Hitachi Koki Co., Ltd.

Michio Yokosuka

Takao Umeda

Masayasu Anzai

Katsuhiko Suzuki

Tadahiro Kaneko

Ryoji Kojima

Teruaki Mitsuya

Keiji Kataoka

Each of optical fibers includes on the outer peripheral portion thereof a plate member which is used when assembling the optical fiber arrangement portion, and an optical fiber arrangement portion includes an optical fiber array in which the plate members of the optical fibers are superimposed on top of each other in such a manner that they are arranged in parallel to each other.

Image forming apparatus having an optical fiber array

A toner image fixing device in which a surface temperature of a heat roller ( ) is set to a temperature at which volatile odor component included in a parting agent is below a permissible value, and in which an auxiliary heating means ( ) is provided on at least one side of the upstream side and the downstream side in a recording material transporting direction in relation to a pressure contact portion of the heat roller and a pressure ( ).

Toner image fixing device using a parking agent including a volatile odor component

A fixing system for fixing toner images onto an image printing system such that the image printing medium bearing the toner images on the obverse side and the reverse sides thereof is passed through a nip area between a pair of fixing rollers. In the nip area, a rotation speed of a first fixing roller, which comes into contact with a not-yet fixed toner image, which is formed on the obverse side of the image printing medium, is set to be substantially equal to a rotation speed of a second fixing roller, which comes in contact with a not-yet fixed toner image, formed on the reverse side of the image printing medium. This is accomplished by setting the diameters of the various layers of the first fixing roller to be equal to that of the second fixing roller. When the image printing medium is moved through the nip area by the fixing rollers, a moving speed of the upper side of the image printing medium is equal to that of the lower side thereof. Thus, stresses on the image printing medium are not caused, and no character blur takes place.

Apparatus for printing on both sides of an image printing medium by one

In an electrostatic both-side printing system, a first image forming unit is provided upstream of an image printing medium when viewed in the transporting direction of the image printing medium, and a second image forming unit is provided downstream of the image printing medium. A medium transporting path for transporting the image printing medium is formed between the first and the second image forming units. A first transferring unit, located facing the first image forming unit with the medium transporting path intervening therebetween, for applying no charge onto the rear side of the image printing medium, which does not face the first image forming unit. A second transferring unit being located facing the second image forming unit with the image printing medium with the medium transporting path intervening therebetween, in a state that the second transferring unit is apart from a first toner image formed on the image printing medium by the first image forming unit. In the both-side printing system thus constructed, the first and the second image forming units, and the first and the second transferring units cooperate to form first and second toner images on both sides of the image printing medium, the first and the second toner images being opposite in polarity.

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Ibaraki, Japan

Michio Yokosuka