Konica Corporation

Konica Minolta Business Technologies, Inc.

Konica Minolta, Inc.

Shinji Morita

Kouichi Takaki

Shinichi Nagao

Ryo Hasegawa

Akitoshi Matsubara

Akira Kosugi

Masao Itoh

Yuji Okugawa

Junichi Otani

Atsushi Fujita

Naoji Kamimura

Satoshi Shibuya

Junya Ichikawa

Yasuo Tsurubuchi

Takeshi Komurasaki

An image forming apparatus capable of executing a single-sided recording mode in which an image is recorded on one side of a recording medium and a double-sided recording mode in which an image is recorded on both sides of the recording medium, the image forming apparatus includes: a first temperature adjustment device that adjusts a temperature of the recording medium; an inkjet head that ejects ink onto a surface of the recording medium; a reverse unit that reverses front and back surfaces of the recording medium by switching a conveying direction of the recording medium when the double-sided recording mode is executed; a second temperature adjustment device that controls the temperature of the recording medium in which the front and back surfaces are reversed; and a control device that controls at least one of the first and second temperature adjustment devices.

Image forming apparatus, method for controlling image forming apparatus, and control program for image forming apparatus

An inkjet recording device includes an intermediate transfer belt, a discharger, a driving belt, a supporting member, and an adhesion unit. The intermediate transfer belt is endless and supports an intermediate image. The discharger forms the intermediate image by discharging ink onto an outer face of the intermediate transfer belt. The driving belt is endless and arranged on an inner side of the intermediate transfer belt and drives the intermediate transfer belt to run. The supporting member is arranged on an inner side of the driving belt to support the intermediate transfer belt and has a plane which is parallel to the discharger and which contacts an inner face of the driving belt facing the outer face of the driving belt and covering the area of ejection by the discharger. The adhesion unit causes the intermediate transfer belt and the driving belt to adhere to one another.

Inkjet recording device

The image forming apparatus has a drive shaft; a drive coupling supported in an axial direction to couple the drive shaft and a flange with play; a taper coupling supported inside the drive coupling with play to hold the drive shaft and the flange; and a pressing member for pressing the taper coupling, which consists of a tip portion having a tapered chuck structure and coming in surface contact with the drive shaft and the flange by the elastic force of the tapered chuck structure and the pressing force of the pressing member, and an axial portion having a cylindrical structure whose outer diameter is smaller than the inner diameter of the drive coupling.

Image forming apparatus

An image forming apparatus capable of obtaining a good image quality without color shifts is described. The image forming apparatus includes a drive couplingwhich couples a drive shaftand a flangeof an image bearing memberwith a play, a taper couplingsupported inside the drive couplingfor holding the drive shaftand the flange, and a pressing member. The taper couplingincludes a tip portion, an axial portion, a rear end portion. The drive couplingincludes claw portionsengaging with the flangeof the image bearing member, and a body portionhaving a length which is shorter than the distance between the flangeof the image bearing memberand the rear endof the taper couplingin the axial direction of the drive shaft

An image forming apparatus A includes: a light irradiation devicewhich irradiates laser light; an image carrying bodywhich is exposed to the laser light to form a latent image on the exposed portion; and an abutting memberwhich is fastened to the light irradiation device in abutting contact with a stationary member F for defining a reference position. The abutting memberchanges in volume due to temperature fluctuation, and the light irradiation devicemoves with respect to the stationary member F, in an opposite direction to a focal point shift which has taken place along an irradiation direction of the laser light due to the temperature fluctuation.

A scanning optical device that scans a photoreceptor with laser light includes a light source, a light outputting section, and a projection. The laser light from the light source is output through the light outputting section so that the photoreceptor is irradiated with the laser light. The projection projects through a partition wall toward the photoreceptor. The light outputting section is disposed in a position separated from the photoreceptor by the partition wall. The projection contains a polygon motor that rotates a polygon mirror to reflect the laser light.

Scanning optical device that scans photoreceptor with laser light and image forming apparatus

A mirror unit of an exposure device includes: a mirror having support points including one support point on one end portion in a longitudinal direction thereof and two support points at two portions in a width direction perpendicular to the longitudinal direction on the other end portion thereof; and a mirror base member that holds the mirror in a way to support the mirror at the three support points, wherein the mirror is arranged so that the support point on a side of the one support point and a support point on one side of the two support points is positioned on a scanning optical axis, and so that the longitudinal direction is tilted from the scanning optical axis in the width direction.

