transfer device including an intermediate transfer body having a primary transfer portion and a secondary transfer portion which bears a secondary image formed by transferring a primary image from an image bearing member; a pair of secondary transfer rollers having a secondary transfer roller and a support roller provided in contact with each other via the intermediate transfer body at the secondary transfer portion, which transfers the secondary image to a recording medium at the secondary transfer portion; a variation detection device that detects an amount of variance occurring to a transfer rotation body when the recording medium is transferred to the secondary transfer portion; and an adjustment device that adjusts the distance between the pair of the secondary transfer rollers according to the amount of variance detected by the variation detection device.
Abstract:
A position detecting device includes a plurality of detecting units that detects marks on an object, a plurality of housing units that houses the detecting units, and a holding member that fixedly holds the housing units. A total expansion amount of the housing units due to temperature change is substantially equal to an expansion amount of the holding member between the fixed positions due to temperature change. The total expansion amount represents a total amount of expansion of the housing units from a fixed-position plane including a fixed position to a detection-position plane including a detection position in a direction parallel to a moving direction of the object. The fixed-position plane and the detection-position plane are perpendicular to the moving direction of the object.
Abstract:
A position detecting device includes a plurality of detecting units that detects marks on an object, a plurality of housing units that houses the detecting units, and a holding member that fixedly holds the housing units. A total expansion amount of the housing units due to temperature change is substantially equal to an expansion amount of the holding member between the fixed positions due to temperature change. The total expansion amount represents a total amount of expansion of the housing units from a fixed-position plane including a fixed position to a detection-position plane including a detection position in a direction parallel to a moving direction of the object. The fixed-position plane and the detection-position plane are perpendicular to the moving direction of the object.
Abstract:
A mark detector to detect a plurality of marks which are arranged in a predetermined cycle on a moving member, such as a photo conductor belt, a transfer belt, a paper conveyance belt, a photo conductor drum, a transfer drum, etc. especially in an image forming apparatus, has an optical head including a light source to irradiate a light beam, a beam shaping device to shape the light beam, and a photo acceptor to accept light from the marks. Light beams on the marks from the light source have different positions shifted within a half mark cycle of each other on the marks. This increases accuracy and stability of controlling a motion of the moving member.
Abstract:
An outdoor unit for use in a separate type air conditioner which includes an outdoor unit and an indoor unit each having at least a compressor, a heat exchanger, and a expansion device, with one unit connected with the other by refrigerant-tubes so that they altogether form an air conditioning system. The outdoor unit comprises: a baseplate, a housing having a first air intake window (side air intake window) in one of its side walls, a second air intake window (rear air intake window) formed in the rear wall extending upright from the baseplate, and an air outlet window (front air outlet window) formed in the front wall; a partition board extending upright from the baseplate and portioning for the internal space of the housing into a fan compartment for accommodating the heat exchanger and a fan for supplying air to the heat exchanger; and a machinery compartment for accommodating the compressor. The outdoor unit is characterized in that: the heat exchanger mounted upright on the baseplate extends over the rear air intake window; the partition board is provided in front of the heat exchanger; the partition board is disposed in front of the heat exchanger by securing a peripheral frame of the partition board on the front end of a peripheral frame of the heat exchanger by screws applied from the rear of the heat exchanger.