Minolta Company, Ltd.

Konica Minolta Business Technologies, Inc.

Ken Tanino

Yasuhiro Ohno

Toshiya Natsuhara

Masami Miyazaki

Masahiro Anno

Makoto Fujii

Yoshinobu Kudo

Hiromu Mukai

Kohtaro Hayashi

Nobuharu Murashima

Eiichi Sano

Akira Funahashi

Hirokazu Yagura

Makoto Ando

Yoshito Konishi

Yoshinori Tanaka

Junichi Tanii

Shigeru Wada

Ikushi Nakamura

Yoshihiro Fukuhata

Takuya Ueno

Kazuo Mohri

Shoukou Gon

An induction heating device for inductively heating an object to be heated which is formed of conductive material has a holder. The device also has a coil for inductively heating the object. The coil is supported by the holder. The coil is composed of a plurality of turns of conductor forming a layer, which is positioned along the object. Between conductor sections of the coil through which electric currents respectively flow in the same direction is formed a gap through which temperature of the object is detected. The device is capable of accurately detecting the temperature of heating region of the object, at low cost, and capable of increasing stability and safety in control of the temperature.

Induction heating device, induction heating fixing device and image forming apparatus

An induction heating device for inductively heating an object to be heated which is formed of conductive material has a holder. The holder is positioned outside the object. The device has an exciting coil for inductively heating the object. The exciting coil is supported by the holder. The exciting coil is composed of a plurality of turns of conductor forming a layer, which is positioned along the object. The device also has a demagnetizing coil which is positioned along the layer of the exciting coil. In the demagnetizing coil, a back electromotive force is induced in accordance with a magnetic field produced by the exciting coil, so as to cancel the magnetic field. Stability in the temperature control for the object such as a heating roller can be improved by effective function of the demagnetizing coil. The device can be miniaturized and configured at low cost.

A heat fixing device for heat fixing a toner image to a receiving medium having a pair of fixing belts in an endless form; a pair of rotary members individually disposed on a respective inside circumference of the fixing belts and pressed against each other via the fixing belts; a pair of fixing members individually disposed on the respective inside circumference of the fixing belts and pressed against each other via the fixing belts; and a heating element for heating at least one of the fixing belts, wherein the fixing belts contact the rotary members and the fixing members only at a respective portion thereof via which the respective pair of rotary members and fixing members are pressed against each other.

Heat fixing device and image forming apparatus

The fixing device of the present invention comprises a heating roller having an internal heating device; a flexible fixing belt wrapped around the exterior side of the heating roller and having a circumferential length longer than the circumferential length of the heating roller; and a pressure roller for pressing against the heating roller through the fixing belt, wherein a slack part of the fixing belt is formed on the downstream side from the pressure contact part between the heating roller and the pressure roller in the direction of transport of the recording medium, such that this slack part touches the exterior surface of the pressure roller.

Fixing device provided with a fixing belt

The present invention related to a toner used in a toner-jetting system wherein the toner is jettingly adhered to a recording medium in a direct manner, the toner having a specific cohesion degree, a specific distribution of a particle size and/or a specific mean roundness.

Toner for toner-jetting

The present invention related to a toner used in a toner-jetting system wherein the toner is jettingly adhered to a recording medium in a direct manner, the toner having a specific aerated bulk density, a specific distribution of a particle size and/or a specific mean roundness.

The present invention related to a toner used in a toner-jetting system wherein the toner is jettingly adhered to a recording medium in a direct manner, the toner having a specific angle of repose, a specific mean roundness and/or a specific distribution of a particle size.

The present invention relates to a toner used in a toner-jetting system wherein the toner is jettingly adhered to a recording medium in a direct manner, said toner satisfying a specific relationship between an average quantity of charge (x)(&mgr;C/g) and a distribution deviation of quantity of charge (y).

An ink-jet printer of the invention comprises a print head having nozzles for ejecting an ink material therefrom, a carriage supporting the print head, and a adjust mechanism adjusting a relative position between the print head and the carriage. According to the invention, the relative position of nozzles with respect to the carriage can be adjusted by the adjust mechanism after the print head has been attached to the carriage. Therefore, great precision is not required when attaching the print head to the carriage, simplifying its assembling.

Ink-jet printer

A viewfinding system for use with an optical system that creates a first object image includes an objective block which is sealed as a unit. The objective block includes a focusing screen for forming the first object image and relay optics for transmitting the first object image. A zoom block includes a zoom optical system for providing a modification of the magnification of the first object image to provide a second object image. An eyepiece block receives the second object image and includes a reflecting member and an eyepiece through which the second object image is observed. The eyepiece block is sealed and the second object image is realized within the sealed eyepiece block.

Zoom viewfinder system for single reflex camera

A motor drive system is provided with two drive units so that the system may be driven not only by operating one of the drive units but by simultaneously operating both of the drive units in accordance with load condition. Both of the first and second drive units are provided with a motor and a gear reduction mechanism. The output gear of the second drive unit is mounted as a planetary gear of a planetary gear mechanism on the carrier. When the current is supplied simultaneously to both the motor of the first drive unit and to the motor of the second drive unit, the output gear of the first drive unit comes into mesh with the output gear of the second drive unit, combining the output forces of the first and second drive units to drive the load driving shaft. When the use of only the first drive unit is required to drive the load, the motor of the second drive unit is rotated reversely to move the carrier of the planetary gear mechanism to a refuge position, where the output gear of the second drive unit is de-meshed from the output gear of the first drive unit.

Motor drive system

A zoom viewfinder system for a single reflex camera comprises a relay optical system through which said first object image is formed as a second object image and plural reflecting members for reflecting light rays of said first object image, wherein the reflecting members except one reflecting member provided closest to a first object image is moved in order to adjust an angle of light rays of the first object image to the reflecting members. The zoom viewfinder system also comprises a holder for holding the reflecting members located parallel in the relay optical system in order to determine relative positions of the reflecting members precisely. The zoom viewfinder system further comprises holding members for holding plural parts of an optical system respectively, wherein each part is fixed to compose a viewfinder system, so that assembly and maintenance can be easy and the optical axis can be prevented from deviating.

An apparatus is provided with a movable cartridge casing capable of facilitating film cartridge loading and unloading operations. In a loading operation, the cartridge casing is positioned at a cartridge receiving position outside the body of the apparatus so that the film cartridge can easily be inserted in the cartridge casing, the cartridge casing containing the film cartridge is pushed into the body to an intermediate position where the film spool of the film cartridge is separated from a spool driving shaft, and then the cartridge casing is moved toward the spool driving shaft along a line substantially parallel to the axis of the spool driving shaft to bring the film spool into engagement with the spool driving shaft. In an unloading operation, the cartridge casing is moved away from the spool driving shaft to the intermediate position along the line substantially parallel to the axis of the spool driving shaft to separate the film spool from the spool driving shaft, and then the cartridge casing is moved to the cartridge receiving position outside the body.

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Ibaraki, Japan

Ken Tanino