Mirror unit of exposure device and image forming apparatus using mirror unit

An image forming apparatus, including: an image carrier; an exposure section, having a light emitting surface which is positioned above the image carrier, to focus the light rays on the surface of the image carrier; a cleaning section, having a cleaning member, to make the cleaning member to come into contact with the light emitting surface and to move the cleaning member on the light emitting surface, so that the cleaning member removes dust particles accumulated on the light emitting surface, wherein the cleaning section makes the cleaning member to move to an outside of an end portion of the light emitting surface; and a dust receiving section, mounted under the outside of the end portion of the light emitting surface, to receive the dust particles removed from the light emitting surface by the cleaning section.

An image forming apparatus is disclosed. The image forming apparatus includes a photoconductor, an exposure device to expose the photoconductor, a dustproofing member arranged more upstream than an exposure position of the exposure device in a moving direction of the photoconductor, and a cover which supports the exposure device and dustproofing member. The cover opens around a pivot shaft which is arranged more upstream than the exposure device in the moving direction of the photoconductor.

Image forming apparatus having a dust proofing member for an exposure device

The invention concerns a clock-generating circuit, which generates dot clock pulses for driving a light-emitting element employed in an optical-writing section of an image-forming apparatus and has a function of canceling f&thgr; property errors caused by a f&thgr; lens employed in the image-forming apparatus. The clock-generating circuit includes a digital-delay dot clock adjusting section to adjust timings of rising-edges or falling-edges of the dot clock pulses generated by changing a selection for a plurality of delayed-clock pulses, which are generated by delaying clock-pulses, outputted from a reference oscillator, in slightly different delay times; and a controlling section to control a selecting operation for the plurality of delayed clock pulses, performed in the digital-delay dot clock adjusting section, so as to compensate for f&thgr; property errors caused by the f&thgr; lens employed in the optical-writing section.

Clock-generating circuit and image-forming apparatus having a function of canceling F-theta property errors

The invention concerns a clock-generating circuit, which generates dot clock pulses for driving a light-emitting element employed in an optical-writing section of an image-forming apparatus and has a function of canceling unevenness of scanning-light amount caused by variations of transmittances and reflectances in the optical-writing section when a polygon mirror scans a laser beam. The clock-generating circuit includes a digital-delay dot clock adjusting section to adjust timings of rising-edges or falling-edges of the dot clock pulses generated by changing a selection for a plurality of delayed-clock pulses, which are generated by delaying clock-pulses, outputted from a reference oscillator, in slightly different delay times; and a controlling section to control a selecting operation for the plurality of delayed clock pulses, performed in the digital-delay dot clock adjusting section, so as to compensate for unevenness of scanning-light amount caused by the variations of transmittances and reflectances in the optical-writing section.

Clock-generating circuit and image-forming apparatus having a function of canceling unevenness of scanning-light amount

An optical deflection device includes: a rotor having reflection surfaces on a cirumferential surface thereof; a bearing for rotatably supporting the rotor; a magnet fixed on the rotor; a supporting member for supporting the bearing, on which a radiating fin is integrally formed; and a coil fixed on the supporting member at a position where the coil faces the magnet for forming a magnetic field.

Optical deflection device and image forming apparatus therewith

An image forming apparatus includes a photoreceptor; a plurality of laser beam generation means for generating a plurality of laser beams, respectively; and an optical system in which the plurality of laser beams pass through and scan simultaneously a plurality of lines on the photoreceptor, and thereby dot images are formed on the photoreceptor. The difference in wavelength among the plurality of laser beams is less than a diameter of one dot of laser beam.

An image forming apparatus, such as a copying machine or a printer having a two-beam optical scanning unit, includes a pair of semiconductor laser beam emitters, each emitter generating a respective laser beam. A beam composition prism composes the two laser beams and a photoreceptor is provided for holding an image written with the two laser beams. A defector deflects the two laser beams onto the photoreceptor in a primary scanning direction so that the two laser beams are emitted on a primary scanning plane. Two supporting members each respectively supports one of the pair of semiconductor laser beam emitters. A moving member is provided for moving at least one of the two supporting members so that at least one of the two laser beams is movably adjusted so as to have a predetermined emitting direction.

Growing community of inventors

Kunitachi, Japan

Shinji Morita